As an efficient biological treatment technology,biofilm method has a wide application prospect in the field of sewage treatment.This paper first summarizes the basic principles and technical characteristics of the biofilm method,and then introduces the process of the biofilm wastewater treatment process and its application in practical engineering in detail.Through the experimental analysis of the treatment effect of biofilm method before and after improvement,the effect of biofilm process improvement was discussed.The results showed that the improved biofilm wastewater treatment process could significantly reduce the five-day biochemical oxygen demand,suspended solids and chemical oxygen demand levels of effluent.
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