Starting method of normal-temperature low-ammonia-nitrogen plug-flow type half-nitritation process

Abstract

The invention provides a starting method of a normal-temperature low-ammonia-nitrogen plug-flow type half-nitritation process, and belongs to the field of municipal sewage deep processing. Generally, half-nitritation is successfully started in high-temperature and high-ammonia-nitrogen SBR and can not be widely applied to engineering practice, and meanwhile the start time of a system can be prolonged due to the low dissolved oxygen concentration. Therefore, development of the method for rapidly starting nitritation under the continuous flow low-ammonia-nitrogen condition is particularly important. The running mode of two stages is adopted; in the other words, at the first stage, large-amount AOB enrichment is successfully achieved through whole-course aerobiotic and oxygen-limited running and NOB is increased as little as possible, and at the second stage, rapid starting of low-ammonia-nitrogen continuous flow half-nitritation is achieved by utilizing the combined effect of a front anaerobic pool and a follow-up oxygendepletion pool while regulating DO in the aerobiotic pool and through anaerobic, aerobiotic and oxygendepletion running.

Description

Technical field [0001] The invention belongs to the research of advanced treatment of urban sewage, and specifically relates to a method for quickly starting the semi-nitrosation with low ammonia nitrogen at room temperature by using anaerobic / aerobic / anoxic continuous flow. Background technique [0002] my country's water resources are very scarce and water pollution is very serious. The increasingly serious water pollution problem has affected human life, and nitrogen pollution has gradually become the focus of attention. [0003] ANAMMOX technology is currently known as the most economical way to remove nitrogen from sewage. It is a process in which microorganisms use ammonia nitrogen as electron donor and sulfite nitrogen as electron acceptor under anaerobic or anoxic conditions to convert it into nitrogen. . Compared with the traditional nitrification and denitrification process, anaerobic ammonia oxidation has the advantages of low oxygen consumption, low operating cost, no ...

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Problems solved by technology

[0004] However, as the precursor of the anammox process, the start-up and stable operation of nitrosation under normal temperature and low ammonia nitrogen conditions have always been the difficulty of the anammox process, and at the same time it is the key to the anammox process

Researchers often use high temperature, high ammonia nitrogen, and low dissolved oxygen to separate the two in SBR, which is difficult for engineering applications. At the same time, NOB acclimated to high ammonia nitrogen tends to form resistance to high free ammonia, so the system transitions to low ammonia nitrogen. The period is prone to cause the collapse of the reactor

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