Two-phase anaerobic sewage treatment system

Abstract

The invention discloses a two-phase anaerobic sewage treatment system. The system comprises an anaerobic fluidized bed reaction zone, a sludge settlement zone and a membrane separation zone which are sequentially arranged from bottom to top and communicated with one another. The anaerobic fluidized bed reaction zone comprises an acidogenic phase reaction zone, an intermediate regulation phase reaction zone, a methanogenic phase reaction zone and a temperature control device, wherein the acidogenic phase reaction zone, the intermediate regulation phase reaction zone and the methanogenic phase reaction zone are sequentially communicated in parallel, and the temperature control device is used for controlling the temperature of each reaction zone. Each reaction zone includes carrier particles of anaerobes. The preponderant strain of the acidogenic phase reaction zone is acidogenic bacteria, and the preponderant strain of the methanogenic phase reaction zone is methanogenic bacteria. By means of the sewage treatment system, the methane yield in sewage treatment can be increased by utilizing the characteristics of the microbial action in different stages and the strain predominance, and the durability and pollution degree of rotating membrane modules can be monitored.

Description

technical field [0001] The invention relates to a sewage treatment system, in particular to a two-phase anaerobic sewage treatment system. Background technique [0002] After research, it was discovered that sewage contains huge energy, which has attracted widespread attention from all over the world. The production of sewage in both industrial and domestic areas is increasing day by day. Traditional sewage treatment technology cannot recover the energy in it, and the energy consumption is high, the operation is unstable, the purification efficiency is low, and the effluent quality is difficult to meet the reclaimed water standard. [0003] Although high-efficiency anaerobic biological technology can produce clean energy such as biogas, it cannot give full play to the advantages of bacteria and increase methane production rate, so that the energy contained in sewage cannot be better developed and utilized. [0004] Anaerobic membrane biotechnology has developed rapidly thi...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a two-phase anaerobic sewage treatment system, which solves the problems that existing anaerobic membrane bioreactors cannot reflect the degree of membrane pollution, and cannot improve the development and utilization of energy in sewage. The characteristics and dominance of bacteria in different stages improve the methane production rate of sewage treatment efficiency, and also monitor the durability and fouling degree of rotating membrane modules

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