Three-compartment immersion type anaerobic film bioreactor

Abstract

The invention discloses a three-compartment immersed anaerobic membrane bioreactor, comprising a buffer chamber, an anaerobic reaction chamber and a membrane filter chamber. A first and a second partition boards are arranged between the anaerobic reaction chamber and the buffer chamber, the height of the first partition board is 3 / 4-4 / 5 of that of the buffer chamber, a passage is arranged under the second partition board, a third and a fourth partition boards are arranged between the anaerobic reaction chamber and the membrane filter chamber, the height of the fourth partition board is 3 / 4-4 / 5 of that of the membrane filter chamber, a second passage is arranged under the third partition board, the anaerobic reaction chamber is internally equipped with a methane aeration stirring device, a communicating pipe is arranged between the buffer chamber and the membrane filter chamber which is internally equipped with a membrane assembly, a water outlet pipe is connected with the upper portion of the membrane assembly, and the bottom portion of the membrane filter chamber is equipped with an exhaust pipe. The invention has high sewage water treatment effect and perfect quality of water outlet, and can wash the membrane assembly without affecting normal metabolism of sensitive anaerobic microorganisms, thereby guaranteeing the operational continuity and stability of the invention.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a submerged anaerobic membrane bioreactor. Background technique [0002] Wastewater biological treatment technology is widely used in urban wastewater and various industrial wastewater treatment, including aerobic biological method and anaerobic biological method. Among them, the aerobic biological treatment method is widely used in various wastewater treatment applications, but it has problems such as complex process, large floor area, large operating energy consumption, small sludge production and high operating costs, and is limited by the efficiency of oxygen mass transfer. It is not suitable for treating certain special industrial wastewater (such as wastewater with high concentration of refractory substances and organic matter). [0003] Compared with aerobic biological treatment, anaerobic treatment has the advantages of lower operating energy consumption and lo...

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Problems solved by technology

However, the occurrence of membrane fouling accompanying membrane filtration is unavoidable, so the membrane modules must be cleaned regularly. As far as the current cleaning methods are commonly used, whether the membrane modules are cleaned in a dedicated cleaning tank or on-line Backwashing the membrane modules will destroy the anaerobic reaction conditions in the reactor. Compared with the aerobic biological treatment process, the start-up process of the anaerobic reactor is very slow, generally taking 8-12 weeks, which will seriously affect the Engineering Practicability of Anaerobic Membrane Bioreactor

Therefore, the existing submerged anaerobic membrane bioreactor forms have great limitations

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