An integrated high-efficiency denitrification device and method for automatic sewage circulation

Abstract

The invention relates to a sewage automatic circulating integrated efficient denitrifying device which comprises a tank body, a settling tank and a reflux pipe. A filler region and an aerating region are arranged in the tank body. The device is characterized in that sludge inoculated with nitrosobacteria and anaerobic ammonium oxidation bacteria is arranged in the filler region; and the upper end of the reflux pipe is communicated with the aerating region, and the lower end of the reflux pipe is communicated with the low ends of the settling tank and the tank body. A denitrifying method provided by the invention comprises the following steps: a) sewage flowing in; b) aerating treatment; c) sewage refluxing; d) aerobic ammonia oxidation; e) anaerobic ammonia oxidation; and f) circulating treatment. According to the efficient denitrifying device and method provided by the invention, sewage can automatically circulate and flow in the aerating region, the settling tank and the filler region without additionally arranging circulating equipment, so that the cost is lowered; by means of joint action of nitrosobacteria on the surfaces of the filler and sludge and anaerobic ammonium oxidation bacteria in the filler and sludge, ammonia and nitrogen in the sewage are efficiently removed, and the device has the advantages of low energy consumption and high ammonia nitrogen removal efficiency.

Description

technical field [0001] The present invention relates to a denitrification device and method, more specifically, to a combination of aeration and oxygenation and nitrification-ANAMMOX denitrification process, and realizes the automatic circulation of sewage through gas power. Integrated high-efficiency denitrification device and method. Background technique [0002] Nitrogen is an important factor leading to water eutrophication and water environment pollution. Nitrogen exists in various forms in sewage, such as molecular nitrogen, organic nitrogen, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen, among which ammonia nitrogen is the most important. It is one of the forms of existence, and it is also the object of removal that environmental protection workers focus on researching. Traditional physical and chemical denitrification methods have high operating costs, difficult recycling, and easy to cause secondary pollution. Therefore, biological denitrification has bec...

AI Technical Summary

Problems solved by technology

Traditional physical and chemical denitrification methods have high operating costs, difficult recycling, and easy to cause secondary pollution. Therefore, biological denitrification has become a current hot research and application direction.

Among them, the anaerobic ammonium oxidation method has an excellent treatment effect on high-concentration ammonia-nitrogen wastewater, and stands out from many biological nitrogen removal methods. However, this method still has problems such as the inability to completely remove nitrogen and the long growth cycle of anammox bacteria.

[0003] For the treatment of high-concentration ammonia-nitrogen wastewater such as sludge digestate and wastewater from chemical fertilizer factories, the treatment effect of physicochemical method and anaerobic ammonium oxidation method will also be affected, and there will be situations such as low nitrogen removal efficiency.

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