Impact of Effluent From Sewage Treatment Plants on River Water and Bacterial Community Composition in Sediment
Effluent discharge from sewage treatment plants is related to the quality and ecology of receiving water.In this study,based on analyzing the indicators of effluent discharge from a sewage plants in Wuhan City,the effects of effluent from the sewage plant on the water quality indicators and microorganisms in sediment were in-vestigated by using a flume test.The results showed that the effluent discharge promoted the degradation of nitrate nitrogen in river water and the removal of total phosphorus was more stable.The effluent increased the pH of the river water by 0.3 units,conductivity by 55%and dissolved oxygen decreased by 0.6 mg/L.After effluent dis-charge,the bacterial community in sediment increased in abundance and decreased in diversity,with the anaerobic bacteria Anaerolineaceae and SBR1031 being suppressed and the aerobic bacteria Pseudomonas being promoted.The denitrifying bacteria Azospira,Dechloromonas,Pseudomonas,and Sphingomonas increased,which promoted the degradation of NO-3-N.The relative abundance of the pathogenic bacteria Neisseria spp.,Legionella spp.,and disinfecting residual bacteria increased in sediment.
万方数据
维普
