Method for upgrading expansion biochemical pool on basis of MBBR technology

Abstract

The invention discloses a method for upgrading an expansion biochemical pool on the basis of MBBR technology and belongs to the field of sewage treatment. The expansion biochemical pool comprises an anaerobic zone, an MBBR mud film anoxic zone, an MBBR mud film aerobic zone and a decanting water draining zone, wherein a water feeding hole is formed in the anaerobic zone; the anaerobic zone communicates with the MBBR mud film anoxic zone through a through hole at the bottom of a first zone separating wall; a suspension carrier is added into the MBBR mud film anoxic zone; another suspension carrier is added into the MBBR film mud aerobic zone; the MBBR mud film aerobic zone communicates with the MBBR mud film anoxic zone through a front intercepting screen; a penetrated aerator pipe is arranged in the MBBR mud film aerobic zone; the MBBR mud film aerobic zone communicates with the decanting water draining zone through a rear intercepting screen; the decanting water draining zone communicates with the anaerobic zone and the MBBR mud film anoxic zone through a water draining pipeline of a nitration liquid reflux pump. According to the invention, on the basis of keeping the running modeof an original CAST biochemical pool, the MBBR technology is adopted for rezoning transformation, so that the nitrogen and phosphorus removal capacity of the original CAST biochemical pool is promoted.

Description

technical field [0001] The invention relates to a method for upgrading and expanding a biochemical pool based on an MBBR process. Background technique [0002] According to our country's requirements for river basin environmental governance, the intensity of advanced treatment and upgrading of urban and industrial sewage treatment plants has been further strengthened. Sewage plants with a large number of CAST processes are required to meet the A standard of the first-level standard of the "Pollutant Discharge Standard for Urban Wastewater Treatment Plants" (GB18918-2002), and even require higher standards, but due to the special land occupation and CAST process operation mode nature, the upcycling approach challenges its economics and technicality. [0003] A large number of industrial and municipal sewage treatment plants that have been in operation at home and abroad have adopted the CAST (or CASS) biological pool sewage treatment process. The CAST biological treatment po...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the CAST biochemical pool upgrading and transformation technology of the above-mentioned existing CAST process, to overcome the defects of insufficient deep denitrification treatment effect of the CAST process, the purpose of the present invention is to provide a method for upgrading and expanding biochemical pools based on the MBBR process. Upgrade the effluent quality of the biochemical pool or expand the treatment scale to improve the efficiency of sewage treatment

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