Integrated expanded granular sludge bed-membrane bioreactor whole-course autotrophy denitrification device and process thereof

A whole-process autotrophic denitrification and expanded granular sludge technology, applied in the field of environmental engineering, can solve problems such as insufficient to meet the mitigation of membrane fouling, and achieve the effects of shortening doubling time, alleviating membrane fouling, and effective combination

Active Publication Date: 2014-08-13
DALIAN UNIV OF TECH
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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.

Method used

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  • Integrated expanded granular sludge bed-membrane bioreactor whole-course autotrophy denitrification device and process thereof

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Embodiment Construction

[0014] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0015] (1) Nitrogen-containing sewage (waste) water is firstly placed in the inlet well, and the temperature and pH of the inlet water are adjusted according to the feedback of the temperature and pH value in the reactor, so that the temperature and pH in the reactor are kept at 15-40°C, respectively. Between 6-9, preferably between 30-35°C, 8.0-8.5;

[0016] (2) Subsequently, the sewage (waste) water in the water inlet well is pumped into the reactor 1 through the water pump 8 through the water inlet provided at the bottom of the reactor. Along with the dissolved oxygen in the return water, part or half of the ammonia nitrogen in the influent water is first converted to nitrite nitrogen by the aerobic ammonia oxidizing bacteria on the surface of the granular sludge. Then the remaining ammonia nitrogen in the influ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30
Inventor 杨凤林李子音徐晓晨邵冰
Owner DALIAN UNIV OF TECH
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