Method for controlling or alleviating membrane pollution of membrane bioreactor by regulating operation condition
A technology of membrane bioreactor and operating conditions, which is applied in the direction of osmosis/dialysis water/sewage treatment, aerobic and anaerobic process treatment, etc. Bioreactor utilization efficiency and other issues, to achieve stable operation, increase sewage treatment capacity, and reduce the number of membrane cleaning times
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[0005] Specific embodiment 1: The method of this embodiment is realized by the following steps: 1. In the aerobic membrane bioreactor, the dissolved oxygen concentration is controlled to be 3 to 4 mg / L, the sludge concentration is 8000 to 10000 mg / L, and the hydraulic retention time is (HRT) 7-9 hours, the sludge retention time (SRT) 140-160d; 2. Add microorganisms to the anaerobic membrane bioreactor to control the temperature of the sewage in the anaerobic membrane bioreactor to 20-30°C, The pH value is 6.3 to 7.7; the added amount of the microorganisms is 8000 to 15000 mg / L, and the microorganisms are mainly facultative anaerobes and methanogens.
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[0006] Embodiment 2: In step one of this embodiment, the dissolved oxygen concentration is controlled to 3.5 mg / L in the aerobic membrane bioreactor. Others are the same as the first embodiment.
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[0007] Specific embodiment 3: In step one of this embodiment, the sludge concentration is controlled to 9000 mg / L in the aerobic membrane bioreactor. Others are the same as the first embodiment.
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