With the acceleration of urbanization and industrial development, the treatment rate of urban sewage and industrial wastewater has increased year by year. Taking China for instance, there were more ...

Activated sludge is a process in sewage treatment in which air or oxygen is forced into sewage liquor to develop a biological floc which reduces the organic content of the sewage.

The study investigated the unbiodegradable fraction of particulate chemical oxygen demand (PCOD) in thickened waste activated sludge (TWAS) using semicontinuous-flow completely-mixed anaerobic ...

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