Research on Sulfur Autotrophic Denitrification Technology for Treating Nitrogen-containing Wastewater
In order to investigate the treatment effect of sulfur autotrophic denitrification technology on nitrogen-containing wastewater,this paper used this technology to conduct denitrification experiments on simulated nitrogen-containing wastewater.Among them the effects of hydraulic retention time,total nitrogen concentration load of influent,reaction temperature,influent pH and other factors on denitrification treatment effect were investigated,and the microbial community structure and composition of sulfur autotrophic sludge were analyzed.As Nitrospira(Nitrospira genus)that plays a role in nitrification in the seed mud,Methanotenera(Methanotenera genus)that undergoes heterotrophic denitrification has decreased from 5.55%and 3.46%in the seed mud to 0.63%and 0.17%after domestication.Nitrifying bacteria and heterotrophic denitrification bacteria have basically disappeared.Thiobacillus(Thiobacillus genus),as an autotrophic denitrifying bacterium,is significantly enriched,and the sulfur autotrophic denitrification system has been basically domesticated.The results show that the sulfur autotrophic denitrification technology process,after experimental verification and investigation,does not require the addition of organic carbon sources,adapts to a large temperature difference range,tolerates a high pH range in the influent,and has a large fluctuation in the total nitrogen concentration in the covered influent.It can effectively achieve the removal of total nitrogen in wastewater and Reduce drug consumption.
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