Multi-cycle self-backflow small living sewage treatment system with denitrification function

Abstract

The invention discloses a multi-cycle self-backflow small living sewage treatment system with a denitrification function. The system is composed of a water yield adjusting area, a biochemical treatment area and a settling area. A lifting pump is arranged in the water yield adjusting area to lift sewage to be treated to one end of the biochemical treatment area. An aerating apparatus and biochemical reaction filler are installed in the biochemical treatment area. A backflow device is arranged on the pond wall between the other end of the biochemical treatment area and the water yield adjusting area, and after the backflow device is started, sewage subjected to a biochemical reaction can flow back into the water yield adjusting area. An effluent weir is arranged on the pond wall between the other end of the biochemical treatment area and the settling area. A sufficient circular reaction of sewage can be achieved due to the design of the height difference of the bottom of the crest of the effluent weir and the bottom of the crest of a backflow weir, the pollution load impact is the smallest, and the sewage treatment efficiency is highest. The system is applicable to small-yield sewage treatment, and particularly suitable for non-uniform inflowing sewage treatment conditions with the denitrification requirement. Impact of the instantaneous water inflowing pollution load on the system is small, the ammonium-nitrogen removal rate is high, and the sewage treatment efficiency is high.

Description

technical field [0001] The invention relates to a small-scale domestic sewage treatment system, in particular to a multi-cycle self-reflux small-scale domestic sewage treatment system with denitrification function. Background technique [0002] Most of the existing small-scale sewage treatment systems cannot realize the treatment of aerobic and hypoxic two links, or only use two links for treatment but cannot be recycled. For example, the patent application number CN201510151759 proposes a Small and medium-sized sewage treatment integrated device, including sequentially connected biochemical treatment unit, sedimentation and sludge return unit, photocatalytic oxidation unit, advanced treatment unit, and disinfection unit; patent application number CN201520071877 proposes a small sewage treatment device , including comprehensive adjustment tank, contact oxidation tank, biological aerated filter tank, filter tank and automatic control module; patent application number CN201420...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing small-scale sewage treatment systems cannot realize the treatment of aerobic and hypoxic two links, or only use two links for treatment but cannot be recycled. For example, the patent application number CN201510151759 proposes a Small and medium-sized sewage treatment integrated device, including sequentially connected biochemical treatment unit, sedimentation and sludge return unit, photocatalytic oxidation unit, advanced treatment unit, and disinfection unit; patent application number CN201520071877 proposes a small sewage treatment device , including comprehensive adjustment tank, contact oxidation tank, biological aerated filter tank, filter tank and automatic control module; patent application number CN201420766937 A small sewage treatment system, including adjustment tank, anaerobic fermentation tank, biological contact oxidation tank, sludge pools and disinfection pools; these patents can only perform one-time aerobic and anoxic treatment of sewage, and the treatment effect is relatively limited. problem

[0003] Some small-scale sewage treatment systems can also realize the alternate treatment of aerobic and anoxic links, but they do not reprocess the water flow through circulation, so the number of treatments is limited, and as the number of treatments increases, the equipment occupies an area The area is getting bigger and bigger, and the energy consumption is getting higher and higher. For example, the patent application number CN201510048460 proposes a multi-step anoxic-aerobic bioreactor and its control method. Oxygen-aerobic process enables sewage to pass through multiple pool cells sequentially so that it can be alternately aerobic and anoxic to improve the removal of pollutants. This can certainly improve the sewage treatment effect, but due to multiple pool cells Undoubtedly, the use of the treatment facility will occupy a large area, and multiple water pumps have to be used to extract sewage, which is not suitable for integrated production, and the energy consumption of the equipment is relatively large

[0004] In terms of how to stabilize the water flow, the prior art generally does not consider the design of the weir opening, but for example, in the patent application number CN201520109555, although for the design of the weir opening, it is proposed that the upper edge of the edge of the drainage groove is evenly spaced along the length direction of the edge. There are several triangular plates to solve the problem of uneven water flow in the process of discharging the treated sewage in the existing small sewage treatment equipment

[0005] To sum up, the existing small-scale domestic sewage treatment system basically cannot realize the treatment of aerobic and anoxic two links alternately, or only generally uses two links for treatment but cannot be recycled and reprocessed, so that the treatment equipment occupies a lot of space Large size, low processing efficiency, excessive energy consumption, etc.

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