POTENTIAL OF CONSTRUCTED WETLANDS FOR WASTEWATER TREATMENT FROM BIOGAS EFFLUENT

Abstract

The project aimed at finding out an appropriate procedure to reduce environment pollution from breeding wastewater of biogas system which, then can be applied in the constructed wetlands system. Two units of Horizontal Flow Constructed Wetland (HFCW) and Vertical Flow Constructed Wetland (VFCW) were located and set up in two treatments with three replications. Both of these units were planted with Cyperus involucratus. Wastewater was fed into the wetland units at a mean flow rate of 312ml/day. Major parameters including COD, BOD₅, SS, N-NH₃; P-PO₄^3- were measured. The results indicated that Vertical Flow Constructed Wetland exhibited a higher treatment efficiency than Horizontal Flow Constructed Wetland with the average removal efficiency for COD, BOD, SS, N-NH₃ and P-PO₄^3- were 55.2%, 75.3%, 82.3 %, 75.9 % and 70.1 %, respectively. The constructed wetlands can be used as an option for improving the quality of biogas wastewater.