Device and method for domesticating N2O-producing denitrifying bacteria by utilizing separation membrane filler

Abstract

The invention discloses a device and a method for domesticating N2O-producing denitrifying bacteria by using a separation membrane filler. The device comprises a short-cut denitrification bioreactor,a water inlet tank, a water outlet tank, the separation membrane filler, a magnetic stirrer, an aeration system and a PLC control system, wherein the short-cut denitrification bioreactor is arranged on the magnetic stirrer and is respectively communicated with the water inlet tank, the water outlet tank and the aeration system, a columnar microporous net filled with a separation membrane filler isarranged in the short-cut denitrification bioreactor, and the top of the short-cut denitrification bioreactor is communicated with gas collection equipment; the water inlet and outlet flow of the short-cut denitrification bioreactor is controlled through the PLC control system, floc sludge is domesticated, and the N2O-producing denitrifying bacteria is enriched. N2O generated in the short-cut denitrification process is transferred into the separation membrane filler in situ, and after continuous operation, the conversion efficiency of the N2O can reach 80% or above, so that the purpose of enriching the N2O-producing denitrifying bacteria is achieved.

Description

technical field [0001] The invention belongs to the field of environmental microorganisms and environmental monitoring, and mainly relates to the production of N in the process of denitrification 2 O domestication and enrichment of denitrifying bacteria. Background technique [0002] The eutrophication of water body is becoming more and more serious, bringing a series of ecological problems, making lakes and other natural water bodies swampy, or even disappearing, and endangering human health. Therefore, the removal of nitrogen and phosphorus in wastewater is an important way to solve the eutrophication of water bodies, and has attracted everyone's attention. [0003] The biological denitrification process of sewage is to produce N 2 One of the sources of O. N 2 O is a greenhouse gas and at the same time a potential renewable energy source, for example, when it is used instead of oxygen to oxidize CH 4 , can increase the calorific value by 37%. [0004] CH 4 +4NO 2 →...

AI Technical Summary

Problems solved by technology

However, under the conventional denitrification process and conditions, N 2 The conversion rate of O is low, and it is difficult to enrich N 2 o

Images