Heterotrophism nitration fungicide capable of realizing short nitration and application method thereof

Abstract

The invention relates to a heterotrophism nitration fungicide capable of realizing short nitration and an application method thereof. The fungicide takes heterotrophism nitrosobacteria as a main body,and takes NO2<->-N as a final nitration product. The fungicide is prepared according to ammonia concentration in actual sewage, and a reaction C / N ratio is 3. By adopting the technical scheme, the technical effect that short nitration can be realized is achieved, and the heterotrophism nitration fungicide can serve as a short denitrification pretreatment measure matching with a short denitrification or anaerobic ammonia oxidation processor measure for emergently providing the NO2<->-N.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a heterotrophic nitrifying bacteria agent capable of realizing short-range nitrification and its formula, which are suitable for long-term or emergency supply of electrons for short-range denitrification process or anaerobic ammonium oxidation (Anammox) process. Acceptor for nitrite nitrogen (NO 2 - -N). Background technique [0002] Nitrosification, or short-range nitrification, is a new denitrification process developed by Delft University in the Netherlands. Its principle is to control the nitrification process at the nitrite stage and terminate it, and then directly carry out denitrification denitrification or anaerobicammonium oxidation (anaerobicammonium oxidation, Anammox) provides NO 2 - -N as electron acceptor for oxidation of NH 4 + -N for denitrification. Compared with the whole nitrification-denitrification reaction pathway, the short-cut nitrification...

AI Technical Summary

Problems solved by technology

[0003] At present, the short-cut nitrification process adopts the method of enriching ammonia oxidizing bacteria (AOB) and inhibiting the growth of nitrous nitrogen oxidizing bacteria (NOB) to achieve NO. 2 - The accumulation of -N mainly has the following problems: (1) The method of using short sludge time (SRT) to selectively enrich AOB at high temperature and flush out NOB is only applicable to the situation of low sewage treatment volume, because high temperature requires consumes a lot of energy

(2) The inhibition of NOB activity by low dissolved oxygen (DO) will lead to low nitrogen removal rate. In addition, the system is in a low dissolved oxygen state for a long time, and the activated sludge is easy to disintegrate and expand filamentously.

(3) Although the way of using free ammonia (FA) to suppress NOB can obtain initial NO 2 - -N accumulates, but the effect cannot be maintained for a long time since NOB may gradually adapt to high FA concentration

In addition, FA can also inhibit Anammox bacteria, resulting in a decrease in the removal rate of the system

In addition, wastewater contains more or less a certain concentration of organic matter, which makes the growth of autotrophic AOB affected by heterotrophic bacteria