Quick start method of denitrification bioreactor

Abstract

The invention discloses a quick start method of a denitrification bioreactor. The quick start method comprises the following steps of: 1) separating out a group of sulfur autotrophic denitrifying bacteria from an experimental denitrification bioreactor; 2) putting the sulfur autotrophic denitrifying bacteria obtained in the step 1) in a culture solution for enlarge cultivation; 3) immobilizing the sulfur autotrophic denitrifying bacteria mixture obtained after enlarge cultivation on a carrier by taking activated carbon or ceramsite as the adsorption carrier and inoculating the bacteria into the denitrification bioreactor, thereby realizing quick start of the denitrification bioreactor. The quick start method of the denitrification bioreactor provided by the invention has the following advantages that the mixture of a plurality of sulfur autotrophic denitrifying effective strains is obtained through culture on the basis of experimental study, the optimal condition for growth of the microbial population is found out, and an appropriate carrier is utilized so that the microbial population grows quickly under appropriate growth conditions, and therefore, lots of functional microorganisms can be obtained in short time for inoculation of the sulfur autotrophic denitrification bioreactor; as a result, the time of starting the reactor is greatly shortened.

Description

Technical field [0001] The invention relates to sewage treatment, in particular to a quick start method of a denitrification bioreactor. Background technique [0002] Due to the increasing frequency of human production and living activities, a large amount of nitrogen is discharged into natural water bodies, causing eutrophication of water bodies. At present, most of the large and medium-sized lakes and reservoirs in my country are facing serious eutrophication problems. Nitrogen compounds in nature exist in the form of organic nitrogen compounds, ammonia nitrogen, nitrate nitrogen and gaseous nitrogen. After a series of natural or artificially enhanced biological transformation processes, most of the nitrogen exists in the form of nitrate nitrogen (mainly nitrate nitrogen) before and after being discharged into natural water bodies. The excessive presence of nitrate nitrogen is not only one of the main reasons for the eutrophication of water bodies, but also poses a great thre...

AI Technical Summary

Problems solved by technology

However, there is no precedent for practical application of autotrophic denitrification at present. The main bottleneck is: the growth of autotrophic denitrification bacteria is slow, and the start-up process of the reactor takes a long time