Integrated treatment of municipal wastewater using advanced electro-membrane filtration system

Abstract

Treatment of municipal wastewater using advanced physicochemical process maximizes the removal of biological oxygen demand (BOD5), chemical oxygen demand (COD) and phosphate. Also discarding of suspended solids using nano adsorbent then electrochemical treatment, followed by ultra-filtration membrane was conducted. So, treated wastewater can be reused for agriculture of non-edible or wood trees, fishes, livestock and sheep farming. The results showed that: BOD5, COD, and phosphates percent removal of 93%, 95% and 100% respectively. Using mini hydro turbine of power generation about 1.5 k wt/h and with a flow rate of 10–15 L/s. 50% of the energy consumption could be recovered by rotation of the mini hydro-turbine using reject flow. Construction and operating costs of sewage treatment plants can be reduced up to 50% compared with that of traditional low-efficiency biological treatment plants. Sludge produced from the advanced proposed process in this investigation can be used as fertilizer due to its quality while that produced from the traditional treatment process is unsafe to reuse.