Treatment of agricultural wastewater in a pilot-scale tidal flow reed bed system

摘要

Tidal flow reed bed treatment is a process consisting of alternately filling and draining the bed matrix with wastewater. During the draining process, air is positively drawn from the atmosphere into the bed so the aeration of the system is ignificantly improved. A pilot-scale tidal flow reed bed system was studied for the treatment of agricultural wastewater, Which was prepared by diluting pig slurry. At an average influent BOD_5 of 649 mg 1~-1 and ammoniacal-nitrogen of 333 mg 1~-1, the BOD_5, COD, SS and PO_4-P levels were reduced by 71.0, 58.3, 65.2 and 38.7/100, respectively.