Sewage treatment system and method for treating sewage by using same
A sewage treatment system and treatment method technology, which is applied in the direction of aerobic and anaerobic process treatment, can solve the problems of high energy consumption, large floor area, and low denitrification efficiency, and achieve low energy consumption and small footprint The effect of increasing the land area and improving the denitrification efficiency
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Embodiment 1 to 4
[0047] Embodiment 1 to 4 adopts following sewage treatment steps:
[0048] The above-mentioned sewage first passes through the grid, the regulating tank and the grit chamber, and then enters the sewage treatment system provided by the present invention.
[0049] In the sewage treatment device 100, the sewage and activated sludge are mixed to form a mixture at a weight ratio of 1:8;
[0050] The above-mentioned mixed materials respectively enter the first aerobic-facultative aeration tank 210 for aeration treatment to obtain aeration materials;
[0051] The above-mentioned aeration material enters the submerged membrane separation zone to separate the activated sludge from the purified water;
[0052] Among them, the dissolved oxygen in the aeration area is controlled at 0.2-0.4mg / L, and the concentration of activated sludge in the aeration tank is controlled at 8.0g / L. See Table 1 for the indicators of sewage and purified water obtained after treatment in Examples 1 to 5.
Embodiment 5 and 6
[0053] Embodiment 5 and 6 adopt following sewage treatment steps:
[0054] The sewage first passes through the grid, the adjustment tank and the coagulation sedimentation tank, and then enters the sewage treatment system provided by the invention.
[0055] In the sewage treatment device 100, the sewage and activated sludge are mixed to form a mixture in a weight ratio of 1:30;
[0056] The above-mentioned mixed materials respectively enter the first aerobic-facultative aeration tank 210 for aeration treatment to obtain aeration materials;
[0057] The above-mentioned aeration material enters the submerged membrane separation zone to separate the activated sludge from the purified water;
[0058] Among them, the dissolved oxygen in the aeration area is controlled at 0.2-0.4mg / L, the concentration of activated sludge in the aeration area is 8g / L, and the concentration of activated sludge in the membrane separation area is 10.0g / L. See Table 1 for the indicators of sewage and p...
Embodiment 7
[0060] The above-mentioned sewage first passes through the grid, the regulating tank and the grit chamber, and then enters the sewage treatment system provided by the present invention.
[0061] In the sewage treatment device 100, the sewage and activated sludge are mixed to form a mixture at a weight ratio of 1:8;
[0062] The above-mentioned mixed materials respectively enter the first aerobic-facultative aeration tank 210 for aeration treatment to obtain aeration materials;
[0063] The above-mentioned aeration material enters the submerged membrane separation zone to separate the activated sludge from the purified water;
[0064] Among them, the dissolved oxygen in the aeration zone is controlled at 0.2-0.4mg / L, the concentration of activated sludge in the aeration device 200 is 7.0g / L, and the concentration of activated sludge in the separation device 300 is 10.0g / L. The control is 8.0g / L. See Table 1 for the indicators of the sewage and the purified water obtained afte...
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Abstract
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