Rapid biological filter was used for advanced treatment of effluent from a secondary treatment wastewater plant.The results showed that rapid biological filter had high flexibility for the variation of secondary effluent quality.Except for hygienic index,the effluent of rapid biological filter can reach vehicles washing water standard in CJ25.1-89 at most time of our test.Corresponding to the change of influent quality,the type of biochemical reaction is changed in rapid biological filter,which could be ref...
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