Aeration biological filter pool device and process for efficiently denitrifying and dephosphorizing

Abstract

The invention relates to an aeration biological filter pool device and a process for efficiently denitrifying and dephosphorizing in the sewage treatment and provides an aeration biological filter pool device for efficiently denitrifying and dephosphorizing. The aeration biological filter pool device comprises water feeding pumps which are connected and arrayed according to water feeding sequence, a synchronous denitrification dephosphorizing pool for synchronously denitrifying and dephosphorizing water from the water feeding pumps, a settling pond for settling the water from the synchronous denitrification dephosphorizing pool, an aeration biological filter pool water feeding pump and an aeration biological filter pool, wherein the synchronous denitrification dephosphorizing pool adopts a activated sludge process. The invention also provides an aeration biological filter pool process for efficiently denitrifying and dephosphorizing. The invention has the beneficial effects of solvingthe problems of complicated pretreatment, frequent back flush and insufficient utilization on a raw water carbon source of the conventional aeration biological filter pool, reducing the emission of carbon dioxide, improving the utilization rate of structures and reducing the occupied area and the cost by optimizing a process flow and being beneficial to wide application of the aeration biologicalfilter pool process.

Description

【Technical field】 [0001] The invention relates to sewage treatment, in particular to an aeration biological device and process for highly efficient denitrification and phosphorus removal in sewage treatment. 【Background technique】 [0002] Biological Aerated Filter (BAF) is a new sewage treatment process developed in the late 1980s and early 1990s on the basis of ordinary biological filters and referring to the water supply filter process. The biggest feature of the biological aerated filter is that it integrates biological oxidation and interception of suspended solids, saves the subsequent secondary sedimentation tank, and simplifies the treatment process on the premise of ensuring the treatment effect. [0003] However, the biological aerated filter process has high requirements on the quality of the influent water, especially the suspended solids (Suspended Substance, SS) in the water quality. Once the content of suspended solids in the influent water is too high, the fi...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the need for complex pretreatment in the existing technology, a large amount of carbon source needs to be added, and the utilization rate of raw water carbon source is low, which not only increases the operating cost, but also leads to a large increase in carbon dioxide emissions, requiring frequent backwashing to maintain The stable operation of the biological aerated filter requires additional structures, which increases the process steps and increases the cost. The present invention provides an aerated biological device and process for efficient nitrogen and phosphorus removal

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