Automatic control device and method for achieving low-concentration ammonia-nitrogen wastewater short-range nitration

Abstract

The invention relates to an automatic control device and method for achieving low-concentration ammonia-nitrogen wastewater short-range nitration. The device is composed of the five parts of a short-range nitration reactor, a water inlet system, a water outlet system, a water bath circulating system and an automatic control system. An on-line monitoring device is adopted, according to the concentration of ammonia-nitrogen in the short-range nitration reactor, reasonable aeration is conducted, it is guaranteed that the activity of ammonia-oxidizing bacteria is not influenced, the short-range nitration efficiency is improved, and nitrite can also be prevented from being further oxidized into nitrate nitrogen; meanwhile, the hydraulic retention time of the short-range nitration reactor can beprecisely controlled, the occurrence that when the concentration of ammonia-nitrogen in outlet water is too low, requirements of an anaerobic ammonia-oxidizing matrix cannot be met is avoided, the possibility that when the hydraulic retention time is too long, nitrite is further oxidized into nitrate nitrogen can also be reduced to a certain degree, and it is also guaranteed that the pH value anddissolved oxygen of the short-range nitration reactor are in the optimal range.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to an automatic control device and method for realizing short-range nitrification. Background technique [0002] In recent years, in order to overcome the disadvantages of the traditional biological denitrification process, such as complex process, high energy consumption, inconvenient operation and management, and large amount of sludge generated, the new biological denitrification technology represented by short-cut nitrification-anammox has become an international water treatment technology. Deal with the hotspots and frontiers of research in the field. The short-range nitrification-anammox process is to oxidize half of the ammonia nitrogen in the water to nitrite nitrogen, and prevent it from being further oxidized to nitrate, and then directly use the nitrite nitrogen as the electron acceptor and the remaining ammonia nitrogen in the water as the electron ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem that the short-range nitrification of urban wastewater with low ammonia nitrogen concentration is difficult to realize at present, the present invention proposes a new automatic control device and method, which provides an effective process mode for realizing short-range nitrification of urban wastewater

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