Method for starting single-stage self-supported denitrification reactor

Abstract

The invention relates to a method for starting a single-stage self-supported denitrification reactor, comprising the following steps: establishing a microflora with nitrosobacteria and nitrobacterium as the mainstay under the conditions of restricted supply of oxygen and small amount of available organic carbon source; then controlling ammonia nitrogen oxidization to nitrous acid phase through restricted oxygen supply so as to gather nitrosobacteria, inhibit growth of nitrobacterium and establish the microflora with the nitrosobacteria as the mainstay; optimizing the microenvironment where nitrosobacteria and anammox coexist by adjusting aeration modes and controlling dissolved oxygen level on the basis of the stable nitrous acid system, so as to promote growth and enrichment of the anammox and successfully start the single-stage self-supported denitrification reactor. The method of the invention solves the problem of inoculum source of the single-stage self-supported denitrification reactor, features simple and practical starting mode, reduced difficulty of starting the single-stage self-supported denitrification reactor and shortens times for starting the single-stage self-supported denitrification reactor.

Description

technical field [0001] The invention relates to a start-up method of a single-stage autotrophic denitrification reactor. The single-stage autotrophic denitrification reactor is started on the basis of realizing the nitrous acid stage to treat garbage leachate in landfills and waste water in sewage treatment plants. High ammonia nitrogen low C / N ratio wastewater such as sludge precipitated liquid and animal manure wastewater from poultry farms. Background technique [0002] With economic and social development, human activities intensify, and the original material cycle in nature is destroyed. A large amount of nitrogen, phosphorus and other elements are discharged into the water body through domestic sewage, industrial wastewater, agricultural wastewater, etc., reducing the oxygen content of the receiving water body and accelerating The eutrophication process of water bodies has seriously endangered the environment on which human beings depend for survival. Nitrogen polluti...

AI Technical Summary

Problems solved by technology

[0004] Since the removal of ammonia nitrogen in the single-stage autotrophic denitrification process is completed under the joint action of two autotrophic microorganisms, nitrosating bacteria and anammox bacteria, the growth rate of autotrophic microorganisms is generally slow, and the growth rate of nitrosifying bacteria The generation cycle is 8 to 36 hours, while the growth rate of anammox bacteria is slower, and its generation cycle is as long as 11 days, which seriously restricts the start-up process of the reactor device; Ammonium oxidizing bacteria are strict anaerobic bacteria, how to control the operating conditions of the reactor to create a microenvironment suitable for the coexistence of aerobic bacteria and anaerobic bacteria is the key to realize the single-stage autotrophic denitrification process

In addition, since the single-stage autotrophic denitrification process is a brand-new biological denitrification process, there is no ready-made inoculum sludge for engineering application.