Integrated shortcut nitrification-anaerobic ammonium oxidation process denitrogenation effect deterioration in-situ recovery method

Abstract

According to the present invention, based on the integrated shortcut nitrification-anaerobic ammonium oxidation combination process effect deterioration phenomenon caused by large breeding of nitrite oxidizing bacteria (NOB), the measure of combination of hydroxylamine or hydrazine pouring and sludge age control is used so as to quickly and efficiently achieve the in-situ recovery; and the recovery process is divided into two stages, wherein in the first stage, hydroxylamine or hydrazine and the like are poured to improve the activity and the abundance of ammonia oxidizing bacteria (AOB) and anammox while inhibit the NOB activity so as to rapidly reduce the NO3<->-N concentration in the combination process effluent, and in the second stage, the sludge age control is combined to gradually eliminate the NOB being in the inhibiting state out from the system so as to synchronically improve the NO2<->-N accumulation rate, the Anammox activity and the denitrification load in the combination process, and after running for a certain time, even if the pouring of the hydroxylamine or hydrazine and the like is stopped, the system can still maintain a stable denitrification effect, such that it is indicated that the successful recovery is achieved.

Description

technical field [0001] The invention relates to an in-situ recovery method for the deterioration of the denitrification effect of the integrated short-range nitrification-anammox process. By adding hydroxylamine or hydrazine, combined with sludge age control, the functional flora structure is rebuilt, and the integrated system is restored. The denitrification effect of the combined process of short-range nitrification and anaerobic ammonium oxidation belongs to the field of new biological denitrification technology. Background technique [0002] In my country's "Twelfth Five-Year Plan", the emission reduction indicators of ammonia nitrogen binding water pollutants are newly added. Therefore, various industries in our country are facing increasing pressure to reduce ammonia nitrogen emissions. Traditional nitrification / denitrification denitrification methods have disadvantages such as low denitrification efficiency, high energy and material consumption, and large amount of re...

AI Technical Summary

Problems solved by technology

Although some foreign scholars have pointed out that the only way to solve the massive proliferation of NOB is to re-inoculate the reactor with NOB-free seed sludge[Joss,A.,Derlon,N.,et al.Combined nitritation-anammox:advances in understanding process stability [J].Environmental science&technology,2011,45(22):9735-9742], but there are also examples showing that after re-inoculation, NOB will still multiply in the system, causing the denitrification effect to collapse again [Jardin, N., Hennerkes, J.Full-scale experience with the deammonification process to treat high strength sludge water-a case study[J].Water Science and Technology,2012,65(3):447-455]

Therefore, it is not feasible to solve the problem of NOB mass reproduction in the long-term operation of the integrated short-cut nitrification-ANAMMOX combined process by only re-inoculating the reactor, not to mention the current large-scale acquisition of anammox species worldwide. Mud is still a problem, mainly due to its own slow multiplication rate

However, no one has conducted research on the use of such intermediates to simultaneously promote the accumulation of nitrite and restore the activity of anammox bacteria to restore the denitrification effect of the integrated short-range nitrification-anammox combined process in situ

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