Sewage treatment system

Abstract

The invention discloses a sewage treatment system comprising a treatment tower body, a muddy water outlet, a muddy water outlet, a muddy water inlet, a clean water outlet and a biogas outlet, wherein an anaerobic fluidized bed reaction zone, a sludge settling zone and a membrane separation zone are sequentially defined in the treatment tower body from bottom to top; carrier particles attached with anaerobic microorganisms are contained in the anaerobic fluidized bed reaction zone which is provided with a vertical flow guide cylinder; a solid-liquid separator is arranged at the upper end of the flow guide cylinder; the membrane separation zone is provided with a rotary membrane component; the sewage inlet is formed in the lower part positioned on the side wall of the anaerobic fluidized bed reaction zone; the muddy water outlet is formed in the upper part positioned on the side wall of the anaerobic fluidized bed reaction zone; the muddy water inlet is formed in the lower part positioned on the side wall of the anaerobic fluidized bed reaction zone and is communicated with the flow guide cylinder; the clean water outlet is formed in a side wall positioned in the membrane separation zone; and the biogas outlet is formed in the top part positioned in the membrane separation zone. The system not only can realize purification of sewage but also can generate a lot of high-caloric-value biogas, and is compact in structure and low in running cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular, the invention relates to a sewage treatment system. Background technique [0002] With the development of sewage treatment technology so far, how to recycle the energy in sewage on the basis of ensuring the quality of effluent water has become the focus of current research. High-efficiency anaerobic biological technology for sewage treatment can not only realize sewage purification but also produce a large amount of high calorific value biogas to be used as energy, and has been widely developed and applied. However, the unstable operation of the reactor, difficulty in reaching the standard of effluent water quality, and low methane yield have become bottlenecks for the further popularization of this technology. [0003] Anaerobic membrane bioreactor technology (AnMBR) is a process that couples high-efficiency anaerobic biotechnology with membrane separation technology, an...

AI Technical Summary

Problems solved by technology

The existing anaerobic membrane bioreactor technology generally has disadvantages such as low water production, fast membrane fouling, and high energy consumption, which have become limiting factors affecting the popularization and application of MBR technology.

In order to reduce membrane fouling, methods such as biogas backflow aeration and increased cross-flow rate are usually used, but these methods will lead to increased energy consumption and increased operating costs. In addition, biogas contains a large amount of flammable and explosive gases, which poses a safety hazard. Hidden danger

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