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/GEIndia

1. Upgrading Conventional
Systems for Waste Water Reuse
Aquatech India, April 2013

2. CONTENT
• Conventional systems vs. Membrane systems
• Need for Membrane based systems
• Upgrading Conventional systems
• Summary

3. MEMBRANES vs. CONVENTIONAL
TECHNOLOGY
Membrane Treatment Conventional Treatment

4. MEMBRANES vs. CONVENTIONAL
TECHNOLOGY
Membrane Treatment Conventional Treatment
Modern and continuously
Technology Developed in the 1800’s
improving
Extremely compact Footprint Large land requirement
Physical barrier = reliable Gravity driven with coarse
Separation Process
filtration filtration
Fully automated with minimal
Operation Labor and chemical intensive
chemical use

5. MEMBRANES vs. CONVENTIONAL
TECHNOLOGY
Conventional AS Process ZeeWeed MBR Process
Primary
Clarifier
Activated Activated
Sludge Sludge
Secondary
Clarifier
Sand
Filter
Sludge
Digestion To Sludge
Dewatering
To Sludge Dewatering

6. ADVANTAGES OF MEMBRANE BASED
WASTEWATER SYSTEMS

7. 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 Membrane Membrane
Cassette Fiber
remote monitoring
• Lower post-disinfection demand in chlorine
and UV
Ideal technology for existing systems

8. RETROFITTING MBR SYSTEMS IN EXISTING
PLANTS

9. RETROFITTING MBR SYSTEMS IN EXISTING
PLANTS
• Use of existing tanks for biological process
volume & installation of membranes in
existing tanks
MBR retrofit into an • Use of existing tanks for biological process
volume & installation of membranes into
existing conventional new membrane tanks
WWTP can be
realized in several
ways • A combination of existing and new tanks
for use as biological and membrane process
volume

10. WHY IS MBR RETROFIT
BENEFICIAL?

11. WHY IS MBR RETROFIT BENEFICIAL?
• MBR operates at MLSS of ~10,000
Parameter Value Unit Comments
compared to CAS MLSS of ~3000, thus
enhancing biological treatment capacity
by > 3X BOD <5 mg/L
Typically non-
detectable
• Membrane filtration post biological Typically non-
TSS <1 mg/L
detectable
treatment provides superior quality
effluent As a function of
NH3-N < 0.5 mg/L biological
process design
• Increases usability of the effluent
< 0.03 mg/L
in reuse TP < 0.5 mg/L
achievable
As a function of
• Increases saleability of the TN <3 mg/L biological
effluent, especially for municipal process design
operators < 0.2 NTU 95%
Turbidity < 0.5 NTU of the time
• Provides expandability for the future achievable

12. 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

13. CASE STUDY:
DISTRICT COUNCIL OF ROTORUA, NZ
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

14. GE’S MBR: LEADING WASTERWATER
REUSE IN INDIA
Segments Served
“In India – for
India” Team Municipal
Range & Refinery
Flexibility
Food and Beverage
Best in class Power
Reuse Quality
Automotive
Tough
Institutional
Metals and Mining

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