Starting method of integrated short-cut nitrification-anaerobic ammonia oxidation de-nitrification process

Abstract

The invention discloses a starting method of an integrated short-cut nitrification-anaerobic ammonia oxidation de-nitrification process. The starting method comprises the following steps: step 1), only inoculating anaerobic ammonium oxidation bacterium AAOB strains into an integrated reactor, and controlling the molar concentration ratio of NH4<+>-N to NO2<->-N in inlet water of the reactor to be1: 0.5-1: 1.32 in the step 1); and 2) when the AAOB strains in the integrated reactor in the step 1) reach the required quantity, inoculating the AAOB strains in the integrated reactor, gradually increasing the proportion of NH4<+>-N: NO2<->-N in the inlet water in the step 2), and simultaneously carrying out short-cut nitrification and anaerobic ammonia oxidation in the reactor. The starting method is beneficial to realizing multiplication and enrichment of AAOB strains, so that the engineering is rapidly started, and the starting process of the integrated short-cut nitrification-anaerobic ammonia oxidation reactor is shortened.

Description

technical field [0001] The invention belongs to the field of novel biological denitrification, and in particular relates to a start-up method of an integrated short-range nitrification-anammox denitrification process. Background technique [0002] The anammox technology has not been widely used in engineering practice, mainly because: ① The activity of anammox bacteria is strictly limited by temperature, pH, DO, organic matter and substrate (reactive substrate NH 4 + -N, NO 2 - -N is also an inhibitor, especially NO 2 - -N suppression) and other influencing factors lead to problems such as low impact resistance and poor stability. ② Due to the low yield of anammox bacteria AAOB strains, long generation cycle, and the easy loss of anammox bacteria AAOB strains in the initial stage of anammox reaction, it is relatively difficult to enrich anammox bacteria difficulty. [0003] Anaerobic ammonia oxidizing bacteria AAOB has a long generation cycle and a very long doubling ...

AI Technical Summary

Problems solved by technology

[0002] The anammox technology has not been widely used in engineering practice, mainly because: ① The activity of anammox bacteria is strictly limited by temperature, pH, DO, organic matter and substrate (reactive substrate NH 4 + -N, NO 2 - -N is also an inhibitor, especially NO 2 - -N suppression) and other influencing factors lead to problems such as low impact resistance and poor stability

② Due to the low yield of anammox bacteria AAOB strains, long generation cycle, and the easy loss of anammox bacteria AAOB strains in the initial stage of anammox reaction, it is relatively difficult to enrich anammox bacteria difficulty

Therefore, in the start-up stage of the anammox project, that is, the initial growth stage of the anammox bacteria AAOB, the use of a cyclone separator cannot solve the technical problem that the enrichment of the anammox bacteria AAOB is difficult and the start-up period is long.

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