Membrane Bioreactor (MBR) Technology for Decentralized Wastewater Systems

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A presentation about membrane bioreactor (MBR) technology for on-site wastewater systems. Presented by Michael Moreau from J&R Sales and Service during the Buzzards Bay Coalition's 2011 Decision Makers Workshop series. Learn more at www.savebuzzardsbay.org/DecisionMakers

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Membrane Bioreactor (MBR) Technology for Decentralized Wastewater Systems

  1. 1. MBR Technology for On-site Wastewater Systems By Michael Moreau J&R Sales and Service Coalition for Buzards Bay’s 2011 Decision Makers Workshop Series March 24, 2011
  2. 2. Membrane BioReactors (MBR)
  3. 3. Membranes: What They Are  Membrane are thin barriers or films of material that allow certain substances to pass.  Synthetic membranes are usually 100 to 500 microns thick.  Membranes that allow only some substrates to pass through them are called semi permeable membranes.  Useful membranes can be made from polymers, ceramics, metals, or porous materials impregnated with liquid or gelatin-like substances.
  4. 4. Membrane Spectrum Microfiltration Ultra filtration Nan filtration Reverse Osmosis PRESSURE INCREASING TRANSMEMBRANE PRESSURE DECREASING MEMBRANE OPERATIONAL LIFE Filtration in the 0.1 micron range is the most widely used membrane type in wastewater treatment applications.
  5. 5. Type of Membranes  Pore Size:     Microfiltration Ultra filtration Nan filtration Reverse Osmosis (RO)  Configuration   Flat sheet Hollow fiber
  6. 6. Types of Immersed Membranes Hollow Fiber Flat Sheet
  7. 7. Flat Sheet Membrane  Very suitable for small systems  Micro Filtration (0.08 – 0.3 microns)  Less chance of clogging  Rugged construction – strong, durable
  8. 8. Immersed Membrane Membrane submerged directly in process, outside to inside flow under vacuum Rejected Matter Permeate Membrane Permeable Matter Permeate
  9. 9. Immersed Membrane MBR High surface area – reduced energy consumption Commercialized 1990’s Permeate Bioreactor Recirculation low vacuum pressure (up to 7.5 psi)
  10. 10. Why MBR?  The Highest, Consistent Effluent Quality  BOD < 5 mg/L  TSS < 2 mg/L  Turbidity < 0.5 NTU  Fecal coli form < 200 CFU/100 mL (without disinfection)  Significant nutrient removal capability  Complete virus removal  Reduction of pharmaceutical byproducts
  11. 11. Why MBR?  Simple to operate (compared to other processes trying to achieve same effluent quality)  Robust biological process  Energy efficient  Ability to treat difficult wastewater
  12. 12. Why MBR? Mixed Liquor MLSS 5,000 – 16,000 mg/l Permeate BOD < 5 mg/l TSS < 1 mg/l Turbidity < 0.2 NTU Flow
  13. 13. MBR for On-Site Applications  Pre-engineered modules ship install-ready  Simple to install  Designed specifically for both new and existing onsite tank configurations  Minimum number of reliable mechanical devices
  14. 14. MBR for On-Site Applications  Completely automated  Extended operation without needs for membrane cleaning and de-sludgeing  Safe to use  Cost effective
  15. 15. Filter Operation Direction of filtration Filtrate Filtrate collector Filter cake Removed by fine air bubble Membranes Air diffuser Page 15
  16. 16. Cleaning Procedures  Every six to twelve months  Requires chemical(s) cleaning  Clean–In– Place (CIP) or remove module(s)
  17. 17. BioBarrier™ MBR Markets  Single-Home Residential  Clustered Residential  High-Strength Commercial
  18. 18. Basic Components  SaniTEE® Screen  Aeration Tank with Anoxic Zone  Membrane Module with Aeration Grid  Blower  Permeate Pump  Control  Level Floats  Supplemental Aeration for HSMBR
  19. 19. BioBarrier® 0.5
  20. 20. BioBarrier® Basic Components
  21. 21. BioBarrier® Basic Components
  22. 22. BioBarrier® 0.5
  23. 23. 3,000 gpd BioBarrier® System
  24. 24. Double-Stacked BioBarrier®
  25. 25. Single-Home BioBarrier® Parameters Flow, gpd BOD, mg/L COD, mg/L TKN, mg/L Total Nitrogen, mg/L Q - NH3-N, mg/L No. of days in service Influent 455 Effluent 455 200 <5 480 16 61 1.4 61 5.5 4.2 0.5 375 375
  26. 26. 9,000 gpd BioBarrier®
  27. 27. Conclusions  MBR is an attractive and feasible technology for on-site treatment applications.  Consistent nutrient removal is possible with MBR system…..Water reuse  MBR is more effective in treating wastewaters that are challenging for conventional biological treatment systems.

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