Ex-situ microbial remediation method for novel city riverway sewage

Abstract

The invention relates to an ex-situ microbial remediation method for novel city riverway sewage. The method includes the steps of firstly, screening to obtain efficient heterotrophic nitrification-aerobic denitrification Raoultella, and performing inoculation expanding culture to preliminarily enrich microorganisms; secondly, taking the city riverway sewage, and testing the initial ammonia and nitrogen concentration of the city riverway sewage; adding the microorganisms into the city riverway sewage, and standing to obtain treated city riverway sewage; thirdly, centrifuging the treated city riverway sewage, taking supernate, adding trace absorbent into the supernate, treating in a shaking box, and filtering to obtain secondary supernate; fourthly, adding the microorganisms into the secondary supernate again, standing, and centrifuging to obtain tertiary supernate which is remedied city riverway sewage. The method for treating the novel city riverway sewage is high in efficiency, good in treatment effect, and the like.

Description

technical field [0001] The application belongs to the technical field of environmental microbes, and more specifically, relates to a new type of ectopic microbial restoration method for urban river sewage. Background technique [0002] At present, my country's urban rivers are seriously polluted. Most of the river sewage is characterized by low organic matter concentration and relatively high nitrogen and phosphorus content, and the water quality and volume are constantly changing with the seasons. Although the traditional urban sewage treatment process in the prior art has high treatment capacity for organic matter, its removal capacity for nitrogen and phosphorus is relatively poor. [0003] Microbial remediation technology is a new technology for water pollution remediation that has developed rapidly recently. This remediation technology mainly uses microorganisms to absorb, transform or degrade pollutants in water bodies, so as to achieve the purpose of slowing down or ...

AI Technical Summary

Problems solved by technology

[0005] The ectopic microbial remediation technology also has its shortcomings. The electron acceptor is provided by aeration, and the operating cost is increased; when the amount of nutrients added is excessive, it will cause secondary pollution; The temperature and pH value of the sewage environment, microorganisms are very sensitive to changes in environmental temperature and pH value; when the permeability of the aquifer is poor, the diffusion of nutrients and oxygen is difficult, affecting the degradation effect of pollutants