System and method for realizing stable operation of short-cut nitrification-anaerobic ammonia oxidation denitrification of low-ammonia-nitrogen wastewater

Abstract

The invention discloses a system and a method for realizing the stable operation of short-cut nitrification-anaerobic ammonia oxidation denitrification of low-ammonia-nitrogen wastewater. The system comprises a low-ammonia-nitrogen wastewater inlet device, a continuous flow A / O device, a continuous flow integrated short-cut nitrification-anaerobic ammonia oxidation denitrification device and a side diamine inhibition NOB device. The method comprises the following steps: the device is inoculated with an anaerobic ammonia oxidation biofilm filler and short-cut nitrification flocculent sludge; sewage enters the continuous flow A / O device, effluent enters the continuous flow integrated short-cut nitrification-anaerobic ammonia oxidation denitrification device, when the side diamine inhibitionNOB device needs to be started, flocculent sludge is discharged into a side diamine inhibition NOB tank, liquid caustic soda and a diamine solution are dropwise added, and NOB in the flocculent sludgeis inhibited; and at a low temperature, the activity of anaerobic ammonia oxidizing bacteria is improved by utilizing a diamine solution. After the treatment, the effluent quality reaches the first-grade A emission standard, and the device can stably maintain running for more than 200 days.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and more specifically relates to a system and method for realizing the stable operation of short-range nitrification-anammox denitrification of low-ammonia nitrogen wastewater. Background technique [0002] The problem of water eutrophication caused by excessive discharge of nitrogen and phosphorus is becoming more and more serious in contemporary society, which has aroused great concern of the society on water environment pollution. At present, phosphorus in sewage can be efficiently removed by chemical methods, while nitrogen removal is mainly by biological methods. The traditional nitrification-denitrification biological denitrification process has high costs for aeration and external carbon sources, and it is difficult to meet the increasingly stringent pollutant discharge standards. Denitrification has become one of the difficulties in the sewage treatment industry. The ...

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Problems solved by technology

[0004] The existing methods to realize short-range nitrification of urban sewage mainly include: FA inhibition, FNA inhibition, low DO, intermittent aeration, control of sludge age, starvation treatment, etc. The above methods can realize short-range nitrification of urban sewage, but it is difficult to achieve short-range nitrification stability Maintenance and operation process is complicated

At the same time, factors such as low temperature, low substrate concentration, difficulty in the retention of anammox bacteria, and slow proliferation of anammox bacteria in urban sewage lead to low abundance of anammox bacteria and low removal load in urban sewage. A fast, effective, economical and simple method to realize the stable operation of short-cut nitrification-anammox in urban sewage

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