Research on the Change Trend of Sludge Yield in Typical Urban Sewage Treatment Plants in the Lower River Network Area by Improving Quality and Efficiency
In recent years,China has vigorously promoted the quality and efficiency improvement of urban sewage system,and the water concentration and quantity of sewage plants have been greatly increased,and the sludge output has also increased.Through the investigation of N sewage plant in river network area of Guangzhou,analyze the change law of sludge yield before and after quality and efficiency improvement,Further study the specific influence of influent water COD,BOD,SS concentration and influent yield on the sludge yield before and after quality and efficiency improvement,The results show that sludge yield of the sewage treatment plant is significantly different before and after quality and efficiency improvement,After quality and efficiency improvement,sludge yield has increased substantially,gradually decrease and tend to stabilize;The quality and efficiency improvement strengthens the positive correlation between sludge yield and influent water COD and SS concentration,strengthens the negative correlation between sludge yield and influent yield;There was a weak negative correlation between sludge yield and influent BOD concentration before quality and efficiency improvement,weak positive correlation after quality and efficiency improvement.
quality and efficiency improvementsludge yieldchange trendinfluent water concentrationinfluent yieldcorrelation
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