High-standard effluent sewage treatment process with low operation cost

Abstract

The invention relates to the technical field of MBBR (Moving Bed Biofilm Reactor) sewage treatment, and discloses a high-standard effluent process with low operation cost. The process comprises an anaerobic phosphorus release area, a static settling area, a phosphorus removal flocculation reaction area, a phosphorus removal settling area, a denitrification phosphorus removal anoxic area, a denitrification nitrogen removal anoxic area, a phosphorus uptake nitrification aerobic area, a primary settling area, a nitrification aerobic (carrier) area, a denitrification oxygen elimination (carrier) area, a secondary settling area, a quartz sand filtering area, a water outlet area and a disinfection area which are sequentially connected from front to back, the problems that a traditional sewage plant wastes a carbon source and the treatment cost is increased due to manual addition of the carbon source in the later stage are solved; the total phosphorus in the supernatant with higher phosphorus concentration generated by phosphorus release of phosphorus release bacteria in an anaerobic zone is removed through side-flow dosing precipitation, so that the probability that the total phosphorus in the effluent is not up to the standard due to entering a subsequent treatment structure is avoided; and the influence of excessive medicament and nitrate nitrogen on the phosphorus release and phosphorus absorption capacity of the phosphorus release bacteria is avoided.

Description

technical field [0001] The invention relates to the technical field of MBBR sewage treatment, in particular to a process for treating effluent sewage with low operating costs and high standards. Background technique [0002] As the country raises the discharge standards of sewage treatment plants, it is imminent to upgrade and transform the existing sewage treatment plants. However, the common problem encountered in the upgrading and transformation is that the total nitrogen reaches the standard. At the same time, when the total nitrogen reaches the standard, How to achieve the simultaneous compliance of other indicators in the most economical way? Conventional sewage treatment plant denitrification and phosphorus removal process has been difficult to meet the current water quality requirements, and the traditional secondary treatment process of sewage treatment plant has low volume load and occupies an area large area. [0003] Using the MBBR (Moving Bed Biofilm Reactor, m...

AI Technical Summary

Problems solved by technology

In addition, MBBR also has the advantages of low land occupation, low infrastructure costs, and flexible and simple transformation and construction. At present, the new round of upgrading and transformation focuses on phosphorus and nitrogen removal. Biological phosphorus and nitrogen removal is an economical way. COD has become a valuable carbon source for phosphorus and nitrogen removal, and most municipal sewage plants add additional carbon sources for phosphorus and nitrogen removal, resulting in a significant increase in treatment costs

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