Biological multiplication sewage treatment plant lowering denitrification carbon source demand and treatment method thereof

Abstract

The invention relates to a biological multiplication sewage treatment plant lowering denitrification carbon source demand and a treatment method thereof. The method comprises the following steps of allowing to-be-treated sewage to enter a circulation area from a sewage inlet tube, allowing the sewage to enter a lifting area from a bottom water inlet groove of the circulation area, uniformly distributing the to-be-treated sewage and pushing the to-be-treated sewage to an aeration area by the lifting area, performing combined bio-technology-based treatment on the sewage in the aeration area through a biological contact oxidation process, finally, separating sludge from clear water of sludge-water mixture flowing from the aeration area in a sludge-water separation area, thereby outputting andobtaining clear water, allowing at least a part of settled sludge to flow back to the circulation area, introducing air into water in the circulation area, oxidizing a part of ammonia and nitrogen insewage into nitrite, and oxidizing ammonia and nitrogen in sewage by the nitrite.

Description

technical field [0001] The technical field of sewage biological treatment of the present invention relates to a sewage biological treatment system in which a water intake area, a lifting area, an aeration area and a mud-water separation area are integrated in a treatment pool. Background technique [0002] Water resources are becoming more and more important in the development of society, and people are paying more and more attention to water treatment technology. Among them, sewage biological [0003] Processing technology has received extensive attention and has been continuously developed. [0004] A typical method in sewage biological treatment technology is the activated sludge method, which is based on the biological coagulation, adsorption and oxidation of activated sludge to decompose and remove organic pollutants in sewage (or called wastewater), and then make the sewage The sludge is separated from the water and the activated sludge can be recycled. In the activ...

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Problems solved by technology

For high concentrations of ammonia nitrogen (NH 3 -N) sewage (such as spandex wastewater, tannery wastewater, etc.), or when the ammonia nitrogen content in the front part of the aeration zone is relatively high, the denitrification effect is difficult to meet the standard

[0008] Moreover, the above-mentioned method disclosed in the prior art cannot fully utilize the carbon source in the raw water in the discharge requirements of the denitrification treatment, so that more carbon sources need to be supplemented; the cost of denitrification is also greatly increased, and further improvement is needed

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