Research Progress: Reduction of Excess Sludge by Ozone in the Sewage Biotreatment Process

摘要

The principle for the reduction of excess sludge by the ozone in the sewage treatment plants (STPs) was introduced and the change of characteristics of the ozonated sludge was analyzed in this paper. Furthermore, the effects of ozonation of activated sludge on the biotical treatment process in the STP were summarized. At last, the applications of this kind of technology in the worldwide range were enumerated and some further research directions were suggested.