Micro-aeration circulation integrated sewage biological ecological treatment system and method

Abstract

A micro-aeration circulation integrated sewage biological ecological treatment system and method. The domestic sewage is firstly homogenized and equalized by the regulating tank, and then sent to the surface water distribution biological filter, where it is acidified and hydrolyzed to reduce some organic matter, and then flows into the circulating biological Strengthen the contact tank for aerobic biochemical treatment to remove most of the organic matter, nitrification and denitrification denitrification, sludge aerobic phosphorus absorption and other biochemical effects, the effluent flows to the inclined plate sedimentation tank for solid-liquid separation, and the supernatant flows to the vertical The phosphorus pollutants in the wastewater are further adsorbed and removed by the iron-rich materials in the filter, and the effluent flows to the clear water tank for discharge or reuse. This system integrates the surface water-distributed biological filter, circulating bio-enhanced contact pool, and artificial wetland. The space layout of each reaction unit is compact and the floor area is small; the process uses less equipment, and the waste water mainly depends on gravity flow and propulsion. Flow, strong automation, easy operation and management; small sludge return flow, good nitrogen and phosphorus removal treatment effect, especially high phosphorus removal rate.

Description

technical field [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to a micro-aeration circulation integrated sewage biological ecological treatment technology. Background technique [0002] Most of the existing domestic wastewater is A / O, SBR, CASS, UASB and other activated sludge methods or their improved treatment technologies. On the one hand, these treatment technologies occupy a large area, and the operation and management are complicated. The process cannot take into account the treatment of nitrogen and phosphorus, and mainly relies on biological denitrification and chemical phosphorus removal, resulting in high operating costs. These defects directly restrict the wide application of activated sludge process in domestic sewage treatment. [0003] At present, there are no reports about the integrated treatment of domestic wastewater with surface-distributed biofilters, circulating bio-augmen...

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Problems solved by technology

[0002] Most of the existing domestic wastewater is A / O, SBR, CASS, UASB and other activated sludge methods or their improved treatment technologies. On the one hand, these treatment technologies occupy a large area, and the operation and management are complicated. The process cannot take into account the treatment of nitrogen and phosphorus, and mainly relies on biological denitrification and chemical phosphorus removal, resulting in high operating costs. These defects directly restrict the wide application of activated sludge process in domestic sewage treatment

[0003] At present, there is no report on the integrated treatment of domestic sewage surface water-distributed biofilter, circulating bio-augmented contact pool, vertical constructed wetland, etc., especially the simultaneous treatment of nitrogen and phosphorus.

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