External anaerobic membrane bioreactor

Abstract

The invention discloses an external anaerobic membrane bioreactor, which comprises a regulating tank, an anaerobic bioreactor and a membrane case. A water distribution pipe is arranged at the bottom of the anaerobic bioreactor, a three-phase separator is mounted on the upper portion of the anaerobic bioreactor, a sludge circulating pump communicated with the anaerobic bioreactor is disposed outside the same, a micro-porous aerating device is arranged at the bottom of the membrane case, and an ultrafiltration bundle membrane component is mounted in the membrane case. The regulating tank is connected with the water distribution pipe through the anaerobic bioreactor, a water outlet pipe of the anaerobic bioreactor is connected with a water inlet pipe on the upper portion of the membrane case, and a sewage pipe on the lower portion of the membrane case is communicated with the water distribution pipe of the anaerobic bioreactor. By means of the reactor, sludge can be prevented from running away, sludge age can be prolonged, and enrichment of microorganisms is facilitated. Membrane contamination can be effectively alleviated by means of nitrogen flushing, and accordingly service cycle of the membrane component is prolonged, cost for cleaning the membrane component is saved, and secondary pollution caused during cleaning is avoided. The external anaerobic membrane bioreactor is simple in structure, easy to operate and applicable to treatment of high-concentration organic wastewater.

Description

technical field [0001] The invention relates to an external anaerobic membrane bioreactor, which is suitable for the treatment of high-concentration organic wastewater. Background technique [0002] Membrane bioreactor (MBR) combines membrane separation technology with biological treatment technology. While effectively removing pollutants, it also traps biomass in the reactor, overcoming the phenomenon of biomass loss in traditional biological treatment technology. . According to different types of bioreactors, MBR can be divided into aerobic MBR and anaerobic MBR. Among them, aerobic MBR is mainly used in municipal wastewater and other wastewater with low organic load and high biodegradability, while for industrial wastewater with high organic load Waste water is difficult to use due to the high cost of its aeration process. In contrast, anaerobic MBR is more suitable for the treatment of high-concentration organic wastewater due to its lower energy consumption. Generall...

AI Technical Summary

Problems solved by technology

Generally speaking, an anaerobic MBR reactor is composed of a bioreactor and an external membrane module. Due to the high concentration of sludge in the anaerobic bioreactor, the surface of the membrane module is easy to accumulate sludge during long-term operation, resulting in membrane fouling. , so that the MBR treatment effect is reduced. At the same time, chemicals are often used in the process of cleaning membrane fouling, which is easy to cause secondary pollution

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