Activate sludge ATP ( adenosine triphosphate) process has the characteristics of quick,simple and sensitive operation,which can give feedback on microbial activity state during the biological treatment process. In this paper,the ATP measurement was used to analyze the cell activity and determine the amount of activate sludge. Also,the biochemical system state was observed by mi-crobiological microscopy to judge the biological treatment capacity of sewage treatment plant. Meanwhile,the content of dissolved oxy-gen in activate sludge and the agitation degree of the system were investigated to explore the denitrification effect. Based on the results,the ATP measurement can be used in the list of daily checks for quantitative analysis of activate sludge state in sewage treatment plant,being an effective means for determining whether the process performs properly.
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