Method for starting anaerobic ammonium oxidation reactor to treat high-salt nitrogenous wastewater

Abstract

The invention discloses a method for starting an anaerobic ammonium oxidation reactor to treat high-salt nitrogenous wastewater. Anaerobic sludge and aerobic sludge are inoculated to a reactor, starting strategies are as follows: at first, anaerobic ammonium oxidation bacteria are enriched in the reactor through maintaining the conditions of anaerobism, organic carbon source-free feed water and no saltness, and a microflora system which takes the anaerobic ammonium oxidation bacteria as dominant bacteria is built; then, salt-tolerant anaerobic ammonium oxidation bacteria are preferentially selected under the conditions of low nitrogen concentration and low saltness, non-dominant bacteria are elutriated, and a microflora system which takes the salt-tolerant anaerobic ammonium oxidation bacteria as dominant bacteria is built; and finally, the nitrogen concentration and saltness are gradually increased, so that the ammonium oxidation bacteria can be suitable for high nitrogen concentration and high saltness environments. Through a mode of gradually changing a feed water base material, the problem of slow anaerobic ammonium oxidation bacteria enrichment under saltness inhibition is solved, the starting mode is simple and practicable, and the difficulty in starting a high-salt wastewater anaerobic ammonium oxidation treatment system is lowered.

Description

technical field [0001] The invention relates to a start-up method of an anaerobic ammonium oxidation reactor for treating high-salt and high-nitrogen wastewater in industries such as chemical industry and food processing, and belongs to the technical field of wastewater treatment. Background technique [0002] At present, the total amount of high-salt wastewater is huge and tends to increase year by year. If it is discharged directly without treatment, it will cause serious pollution to the environment. [0003] Anammox is a kind of NH 4 + -N is electron donor, with NO 2 - The microbial reaction in which -N is an electron acceptor to generate nitrogen gas has good development and application prospects in the field of wastewater biological denitrification, but the generation time of anammox bacteria is long and the growth is slow. [0004] The key to the treatment of high-salt wastewater is to domesticate salt-tolerant microorganisms. High salinity will inhibit microorga...

AI Technical Summary

Problems solved by technology

High salinity will inhibit microorganisms, so the enrichment of anammox bacteria in a high-salt environment is slower, resulting in a longer start-up time for the treatment of high-salt wastewater systems using anammox reaction

In order to change this situation, there is an invention patent application 2010102266302 in the prior art, which discloses a start-up method of a salt-tolerant anammox reactor. The method first raises the nitrogen concentration, cultivates and enriches the anammox bacteria, After the reactor realizes the anammox function, the salinity is gradually increased to domesticate the adaptability of the anammox bacteria to the salinity, so the start-up process can be divided into two processes of enrichment and domestication, and the reactor start-up time is relatively short. Long, and the reactor's ability to resist impact is relatively weak

However, in actual production, environmental conditions are changing, and sudden changes in salinity and nitrogen concentration will impact the treatment system, so this method is not capable of adapting to environmental changes.