Wastewater Treatment focusing on Resource Recoveryen.taipeiwater2018.com/Upload/files/Doc/Parallel...

Wastewater Treatment focusing on Resource Recovery

2018.08.31

2018 Taipei International Water Environment Forum

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Wang-Kuan Chang, Ph.D.

Deputy Division DirectorDivision of Water Technology Research,Material and Chemical Research Labs

Copyright 2018 ITRI 工業技術研究院

Technology Development Programs

Government Agency/

Administration

ITRIMCL

Division of Water Technology Research

System/Service

Providers

Industries

Academics

Investigation and evaluation

Technology R&D

System design Engineering planning System start-up

Technology transfer and licensing

Technological consultation

Science/technology research collaboration

• Innovative technology research and development

• Technology verification

• Research collaboration

Technology Research and Development

• Investigation and evaluation

• System design

• Engineering planning

• System start-up

• Technology support

Technology Service

Technology Transfer

• Technology transfer and licensing

• Patent licensing

Platform for Water Technology R&D, Services, and Promotion

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Pioneer research project

Policy promotion and implementation


•Upflow anaerobic sludge bed (UASB)•BioNET® Technology •Membrane bioreactor (MBR) and MBR system•Advanced Oxidation Processes- Fenton Family•Fluidized bed crystallization (FBC)•Electro Dialysis Reversal (EDR) -Water reclamation•Qwater

Implementation of Water Treatment Technology in Asia

China, Vietnam, Thailand, Singapore, Malaysia, Indonesia, India

Partners: • Environmental

Engineering Co.• Universities,• Research Institutes

Consultancy Service

Singapore - PUB

• Water use efficiency investigation• On-site auditing, counseling and

consultation on water saving and recycling• Training programs for government

agencies

Partners: NanyangTechnological University

•Disaster relief operation•Village water supply-Qwater

Humanitarian Operation

Philippines, Myanmar, India

Partners: Tzu Chi Foundation,Rotary International,NGOs

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Development of water technology with high efficiency, low energy consumption, and affordable cost.

Shift from Compliance with environmental legislation to water and resource reclamation

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Desalination(RO, FO, MD)Pretreatment(BioNET, UF)

Water Purification(UF, NF, Qwater, BioNET, CDI)

Sewage Treatment(MBR, BioNET)

Wastewater Treatment(UASB, Fenton, AFB, Ultrasound, BioNET, MBR, MD)

Water Treatment/Reclamation(UF, NF, EDR, CDI)

Decentralized Water Purification SystemEmergency Relief Water Supply( Qwater)

Copyright 2018 ITRI 工業技術研究院 5

Wastewater reuse Energy generation Valued chemical

recovery

Limited resource Sustainability

consideration Environmental

Protection


UASB designed by ITRI in Taiwan• more than 32 factories• more than 50 reactors• more than 40,000 m3

Total UASB in Taiwan :35,000 m3

Food processing, distillery, chemical processing, pulp and paper, petrochemical industry

Overseas application :Mainland China

MalaysiaVietnam

Upflow Anaerobic Sludge Bed (UASB)

Wastewater

Biogas for power generation

Treated effluent

Remove organics

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… … …

Aeration Tank

Sedimentation Tank

Coagulation Tank

Conditioning

Dewatering

Transportation

LandfillSludge Treatment Process

Concentration

Incineration

Sludge cake

Chemical SludgeBiological SludgePrimary Sludge

Wastewater

Sludge Production and Disposal Most wastewater treatment processes consume a lot of energy and generate

large amount of sludge.


Sludge Reduction and Biogas Production

Primary Clarifier

Aeration Secondary Clarifier

1. Sludge reduction

Ultrasound hydrolysis

Waste Sludge

Wastewater

Sludge Thickener

Sludge

2. Sludge reduction/ Biogas Production

Primary Clarifier

Aeration Secondary Clarifier

Waste Sludge

Wastewater

Digester

BiogasSludge

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Incorporation with sludge hydrolysis, Biological treatment processes produce less sludge and more biogas.


Industrial treated effluent • Industrial process water• Cooling water

ElectrodialysisReversal(EDR)

ITRI Electrodialysis Reversal(EDR): 8 patents(Taiwan, China, Singapore), 2 pendingsTech, Transfer: Three Engineering Companies

EDR desalination of Ground water for rinsing water( 50 m3/day)

EDR desalination of RO reject for rinsing water (electronics)(300 m3/day)

Recovery of wastewater from screw manufacturing factory for rinsing water by EDR process(450 m3/day)

Recovery of wastewater from PCB manufacturing factory for cooling tower by EDR process(1200 m3/day)

Recovery of fluoride-containing wastewater from wafer factory for scrubber by EDR process (1200 m3/day)

EDR desalination of high conductivity river water for process water( 2400 m3/day)

Desalination and reuse of RO concentratestream (Food industry)(300 m3/day)

Recovery of cooling water from electronics manufacturing factory by EDR process(550 m3/day)

Desalination and reuse of wastewater from precious screw manufacturing factory by EDR process (350 m3/day)

Desalination and reuse of direct cooling water from steel rolling by EDR process (550 m3/day)

Recovery of wastewater from chemical company for cooling water by EDR process(800 m3/day)

Recovery of wastewater from zinc-plating process for rinse water by EDR process ( 700 m3/day)

Recovery of wastewater from nylon fiber manufacturing company for cooling water by EDR process ( 800 m3/day)

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EDR for Zero liquid discharge EDR can concentrate brines far in excess of RO due to a lack of osmotic pressure

barriers.

EDR can be a very effective front-end softner and back-end brine concentrator when hybridized with RO

EDR used as back-end brine concentrator to reduce energy consumption (>30%) and chemical cost

EDR

City water Pure watersystem

Wastewater Treatment RO reclamation

evaporator Crystallizer Crystals

Recovery water

IX resins regenerationWaste liquor

RO brine

Water reuse

The first case to use EDR as back-end brine concentrator in ZLD

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Valuable chemicals recovery


Transforming ions in water into valuable chemicals

SodaWastewater

Effluent

Recycle

Distributor

Reagent

Carrier

Crystal

Carriers is in fluidized state

Applications• Fluoride-containing

wastewater treatment

• Water softening

• Heavy metal wastewater treatment

• Phosphate removal

• Ammonia/phosphate

Features• Reactor and

process control

• Influent flow distribution design

• Crystal growth control

Fluidized Bed Crystallization (FBC)


Storagetank

FBCreactor

Solid/liquidseparation

Scrubber Wastewater Treatment

CryoliteCrystals

(Na3AlF6)

Discharge

Waste liquor: 10,000 ~100,000 mg F/L

200~1000 mg F/L

(<15 mg F/L)

Sodium solution

NaCl solution

NaOH solution

Recovery of Cryolite from Waste Fluoride liquor

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FBC recovers soluble fluoride ions in water as valuable cryolite crystals

Other advantages include reducing sludge production, saving operating cost, and reducing environmental impact


Circular System for Water Resource

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Sewage

ValuableResourceRecovery

Industrial wastewater

Domestic users

Industries

Sewage treatment system

Wastewater treatment system

Water supply system

Rain water

River water

Groundwater Water and resource recycling system

Seawater desalination

Discharge

Sludgereuse

Water Reclamation

ZeroDischarge

• Reclamation of wastewater with acceptable water quality and low operation cost.

• Ions and Nutrient recovery from wastewater for environmental sustainability.

• Sludge generated form wastewater treatment is utilized for energy production.

Ions Recovery

Energy Recovery

Water Resource Recovery

Nutrient Recovery

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