Device and method for realizing stable operation of short-cut nitrification of municipal sewage by utilizing organic matter inhibition

Abstract

The invention discloses a device and a method for realizing stable operation of short-cut nitrification of municipal sewage by utilizing organic matter inhibition, the device comprises a raw water tank, the raw water tank is connected with a short-cut nitrification reactor through a water inlet pump, the short-cut nitrification reactor is connected with a water outlet tank through a drain valve, and the short-cut nitrification reactor is provided with on-line detection equipment. The partial nitrification reactor is provided with a water inlet pump, the partial nitrification reactor is provided with an online detection device, the online detection device is electrically connected with a computer through a PLC (Programmable Logic Controller), the partial nitrification reactor is also provided with a stirrer and an aerator, and the PLC is electrically connected with the water inlet pump, the stirrer, the aerator and a drain valve respectively. Heterotrophic bacteria are induced by organic matters to compete for dissolved oxygen with autotrophic ammonia oxidizing bacteria and nitrite oxidizing bacteria, so that the nitrite oxidizing bacteria are effectively inhibited, meanwhile, the activity of the ammonia oxidizing bacteria is still kept at a relatively high level, nitrite accumulation is realized, and short-cut nitrification of urban sewage is stably operated.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a device and method for realizing the stable operation of short-range nitrification of urban sewage by using organic matter suppression. Background technique [0002] Deep denitrification of sewage is one of the important measures to avoid eutrophication of water body, and it is very important for the protection of water ecological environment. Traditional biological denitrification adopts the whole process of nitrification-denitrification, which often requires high energy consumption and cost in order to meet strict emission standards. In recent years, short-cut nitrification / anammox technology has become a research hotspot because it realizes autotrophic denitrification, which can save about 60% of aeration energy consumption and 100% of organic carbon sources; at the same time, the output of excess sludge It can be reduced by about 80%. Althou...

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Problems solved by technology

In addition, the generation cycle of heterotrophic bacteria is short, and its excessive reproduction can significantly shorten the sludge age of the whole system, which may cause autotrophic bacteria with a long generation cycle to gradually wash out from the system.

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