Environment Clearance Application · A-15, Pamposh Enclave, Greater Kailash - 1, New Delhi-110048 Environment Consultant Amaltas Enviro Industrial Consultants LLP (AEC). ... • Nearby

Environment Clearance Application (Conceptual Plan)

For Proposed SDMC Headquarter

At

IP Estate, New Delhi

By

South Delhi Municipal Corporation, New Delhi

Environment Clearance For Proposed SDMC Headquarter at IP estate, New Delhi

Conceptual Plan

M/s South Delhi Municipal Corporation Page 2

Table of Contents Introduction ................................................................................................................................ 4

General ................................................................................................................................... 4

Brief about Project Proponent ................................................................................................ 4

Project Consultant .................................................................................................................. 5

Brief about Project ................................................................................................................. 5

Site Surroundings and Connectivity .......................................................................................... 6

Location .................................................................................................................................. 6

Area Details ............................................................................................................................... 8

Ground Coverage and FAR Details ....................................................................................... 9

Population Density ................................................................................................................... 10

During Construction Phase ................................................................................................... 10

During Operational Phase .................................................................................................... 10

Land Environment ................................................................................................................... 10

Topography .......................................................................................................................... 11

Water Environment .................................................................................................................. 11

(Requirement and Consumption) ......................................................................................... 11

Construction Phase ............................................................................................................... 11

Operational Phase ................................................................................................................. 11

Wastewater generation ......................................................................................................... 14

During Construction Phase ............................................................................................... 14


Sewage Treatment Technology ........................................................................................ 14

Sewer System ................................................................................................................... 19

Preventive measures to Avoid Leaching .............................................................................. 20

Rainwater Harvesting and Storm Water Drain ........................................................................ 20

Need for Rainwater Harvesting ............................................................................................ 20

Rainwater Harvesting Network ............................................................................................ 20

Efficacy of Rain Water Harvesting .................................................................................. 21

Parking Details ......................................................................................................................... 22

5 % parking will be reserved for Disabled/ Old people near elevators or lift ......................... 23


Conceptual Plan


Electrical details ....................................................................................................................... 23

Power Details ....................................................................................................................... 23

D. G. Sets Details ............................................................................................................. 23

Integrated Fire Detection System ............................................................................................. 23

Solid Waste Details .................................................................................................................. 23

During Construction Phase ................................................................................................... 23


Collection and Segregation of waste ................................................................................ 25

Treatment of Waste .......................................................................................................... 25

Disposal ............................................................................................................................ 26

Organic Waste Converter ..................................................................................................... 26

Landscape Details .................................................................................................................... 28

Energy Conservation Measures ............................................................................................... 28

List of Figures Figure 1-Water balance Diagram during Summer Season ..................................................... 13Figure 2: Water Balance Diagram during Rainy Season ........................................................ 14Figure 3: Schematic Diagram of SBR Technology .................................................................. 19Figure 4: Rainwater Harvesting Structure .............................................................................. 22Figure 5: Solid Waste Management for Construction Phase .................................................. 24Figure 6: Solid Waste Management Scheme -Domestic Waste ............................................... 26Figure 7 : Organic Waste Converter ....................................................................................... 27List of Tables Table 1: Project Consultants Involved ...................................................................................... 5Table 2: Salient Features of the site .......................................................................................... 5Table 3: Geographical Co-ordinates of the site ........................................................................ 6Table 4: Site Surroundings and Connectivity ............................................................................ 7Table 5: Area Details of Proposed Building .............................................................................. 8Table 6: FAR details of the Building ......................................................................................... 9Table 7: Population Details for Proposed Building ................................................................ 10Table 8: Water Requirement during Operational Phase ......................................................... 12Table 9: Design Parameters for Sewage Collection System ................................................... 15Table 10: Wastewater Details .................................................................................................. 19Table 11: ECS Required .......................................................................................................... 22Table 12: Parking Proposed .................................................................................................... 22Table 13: Calculation of Solid Waste Generation ................................................................... 25Table 14: Landscape Area Details .......................................................................................... 28Table 15: List of Trees, Shrubs and climbers with nos. ........................................................... 28Annexure


Conceptual Plan


Annexure 1: Land Ownership Documents ............................................................................... 11

CCCOOONNNCCCEEEPPPTTTUUUAAALLL PPPLLLAAANNN Introduction General

• The Ministry of Environment, Forest and Climate Change has notified the

Environmental Impact Assessment (EIA) Notification, 2006 under the provisions of

the Environment (Protection) Act, 1986, which regulates development and their

expansion/modernization of 39 sectors/activities listed in the Schedule to the EIA

Notification, 2006.

• As per the EIA Notification 2006, All the building construction projects/Area

Development projects and Township Projects comes under schedule 8.All the

Building construction Projects which have built up area ≥20000 m2 and <1, 50,000 m2

• Total Built up area of the proposed site is 1,28,251.14 m

they come under schedule 8 (a). 2.

Brief about Project Proponent

Which comes under

schedule 8 (a) of listed schedules to Notification and has to obtain the Environment

Clearance from SEIAA/EAC.

• Municipal Corporation of Delhi, the second largest civic body was trifurcated in the

2012 into South Delhi Municipal Corporation (SDMC), North Delhi Municipal

Corporation (NDMC) and East Delhi Municipal Corporation (EDMC). SDMC is

serving the population of almost 56 Lacs citizen with a responsibility of monitoring,

upgrading and developing civic amenities efficiently with a view to create a better

tomorrow for citizens of Delhi

• It occupies an area of 656.91 Sq. K.M. which is further sub- divided into 4 Zones-

Central, South, West and Najafgarh Zone and has 104 wards. SDMC also has unique

distinction of providing civic services from highly posh residential and commercial

areas to rural and urban villages, JJ Resettlement Colonies, regularized and

unauthorized colonies. There are 388 Approved Colonies, 86 Rural villages, 81

Urbanized villages, 111 Unauthorized colonies, 252 Unauthorized regularized

colonies and 32 JJ Resettlement Colonies

• The proposed head quarter will situate at IP estate, New Delhi. There shall be two

wings i.e. Deliberate Wing and Executive Wing.


Conceptual Plan


Project Consultant Details regarding Project consultants involved are given below; Table 1: Project Consultants Involved

Project Team Details Architects Arcop Associates (P) Ltd.

A-15, Pamposh Enclave, Greater Kailash - 1, New Delhi-110048

Environment Consultant Amaltas Enviro Industrial Consultants LLP (AEC). A-73, Sector 65, Noida, UP

Landscape Architect Pravin Khot 59,Shubham Apartments Patparganj, New Delhi

MEP Consultant ARK consultant 1/30, Kakrola Rd, Roshan Garden II, Old Dharampura, Masudabad, Najafgarh, New, Delhi 110043

Project Management Agency (PMA)

NBCC (India) Limited NBCC Bhawan, Lodhi Road New Delhi - 110 003, India

Brief about Project • The proposed building shall be the office headquarters for the South Delhi Municipal

Corporation. The proposed site shall involve construction of deliberative wing and

executive wing having commercial section on upper floors.

• The proposed modern steel and glass building with an open up view of the River

Yamuna would be an iconic green building with 3-star GRIHA Rating with

incorporation of maximum smart features.

• The building will have green features such as zero waste discharge, solar power

generation to meet energy demands, real time response to climatic day light and

functional variation, an automated controls for efficiency through use of sensors, grey

water recycling, gain water harvesting, low energy consumption, use of automated

shades to reduce day light energy, use of water efficient fixtures etc

Table 2: Salient Features of the site

S. No. Description Proposed 1. Plot Area 20,234.28 m2 2. Proposed Built Up Area 1,28,251.14 m3.

2 Maximum Height 150 mtrs


Conceptual Plan


4. Maximum No. of Floors 2B+S+P+28 5. Cost of Project 700 Crores 6. Expected Population 6,990 7. Total Water Requirement 554 KLD 8. Fresh water requirement

• For Domestic purpose • For other purposes

117 KLD 396 KLD (During Dry season) 384 KLD (During Monsoon Season)

9. STP Capacity and Technology 210 KLD (SBR) 10. No. of RWH Storage tank 5 11. Parking Proposed 1,216 ECS 12. Solid Waste Generation 1,361 kg/day 13. Total Power Requirement 7,507.77 kVA

Site Surroundings and Connectivity Location The proposed site is connected to Delhi, Noida, and other NCR regions. It is surrounded by

places such as ITPO, Supreme Court, Purana Qila and National Sports Club, Mandi House,

Bappa Nagar, Balmiki Basti and kaka Nagar within 5km of the area of the site.

Geographical co-ordinates of the site are given in Table

Table 3: Geographical Co-ordinates of the site

Points Coordinates Corner Latitude Longitude

A 28°36'54.79"N 77°14'59.21"E B 28°36'54.29"N 77°14'58.41"E C 28°36'56.06"N 77°14'54.55"E D 28°36'59.19"N 77°14'53.56"E E 28°36'59.24"N 77°14'53.70"E F 28°37'00.42"N 77°14'53.29"E G 28°37'00.83"N 77°14'53.77"E H 28°37'00.55"N 77°14'56.93"E I 28°37'00.18"N 77°14'57.53"E

Connectivity Site is well connected to transport facilities as well as surrounded by densely populated areas

such as sanjay amar colony, Govt. officer’s colony, pandav nagar etc. Proposed site is

adjacent to Mahatma Gandhi marg in east and having Pragati Maidan halt railway station in

its west. To its west runs the main railway line to Central and Southern India. The site is

situated in Central Delhi and directly connected to India Gate and Purana Qila Road.


Conceptual Plan


Site surroundings and site connectivity within 15 km are shown in below table

Table 4: Site Surroundings and Connectivity

S.No. Particulars Name Distance ‘n’ Direction 1. Nearby Railway

Station • Pragati Maidan Halt • Hazrat Nizamuddin

Railway station • New Delhi Railway

station

Approx. 0.16 km, WSW Approx. 3.07 km, S Approx. 3.85 km, NW

2. Nearby Airport • Safdarjung Airport • Indira Gandhi

International Airport

Approx. 5.20 km, SW Approx. 15.97 km, SW

3. Nearby Populated Area

• Chandni Chowk • Patparganj • Government Officer

Colony • Sanjay Amar Colony

Approx. 2.9 Km in N Approx. 4.29 Km in E Approx. 1.13 km, WNW

Approx. 1.02 km in NNW

4. State Boundary • Delhi-UP state Boundary Approx. 6.26 km, SE 5. Nearby Highway • NH-24

• NH-48 • NH-2

Approx. 2.19 km in SE Approx. 4.94 km, SSE Approx. 4.93 km, S

6. Nearby Road • Mahatama Gandhi Marg • Bhairon Marg • Mathura Road

Adjacent, E Approx. 0.41km South Adjacent, W

7. Nearby Metro station

• Pragti Maidan • Inderprasth

0.97 km,NW 0.50 km in NE

8. Nearby School • Arvind Public School • Mater Dei School • Navyug Primary School

0.27 km in NNE 1.20 km in W 1.31 km in NW

9. Nearby Hospital • Dr. Ram Manohar Lohia Hospital

• Dharmashilla Narayana Superspeciality Hospital

4.64 km in WNW 6.52 km in NW

10. Place of worship • Qila –i-Kunha Masjid • Swaminarayan Mandir • Bangla Sahib Gurudwara

0.8 km, SW 2.65 km,E 4.02 km in NW

11. Water Bodies • Yamuna River • Old fort Lake

0.63 km in E 0.96 km in SW

12. Forest • Southern Ridge Forest 6.16 km in W (Source: Google Earth Pro)

Google map and topgraphical map showing site and surroundings are attached as annexure.


Conceptual Plan


Annexure 1-Google map showing site and surroundings within 500mtrs, 2 km, 5 km

Area Details

Annexure 2-Topographical map showing site and surroundings with 10+15 km

Total site area is 5 acre (20,234.28 m2

Area details are given in table below.

).The office complex shall be comprises of one

deliberative wing having G+4 floors and other is Executive wing having G+28 floors. The

office complex is proposing double basement with podium and stilt for parking.

Table 5: Area Details of Proposed Building

S. No. Particulars Area (m2) 1. Area under possession of SDMC since 1970 35,409.99 2. Area under possession of SDMC as per TSM

survey 25,625.68

3. Plot area allotted to SDMC (PA) 20,234.28 4. Permissible ground coverage @50% of PA 10,117.14 5. Proposed Ground Coverage @ 37.67% 7,623 6. Proposed FAR @2.99

• Executive wing • Deliberative wing

60,681 49,521 11,160

7. Built up area 1,28,251.14 8. Service Floor Area 1,819 9. Non FAR area (Fire staircase, mumty, machine

room etc) 9,968

10. Fire check Floor 1,862 11. Stilt area 15,134 12. Podium Area 14,580 13. Basement area

Upper basement area Lower basement area

24,207.14 12,103.57 12,103.57

14. Open area • Road area • Surface parking area

12,611.28 5,899 1,150

15. City tunnel area 5,609.9 16. Landscape area

Landscape area at ground level Landscape area at first floor Landscape area at fourth floor

12,423 2,322 7,588 2,513

17. Maximum height of the building (meters) 150


Conceptual Plan


Ground Coverage and FAR Details Ground coverage and floor wise details of executive and deliberative building are given in table below

Table 6: FAR details of the Building

S.No. Wing Floor area (m2) 01 Executive 1st 4,409 Floor

2nd 2758 Floor 3rd 4016 Floor 4th 1638 Floor 5th 1440 Floor 6th 1440 Floor 7th 1653 Floor 8th 1649 Floor 9th 1457 Floor 10th 1463 Floor 11th 1657 Floor 12th 1653 Floor

Commercial Floors

12 A Floor (Service floor) 13th 1506 Floor 14th 1709 Floor 14 A (Fire Check Floor) 15th 1496 Floor 16th 1687 Floor 17th 1683 Floor 18th 1472 Floor 19th 1460 Floor 20th 1647 Floor 21st 1436 Floor 22nd 1408 Floor 23rd 1602 Floor 24th 1583 Floor 25th 1375 Floor 26th 1359 Floor 27th 1525 Floor 28th 1340 Floor

Sub Total (A) 49,521 02

Deliberative

1st 3105 Floor 2nd 2447 Floor 3rd 2594 Floor 4th 3014 Floor

Sub Total (B) 11,160 Total FAR (A+B) 60,681


Conceptual Plan


Population Density During Construction Phase The total manpower requirement during construction phase of the site will be an approximate 100-150 person which includes workmen, labourers, supervisors, engineers, architect and Manager.

During Operational Phase The total population of the project will be 6,990 persons that include staff as well as visitor population .The detailed population breakup including Staff members as well as visitors is given in table below

Table 7: Population Details for Proposed Building

S. No. Description Floor Area (m2)

Occupant Load, Floor Area in m2/Person

Total Population

A. Deliberative building 1) 1st -3rd 8,146 Floor (Offices) 10 m2 815 /person 2) 4th 1,100 fixed

Seats + 200 seats

Floor (Auditorium (800 pax + senate hall(300 pax)+Meeting room (200 pax)

No. of fixed seats × 1.2 + 200

1,520

subtotal (A) B.

2,335 Executive wing

1) 1st -12th 25,233 Floor (Offices) 10 m2 2,523 /person 2) 13th – 28th 21,073 Floor (Commercial

area) 10 m2 2,107 /person

subtotal (B) C.

4,630 Security & Maintenance staff

25

Total Population (A-C) 6,990

Total population for SDMC headquarter is calculated as 6,990.

(Source: NBCC 2016, Part 4)

Land Environment • The land is under the possession of South Delhi Municipal Corporation, since, 1970.

After trifurcation of erstwhile Municipal Corporation of Delhi, SDMC was looking for

settings up headquarter. So this 5 acre of land is chosen for the purpose.

• The Master Plan for Delhi-2021, notified on 7.2.2007 divides the National Capital

Territory of Delhi into 15 Zones, of which 8 zones are in Urban Area (A to H).The

proposed land comes under sub zonal development plan of Zone-D. Zone ‘D’ (New


Conceptual Plan


Delhi), covering an area of 6855 Ha. (approx.), situated between river Yamuna and the

Ridge, comprises mainly of Lutyens Delhi and its extensions. The Zone is centrally

located, surrounded by the historic Shahjahanabad in the North, River Yamuna (Zone- O)

in the East, Pre 1962 Rehabilitation colonies like Paharganj, Karol Bagh, New Delhi

Railway Station and Pusa Institute in West and Ring Road in the South.

Topography Annexure 3: Land Ownership Documents

• Physically the natural capital territory of Delhi can be divided into 3 segments - the

Yamuna flood plain, the Ridge and the Plain. The entire area of the national capital

territory of Delhi is categorized as Bangar or the plain. The land of the plain is mostly

fertile

• The entire area of the site has contours with level +4 mts at rear from frontage, highest

elevation levels is 212 meters & the lowest levels is 208 meters.

Water Environment

Construction Phase (Requirement and Consumption)

During the construction phase the water requirement will be met from Private water or treated

wastewater from Nearby STP. No ground water will be extracted. Hence, there will be no

impacts on ground water environment during construction phase.

Operational Phase Total water requirement during the operational phase is 554 KLD. Fresh water requirement

for domestic purposes is approx 117 KLD however total freshwater requirement for domestic

and other purposes is 396 KLD (117+279 KLD) during summer season and 384 KLD

(117+267 KLD) during monsoon season, The primary source of water during operational

phase shall be municipal supply (DJB); secondary source of water shall be tube well, which

will be operated after obtaining permission from CGWA.

Detail of water requirements for various uses is given in below table. Efficient dual flushing

fixtures will be provided for conservation of fresh water. The demand may vary depending on

the water conservation methods employed by the facility, which may include use of water

efficient fixture, use of dishwashers, water auditing and metering etc


Conceptual Plan


Table 8: Water Requirement during Operational Phase

S.No. Description Total Population/Area

in m2

Unit water

Consumption LPCD

Water Requirement Total Water R (KLD)

Wastewater

generation

Flushing Use

(KLD)

Fresh water Use

(KLD)

Other Use

(KLD)

1.1 Domestic Use 1.2 Staff 3,116 45 62.32 77.9 140.22 124.64

1.3 Visitors 3,874 15 19.37 38.74 58.11 50.36 2.1 Other Use 2.2 Landscape

Area 12,423 1

litre/m

2 12.42 12.42

2.3 HVAC Cooling (TR)**

3,000 10hr/TR/10 ltr

300 300

2.4 DG* Set Cooling (KVA)

8,000 0.9/lt/kVA

43.20 43.20

Total (A+B) 81.69 116.64 355.62 553.95 175 KLD *D.G. sets operational hours - 6 hrs) ** HVAC operational hours - 10 hrs


Conceptual Plan


Fresh Water Supply Treated Water Supply Waste Water Supply

Total Fresh water requirement

(117+279KLD)

Fresh Water for Domestic Purpose

(117 KLD)

Flushing water requirement (82 KLD)

D.G. Cooling Requirement

(43 KLD)

HVAC Cooling (300 KLD)

Landscape (12 KLD)

Wastewater Generation (175 KLD)

STP capacity-210 KLD

@ 80%

@ 100%

82 KLD

12 KLD

43 KLD

21 KLD @ 90% = 158 KLD

279 KLD

Figure 1-Water balance Diagram during Summer Season


Conceptual Plan


Wastewater generation

During Construction Phase The quantity of sewage generation during the construction phase will be approx. 6 KLD.

Thus the sewage will be treated by providing small septic tanks, soak trenches and sulabh

shauchalaya type mobile toilets.

During Operational Phase Total quantity of wastewater generation will likely to be 175 KLD. The generated sewage

will be collected and treated in the in-house Sewage Treatment Plant of 210 KLD capacity.

The treated wastewater will be re used for flushing (82 KLD), gardening (12 KLD), DG

cooling (43 KLD) and HVAC cooling (21KLD during dry season and 33 KLD during

monsoon).

Sewage Treatment Technology The design of sewage network shall be done in accordance with the CPHEEO guideline,

NBC guidelines and reverent Indian Standards. Sewage generation is assumed to be 100% of

flushing water and 80% of domestic water.

Fresh Water Supply Treated Water Supply Waste Water Supply

Total Fresh water requirement

(117+267KLD)

Fresh Water for Domestic Purpose

(117 KLD)

Flushing water requirement (82 KLD)

D.G. Cooling Requirement

(43 KLD)

HVAC Cooling (300 KLD)

Wastewater Generation (175 KLD)

STP capacity-210 KLD

@ 80%

@ 100%

82 KLD

43 KLD

33 KLD

@ 90% = 158 KLD

267 KLD

Figure 2: Water Balance Diagram during Rainy Season


Conceptual Plan


The following parameters/ site conditions shall be kept in mind when designing the sewage,

Sludge and storm water drainage system.

• Natural slope of the area.

• Layout of different facility in the complex;

• Possibility of using complet e or part of the existing sewage network;

• Sub-soil water table;

• Provision of Sewage lifting station; ( if required)

• Provision of venting arrangement for manholes;

• Construction of manholes & laying of pipes considering ground condition;

• Termination of vent cowl at terrace level;

• Provision of adequate slope for horizontal header in the under slung pipes especially

for public toilets

• Sewage flow starts with fractional capacity and builds up to full capacity in due

course. An operational plan to meet this demand from a low flow to full flow will be

part of the design.

A summary of board design parameters to be adopted for designing Sewage supply system is given below.

Table 9: Design Parameters for Sewage Collection System

Different Use Norm Used Type of Collection System Separate System Design Period -30 years for sewers and appurtenances -15

years for pumps and electric equipment’s Peak Factor 3 Minimum velocity 0.6 m/sec Maximum velocity 3.0 m/sec Minimum size of pipe 250 mm (ID) Minimum depth of Sewer 1.0 m from FGL (0.6 m minimum cushion) Hydraulic Formula for calculation for design of sewer lines (As per CPHEEO manual 3.4.2.1 page no-36)

Manning’s formula V= 1/n*(R^2/3) *(S^1/2 ) V= Velocity R = Hydraulic mean depth = A/P S = Slope

Flow conditions in pipe up to 400 mm dia 0.50 full Flow conditions in pipe up to 300 mm dia 0.67 full Manning’s Co-efficient ‘n’ 0.011 Shape of sewers Circular Material of sewers HDPE Manhole Sizes As per manual on sewerage and sewerage

treatment/ IS4111:1985


Conceptual Plan


For depth above 0.9m & up to 1.65m 900 mm diameter For depth 1.65m & up to 2.3m 1200 mm diameter For depth 2.3m & up to 9.0m 1500 diameter

Technology Proposed- SBR (Sequential Bio Reactor) The operation of an SBR is based on a fill-and-draw principle, which consists of five steps—

fills, react, settle, decant, and idle. These steps can be altered for different operational

applications.

During the fill phase, the basin receives influent wastewater. The influent brings food to the

microbes in the activated sludge, creating an environment for biochemical reactions to take

place. Mixing and aeration can be varied during the fill phase to create the following three

different scenarios: Static Fill – Under a static-fill scenario, there is no mixing or aeration

while the influent wastewater is entering the tank. Static fill is used during the initial start-up

phase of a facility, at plants that do not need to nitrify or denitrify, and during low flow

periods to save power. Because the mixers and aerators remain off, this scenario has an

energy-savings component. Mixed Fill – Under a mixed-fill scenario, mechanical mixers are

active, but the aerators remain off. The mixing action produces a uniform blend of influent,

wastewater and biomass. Because there is no aeration, an anoxic condition is present, which

promotes denitrification. Anaerobic conditions can also be achieved during the mixed-fill

phase. Under anaerobic conditions the biomass undergoes a release of phosphorous. This

release is reabsorbed by the biomass once aerobic conditions are reestablished. This

phosphorous release will not happen with anoxic conditions. Aerated Fill – Under an aerated-

fill scenario, both the aerators and the mechanical mixing unit are activated. The contents of

the basin are aerated to convert the anoxic or anaerobic zone over to an aerobic zone. No

adjustments to the aerated-fill cycle are needed to reduce organics and achieve nitrification.

However, to achieve denitrification, it is necessary to switch the oxygen off to promote

anoxic conditions for denitrification. By switching the oxygen on and off during this phase

with the blowers, oxic and anoxic conditions are created, allowing for nitrification and

denitrification. Dissolved oxygen (DO) should be monitored during this phase so it does not

go over 0.2 mg/L. This ensures that an anoxic condition will occur during the idle phase.

Fill

React: This phase allows for further reduction or "polishing" of wastewater parameters.

During this phase, no wastewater enters the basin and the mechanical mixing and aeration

units are on. Because there are no additional volume and organic loadings, the rate of organic


Conceptual Plan


removal increases dramatically. Most of the carbonaceous BOD removal occurs in the react

phase. Further nitrification occurs by allowing the mixing and aeration to continue—the

majority of denitrification takes place in the mixed-fill phase. The phosphorus released

during mixed fill, plus some additional phosphorus, is taken up during the react phase.

Settle: During this phase, activated sludge is allowed to settle under quiescent conditions—no

flow enters the basin and no aeration and mixing takes place. The activated sludge tends to

settle as a flocculent mass, forming a distinctive interface with the clear supernatant. The

sludge mass is called the sludge blanket. This phase is a critical part of the cycle, because if

the solids do not settle rapidly, some sludge can be drawn off during the subsequent decant

phase and thereby degrade effluent quality.

Decant: During this phase, a decanter is used to remove the clear supernatant effluent. Once

the settle phase is complete, a signal is sent to the decanter to initiate the opening of an

effluent-discharge valve. There are floating and fixed-arm decanters. Floating decanters

maintain the inlet orifice slightly below the water surface to minimize the removal of solids

in the effluent removed during the decant phase. Floating decanters offer the operator

flexibility to vary fill and draw volumes. Fixed-arm decanters are less expensive and can be

designed to allow the operator to lower or raise the level of the decanter. It is optimal that the

decanted volume is the same as the volume that enters the basin during the fill phase. It is

also important that no surface foam or scum is decanted. The vertical distance from the

decanter to the bottom of the tank should be maximized to avoid disturbing the settled

biomass. This step occurs between the decant and the fill phases. The time varies, based on

the influent flow rate and the operating strategy. During this phase, a small amount of

activated sludge at the bottom of the SBR basin is pumped out—a process called wasting.

Advantages

1. The SBR system provides the flexibility needed to treat a variable wastewater (load and

composition) by simply adjusting the cycle, the duration of each phase or the mixing

/aeration pattern during each cycle

2. The operational flexibility of an SBR allows the control of filamentous bacteria through

feast/famine cycles. A high substrate concentration may be imposed by a static fill operation

and the react phase may be followed by an extended phase of starvation which, in turn,

promotes the enrichment of flock-forming bacteria and the accumulation of exo polymers

3. The operation conditions (alternating high/low substrate concentration) induce the

selection of robust bacteria. The sludge adaptation to variations in the oxygen and substrate


Conceptual Plan


concentrations, in the course of a cycle and on a long-term basis, renders it capable of

maintaining good performance under shock loads

4. The ability to hold contaminants until they have been completely degraded makes the

system excellent for the treatment of hazardous compounds

5. The capacity to adjust the energy input and the fraction of volume used according to the

influent loading can result in a reduction in operational costs. In addition, less space is

required as all operations occur in one basin

6. By minimizing eddy currents and turbulence during the settle phase, the concentration of

suspended solid (biomass) in the effluent can be kept low.

7. Sludge thickening can be extended during settle phase, thereby decreasing the water

content of the sludge wasted.

Operation and Maintenance The SBR typically eliminates the need for separate primary and secondary clarifiers in most

municipal systems, which reduces operations and maintenance (O&M) requirements. In

addition, RAS pumps are not required. In conventional BNR systems, anoxic basins, anoxic

zone mixers, toxic basins, toxic basin aeration equipment, and internal MLSS nitratenitrogen

recirculation pumps may be necessary. With the SBR, this can be accomplished in one

reactor using aeration/mixing equipment, which will minimize operation and maintenance

requirements otherwise be needed for clarifiers and pumps. Since the heart of the SBR

system is the controls, automatic valves, and automatic switches, these systems may require

more maintenance than a conventional activated sludge system. An increased level of

sophistication usually equates to more items that can fail or require maintenance. The level of

sophistication may be very advanced in larger SBR wastewater treatment plants requiring a

higher level of maintenance on the automatic valves and switches [2]. The recent advances

and cost reductions of microprocessors have been some of the causes of the revival of interest

in SBR technology, permitting automated control of the timing and sequence of process

phases and operation. The use of timers and DO monitors can be used to reduce costs

attributable to over aeration, thereby reducing the lag period of DO depletion and allowing

the maximum time for denitrification to occur. Significant operating flexibility is associated

with SBR systems. An SBR can be set up to simulate any conventional activated sludge

process, including BNR systems. For example, holding times in the aerated react mode of an

SBR can be varied to achieve simulation of a contact stabilization system with a typical

hydraulic retention time (HRT) of 3.5–7 h or, on the other end of the spectrum, an extended

aeration treatment system with a typical HRT of 18–36 h. For a BNR plant, the aerated react


Conceptual Plan


mode (oxic conditions) and the mixed react modes (anoxic conditions) can be alternated to

achieve nitrification and denitrification. The mixed fill mode and mixed react mode can be

used to achieve denitrification using anoxic conditions. In addition, these modes can

ultimately be used to achieve an anaerobic condition at which phosphorus removal can occur.

Conventional activated sludge systems typically require additional tank volume to achieve

such flexibility. SBRs operate in time rather than in space and the number of cycles per day

can be varied to control desired effluent limits, offering additional flexibility with an SBR

Sewer System

Figure 3: Schematic Diagram of SBR Technology

The alignment and slope of the sewer line will follow the road network, drains or natural

ground surface and will be connected to the trunk sewers. The discharge point will be a

treatment plant, a pumping station, a water course or an intercepting sewer. Pumping stations

would be provided at places where the natural slope of the terrain is insufficient to permit

gravity flow or the cost of excavation is uneconomical to do the same

Particulars

Table 10: Wastewater Details

Quantity Daily load 175KLD Duration of flow to STP 24 Hours Temperature 320

Inlet C

Outlet (Treated Wastewater )


Conceptual Plan


pH 6.5-8.5 6.5-8.5 S.S. (mg/l) 200-450 <20 BOD5 270 250-400 C (mg/l) <10 COD (mg/l) 600-800 <30 Oil & grease ABS (mg/l) <20 <5 E.coli (MPN) >106 >10 3

Preventive measures to Avoid Leaching Treated sewage from Sewage Treatment Plant will be conveyed to Treated Sewage Tank

through pipelines. All the joints from piping system will be checked periodically and carrying

treated wastewater pipes will be laid in conduits wherever road crossings are expected. Thus

no leaching of treated sewage into nearby water courses shall take place. Supervisors will be

employed for overall operation & maintenance of water supply, waste water treatment and

other utility services.

Rainwater Harvesting and Storm Water Drain A rainwater harvesting system comprises components of various stages -transporting

rainwater through pipes or drains, filtration, and recharging the ground water through tanks.

Percolation structures will be constructed for ground water recharge.

Runoff from the first spell of rain carries a relatively large amount of pollutants from the air

and catchments surface so the system will be provided with a filtration pit consisting of layers

of sand, gravel and pebbles of relevant sizes to remove impurities from the collected

rainwater.

Need for Rainwater Harvesting Surface water is inadequate to meet the daily demand and we have to depend on ground

water.

• Due to rapid urbanization, infiltration of rain water into the sub-soil has decreased

drastically and recharging of ground water has diminished.

• Rainwater harvesting prevents the flooding of low-lying areas in the site.

Rainwater Harvesting Network A rainwater harvesting system comprises components of various stages -transporting

rainwater through pipes or drains, filtration, and recharging the ground water through tanks.

Percolation structures will be constructed for ground water recharge.

Runoff from the first spell of rain carries a relatively large amount of pollutants from the air

and catchments surface so the system will be provided with a filtration pit consisting of


Conceptual Plan


layers of sand, gravel and pebbles of relevant sizes to remove impurities from the collected

rainwater.

Efficacy of Rain Water Harvesting The groundwater table at the site is observed at 5.30 mtrs to 6.50 mtrs below existing road

level. It is not advisable to recharge aquifer by rain water in areas with water table less than

8.0 M. In this case, storm water shall be stored and will be used for other purposes.

Percolation structures of suitable numbers will be provided for storage of storm water. A total

of 5 storm water storage collection tank will be constructed. The quantity of storm water load

for the proposed construction project is given below.

Calculations for storm water load

Roof-top area = Ground Coverage = 7,623 mGreen Area = 2,322 m

2

Total plot area = 20,234.28 m

2

Paved Area = Total Plot Area – (Roof-top Area + Green Area)

2

= 20,234.28 – (7,623 + 2,322) = 10,289.28 m

Runoff Load

2

Roof-top Area = 7,623 × 0.045 × 0.8 = 274.43 m3

Green Area = 2,322 × 0.045 × 0.1

/hr

= 10.45 m3

Paved Area = 10,289.28 × 0.045 × 0.75

/hr

= 347.26 m3

Total Runoff Load = 632.14 m

/hr

3

Taking 15 minutes Retention Time, Total volume of storm water = 632.14/4

= 158.04 m

/hr

3

Taking the effective diameter and depth of a Recharge tank 4 m and 2.5 m respectively,

Volume of a single Recharge pit = π r2h = 3.14 × 2× 2 × 2.5 = 31.4 m

Total number of storm water structure required = 158.04 / 31.4

3


Conceptual Plan


No. of Storage structure proposed = 5

Parking Details Figure 4: Rainwater Harvesting Structure

Adequate provision will be made for car/vehicle parking at the project site. There shall be

adequate parking provisions for visitors so as not to disturb the traffic and allow smooth

movement at the site.

Proposed project will be consists of basement, stilt and open parking. The parking space

criteria and area requirement provided are summarized in the table below. Parking details are

designed as per Delhi Building Bye Laws

Table 11: ECS Required

As per the MoEF&CC Parking Required FAR Area (m2 Total (ECS) ) For the Site (office building) 2 ECS/100 m2 60,681/50

of FAR area 1,214

Total Parking Required (ECS) 1,214 As Per DDA Parking Required FAR Area (m2 Total (ECS) ) For the Site (office building) 1.8 ECS/100 m2 60,681*1.8/100

of FAR area 1,092

Total Parking Required (ECS) 1,092

Table 12: Parking Proposed

Description Area Required Area (m2) Parking Proposed


Conceptual Plan


for 1 ECS ( ECS) In Basement (1&2) 1 ECS/32 m2 16,926 of

area 529

In Open

1 ECS/23 m2 1,150 of area

50

In Stilt 1 ECS/28 m2 9,265 of area

331

In Podium 1 ECS/28 m2 8,564 of area

306

Total Parking Proposed (ECS) 1,216

Electrical details

5 % parking will be reserved for Disabled/ Old people near elevators or lift

Power Details The power shall be supplied by BSES Delhi. The total demand load for the project will be

6,757 kW (7,507.77 kVA). The power demand shall be met by 5 nos. of transformer of 2500

kVA each (4W, 1 S).

D. G. Sets Details In case of power failure, there are 5 DG sets of 2000kVA each. It provides the 100% power

back up for the development. The location of DG rooms shall be either at the ground or in

Basement. DG set with load sharing & synchronizing panel. The DG sets shall be provided

with exhaust fans, cooling towers, pumps and piping including chimney and acoustic

insulation

Integrated Fire Detection System This will comprise of below mentioned components.

• Intelligent addressable Fire Detection system with communication, notification &

Interface capability.

• Manual call points for activation of fire alarm system manually.

• Integrated Emergency Voice Evacuation System.

• Interlocking with other equipments likes Elevators, Air-conditioning Units, Smoke

Extraction system etc.

Solid Waste Details During Construction Phase

The solid waste expected to be generated during the construction phase will comprise of

excavated materials, used bags, bricks, concrete, MS rods, tiles, wood etc. The following

steps are proposed to be followed for the management solid waste:

• Construction yards are proposed for storage of construction materials.


Conceptual Plan


• The excavated material such as topsoil and stones will be stacked for reuse during

later stages of construction.

• Excavated top soil will be stored in temporary constructed soil bank and will be

reused for landscaping during operational phase of the project.

• Remaining soil shall be utilized for refilling / road work / rising of site level at

locations/ selling to outside agency for construction of roads etc.

• Construction waste management is shown in below figure.

During Operational Phase

Figure 5: Solid Waste Management for Construction Phase

The project will adopt a systematic approach for solid waste collection and disposal. Solid

waste generated from the project will be collected properly and will be managed as per MSW

Rules, 2000 amended in 2016.

• Waste shall be mainly categories in two classes. 1. Bio degradable Waste 2 Non-

biodegradable Waste. The biodegradable portion dominates the bulk of MSW. This is

mainly due to food and paper waste.

• These solid wastes will be collected separately by putting three types of separate bins

at the source of generation. For the biodegradable waste yellow bins will be provided,

for the recyclable waste black bins and for the non-recyclable waste red bins will be

provided.


Conceptual Plan


• It is estimated that maximum solid waste generation would be about 1,361 kg/day; Following are the solid waste generation rate has been considered as is given table.

Table 13: Calculation of Solid Waste Generation

SI. No.

Description Occupancy Waste Generated (Kg per capita per

day)

Waste Generated (kg/capita/day)

1. Deliberative + Executive wings & Commercial floors Staff 3,116 0.25 779 Visitors 3,874 0.15 581

2. Horticultural Waste (3.07 Acers)

@ 0.2 kg/acre/day 0.61

Total Solid Waste Generation 1,360.61say 1,361

(Source: http://cpheeo.nic.in/WriteReadData/Cpheeo_SolidWasteManagement/chap3.pdf

Following arrangements will be made at the site in accordance to Municipal Solid Wastes (Management and Handling) Rules, 2000 and amended Rules; 2016.

)

Collection and Segregation of waste For Domestic Waste

• A door to door collection system will be provided for collection of domestic waste in

colored bins from every unit.

• The local vendors will be hired to provide separate colored bins for dry recyclables

and Bio-Degradable waste.

• For waste collection, adequate number of colored bins (Green and Blue & dark grey

bins– separate for Bio-degradable and Non Bio-degradable) are proposed to be

provided at the strategic locations of the area.

• Litter bin will also be provided in open areas like parks etc.

Treatment of Waste Domestic Waste Bio degradable Waste

• Bio-degradable waste will be subjected to the compost/resultant will be used as manure.

• STP sludge is proposed to be used for horticultural purposes as manure. • Horticultural Waste is proposed to be composted and will be used for gardening

purposes. Recyclable Waste • The cropped grass will be spread on the green area. It will act as manure after

decomposition. • Recyclable wastes like paper, plastic, metals etc. will be sold off to recyclables.

http://cpheeo.nic.in/WriteReadData/Cpheeo_SolidWasteManagement/chap3.pdf�


Conceptual Plan


Disposal Recyclable and non-recyclable wastes will be disposed through Govt. approved agency.

Hence, the Municipal Solid Waste Management will be conducted as per the guidelines of

Municipal Solid Wastes (Management and Handling) Rules, 2000 and amended Rules, 2016.

Solid waste management Scheme is depicted in the following figure.

Organic Waste Converter

Figure 6: Solid Waste Management Scheme -Domestic Waste

A waste converter is a machine used for the treatment and recycling of solid and liquid refuse material. A converter is a self-contained system capable of performing the following functions: pasteurization of organic waste; sterilization of pathogenic or biohazard waste; grinding and pulverization of refuse into unrecognizable output; trash compaction; dehydration.

Solid waste

Non Biodegradable

Waste

Recyclable

Blue bins

to Govt. approved Vendor

Non-Recyclable

Dark Grey Bins

to govt. approved agency

Biodegradable Waste

Green bins

Composter

Manure


Conceptual Plan


Figure 7 : Organic Waste Converter

1. Large quantity of solid waste is converted to fertilizer in a very short period Benefits of organic waste converter:

2. Fertilizers can be sold as compost to farmers, or used for gardening 3. Machine requires less space and the efficiency is high 4. Manpower and maintenance is very less 5. This is one of the latest techniques of managing solid waste.

Landscape Details • Total green area measures 12,423 m2

• A diverse variety of indigenous evergreen and ornamental trees would be planted. As

the project site for construction consists of trees, herbs and shrubs it will require

cutting of trees for construction purpose.

(61.39 % of Plot Area). Landscape area details

are as follow

• Presently no of trees present at the site area 385, no of trees to be replant area 110 and

trees to be cut are 263 however no. of trees proposed at the site area 625( retained at

the site shall be 12)

• The plant species will be selected on the basis of Urban Standard Plantation norms

and CPCB guidelines.

• Landscape Details are given in below table

Table 14: Landscape Area Details

Particulars Details Plot area 20,234.28 m2 Landscape area Proposed 12,423 m2

As Per MoEF Guidelines (61.39 % of Plot Area)

1 tree/ 80 m2

Number Of Trees Proposed To Be Planted

of total area 625 Trees (Existing Trees Retained= 12)

Area under shrubs __________ mArea undere Lawns

2 ________ m

Area under greenbelt 2

_______ m2

Table 15: List of Trees, Shrubs and climbers with nos.

S.No. Scientific Name Common Name Qty 1. White Frangipani plumeria alba obtusa 68 2. budha belly bamboo bambusa ventricosa 365 3. Date palm phoenix sylvestris 6 4. Chinese fan palm livistonia chinensis 50 5. Golden cane palm dypsis lutescens 68 6. Silver oak grevillea robusta 68

Energy Conservation Measures

• CFC free equipment, chillers with CFC-free environmentally friendly refrigerant will be installed to protect the ozone layer.

• The Building envelope details has been followed as per ECBC to reduce heat intake from outside. Walls, roofs and glass U values will be less than the ASHRAE Standard 90.1 2007 to save energy compared to baseline building energy consumption.


Conceptual Plan


• Lighting power densities are expected to be less than the ASHRAE Standard 90.1 2007 base line to save energy compared to baseline building criteria.

• Provision and space allocation for energy metering will be provided for the following system loads for continuous monitoring:

Air conditioning Internal lighting External lighting Treated Effluent water pumping Landscape water pumping

• Solar water supply shall be restricted to kitchens. • The DG set will be ISI rated and certified by the central pollution control board

(CPCB) for emission and noise. • Level controllers in water tanks will be provided to avoid overflow of water and waste

of energy • All pumps will be ISI rated with a minimum 60% efficiency • LED lamps will be provided in all display/exit sign boards to save energy • Movement sensors for lighting control will be provided in toilets, study rooms,

staircases, cabins, corridors, garbage rooms, balconies, washing and storage areas • Provision of 50% solar PV panel with LED Street lighting for the external area with

50% based on conventional LED Street lighting to be subjected to GRIHA Consultant advice.

• Provision of LED lighting over T5 fluorescent lighting.