Partition control and point-by-point water inflow enhanced nitrogen and phosphorus removal (A/O/A)-MBR integrated process and system device thereof

Abstract

The invention discloses a partition control and point-by-point water inflow enhanced nitrogen and phosphorus removal (A / O / A)-MBR integrated process and a system thereof. A partition control and point-to-point water inlet operation mode is adopted, and the low C / N ratio domestic sewage is sequentially subjected to treatment processes comprising anaerobic phosphorus release treatment, aerobic phosphorus absorption and nitrification treatment, precipitation water outlet, denitrification nitrogen removal treatment and MBR nitrification and decarburization treatment according to the time sequence in a sewage treatment system. Partition control is carried out on the phosphorus removal process and the nitrogen removal process, space separation of phosphorus removal bacteria and nitrifying bacteria is achieved, the good growth environment of microorganisms in respective systems is guaranteed, and the problems of mud age contradiction, nitrate influence, complete separation of HRT and SRT and the like existing in a traditional process are solved; meanwhile, the problem of energy consumption of sewage treatment operation such as carbon source feeding is solved by adopting a point-by-point water inlet mode, and the purpose of efficient nitrogen and phosphorus removal is achieved. Meanwhile, the process has the advantages of good effluent quality, simple process, small occupied area, convenience in operation and the like.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a process and a system device for intensifying denitrification and dephosphorization of domestic sewage with a low C / N ratio. [0002] technical background [0003] The content of organic matter in sewage is a key factor affecting the effect of anaerobic phosphorus release and denitrification in the denitrification and phosphorus removal process. However, according to survey statistics, as many as 65% of sewage treatment plants have insufficient carbon sources, which leads to the inability to remove nitrogen and phosphorus elements in sewage well. In addition, since biological denitrification and phosphorus removal are carried out by two completely different types of bacteria, the biochemical processes are also completely different, and they have different requirements for environmental factors. The traditional process generally has problems such as the contrad...

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Problems solved by technology

[0007] The purpose of the present invention is to improve the traditional nitrogen and phosphorus removal process from the perspective of solving the problem of low carbon sources and realizing efficient nitrogen and phosphorus removal, and to provide a process for intensified nitrogen and phosphorus removal for domestic sewage with low C / N ratio. This process is a new process to improve the efficiency of simultaneous denitrification and phosphorus removal, which can realize stable and efficient nitrogen and phosphorus removal

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