MBR flat membrane process system

Abstract

The invention discloses an MBR flat membrane process system. The MBR flat membrane process system adopts the following steps that: after being subjected to dehardening and filtering in a previous stage, sewage flows into a softening pool; a flocculating agent is added; a PH value in a hydrolyzing pool is regulated, and aerobic bacteria, facultative bacteria and anaerobe are added into the hydrolyzing pool; sludge concentration is controlled; a hydrolyzing and acidifying reaction is performed; and the sewage flows into an aerobic tank (an MBR membrane pool) to be processed after being subjectedto hydrolyzing treatment. According to the MBR flat membrane process system, products in the hydrolyzing and acid producing stage, products mainly are small molecule organisms, so that biodegradability is improved, and reaction time and processing energy consumption are reduced; degradation on solid organisms can reduce a sludge quantity and can implement sewage and sludge one-time treatment; a closed pool is not required, and a water-gas-solid three-phase separator is not required, thereby reducing cost and facilitating maintenance; before the reaction is controlled to be completed in a second stage, effluent has no objectionable odor caused by anaerobic fermentation, so that the environment of a treatment plant is improved; and the reactions in the first and second stages are rapid, andthus, the hydrolyzing pool is small in volume and equivalent to a primary sedimentation tank, so that investment of capital construction is saved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an MBR flat membrane process system. Background technique [0002] Sewage biochemical treatment belongs to the secondary treatment, with the main purpose of removing unsinkable suspended solids and soluble biodegradable organic matter. , A / O method, SBR method, oxidation ditch method) stabilization pond method, land treatment method and other treatment methods. At present, most urban sewage treatment plants use activated sludge method, and small cities generally use CRI method (artificial Quick osmosis system), in addition, there are some other methods in industrial wastewater. The principle of biological treatment is to complete the decomposition of organic matter and the synthesis of organisms through biological action, especially the action of microorganisms, and transform organic pollutants into harmless The gaseous product (CO2), liquid product (water) and solid pr...

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Problems solved by technology

[0002] Sewage biochemical treatment belongs to the secondary treatment, with the main purpose of removing unsinkable suspended solids and soluble biodegradable organic matter. , A / O method, SBR method, oxidation ditch method) stabilization pond method, land treatment method and other treatment methods. At present, most urban sewage treatment plants use activated sludge method, and small cities generally use CRI method (artificial Quick osmosis system), in addition, there are some other methods in industrial wastewater. The principle of biological treatment is to complete the decomposition of organic matter and the synthesis of organisms through biological action, especially the action of microorganisms, and transform organic pollutants into harmless The gaseous product (CO2), liquid product (water) and solid product rich in organic matter (microbial group or biological sludge); the excess biological sludge is separated from the solid and liquid in the sedimentation tank by the sedimentation tank, from the purified sewage The purpose of the hydrolysis (acidification) section in the hydrolysis (acidification) + aerobic (MBR membrane) treatment system is to convert the difficult-to-biodegradable substances into easily biodegradable substances in the treatment of industrial wastewater and improve the waste water. Biochemical, to facilitate subsequent aerobic biological treatment, the dominant flora in the hydrolysis process is anaerobic microorganisms, mainly facultative microorganisms, the current sewage biochemical process not only has a long reaction time, high energy consumption for treatment, but also cannot achieve The one-time treatment of sewage and sludge is expensive and increases the cost, so now a MBR flat membrane process system is designed to solve the above problems