Start-up method of integrated short-path nitrification-anammox denitrification process

Abstract

The invention discloses a start-up method of an integrated short-range nitrification-anammox denitrification process. The starting method is as follows: step 1): Inoculate only the anammox bacteria AAOB strain in the integrated reactor, and in the step 1), control the NH in the reactor influent 4 + -N: NO 2 ‑ The molar concentration ratio of ‑N is 1:0.5~1:1.32; step 2): when the anaerobic ammonia oxidizing bacteria AAOB strains in the integrated reactor of the above step 1) reach the required quantity, inoculate in the integrated reactor AOB strains, in the step 2), make NH in the influent 4 + -N: NO 2 ‑ The proportion of ‑N is gradually increased, and the short-cut nitrification and anammox are carried out in the reactor at the same time. The invention is beneficial to realize the multiplication and enrichment of AAOB strains, thereby quickly starting the project and shortening the start-up process of the integrated short-range nitrification-anammox reactor.

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] Anammox technology has not yet been widely used in engineering practice, the main reasons are: 1. The activity of anammox bacteria is strictly limited by temperature, pH, DO, organic matter and substrate (reaction substrate NH). 4 + -N, NO 2 - -N is also an inhibitor, especially NO 2 - -N inhibition) and other influencing factors, resulting in problems such as low impact resistance and poor stability. ②Due to the low yield of anammox bacteria AAOB, the long generation cycle, and the easy loss of AAOB bacteria in the early stage of anammox reaction, the enrichment of anammox bacteria is relatively low. difficulty. [0003] The anammox bacteria AAOB has a long generation cycle and a very long doubling time. Different from the...

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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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