Starting and running method of completely autotrophic ammonium removal over nitrite technology

Abstract

A starting and running method of a completely autotrophic ammonium removal over nitrite technology belongs to the water environment recovery and regeneration fields. The starting and efficient and stable running method of the completely autotrophic ammonium removal over nitrite (CANON) technology in a biofilter reactor at normal temperature comprises the following steps: inoculating sludge, carrying out filter material film forming under an anaerobic and anoxic condition, starting CANON under an oxygen limited condition, and controlling the hydraulic retention time and the aeration rate in a combined mode to realize the high-load stable running. The CANON technology is started within 61d, the total nitrogen removal load in the 42d running after starting reaches 3.52kg.m<-3>.d<-1>, and the load is an extremely high level in the research field of the CANON technology, so the method has a simple operation, is easy to implement, and can realize the effective and rapid starting and the high-load running of the CANON technology.

Description

technical field [0001] The invention belongs to the field of water environment restoration and regeneration. Specifically, it relates to a method for start-up and high-load operation of the process of biofilm process autotrophic denitrification (CANON) in normal-temperature, high-ammonia-nitrogen sewage. Background technique [0002] Nowadays, nitrogen pollution has become one of the main factors of water pollution. During the "Twelfth Five-Year Plan" period, my country's Ministry of Environmental Protection listed ammonia nitrogen as one of the restrictive control indicators, and nitrogen control is imminent. At present, the denitrification process of sewage treatment plants is mostly based on the traditional principle of nitrification and denitrification. Although it has played an important role in the field of biological denitrification, it has the disadvantages of long process flow, high power consumption, and high sludge production. [0003] In recent years, based on ...

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Problems solved by technology

However, because it integrates aerobic ammonium oxidizing bacteria and anammox oxidizing bacteria, two strains with diametrically opposite growth environments in one reactor, and the age cycle of anammox oxidizing bacteria is as long as 10.6 days. The rapid start-up of the nitrogen process and the adjustment of the operating parameters of the reactor to make the internal environment of the reactor suitable for the coexistence of the two strains and to obtain a higher nitrogen removal load have become the difficulties that this process needs to overcome.

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