Purification efficiency of vertical-flow wetland system constructed by cinder and turf substrate on municipal wastewater

Abstract

Abstract: Vertical-flow constructed wetlands (VFCWs) system not only has a higher hydraulic loading rate (54～64cm·d^-1), but also has a good removal efficiency for organics, ammonia nitrogen (AN) and total phosphorus (TP). The removal efficiencies of COD, BOD₅, AN, and TP for septic tank effluent were 76～87%, 82～92%, 75～85% and 77～91%, respectively,and the average effluent concentrations of COD, BOD₅, AN, and TP in the treated effluent were less than 60, 20, 25 and 2.0 mg·L^-1, respectively. Acomparison of planted and unplanted columns showed that plantation of Cyperus alternifolius could increase the removal rates of AN, TN, and TP by 2～3%, 4～6%, and 10～14%, respectively.

Key words: Constructed wetland, Municipal wastewater, Cyperus alternifolius, Purification efficiency, riparian zone, niche breadth, niche overlap., niche similarity, Pterocarya stenoptera

CLC Number:

X703

CUI Lihua, ZHU Xizhen, LUO Shiming, LIU Yihu. Purification efficiency of vertical-flow wetland system constructed by cinder and turf substrate on municipal wastewater[J]. Chinese Journal of Applied Ecology, 2003, (4): 597-600.

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