Abstract
In this study, methane fermentation effluent was electrochemically treated with Ti/Pt-Ir02 and iron electrodes in two steps. Because of a high suspended solid concentration, methane fermentation effluent is generally pretreated by dilution or coagulation before electrochemical treatment. Targeting engineering applications, methane fermentation effluent was electrochemically treated in one cell without any pretreatment. Optimal running conditions under this experiment were investigated based on the efficiency of carbon (total organic carbon, inorganic carbon) , nitrogen (ammonium nitrogen, nitrate nitrogen) and phosphorus (total phosphorus, ortho-phosphorus) removal.HomePage
The treatment process included two steps: Ti/Pt-IrO2 Was used as an anode and, iron as a cathode in the first step. The anode and cathode were exchanged with each other in the second step. During the first step, HOCI produced on the Ti/Pt-IrO2 anode oxidized ammonium nitrogen to nitrogen gas. Furthermore organic carbon, suspended solids were also discharged from the cell by electro-flotation. In the second step, phosphorus and total carbon were removed by electro-coagulation. After these two treatment steps, 100%, 80% and 70% of ammonium nitrogen, total organic carbon and total phosphorus were respectively removed.Keywords: methane fermentation effluent, iron electrode, Ti/Pt-IrO2, electro-flotation, electro-coagulation, Fenton process