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Membrane bio reactor- Waste water treatment

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The document discusses MBR (membrane bioreactor) wastewater treatment technology. MBR combines microfiltration or ultrafiltration membranes with a suspended growth bioreactor. It provides advantages over conventional activated sludge processes like higher quality effluent, less sludge production, and shorter retention times. Industrial Solutions Lanka has experience designing and implementing MBR systems for pharmaceutical wastewater treatment plants. Their project for a Morison facility treating 80 m3/day of wastewater achieved over 99% COD reduction using an MBR system.

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The MBR Technology
MBR MBR or Membrane bio reactor is the latest wastewater treatment technology which is the combination of microfiltration or ultrafiltration with bio reactors. The MBR technology provides the following advantages over ASP: 1. High-quality effluent 2. Less sludge production 3. Higher volumetric loading rates 4. Shorter hydraulic retention times (HRT). What is MBR???
MBR PROCESSMBR Vs AS Process
ACTIVATED SLUDGE PROCESS (ASP) If we go for a conventional activated sludge process, the required aeration tank volume ; ＄ = 220 3 6000 / 0.13500 / = 3771.43 3 So the reactor volume is practically impossible for the operation also the MLSS loading is less compared with the MBR operation. So ISL decided to go with MBR treatment technology rather than the conventional ASP process (We need several reactors to carryout the process if we need ASP).
MBR MBR Configurations
FLAT SHEET MEMBRANES
MBR MEMBRANE . Hollow Fiber MBR MEMBRANE
OUR EXPERTISE IN MBR. ISL has successfully designed and commissioned MBR wastewater technology to pharmaceutical wastewater at Morison Limited. (Sub group of HEMAS Holdings). Daily wastewater discharge from Morison facility is 80 m3/day and influent quality was attached here.
MORISION. After the Anoxic tank, wastewater directed to the MBR system with aeration tank where the 99% of reduction COD reduction occurs. In aeration the MLSS is kept as 8000 mg/l.
No Description Value Unit 1. Fat, Oil & Grease <10.0 mg/l 1. Total suspended solids (TSS) 200.00 mg/l 1. Turbidity 750 NTU 1. pH 4.5-6.0 1. Biological oxygen demand (BOD5) 100.00 mg/l 1. Chemical oxygen demand(COD) 1,500.00 mg/l 1. Electrical conductivity 1,000.00 袖s/cm 1. Total dissolved solids 650.00 mg/l 1. Sulphite 8.00 mg/l 1. Color range Yellow range 436 nm Red range 525 nm Blue range 620nm 20 14 12 m-1 m-1 m-1 Influent wastewater parameters
ISL Successfully complied with the SLS 614:2013 standards using MBR technology. No Description Value Unit 1. Fat, Oil & Grease N/D mg/l 1. Total suspended solids (TSS) <1 mg/l 1. Turbidity <2 NTU 1. pH 7.0-8.5 - 1. Biological oxygen demand (BOD5) Nil mg/l 1. Chemical oxygen demand(COD) <10 mg/l 1. Electrical conductivity <250 袖s/cm 1. Total dissolved solids <150 mg/l Treated water parameters
MBR DESIGN BASIS Design Flux 20 LMH So the required membrane area only for the filtration of membrane = 11103 / 20 瑞 = 550 2 Considering the backwash and CIP =2 m3 filtrate required per hour. Filtration pump minimum flow requirement - 13 m3/h
CONTINUE.. Aeration required, COD loading per day 6000 g/m3 * (11*20) m3/day 1320 Kg COD /day O2 requirement per kg of COD - 1320 Kg COD /day * 1.1 kg O2/kg COD 1452 kg O2/day Required Air volumetric flow rate with OTE - 1452 2/ 1.2 /30.20.22060 = . / Actual Aeration Requirement By industrial standards = / = /
SLUDGE GENERATION Daily Sludge Generation =ヰ, = = 8000 3 6203 30 = 165.33 / Daily Slurry Generation (98% Moisture) = 8266.5 kg/day. If we are going to use screw press for dewatering = 2 tons/day (Maximum).
INFLUENT PARAMETERS Parameter Unit Value Condensate Flow rate m3/hr 11 Biological Oxygen Demand (BOD5) mg/l 500-600 Chemical Oxygen Demand (COD) mg/l 3000-6000 Total Dissolved Solids (TDS) mg/l 160-210 Electrical Conductivity at 25 oC 亮S/cm 300-320 Oil and grease mg/l 6-20 Dissolved Phosphates (as P) mg/l 4.5-5.5 Total Kjedahl Nitrogen ( as N) mg/l 140-160 Ammonical Nitrogen (as N) mg/l 60-75 Sulphide (as S) mg/l 6-7.6 Copper (as Cu) mg/l 0.015-0.025 Iron (as Fe) mg/l 0.6-0.9 Zinc (as Zn) mg/l 0.05-1.00 pH 3-3.2
EXPECTED TREATED WATER QUALITY Parameter Unit Maximum desired value Total Suspended Solids (TDS) mg/l Max. 50 pH at ambient temperature - 6.5-8.5 Biochemical Oxygen Demand mg/l 30 Phenolic compounds (as C6H5OH) mg/l 1 Oil & Grease mg/l 6-20 Chemical Oxygen Demand (COD) mg/l 250 Dissolved phosphates (as P) mg/l 5 Total Kjedahl Nitrogen (as N) mg/l 140-160 Ammonical Nitrogen (as N) mg/l 50 Sulfide (as S) mg/l 2 Iron (Fe) mg/l 3 Copper (Cu) mg/l 3 Zinc (Zn) mg/l 2 Color Wavelength range Yellow range (436nm) Red range (525 nm) Blue range (620 nm) Max. absorption coefficient 7m-1 5m-1 3m-1
MBR SPECIFICATIONS MBR SPECIFCATION (Flat Sheet)
Our Services Installation Operation Startup Support
Industrial Solutions Lanka

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Membrane bio reactor- Waste water treatment

  • 2. MBR MBR or Membrane bio reactor is the latest wastewater treatment technology which is the combination of microfiltration or ultrafiltration with bio reactors. The MBR technology provides the following advantages over ASP: 1. High-quality effluent 2. Less sludge production 3. Higher volumetric loading rates 4. Shorter hydraulic retention times (HRT). What is MBR???
  • 3. MBR PROCESSMBR Vs AS Process
  • 4. ACTIVATED SLUDGE PROCESS (ASP) If we go for a conventional activated sludge process, the required aeration tank volume ; ＄ = 220 3 6000 / 0.13500 / = 3771.43 3 So the reactor volume is practically impossible for the operation also the MLSS loading is less compared with the MBR operation. So ISL decided to go with MBR treatment technology rather than the conventional ASP process (We need several reactors to carryout the process if we need ASP).
  • 8. OUR EXPERTISE IN MBR. ISL has successfully designed and commissioned MBR wastewater technology to pharmaceutical wastewater at Morison Limited. (Sub group of HEMAS Holdings). Daily wastewater discharge from Morison facility is 80 m3/day and influent quality was attached here.
  • 9. MORISION. After the Anoxic tank, wastewater directed to the MBR system with aeration tank where the 99% of reduction COD reduction occurs. In aeration the MLSS is kept as 8000 mg/l.
  • 10. No Description Value Unit 1. Fat, Oil & Grease <10.0 mg/l 1. Total suspended solids (TSS) 200.00 mg/l 1. Turbidity 750 NTU 1. pH 4.5-6.0 1. Biological oxygen demand (BOD5) 100.00 mg/l 1. Chemical oxygen demand(COD) 1,500.00 mg/l 1. Electrical conductivity 1,000.00 袖s/cm 1. Total dissolved solids 650.00 mg/l 1. Sulphite 8.00 mg/l 1. Color range Yellow range 436 nm Red range 525 nm Blue range 620nm 20 14 12 m-1 m-1 m-1 Influent wastewater parameters
  • 11. ISL Successfully complied with the SLS 614:2013 standards using MBR technology. No Description Value Unit 1. Fat, Oil & Grease N/D mg/l 1. Total suspended solids (TSS) <1 mg/l 1. Turbidity <2 NTU 1. pH 7.0-8.5 - 1. Biological oxygen demand (BOD5) Nil mg/l 1. Chemical oxygen demand(COD) <10 mg/l 1. Electrical conductivity <250 袖s/cm 1. Total dissolved solids <150 mg/l Treated water parameters
  • 12. MBR DESIGN BASIS Design Flux 20 LMH So the required membrane area only for the filtration of membrane = 11103 / 20 瑞 = 550 2 Considering the backwash and CIP =2 m3 filtrate required per hour. Filtration pump minimum flow requirement - 13 m3/h
  • 13. CONTINUE.. Aeration required, COD loading per day 6000 g/m3 * (11*20) m3/day 1320 Kg COD /day O2 requirement per kg of COD - 1320 Kg COD /day * 1.1 kg O2/kg COD 1452 kg O2/day Required Air volumetric flow rate with OTE - 1452 2/ 1.2 /30.20.22060 = . / Actual Aeration Requirement By industrial standards = / = /
  • 14. SLUDGE GENERATION Daily Sludge Generation =ヰ, = = 8000 3 6203 30 = 165.33 / Daily Slurry Generation (98% Moisture) = 8266.5 kg/day. If we are going to use screw press for dewatering = 2 tons/day (Maximum).
  • 15. INFLUENT PARAMETERS Parameter Unit Value Condensate Flow rate m3/hr 11 Biological Oxygen Demand (BOD5) mg/l 500-600 Chemical Oxygen Demand (COD) mg/l 3000-6000 Total Dissolved Solids (TDS) mg/l 160-210 Electrical Conductivity at 25 oC 亮S/cm 300-320 Oil and grease mg/l 6-20 Dissolved Phosphates (as P) mg/l 4.5-5.5 Total Kjedahl Nitrogen ( as N) mg/l 140-160 Ammonical Nitrogen (as N) mg/l 60-75 Sulphide (as S) mg/l 6-7.6 Copper (as Cu) mg/l 0.015-0.025 Iron (as Fe) mg/l 0.6-0.9 Zinc (as Zn) mg/l 0.05-1.00 pH 3-3.2
  • 16. EXPECTED TREATED WATER QUALITY Parameter Unit Maximum desired value Total Suspended Solids (TDS) mg/l Max. 50 pH at ambient temperature - 6.5-8.5 Biochemical Oxygen Demand mg/l 30 Phenolic compounds (as C6H5OH) mg/l 1 Oil & Grease mg/l 6-20 Chemical Oxygen Demand (COD) mg/l 250 Dissolved phosphates (as P) mg/l 5 Total Kjedahl Nitrogen (as N) mg/l 140-160 Ammonical Nitrogen (as N) mg/l 50 Sulfide (as S) mg/l 2 Iron (Fe) mg/l 3 Copper (Cu) mg/l 3 Zinc (Zn) mg/l 2 Color Wavelength range Yellow range (436nm) Red range (525 nm) Blue range (620 nm) Max. absorption coefficient 7m-1 5m-1 3m-1