A Combined Processes Of Biofilm Filtration And Chemical Coagulation For The Treatment Of Wastewater For Reuse

The advanced treatment and reuse for the effluent of the sewage treatment plant, not only can reduce the contamination in environment , saving the resource of water , but also bring benefit for consumer and sewage treatment plant , The traditional process for the treatment of wastewater for reuse is coagulant, deposition, filtration in base of second treatment, but it is ease to plant biofilm , it is limit of the investment for UF and is high for using.Biological Aerated Filter,is one of the newly developed wastewater treatment technology. It has been widely used for industrial and municipal wastewater treatment.Biological aeration filter (BAF) was combined with chemical coagulation and was used for the treatment of waste water from municipal waste water work for the purpose of reuse. Chemical coagulant was used as the first-step process for the removing suspended solids(SS) and colority, and BAF as the second-step for removing the pollutants further through biological activity and biological filtration of biofilm. The results showed that CODcr, NH4+-N, SS, and colority were reduced from 70~100mg/L,15~20mg/L,10~20mg/L, and 12-20 times in influent to 40mg/L, 3mg/L,10mg/L, and 2 times in effluent., respectively, through the treatment...