Integrated expanded granular sludge bed-membrane bioreactor full autotrophic denitrification device and its process

Abstract

The invention belongs to the field of environmental engineering, which relates to an integrated expanded granular sludge bed-membrane bioreactor whole-course autotrophy denitrification device and a process thereof. The device comprises a reactor main body, an air / liquid separation tank, a three-phase separation device, a membrane assembly, an air pump, an air flow meter, a perforated aeration pipe, a water feeding pump, a reflux pump, a water discharging pump and the like, wherein the reactor main body is divided into two function regions, i.e., a lower whole-course autotrophy denitrification function region and an upper membrane filtration function region, wherein an air aeration mode is adopted by the bottom of the immersion-type membrane assembly in the upper membrane filtration function region; the upper part of the reactor is externally connected with the air / liquid separation tank; the reflux system is used for refluxing heavy-oxygen-enriched water in the tank to a water inlet in the bottom of the reactor so as to provide the necessary dissolved oxygen for the whole-course autotrophy denitrification function region; and the fed sewage is firstly denitrified by the whole-course autotrophy denitrification function region and then filtered by the membrane so as to obtain the clean discharging water. The integrated reactor is small in land occupation. The whole-course autotrophy denitrification process is simple and convenient to operate.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and relates to an integrated expanded granular sludge bed-membrane bioreactor full-process autotrophic denitrification device and a process thereof. Background technique [0002] In recent years, the problem of nitrogen pollution in water bodies has become increasingly serious. The traditional nitrification / denitrification biological denitrification process has the disadvantages of many equipment, long process, high infrastructure investment, high energy consumption, high material consumption, etc., which can no longer meet the requirements of today's society on the road of sustainable development. Now, people urgently need a better and more effective biological nitrogen removal process. [0003] The anaerobic ammonium oxidation process can achieve complete autotrophic denitrification without additional carbon source, greatly reduce aeration and sludge production, and avoid carbon dioxid...

AI Technical Summary

Problems solved by technology

The condition required for the whole autotrophic denitrification process is the oxygen limit condition, which is not enough to alleviate membrane fouling.

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