MBBR and MBR coupling device and method

Abstract

The inveniton provides an MBBR and MBR coupling device and method. The device is divided into an upper layer and a lower layer, the MBBR and MBR coupling device comprises an MBBR unit on the upper layer and an MBR unit in the middle of the lower layer, and a sedimentation and sludge discharge unit is arranged on the periphery of the MBR unit; the MBBR unit and the MBR unit are separated through a partition plate, and a water passing hole is formed in the position, corresponding to the MBR unit, of the partition plate. The occupied area of the process is reduced, and the effluent quality is improved; meanwhile, the dissolved oxygen of the MBR aeration washing membrane component is used for the MBBR, so that the oxygen can be used for two purposes, and the energy consumption of process operation is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an MBBR and MBR coupling device and method. Background technique [0002] The moving bed biofilm reactor (MBBR) is a combined sewage treatment process. By adding a suspended carrier to the activated sludge, a biofilm is formed on the surface of the carrier, forming a sewage treatment process in which activated sludge and biofilm are coupled. The attached growth of microorganisms can reach a very high biomass, so the biological concentration in the reaction tank is several times that of the suspended growth activated sludge process. By increasing the biomass and biological species in the reactor, the treatment efficiency of the reactor is improved and the reduction footprint. At the same time, due to its long residence time, biofilm can enrich a large number of microorganisms with long generation time, such as ammonia oxidizing bacteria, which is beneficial to the remova...

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Problems solved by technology

However, there are technical defects in both methods. When the membrane module is built into the MBBR, the filler will collide and rub against the membrane module during the flow process, resulting in damage to the membrane module and affecting the service life of the membrane module; the MBR is installed as an independent unit in the Although the back end of MBBR can prevent the mechanical damage of the membrane modules, due to the existence of membrane fouling, the membrane surface needs to be washed by continuous aeration to increase the membrane effluent flux, which leads to high energy consumption in process operation

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