Internal circulation dynamic membrane bioreactor
A bioreactor and dynamic membrane technology, applied in the direction of sustainable biological treatment, aerobic process treatment, etc., can solve the problems of poor removal of pollutants, uneven mixing of activated sludge, and small cross-flow velocity of mixed liquid, etc., to achieve The effects of delaying membrane fouling, prolonging the backwash cycle, and increasing the cross-flow velocity
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[0011] Example 1
[0012] As shown in the drawings, the internal circulation dynamic membrane bioreactor of the present invention includes an outer cylinder body 2, an inner cylinder body 3, a membrane module 4, an aeration tube 8 and a backwash aeration tube 9. The lower end of the outer cylinder 2 is sealed, the upper end is open, and the lower part is provided with a water inlet 1. The upper and lower ends of the inner cylinder 3 are open and are installed in the outer cylinder 2, and the distance between the bottom end and the inner bottom surface of the outer cylinder 2 is 1 / 10 of the total height of the outer cylinder. The membrane module 4 is made of sieves and is set in the inner cylinder 3, the upper end of which is provided with a water outlet pipe 5 extending from the outer cylinder. The end of the water outlet pipe 5 is a water outlet 7, and a valve 6 is provided in front of the water outlet 7 . A backwash aeration pipe 9 is also connected to the water outlet pipe 5, a...
Example Embodiment
[0015] Example 2
[0016] The structure of the internal circulation dynamic membrane bioreactor is the same as that of Example 1. The MLSS of the reactor is 8000 mg / L, the DO is 2.0-4.0 mg / L, the influent COD is 500 mg / L, and the influent ammonia nitrogen is 80 mg / L. When the gas-water ratio is 40:1 during operation, the effluent COD is 28mg / L, the effluent ammonia nitrogen is 1.5mg / L, the effluent turbidity is 4NTU, and the backwash cycle of the reactor can be stabilized at 90h.
Example Embodiment
[0017] Example 3:
[0018] The structure of the internal circulation dynamic membrane bioreactor is the same as that of Example 1. The MLSS of the reactor is 8000 mg / L, the DO is 2.0-4.0 mg / L, the influent COD is 150 mg / L, and the influent ammonia nitrogen is 50 mg / L. When the gas-water ratio is 40:1 during operation, the effluent COD is 22mg / L, the effluent ammonia nitrogen is 1.0mg / L, the effluent turbidity is 4NTU, and the backwash cycle of the reactor can be stabilized at 90h.
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