Pulse Electrolysis in the Electro-Oxidation on the Ti/SnO2-Sb2O5 Anode for Wastewater Treatment

2019 ◽  
Vol 28 (29) ◽  
pp. 33-38 ◽  
Author(s):  
Qing Ni ◽  
Donald W. Kirk ◽  
Steven J. Thorpe
Keyword(s):  
Wastewater Treatment ◽  
Pulse Electrolysis ◽  
Electro Oxidation

scholarly journals A Novel Method for Efficient Electrochemical Treatment of Actual Dyeing Wastewater With Energy Saving

2021 ◽  
Author(s):  
Jiachao Yao ◽  
Sini Lv ◽  
Zeyu Wang ◽  
Liyong Hu ◽  
Jun Chen
Keyword(s):  
Wastewater Treatment ◽  
Energy Saving ◽  
Current Density ◽  
High Energy ◽  
Ammonia Removal ◽  
Active Chlorine ◽  
Main Reaction ◽  
Dyeing Wastewater ◽  
Novel Method ◽  
Electro Oxidation

Abstract Electro-oxidation is a promising technology for wastewater treatment with bio-refractory organic and nitrogen pollutants; however, the high energy-demanding hinders its wide application. In this study, a novel method by regulating the significant parameter during electro-oxidation process timely for actual dyeing wastewater treatment with energy saving was studied. Operating factors (i.e., flow rate, initial pH value, electrode distance, and current density) were investigated for chemical oxygen demand (COD) and ammonia removal, and results indicated that current density was the key factor which obviously influenced the electrochemical performance. Indirect oxidation by active chlorine was then confirmed as the main reaction pathway for pollutants oxidation, and the relationship between the current density and the generation of active chlorine was established, suggesting that a large part of the generated active chlorine was not utilized effectively. Subsequently, a novel method by variation of current density timely based on the reaction mechanism was proposed; results indicated that, with similar pollutant removal efficiency, energy consumption could be reduced from 31.6 kWh/m3 to 20.5 kWh/m3. Additionally, the novel system was further optimized by Box-Behnken design: COD and ammonia removal efficiencies could reach 71.8% and 100% respectively, and energy-demanding could be reduced by 45.6%.

Design of the Photovoltaic Solar Electro-Oxidation (PSEO) process for wastewater treatment

2011 ◽  
Vol 89 (12) ◽  
pp. 2679-2685 ◽  
Author(s):  
Enrique Alvarez-Guerra ◽  
Antonio Dominguez-Ramos ◽  
Angel Irabien
Keyword(s):  
Wastewater Treatment ◽  
Electro Oxidation

scholarly journals Combined electrocoagulation and electro-oxidation of industrial textile wastewater treatment in a continuous multi-stage reactor

2017 ◽  
Vol 76 (9) ◽  
pp. 2515-2525 ◽  
Author(s):  
Edison GilPavas ◽  
Paula Arbeláez-Castaño ◽  
José Medina ◽  
Diego A. Acosta
Keyword(s):  
Wastewater Treatment ◽  
Current Density ◽  
Design Of Experiment ◽  
Operating Cost ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Fractional Factorial ◽  
Multi Stage ◽  
Electro Oxidation ◽  
Textile Wastewater Treatment

Abstract A combined electrocoagulation (EC) and electrochemical oxidation (EO) industrial textile wastewater treatment potential is evaluated in this work. A fractional factorial design of experiment showed that EC current density, followed by pH, were the most significant factors. Conductivity and number of electrooxidation cells did not affect chemical oxygen demand degradation (DCOD). Aluminum and iron anodes performed similarly as sacrificial anodes. Current density, pH and conductivity were chosen for a Box–Behnken design of experiment to determine optimal conditions to achieve a high DCOD minimizing operating cost (OC). The optimum to achieve a 70% DCOD with an OC of USD 1.47/m3 was: pH of 4, a conductivity of 3.7 mS/cm and a current density of 4.1 mA/cm2. This study also shows the applicability of a combined EC/EO treatment process of a real complex industrial wastewater.

Sign in / Sign up

Export Citation Format

Share Document