upgrading conventional systems for waste water reuse (aquatech 2013)
DESCRIPTION
Presented by Anand Krishnamurthy at Aquatech (India), 2013. In this presentation: - Conventional systems vs. Membrane systems - Need for Membrane based systems - Upgrading Conventional systems To know more about GE in India log on to: http://www.ge.com/in/ Connect with GE India online: https://www.facebook.com/GEIndia https://www.twitter.com/GEIndia https://www.youtube.com/GEIndiaTRANSCRIPT
Upgrading Conventional Systems for Waste
Water ReuseAquatech India, April 2013
CONTENT
• Conventional systems vs. Membrane
systems
• Need for Membrane based systems
• Upgrading Conventional systems
• Summary
MEMBRANES vs. CONVENTIONAL TECHNOLOGY
Conventional TreatmentMembrane Treatment
Membrane Treatment Conventional Treatment
Modern and continuously improving Technology Developed in the 1800’s
Extremely compact Footprint Large land requirement
Physical barrier = reliable filtration Separation Process Gravity driven with coarse
filtration
Fully automated with minimal chemical use Operation Labor and chemical
intensive
MEMBRANES vs. CONVENTIONAL TECHNOLOGY
Conventional AS Process
ActivatedSludge
SecondaryClarifier
SandFilter
PrimaryClarifier
SludgeDigestion To Sludge
Dewatering
ActivatedSludge
To Sludge Dewatering
ZeeWeed MBR Process
MEMBRANES vs. CONVENTIONAL TECHNOLOGY
ADVANTAGES OF MEMBRANE BASED WASTEWATER SYSTEMS
• Removes majority of pathogenic
organisms
• Smaller footprint/layout
• Consistently high product water
quality: Not affected by the influent
feed quality
• Provides product water quality for
unlimited reuse/recycling
• Modular expandability (minimal
additional cost for future expansion)
• Operational simplicity with potential
for remote monitoring
• Lower post-disinfection demand in
chlorine and UV
ADVANTAGES OF MEMBRANE BASED WASTEWATER SYSTEMS
Membrane Cassette
Membrane Fiber
Ideal technology for existing
systems upgrade
RETROFITTING MBR SYSTEMS IN EXISTING PLANTS
• Use of existing tanks for biological process volume & installation of membranes in existing tanks
• Use of existing tanks for biological process volume & installation of membranes into new membrane tanks
• A combination of existing and new tanks for use as biological and membrane process volume
MBR retrofit into an
existing
conventional WWTP
can be realized in
several ways
RETROFITTING MBR SYSTEMS IN EXISTING PLANTS
WHY IS MBR RETROFIT BENEFICIAL?
• MBR operates at MLSS of ~10,000 compared to CAS MLSS of ~3000, thus enhancing biological treatment capacity by > 3X
• Membrane filtration post biological treatment provides superior quality effluent
• Increases usability of the effluent in reuse
• Increases saleability of the effluent, especially for municipal operators
• Provides expandability for the future
WHY IS MBR RETROFIT BENEFICIAL?
Parameter
Value Unit Comments
BOD < 5 mg/LTypically non-detectable
TSS < 1 mg/LTypically non-detectable
NH3-N < 0.5 mg/LAs a function of biological process design
TP < 0.5 mg/L< 0.03 mg/L achievable
TN < 3 mg/LAs a function of biological process design
Turbidity < 0.5 NTU
< 0.2 NTU 95% of the time achievable
CASE STUDY: DISTRICT COUNCIL OF ROTORUA, NZ
CHALLENGE:
• Need to comply with stricter environmental requirements for discharge
SOLUTION:
• GE supplied an MBR filtration system featuring its ZeeWeed* 500D ultrafiltration membranes
• Project utilized an existing clarifier, installing UF membranes in the center
• MBR retrofit enhanced the plant’s capacity to handle its growing wastewater treatment needs and meet the tighter discharge regulations without building additional, costly civil structures
SUMMARY:
• Advancement of Membrane Bioreactor technology over the past 30 years has resulted in significant reductions in capital and operating costs
• MBR Design to retrofit existing, conventional plants has increasingly become an attractive option
• Utilize existing assets to expand plant capacity
• Greatly improve effluent quality
• Minimize new construction
• Combination of biological nutrient removal coupled with a membrane separation system maximizes the benefits of two advanced technologies
CASE STUDY: DISTRICT COUNCIL OF ROTORUA, NZ
GE’S MBR: LEADING WASTERWATER REUSE IN INDIA
“In India – for India” Team
Best in class Reuse
Quality
Range & Flexibility
Tough
Segments Served
Municipal
Refinery
Food and Beverage
Power
Automotive
Institutional
Metals and Mining
/GEIndia/GEIndia/GEIndia
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