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September 29th 2012 | New Orleans, Louisiana
Water Environment Federation | Student Design Competition
The Upgrade and Expansion of the Port Dover Water Pollution Control Plant
Ryerson Design Team
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Agenda
•Introduction•Current Process Overview•Design Philosophy•Phase I Upgrade and Expansion•Phase II Conceptual Overview•Conclusions
1
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Introduction: 2Port Dover Water Pollution Control Plant
WEF TEC 2012New Orleans, Louisiana, USA
Ryerson UniversityToronto, Ontario, Canada
Port Dover WPCPNorfolk County, Ontario, Canada
Source: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Introduction: 3Port Dover Water Pollution Control Plant
Lake Ontario
Lake Erie
Port Dover, Ontario
Toronto, Ontario
Cleveland, Ohio
Detroit, Michigan
Source: Google MapsPhoto: Wally Crawler
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Introduction: 4Port Dover Water Pollution Control Plant
Lake Erie
Overview of Current Plant:
• Most recent upgrade occurred in
• Treated wastewater sent directly into Lake Erie
• Activated sludge treatment using mechanical surface aeration
• Chemical addition for nutrient removal and disinfection
1991
Source: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Project Statement 5
Present a preliminary design and layout of an upgrade/expansion for the Port Dover WPCP to meet capacity for the year 2026, solving bypass issues.
Phase I
Phase IIPrepare a conceptual layout for Phase II of the expansion of the Port Dover WPCP to account for expected population grown beyond 2026.
Budget: $8,800,000 CND
Budget: $8,000,000 CND
6,400 to 12,800Population is expected to grow from
by 2026.
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Design Basis 6
Current Design Capacity
Phase I Design Capacity
Average Daily Flow (ADF) 5,400 m3/day 7,280 m3/day
Peak Daily Flow (PDF) 18,000 m3/day 24,880 m3/day
Changes In Design Capacity
24,880 m3/day
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Design Basis 7
Concentration at Average Flow
Ministry of Environment Effluent Limit
Current Plant Design Objective
CBOD5 200 mg/L 25 mg/L 15 mg/LTSS 160 mg/L 25 mg/L 15 mg/LTP 5.5 mg/L 1.0 mg/L 0.8 mg/L
TKN 35 mg/L N/A N/A
E. Coli N/A N/A 200 organisms/100 mL
Existing Characteristics
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Design Basis 7
Proposed Design BasisNew
Ministry of the Environment Effluent Limits
NewDesign Objectives
CBOD5 15 mg/L 10 mg/LTSS 15 mg/L 10 mg/LTP 0.5 mg/L 0.3 mg/L
Ammonia and
Ammonium Nitrogen
Apr 1 –Sept 30:
Oct 1 – Mar 30:
5.0 mg/L
9.0 mg/L
April 1 –Sept 30:
Oct 1 – Mar 30:
3.0 mg/L
5.0 mg/L
E. Coli 150 organisms/100 mL 100 organisms/100 mL
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 8Existing Port Dover WPCP Layout
To Landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Land Application
To Lake Erie Design CapacityAverage Daily Flow: 5,400 m3/dayPeak Daily Flow: 18,000 m3/day
> 18,000 m3/day > 18,000 m3/day Raw Wastewater
Discharge!
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 9Points of Concern with Current Design
with the current plant have been identified.
5 issues
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 10Points of Concern with Current Design
To land application
To landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Lake Erie
Issue 1: Gross Solids Buildup
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 10Points of Concern with Current Design
Issue 1: Gross Solids Build Up
Solids build up on bar screen causes total plant bypasseven when flow does not exceed plant capacity
Current bar screen has single rake
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 11Points of Concern with Current Design
To land application
To landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Lake Erie
Issue 2: Raw Wastewater Discharge
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 11Points of Concern with Current Design
Issue 2: Raw Wastewater Discharge
There are 10-21 bypass events each year from clogging and wet weather events
Source: Google Maps
Not acceptable!
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 12Points of Concern with Current Design
To land application
To landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Lake Erie
Issue 3: Chemical Addition for Nutrient
Removal
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 12Points of Concern with Current Design
Issue 3: Chemical Addition For Nutrient Removal
Chemically precipitated phosphates are not readily bioavailable
Dependence on ferric chloride is not cost effective
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 13Points of Concern with Current Design
To land application
To landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Lake Erie
Issue 4: Inefficient Aeration
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 13Points of Concern with Current Design
Issue 4: Inefficient Aeration
Mechanical aeration is outdated! •Poor efficiency •Poor control
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 14Points of Concern with Current Design
To land application
To landfill
Screening and Grit Vortex
Primary Clarifier
Aeration Basin
Secondary Clarifier
Disinfection
AnaerobicDigester
Ferric ChlorideSodium Hypochlorite
To Lake Erie
Issue 5: Chemical Addition for Disinfection
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 14Points of Concern with Current Design
Issue 5: Chemical Addition For Disinfection
Dechlorination may be required for increased flow rates, increasing cost per litre treated
Problematic for aquatic life, may produce harmful by-products
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Design Philosophy: 15Commitment to Sustainable Design
Source: NOAA (US)
Source: Sandusky Register
EutrophicationAlgal blooms caused by increased nutrient levels in bodies of water can reduce the level of dissolved oxygen.
Eutrophication decreases enjoyment of waterways and property values.
It harms aquatic ecosystems and poses a human health hazard.
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Design Philosophy: 15Commitment to Sustainable Design
The choices we make affect the future of Lake Erie
The Ryerson Design Team aims for the following in our design:
•The introduction of a more advanced treatment
•The reduction of energy consumption
•The removal or reduction of chemical addition
We aim to show that sustainable and advanced treatment is a more cost effective and responsible choice
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Process Overview: 16Points of Concern with Current Design
The Ryerson Design Team has applied their philosophy to solve to the at Port Dover.
5 issues
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 17
Solution to Issue One: Upgrade to Bar Screen
The bar screen channel is widened to accommodate a larger screen for increased flow
A multi rake system is installed for increased solids removal
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 18
Solution to Issue Two: Installation of Overflow Tank
Adding a bypass overflow tank will prevent untreated wastewater from entering Lake Erie
Tank volume sized based on historical wet weather event data
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 19
Solution to Issue Three: Adaptation of Westbank Biological Nutrient Removal Process
Reduction of discharge BOD concentration
Reduction of discharge nutrients• Nitrogen as ammonia and ammonium• Phosphate
Advanced Treatment
Conventional
How does BNR work?
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 20
Reduction of Discharge BOD ConcentrationRequires:•Heterotrophic organism (about 26% of MLSS)•Terminal electron acceptor – Oxygen or Nitrates
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 21
Reduction of Discharge Nutrient Levels - Phosphate
Anaerobic Zone
Physical uptake of phosphate into Phosphate Accumulating Organisms (PAO)
VFA
P
PHA
Aerobic or Anoxic Zone
P
PHA
P P
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 21
Reduction of Discharge Nutrient Levels - NitrogenNitrification
Ammonium + Oxygen
NitrosomonasNitrobacter
Nitrate + Water + H+
Facilitated by Autotrophic microbes – 2% of MLSS
Rate limiting!
Nitrates + Carbon Source
Heterotrophic microbes
Nitrogen Gas + Carbon Dioxide + Water
Denitrification
Secondary Treatment: BNR and BOD reduction
Secondary Treatment Reactors
Anoxic Anaerobic Aerobic Clarifier
Waste Activated Sludge (WAS)
Volatile Fatty Acids (VFA)
Wastewater Recycle (WR)
Return Activated Sludge (RAS)
27Phase I Upgrades 22
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Secondary Treatment: BNR and BOD reduction
1 2 3 4 5 6 7 8 9 10 11 120
1
2
3
4
5
6
7
8
9
10
Expe
cted
effl
uent
(NH
4+ +
NH
3)-N
co
ncen
trati
on [m
g/L]
Temperature Effects on Ammonium removal
Effluent Limits
Effluent Goals
Expected effluent concentration with 5,250 m3 reactor
Jan
Feb
Mar
AprilM
ay
June July
Aug
Sept Oct
Nov Dec
12.2 ᵒ C
25.7 ᵒ C
31Secondary Treatment: BNR and BOD reduction 27Phase I Upgrades 23
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 24
Solution to Issue Four: Use of Fine Bubble Diffusers for Aeration
Increased oxygen transfer and energy efficiency
Source: WEC Projects
Automated controls ensure proper performance
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrades 25Ultraviolet Disinfection and Sand Filters
Solution to Issue Five: Sand Filtration and UV Disinfection
Use of ultraviolet disinfection eliminates the requirement for chemical addition
Moving bed sand filtration prior to disinfection:
Source: water-technology.net
•Better nutrient removal•Less UV power required
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrade and Expansion 26
Bar Screen Vortex Grit Chamber
Headworks and Primary Clarification
Raw Wastewater
Effluent to Lake Erie
Overflow to By-Pass
Rectangular Primary Clarification
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Upgrade and Expansion 26
Bar Screen Vortex Grit Chamber
Overflow Tank
Headworks and Primary Clarification
Raw Wastewater
Effluent to Lake Erie
Overflow to By-Pass
Rectangular Primary Clarification
Volume: 575 m3
16m L X 7m W x 5m H
Type: Multi-RakeCapacity: 24,800 m3/dayWidth: 700mmBar Spacing: 40mm
Additional Volume: 8.54 m3
Detention Time: 30sGrit Removal: 2.29 m3/day (PDF) 0.67 m3/day (ADF)
Sludge Fermenter
18.5 mg/L VFAs in Winter23.5 mg/L VFAs in SummerSRT: 5 days (ADF) 2 days (PDF)
Additional SA: 105 m2 (22.9m L x 4.6m W)Goal SOR: 70m3/day-m2
HRT: 4.2 h (ADF) 1.2 h (PDF)
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
27
Secondary Treatment
From Primary Clarifiers
Mechanical Aeration Chamber
Circular Secondary Clarifiers
To Digester
To Disinfection
Ferric Chloride
Phase I Upgrade and Expansion
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
27
Secondary Treatment
From Primary Clarifiers
Mechanical Aeration Chamber
Circular Secondary Clarifiers
Anoxic
Aerobic Reactor
Dissolved Oxygen To Digester
To Disinfection
VFA from Primary Fermenter
Anaerobic
Phase I Upgrade and Expansion
Anoxic ReactorVolume: 668 m3
HRT: 0.34 h (PDF) 1.2 h (ADF)SRT: 6.4 days
Anaerobic ReactorVolume: 668 m3
HRT: 0.34 h (PDF) 1.2 h (ADF)
Aerobic ReactorVolume: 5,250 m3
HRT: 2.7 h (PDF) 9.1 h (ADF)SRT: 15 daysDO Required: 2mg/L
Diameter: 18mSide Wall Depth: 4.6mBottom Slope: 1:12Goal SOR: 35m3/day-m2
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
28
Disinfection
From Secondary Treatment
Effluent to Lake Erie
From Secondary Bypass
Chlorine Contact Chamber
Sodium Hypochlorite
Phase I Upgrade and Expansion
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
28
Disinfection
From Secondary Treatment
Effluent to Lake Erie
From Secondary Bypass
Chlorine Contact Chamber
Sodium Hypochlorite
Phase I Upgrade and Expansion
Continuous Backwash Sand Filters Ultraviolet Disinfection
Chlorine Contact Chamber
Number of filters: 14Total SA: 71.4 m2
TSS Reduction: 90%
Dose: 20 mW sec/cm2 (PDF) 15 mW sec/cm2 (ADF)
Effluent Quality: 50 organisms / 100 mL
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
29
Solids Handling
To LandfillScreenings and Grit
Primary Sludge
Waste Activated Sludge
Egg Shaped Digester
Methane to Boiler
To Biosolids Storage and Land Application
Phase I Upgrade and Expansion
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
29
Solids Handling
To LandfillScreenings and Grit
Primary Sludge
Waste Activated Sludge
Egg Shaped Digester
Methane to Boiler
To Biosolids Storage and Land Application
Phase I Upgrade and Expansion
Sludge Fermenter
VFA to Anaerobic Reactor
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Plant Layout 30
Source: Google Maps
Headworks and Primary Treatment
Secondary Treatment and Nutrient Removal
Disinfection
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Hydraulic Profile 31
Source: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Hydraulic Profile 31
Source: Google Maps
191m Elevation
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Hydraulic Profile 31
Source: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Hydraulic Profile 31
Source: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Effluent Characteristics 32
Effluent Limit Expected Effluent
CBOD5 15 mg/L 8.6 mg/LTSS 15 mg/L 1.5 mg/LTP 0.5 mg/L 0.5 mg/L
Ammonia and Ammonium
Nitrogen
Apr 1 –Sept 30:
Oct 1 – Mar 30:
5.0 mg/L
9.0 mg/L
Apr 1 –Sept 30:
Oct 1 – Mar 30:
1.3 mg/L
2.3 mg/L
E. Coli 100 organisms/100 mL 50 organisms/100 mL
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I Safety and Environmental 33
Plant and Process Safety
None of the process changes proposed pose considerable additional safety concerns
The design should account for all applicable codes and regulations under the Occupational Health and Safety Act, the Building Code Act, 1992 and the Fire Protection and Prevention Act, 1997.
Environmental ConcernsConstruction must take place in a manner with the least impact on the surrounding environment.
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I: Noise and Odour 34
Source: Google Maps
Sensitive Land Use
100m
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Phase I SCADA Upgrades 35
Location Monitoring Control
Overflow Tank Liquid Level Pump Speed
Aerobic Reactor Dissolved Oxygen Blower Rate
Sand Filters Flow Rate Blower Rate
Primary Fermenter Flow Rate Pump Speed
Equipment and FacilityElectrical and Process ControlRetrofit and DemolitionEngineering ServicesContingency
Equipment and FacilityElectrical and Process ControlRetrofit and DemolitionEngineering ServicesContingency
Equipment and FacilityElectrical and Process ControlRetrofit and DemolitionEngineering ServicesContingency
Equipment and FacilityElectrical and Process ControlRetrofit and DemolitionEngineering ServicesContingency
8%
Phase I Capital Cost 6
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
36
Equipment and FacilityElectrical and Process ControlRetrofit and DemolitionEngineering ServicesContingency
Equipment and Facility
Electrical and Process Control
Retrofit and Demolition
Engineering Services
Contingency
69%10%
10%3%
Total Phase I Cost: $7,338,000 CND Phase I Budget: $8,800,000 CND
Phase I Operational Cost 6
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
37
Maintenance Costs
Electricity Costs
Labour Costs
20%
36%44%
Operations and Maintenance: $552,000 CND/yearEstimated Chemical Savings: $135,000 CND/year
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Construction Schedule 38
Phase II Conceptual Overview 6
April 22nd 2012 - Ottawa, Ontario
Source: Google MapsSource: Google Maps
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Upgrade of bar screen channel width
Evaluate the use of cogeneration and pasteurization for effluent disinfectionAdditional primary clarifier may be neededChemical free dewatering such as gravity belt thickeners for space savings
Use of fixed film process to increase MLSS without solids loading on clarifiers
Upgrade odor control to include buildings over nutrient removal and biofilters for treatment of air discharged to the environment
39
Concluding Remarks 40
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
The Ryerson Design Team has presented a preliminary design for the upgrade and expansion of the Port Dover site
and a conceptual plan for the future of the site
The presented design:is under budget
advances treatment levels
presents O&M savingsrepresents a sustainable solution to plant issues
Concluding Remarks
5 issues were solved
41
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
Issue Solution
1. Gross solids buildup causing bypass
Upgrade to bar screen system
2. Raw Water Discharge Addition of overflow tank3. Dependency on chemical addition for nutrient removal
Adoption of biological nutrient removal
4. Inefficient Aeration Use of fine bubble diffusers5. Dependency on chemical addition for disinfection
Installation of sand filters and UV disinfection
Concluding Remarks 42
Ryerson University Design Team | WEF SDC September 29th 2012 | New Orleans, LA
The Ryerson Design Team wishes to thank and acknowledge:
Dr. Manuel Alvarez-Cuenca, Ph.D., P.Eng, Faculty AdvisorProfessor of Chemical Engineering – Ryerson University
Maryam Reza, M.A.Sc., Consulting AdvisorWastewater Design Engineer – Cole Engineering Group Ltd.
The Department of Chemical Engineering - Ryerson UniversityThank You!
