High-efficiency short-range nitration method

Abstract

The invention discloses a high-efficiency short-range nitration method, which comprises the following steps of: oxidizing part of or all ammonia nitrogen in liquid to form nitritenitrogen under the action of autotrophic bacteria in a nitration pond; sedimentating a mud and water mixture which flows out of the nitration pond in a sedimentation pond; after solid-liquid separation is performed, allowing effluent to enter a denitrification pond and sludge to enter the nitration pond by using a circulating pump; arranging a regulating pond in front of the nitration pond, arranging an ammonia nitrogen on-line measuring device in the regulating pond, and regulating the flow of a water inlet pump and the circulating pump automatically according to a measuring value of the ammonia nitrogen on-linemeasuring device; arranging a pH meter in a nitration tank, and adding alkaline liquor automatically according to the measuring value of the pH meter; and arranging a dissolved oxygen (DO) on-line analysis meter in the nitration tank to regulate air flow and maintain appropriate dissolved oxygen. The high-efficiency short-range nitration method has the advantages of low investment operating cost and the like, is stably operated and is convenient to manage.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a high-efficiency short-range nitrification method. Background technique [0002] Both the short-cut nitrification and denitrification process and the anammox process are based on the premise of stable and efficient short-cut nitrification. Short-cut nitrification means that the nitrification reaction stays in the nitrite nitrogen stage. A stable and efficient short-cut nitrification process has always been a difficult point in the denitrification process. Due to the existence of nitrous nitrogen oxidizing bacteria, in order to maintain favorable growth conditions for ammonia oxidizing bacteria, it is necessary to control parameters such as temperature, free ammonia nitrogen, and dissolved oxygen (DO) to reduce or even avoid the formation of nitrate nitrogen. DO control is considered the most effective means, but this control method will largely affect the hydraulic flow conditions i...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a stable and efficient short-range nitrification method, which can automatically adjust the ratio of nitrite nitrogen and ammonia nitrogen in the effluent water through automatic control, and overcome the deterioration of the hydraulic conditions in the pool and the water inflow caused by the adjustment of the air volume. The imbalance of the ratio of nitrite nitrogen and ammonia nitrogen in the effluent caused by the change of ammonia nitrogen concentration

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