Low carbon-nitrogen ratio domestic wastewater treatment system and method
A domestic waste water, low carbon-to-nitrogen ratio technology, applied in the direction of biological water/sewage treatment, water treatment parameter control, water/sewage multi-stage treatment, etc., can solve the problems of increased cost, secondary pollution, etc., to improve the purification effect, The effect of avoiding nitrogen and phosphorus enrichment and avoiding secondary pollution
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Embodiment 1
[0031] Such as figure 1 A low carbon-to-nitrogen ratio domestic wastewater treatment system shown is composed of a nitrification and denitrification reaction device, a UV-C ultraviolet disinfection device and a PLC controller 16, wherein the nitrification and denitrification reaction includes the first reaction tower 5, which is connected in sequence, The first water outlet pool 9, the second reaction tower 8 and the second water outlet pool 10, the first reaction tower 5 inlet is arranged on the top, the outlet is arranged on the bottom, the middle and lower part is provided with an aeration port 502, and the corresponding height position of the aeration port 502 is set There is a blower 7, and the inside of the first reaction tower 5 is also filled with gravel with a particle size of 8-10mm; the inlet of the second reaction tower 8 is set on the upper part, and the outlet is set on the lower part, and the inside is filled with gravel and activated sludge; the first reaction t...
Embodiment 2
[0036] Utilize the method for the system described in embodiment 1 to process low carbon nitrogen ratio domestic waste water, comprise the following steps:
[0037] (1) The waste water enters the filter tank after being precipitated by the Venturi jet through the primary clarifier. Under the action of the first peristaltic pump, the supernatant circulates through the first reaction tower at a rate of 1L / min, and the first reaction tower passes through the blower. Perform intermittent aeration at the aeration port. After 3 hours of aeration, stop the aeration, keep the first reaction tower working for 6 hours, control the water temperature at 17-21°C, and discharge the wastewater through the second peristaltic pump after fully contacting the filter bed for 3 hours. to the first outlet pool;
[0038] (2) Under the action of the third peristaltic pump, the waste water enters the second reaction tower at a rate of 5L / min. At the same time, the second water quality monitoring probe...
Embodiment 3
[0042] Adopt the treatment method described in embodiment 2 to process waste water example.
[0043] Wastewater to be treated is taken from: agricultural livestock and poultry breeding wastewater.
[0044] The result after processing according to the steps shown in Example 2 is shown in Table 1:
[0045] Table 1 Determination of physical and chemical parameters of water quality and the total number of microorganisms before and after purification by the device (inoculation of activated sludge)
[0046] index COD BOD 5
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