Short-cut nitrification/anaerobic ammonia oxidation-integrated device and method based on hydroxylamine rapid start-up and stable maintenance

Abstract

The invention discloses a rapid start-up and stable maintenance short-cut nitrification / anaerobic ammonia oxidation-integrated device and method based on hydroxylamine, and belongs to the field of biological treatment of urban domestic wastewater. Stable operation of short-cut nitrification and activity of anaerobic ammonium oxidation bacteria matched with the short-cut nitrification are very important to a short-cut nitrification / anaerobic ammonia oxidation-integrated process, rapid start-up and stable maintenance of operation of the short-cut nitrification / anaerobic ammonia oxidation of theurban wastewater are very difficult to realize only by controlling of process parameters. The effect of inhibiting of the activity of nitrite-oxidizing bacteria and increasing of the activity of anaerobic ammonia oxidation can be achieved by adding of the hydroxylamine (HA), and a short-cut nitrification / anaerobic ammonia oxidation-integrated reactor can be started in a short time, and better treatment results can be maintained. Compared with a traditional nitrification-denitrification nitrogen removal process, the short-cut nitrification / anaerobic ammonia oxidation-integrated process saves aeration rate, reduces sludge production, saves carbon sources, and is especially suitable for low-C / N urban domestic wastewater.

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...

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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

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