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Membrane Bioreactor (MBR) Technology for Decentralized Wastewater Systems
Membrane bioreactor (MBR) technology offers a high-quality solution for on-site wastewater treatment, utilizing semi-permeable membranes to effectively remove contaminants. MBR systems are energy-efficient, easy to operate, and capable of handling difficult wastewater with consistent nutrient removal and effluent quality. Conclusively, MBR technology is a feasible option for residential and commercial applications, providing automated and low-maintenance operations.
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Membrane Bioreactor (MBR) Technology for Decentralized Wastewater Systems
- 1. MBR Technology forOn-site Wastewater Systems By Michael Moreau J&R Sales and Service Coalition for Buzards Bay’s 2011 Decision Makers Workshop Series March 24, 2011
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- 3. Membranes: What TheyAre 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. Membrane Spectrum Microfiltration Ultra filtration Nanfiltration 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. Type of Membranes Pore Size: Microfiltration Ultra filtration Nan filtration Reverse Osmosis (RO) Configuration Flat sheet Hollow fiber
- 6. Types of ImmersedMembranes Hollow Fiber Flat Sheet
- 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. Immersed Membrane Membrane submergeddirectly in process, outside to inside flow under vacuum Rejected Matter Permeate Membrane Permeable Matter Permeate
- 9. Immersed Membrane MBR Highsurface area – reduced energy consumption Commercialized 1990’s Permeate Bioreactor Recirculation low vacuum pressure (up to 7.5 psi)
- 10. Why MBR? TheHighest, 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. Why MBR? Simpleto operate (compared to other processes trying to achieve same effluent quality) Robust biological process Energy efficient Ability to treat difficult wastewater
- 12. Why MBR? Mixed Liquor MLSS5,000 – 16,000 mg/l Permeate BOD < 5 mg/l TSS < 1 mg/l Turbidity < 0.2 NTU Flow
- 13. MBR for On-SiteApplications 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. MBR for On-SiteApplications Completely automated Extended operation without needs for membrane cleaning and de-sludgeing Safe to use Cost effective
- 15. Filter Operation Direction of filtration Filtrate Filtratecollector Filter cake Removed by fine air bubble Membranes Air diffuser Page 15
- 16. Cleaning Procedures Everysix to twelve months Requires chemical(s) cleaning Clean–In– Place (CIP) or remove module(s)
- 17. BioBarrier™ MBR Markets Single-Home Residential Clustered Residential High-Strength Commercial
- 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
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- 23. 3,000 gpd BioBarrier®System
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- 27. 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
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- 30. Conclusions MBR isan 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.