Monitoring and Treatment Effect Analysis and Evaluation of Water Quality Indicators in a Certain Sewage Treatment Plant
A certain sewage treatment plant shoulders the heavy responsibility of industrial and domestic sewage treatment in the city.Therefore,this article monitors the water quality indicators of a certain sewage treatment plant,analyzes and evaluates the removal effect of pollutants by the plant.The results showed that a certain sewage treatment plant had a pH value between 7.18 and 7.62 after treating the sewage;The COD concentration is between 10～27 mg/L,and the removal rate of COD by the outlet is between 88%and 95%;The concentration of BOD5 is between 1～7.5 mg/L,and the removal rate of BOD5 is between 90%and 97%;The ammonia nitrogen concentration is between 0.7 and 2.5 mg/L,and the removal rate of NH3-N is between 90%and 97%;The concentration range of TN is between 10 mg/L and 13 mg/L,and the removal rate of TN is between 75%and 80%;The TP concentration is between 0.2 and 0.4 mg/L,and the removal rate of TP is between 83%and 88%.By comparing with the maximum allowable emission concentration standard value specified in the first Class B standard of GB 18918-2002"Pollutant Discharge Standards for Urban Sewage Treatment Plants",the concentration of all pollutants in the sewage treatment plant meets the standard requirements and the treatment effect is relatively stable.
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