Device and method for quick start and stable maintenance of short-cut nitrification/ANAMMOX integration based on hydroxylamine

Abstract

The short-range nitrification / anammox integration device and method based on quick start and stable maintenance of hydroxylamine belong to the field of biological treatment of urban domestic sewage. For the short-cut nitrification / anammox integrated process, the stable operation of short-cut nitrification and the matching anammox bacteria activity are very important, but it is difficult to quickly start and stably maintain the city by only controlling the process parameters For short-range nitrification / anammox operation of sewage, this patent can achieve the effect of inhibiting the activity of nitrite oxidizing bacteria and improving the activity of anammox by adding hydroxylamine (HA), and start the integration in a short period of time The short-cut nitrification / anammox reactor maintains a good treatment effect. Compared with the traditional nitrification-denitrification denitrification process, the short-cut nitrification / anammox integrated process saves aeration, reduces sludge production, and saves carbon sources, especially suitable for low C / N urban domestic sewage.

Description

technical field [0001] The device and method related to the short-range nitrification / anammox integration based on hydroxylamine quick start and stable maintenance of the present invention belong to the field of sewage biological treatment, and are especially suitable for denitrification of urban domestic sewage with low C / N. Background technique [0002] In recent years, the breakthrough research in the field of sewage treatment is the discovery of anaerobic ammonium oxidation (anammox) process. In the process of anaerobic ammonium oxidation, ammonia nitrogen and nitrite nitrogen react in anaerobic environment to generate nitrogen gas, in which nitrite nitrogen provides electrons for the oxidation of ammonia nitrogen. Its reaction formula is: [0003] [0004] Compared with the traditional nitrification / denitrification process, ANAMMOX denitrification technology has three advantages: (1) saving 60% of aeration; (2) saving 100% of organic carbon source; (3) sludge produc...

AI Technical Summary

Problems solved by technology

[0006] However, these methods have some disadvantages that cannot be ignored. 1. Although high temperature can expand the gap between the growth rate of AOB and NOB, but for urban sewage, the cost of heating consumption is very high; 2. The oxygen saturation coefficient of AOB is lower than that of NOB. Lower DO is easy to achieve short-range nitrification, but lower DO will also reduce the activity of AOB and slow down the ammonia oxidation rate; 3. FA and FNA inhibition to achieve short-range nitrification of urban sewage mainstream requires side treatment, and another treatment is built 4. Real-time control, that is, stop the aeration before the oxidation of ammonia nitrogen is completed, so as to prevent the process of oxidizing nitrite into nitrate

But studies have shown that short-cut nitrification with real-time control takes a long time

Images