MBBR (moving bed biofilm reactor) process suspended filler internal circulation system

Abstract

The invention discloses an MBBR (moving bed biofilm reactor) process suspended filler internal circulation system which comprises an internal circulation device, the internal circulation device comprises a shell, a cross plate is assembled in an inner cavity of the shell and divides the inner cavity of the shell into four cavities, the cavity at the upper left corner is a filler mixing pool, a water inlet is formed in the upper surface of the filler mixing pool, and a water outlet is formed in the lower surface of the filler mixing pool. The cavity at the upper right corner is a water outlet tank, a water outlet is formed in the upper surface of the water outlet tank, the other two cavities are MBBR tanks, two tubular screens are arranged in an inner cavity of the water outlet tank, one end of each tubular screen penetrates through the cross plate to be assembled with a circulating pump, and the other end of each tubular screen penetrates through the cross plate to be assembled with a non-return device. The phenomena that liquid drives the biological suspended filler to the tail end of the water outlet of the MBBR process device, the number of the filler at the tail end of the water outlet is increased, accumulation is caused in a severe case, and the liquid cannot normally pass through the reactor from an effluent intercepting device can be avoided.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an MBBR process suspension packing internal circulation system. Background technique [0002] The carrier fluidized bed moving bed biofilm reactor (MBBR process), the principle is to increase the biomass and biological species in the reactor by adding a certain amount of suspended carrier to the reactor, thereby improving the processing efficiency of the reactor. The density of the filler is close to that of water, so it is completely mixed with water during aeration. In addition, each carrier has different types inside and outside, and some anaerobic bacteria or facultative bacteria grow inside, and the environment for microbial growth is gas, liquid , Solid three-phase. The collision and shearing of the carrier in the water make the air bubbles smaller and increase the utilization rate of oxygen. The outside is good for bacteria, so that each carrier is a micro-reacto...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of internal circulation system of MBBR process suspension filler, to solve the existing MBBR process device proposed in the above-mentioned background technology. The carrying effect of the mixed liquid causes the liquid to drive the biological suspension filler to the end of the water outlet of the MBBR process device, resulting in an increase in the number of fillers at the end of the water outlet, and in severe cases, accumulation, and the problem that the liquid cannot pass through the reactor from the water outlet interception device normally

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