Cho, Kangwoo Kwon, Daejung Hoffmann, Michael R. 2024-01-20T10:32:23Z 2024-01-20T10:32:23Z 2021-09-05 2014-02 2046-2069 https://pubs.kist.re.kr/handle/201004/127156 We have developed a wastewater treatment system that incorporates an electrolysis cell for on-site wastewater treatment coupled with molecular hydrogen production for use in a hydrogen fuel cell. Herein, we report on the efficacy of a laboratory-scale wastewater electrolysis cell (WEC) using real human waste for the first time with semiconductor electrode utilizing a mixed particle coating of bismuth oxide doped titanium dioxide (BiOx/TiO2). A comprehensive environmental analysis has been coupled together with a robust kinetic model under the chemical reaction limited regime to investigate the role of various redox reactions mediated by chloride present in human waste. The oxidative elimination of the chemical oxygen demand (COD) and ammonium ion can be modelled using empirical, pseudo-first-order rate constants and current efficiencies (CE). In combination with an anaerobic pre-treatment step, human waste containing high-levels of COD, protein, and color are eliminated within 6 hours of batch treatment in the WEC. The reactor effluent has a residual inorganic total nitrogen (TN) concentration of similar to 40 mM. The CE and specific energy consumption were 8.5% and 200 kWh per kgCOD for the COD removal, 11% and 260 for kWh per kgTN for the TN conversion. The CE and energy efficiencies (EE) for hydrogen production were calculated to be 90% and 25%, respectively. English ROYAL SOC CHEMISTRY HUMAN WATER SECURITY ACTIVE CHLORINE ORGANIC POLLUTANTS INDIRECT OXIDATION ANODIC-OXIDATION DEGRADATION EVOLUTION OXYGEN ELECTROCATALYSIS ELECTROLYSIS Electrochemical treatment of human waste coupled with molecular hydrogen production Article 10.1039/c3ra46699j 1 RSC ADVANCES, v.4, no.9, pp.4596 - 4608 RSC ADVANCES 4 9 4596 4608 scie scopus 000328956700048 2-s2.0-84891437455 Chemistry, Multidisciplinary Chemistry Article HUMAN WATER SECURITY ACTIVE CHLORINE ORGANIC POLLUTANTS INDIRECT OXIDATION ANODIC-OXIDATION DEGRADATION EVOLUTION OXYGEN ELECTROCATALYSIS ELECTROLYSIS