in the era resource revolution - Mission...

of the resource

revolution

in the era

Himanshu Gupta Sales Director (South Asia)

supporting your growth

Technologies for Power Plant

Challenges for Power Plant of Today`

- Improve Water Efficiency

- Environmentally complaint

- Handling Waste & Management

Technologies for improving water efficiencies

Existing Technologies need extensions`

- Cooling Tower blow down is being recycled with Clarifier + UF + RO

with recoveries of 80-85%

- Power producers / engineers and consultants must ask for better

efficiencies – 92% - 95% - 98% are possible

- Integrated flow sheets are getting prepared and implemented in

country with very high efficiencies

- Proveness is must / Low life cycle cost should be non negotiable

- Overall water and mass balance should be prepared

1950 1960 1970 1980 1990 2000

1948 - Ionics develops

ion exchange membranes

1954 – ED Technology is

developed

1970 - Ionics introduces

reversal process to Electrodialysis

1997 – Introduction of

Ionics EDR 2020 System

EDR Timelines`

Electrodialysis

An electrochemical separation process in

which ions are transferred through ion

exchange membranes by means of a DC

voltage

Electrodialysis Reversal

A continuous self-cleaning electrodialysis

process by means of periodic reversal of

the DC polarity, switching concentrating

and diluting flow streams

What is Electrodialysis Reversal`

Cathode (-)

Anode (+)

Streams in EDR Process`

Feed

Product

STAGE

1

+ + + + + +

- - -

STAGE

2

+ + +

- - -

STAGE

3

- - -

+ + +

- - -

STAGE

450% 75% 87.5% 94 %

Optimal Salt Removal (50-94%)`

• Minimizes need for continuous chemical feeds

• Automatically cleans electrodes with acid formed during anodic operation

Why Polarity Reversal`

Mineral scale and colloids can accumulate

on the membrane surface during normal

operation.

Reversing the applied voltage cleans the

membrane surface of colloids and mineral scale.

This reduces antiscalant use and CIP frequency.

Technologies for reusing Treated Sewage water for cooling Tower

New Source – Treated Sewage`

- Treated Sewage water has high Organics, Ammonia, Seasonal

Variations

- Organics & Ammonia needs to bring down to lowest level

- Proveness is must / Low life cycle cost should be non negotiable

SUEZ Water Technologies & Solutions 13 I

Influent Pretreatment Effluent

Membrane filtration

Biological treatment

Mixed liquor recycle

MBR – Membrane Bio Reactor `

Activated

Sludge

Process

Stable Biological

Treatment Process

Membrane

Filtration

Absolute Solids

Separation

MBR

Advantages of MBR technology:

➢ Full biomass retention

➢ High MLSS concentrations

➢ Reduced bioreactor volumes

➢ “Specialist“ growth possible

➢ High (long) SRTs

➢ Better effluent quality

SUEZ Water Technologies & Solutions14 I

MBR – Membrane Bio Reactor `

o Strongest fiber in the industry

o Single fiber can hold over 50 kg

o Majority of modules ever installed are still in

service (first membrane installed in 1993)

o Widest range of solids tolerance

o From <1 mg/L TSS to >50,000 mg/L MLSS

(sludge thickening)

o Ability to handle water quality upsets

7 kg bowling ball!

ZeeWeed®

Membrane

SUEZ Water Technologies & Solutions15 I

ZeeWeed 500D – Most Robust Product`

SUEZ Water Technologies & Solutions16 I

How SUEZ MBR‘s are made`

Technologies for handling last bit of BAD Water

Cooling tower blowdown

Demineralizer waste

Process wastewater

Ash pond blowdown

Scrubber blowdown

Plant drains

FGD Blowdown

Gasification wastes

Boiler blowdown

Reverse osmosis reject

Electrodialysis reject ZLD systems have been widely used & proven since early 1970’s

Power Waste Streams Treated by ZLD`

Cooling Tower

Blow-Down

ZLD Brine

Concentrators

& Mixed Salt

Crystallizer at

USA Power

Station

• ZLD typically requires thermal or evaporative technologies to achieve solids and max recovery of water

• Evaporation is generally expensive and has high power requirement

• Pre-concentration enables reduction in size/capacity and therefore capex and opex of evaporator and crystallizer units

• ZLD systems integrate both conventional and membrane systems to pre-concentrate wastewater prior to thermal systems

ZLD – Zero Liquid Discharge`

Evaporation Crystallization Dewatering

ZLD – Zero Liquid Discharge - Scheme`

Used in waste water treatment to reduce the volume of waste and produce high quality distilled water as a product

Seeded slurry technology allows concentration without scaling of surfaces

Use Vapor Compression to reduce energy consumption, either using steam (TVR) or mechanical (MVR)

Good candidate streams are waste waters that are usually high in TDS

Capacities from 2 - 275 m3/hr evaporation in a single unit

Specific power consumption of 13 - 26 kWh/m3

Recoveries of 75%-99% (CF=4x-100x)

High Distillate quality of <50 mg/l TDS for reuse Seeded Slurry Technology uses preferential precipitation of calcium sulfate upon existing seed crystals and silica to prevent scaling of heat surfaces.

ZLD – Evaporators (Brine Concentrators)`

• Evaporates highly concentrated waste water (such as Brine Concentrator blowdown) to produce dry solids

• Typically forced circulation

• Either MVR or steam driven

• Crystallize either Mixed Salt

• Ideal for waste waters >60,000 ppm

• Solids are harvested from the crystallizer by filter press, centrifuge or dryer

• Capacities from 0.5 - 115 m3/hr of evaporation in a single unit

• Specific power consumption of 32 to 65 kWh/m3 of evaporation

• Recoveries of 65%-85%

• Produce distillate quality of < 50 mg/l TDS

ZLD – Crystallizers`

Cooling tower blowdown

Demineralizer waste

Process wastewater

Ash pond blowdown

Scrubber blowdown

Plant drains

FGD Blowdown

Gasification wastes

Boiler blowdown

Reverse osmosis reject

Electrodialysis reject ZLD systems have been widely used & proven since early 1970’s

Power Waste Streams Treated by ZLD`

Huntington, UT

1974Operated for 30 years

(New Thermal Products

Unit installed in 2005)

San Juan, NM

1974Still Operating

Pawnee Station,

CO

1980Still Operating

Proven Reliability at Power Stations`

250 drinking water and wastewater treatment plants built

50 water plants under Operation & Management

44 million people benefiting of drinking water supply

5,5 billion of liters of drinking water per day

15 million people benefit from network O&M

8,000 invisible leaks identified

6,000 km of underground distribution network mapped by GIS

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N°1 industrial water company in the region

>450 projects executed

4 factories comprising membrane rolling, equipment fabrication and

chemical blending

1 Center of Excellence for engineering supporting global projects

50% of existing oil refineries rely on water/wastewater plants built by SUEZ

10% turnover annual growth

Staff: 1200 employees

25 I

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30 years of presence in India

SUEZ in India

Water plants

Water services

Industry

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26 I our offer for industries

SUEZ is ready to workby your side

www.suez.com contact.industry@suez.com