Comparing the potential treatment of biogas effluent by two artificial wetland wastewater treatment systems

Abstract

Nowadays, environmental pollution treatment is one of the most concerning subjects in many countries. Especially the breeding waste treatment has to be taken as a priority. Besides, biogas technology sets up and operates primarily to treat breeding waste. However, this technology formed a considerable amount of wastewater the effluent quality is still poor and the concentration of pollutants is higher than the required national technical regulation (QCVN 62-MT:2016/BTNMT). The study was conducted on two units of horizontal flow constructed Wetland (HFCW) and vertical flow constructed wetland (VFCW). Both of these units were planted with Cyperus involucratus. The study aimed to compare the potential treatment of two artificial wetland systems and find out an appropriate wetland system to reduce environmental pollution from biogas effluent. The results indicated that vertically Flow Constructed Wetlands exhibited a higher treatment efficiency than horizontally Flow Constructed Wetlands with the average removal efficiency for COD, BOD5, TSS, N-NH3, and P-PO43- were 55.2%, 75.3%, 82.3%, 75.9%, and 70.1%, respectively. The results of this study should provide insight into using wetland systems to treat wastewater and show vertical flow constructed wetland potential for improving the quality of biogas wastewater.