Characteristic analysis of tail water treatment in chemical industry parks by sulfur autotrophic denitrification system
A sulfur autotrophic denitrification plant was used to denitrify the end drainage of a pesticide chemical park water treatment system.After the system was successfully started and operated smoothly,the nitrate simulated wastewater and the actual wastewater were run at room temperature of about 16℃and HRT of 22 h.The test results showed that the average removal rate of NO3--N was 87%and the average concentration of effluent was 21 mg/L after running for 25 d in the simulated wastewater,and the average concentration of the effluent was 17 mg/L,indicating that the denitrification system had good denitrification effect and stable operation.High-throughput sequencing analysis of microorganisms at different stages in the reactor was carried out.The results at the phylum level showed that Proteobacteria was the largest bacterial phylum,and Campilobacterota transitioned from the simulated wastewater to the actual wastewater operation stage,and the abundance increased significantly.At the genus level,Sulfurimonas and Thiobacillus were typical bacterial genera existing in the system.Both of them had the function of sulfur autotrophic denitrification,and their abundance was greatly improved after the reaction.Thiobacillus showed superiority in sulfur autotrophic denitrification and played an important role in inorganic sulfur oxidation and nitrate reduction.
pesticide chemical tail watersulfur autotrophic denitrificationdenitrificationmicroorganismhigh-throughput sequencing
国家科技期刊平台
NSTL
万方数据
维普
