Integrated wastewater denitrification device and wastewater denitrification method

Abstract

The invention provides an integrated wastewater denitrification device and a wastewater denitrification method. The device is simple in structure and high in stability and restoration performance. A reactor main body adopts nitrobacteria and low-activity flocculent anaerobic ammoxidation sludge; the growth and the activity of the nitrobacteria can be selectively inhibited in a manner of adding hydroxylamine and / or hydrazine at a certain concentration intermittently for a long time; meanwhile, the activity of ammoxidation bacteria and anaerobic ammoxidation bacteria can be improved; a reactor adopts an operating manner of a sequencing batch reactor; supplied water with high concentration of ammonia nitrogen can be diluted in a manner of adjusting a water discharging ratio, so that the concentration of a substrate in the reactor is in a proper range; the inhibition on partial nitrification and anaerobic ammoxidation can be avoided; the phenomenon that nitrate is accumulated can be relieved; the denitrification effect of the reactor can be rapidly restored.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an integrated wastewater denitrification device and a wastewater denitrification method. Background technique [0002] Nitrogen pollution will cause eutrophication of water bodies, and with the rapid development of urbanization and industrialization in my country, this problem has become increasingly serious and has caused many public environmental safety incidents. For this reason, in recent years, the state has successively promulgated and implemented new sewage discharge standards, among which the discharge requirements for ammonia nitrogen have been particularly improved, and the total nitrogen in the effluent has been limited for the first time. At the same time, ammonia nitrogen has become a new total control indicator in the national "Twelfth Five-Year Plan". However, there are still a large number of problems in my country such as anaerobic digestion superna...

AI Technical Summary

Problems solved by technology

However, when operating the integrated reactor, it is necessary to selectively cultivate the ammonia oxidizing bacteria and anammox bacteria in the reactor, and at the same time inhibit the nitrifying bacteria; on the other hand, in practical applications, unstable water inflow often causes Reactor fluctuations, thereby inhibiting the reactor, therefore, the resilience of the reactor is also important

[0004] To sum up, the existing anammox-based denitrification reactors have their own advantages, but also have their own shortcomings; in order to realize the long-term stable operation of the anammox process under high load and high influent concentration Strong resilience, needs further improvement

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