Authors: Guolong Huang Jiachao Yao Weilong Pan Jiade Wang
Publish Date: 2016/06/08
Volume: 23, Issue: 18, Pages: 18288-18295
Abstract
Effluents after biochemical treatment contain pollutants that are mostly nondegradable Based upon previous pilotscale test results an industrialscale electrooxidation device was built to decompose these refractory materials in the effluent from a park wastewater treatment plant The electrooxidation device comprised a ditchshaped plunger flow electrolysis cell with meshplate Ti/PbO2 electrodes as the anode and the same size meshplate Ti as the cathode Wastewater flowed vertically through electrodes the effective volume of the cell was 28 m3 and the surfacetovolume ratio was 1714 m2 m−3 The optimal current density was 100 A m−2 and a suitable flow velocity was 140 m h−1 The removal efficiencies for chemical oxygen demand and color in the effluent were over 600 and 840 respectively In addition the electrooxidation system offered a good disinfection capability The specific energy consumption for this industrialscale device was 435 kWh kg COD−1 with a current efficiency of 328 which was superior to the pilotscale one To meet the requirements for emission or reuse the operation cost was 044 per ton of effluent at an average price for electricity of 011 kWh−1
Keywords: