Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Thuvakudi, Tamil Nadu, 620 015, India.
Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Thuvakudi, Tamil Nadu, 620 015, India.
J Environ Manage. 2018 Mar 15;210:328-337. doi: 10.1016/j.jenvman.2018.01.019.
Treatment of stabilized landfill leachate is a great challenge due to its poor biodegradability. Present study made an attempt to treat this wastewater by combining electro-Fenton (E-Fenton) and biological process. E-Fenton treatment was applied prior to biological process to enhance the biodegradability of leachate, which will be beneficial for the subsequent biological process. This study also investigates the efficiency of iron molybdophosphate (FeMoPO) nanoparticles as a heterogeneous catalyst in E-Fenton process. The effects of initial pH, catalyst dosage, applied voltage and electrode spacing on Chemical Oxygen Demand (COD) removal efficiency were analyzed to determine the optimum conditions. Heterogeneous E-Fenton process gave 82% COD removal at pH 2, catalyst dosage of 50 mg/L, voltage 5 V, electrode spacing 3 cm and electrode area 25 cm. Combined E-Fenton and biological treatment resulted an overall COD removal of 97%, bringing down the final COD to 192 mg/L.
由于稳定化垃圾渗滤液的可生化性较差，因此处理该废水是一项巨大的挑战。本研究试图通过电芬顿（E-Fenton）和生物工艺相结合的方法来处理这种废水。在生物工艺之前进行 E-Fenton 处理，以提高渗滤液的可生化性，这将有利于后续的生物工艺。本研究还考察了铁钼磷酸（FeMoPO）纳米颗粒作为非均相催化剂在 E-Fenton 工艺中的效率。分析了初始 pH 值、催化剂用量、施加电压和电极间距对化学需氧量（COD）去除效率的影响，以确定最佳条件。在 pH 值为 2、催化剂用量为 50mg/L、电压为 5V、电极间距为 3cm 和电极面积为 25cm 的条件下，非均相 E-Fenton 工艺对 COD 的去除率达到 82%。E-Fenton 和生物处理的联合处理使 COD 的总去除率达到 97%，最终 COD 降至 192mg/L。
