Synchronous high-efficiency biological phosphorus removing and reclaiming system and method based on activated sludge process

Abstract

The invention relates to a synchronous high-efficiency biological phosphorus removing and reclaiming method based on an activated sludge process. The system comprises an aeration tank and a sedimentation tank, which are communicated with an intake pipeline, wherein an aeration device is arranged in the aeration tank; the aeration tank is communicated with the sedimentation tank through the sewage pipeline; an effluent drainage pipeline for discharging supernate is arranged on the sedimentation tank. The system is characterized in that an unused reflux sludge storage drum, a sewage-sludge mixing drum, a primary sedimentation device, a phosphorus reclaiming reaction drum and a secondary sedimentation device are sequentially communicated with the bottom of the sedimentation tank. Compared with the prior art, the treatment system and method provided by the invention aim to overcome the defect of an existing activated sludge biological phosphorus removal system, are used for reclaiming phosphorus while an activated sludge system synchronously removes phosphorus with high efficiency on the basis of single-stage aerobic biological phosphorus removal, and are capable of effectively enriching phosphorus accumulation microorganisms. Working in a continuous flow mode, the system is small in investment, stable in effluent quality and high in phosphorus reclaiming quantity, can be used for lowering the effluent phosphorus concentration of an existing activated sludge system effectively and reclaiming precious phosphorus resources, and is suitable for transformation of a traditional activated sludge process.

Description

technical field [0001] The invention relates to the field of waste water treatment, and specifically refers to a system and method for synchronously realizing high-efficiency biological phosphorus removal and phosphorus recovery by an activated sludge process. Background technique [0002] Phosphorus is an essential nutrient element for organisms, but excessive phosphorus content in water bodies will cause eutrophication of water bodies. Eutrophication leads to deterioration of water quality and makes it difficult to treat drinking water. As a result, the concentration of dissolved oxygen in the water body decreases due to algae covering the water surface. The swimming value and ornamental value of the water body are lost; the domestic water is affected. At the same time, it also causes the water quality of the water body to fail to meet the water quality requirements of industrial cooling water and process water, and even causes the cooling facilities to block and fail, af...

AI Technical Summary

Problems solved by technology

However, the traditional activated sludge method cannot effectively enrich phosphorus-accumulating microorganisms because there is no alternating anaerobic / aerobic operating environment.

Therefore, a major disadvantage of the traditional activated sludge method is that the sewage cannot achieve efficient biological phosphorus removal.

On the one hand, this makes the phosphorus content in the effluent higher, polluting natural water bodies; on the other hand, it causes a large amount of waste of phosphorus resources in the sewage

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