TY - JOUR
T1 - Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater
AU - Tian, Yushi
AU - He, Weihua
AU - Zhu, Xiuping
AU - Yang, Wulin
AU - Ren, Nanqi
AU - Logan, Bruce E.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2015-SEED-2450-01
Acknowledgements: This work was supported in part by the Strategic Environmental Research and Development Program (SERDP), Award OSR-2015-SEED-2450-01 from the King Abdullah University of Science and Technology (KAUST), the State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) (No. 2013DX01), and a scholarship from the China Scholarship Council (CSC).
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2016/11/3
Y1 - 2016/11/3
N2 - A new three-electrode electrocoagulation reactor was investigated to increase the rate of removal of phosphate from domestic wastewater. Initially, two electrodes (graphite plate and air cathode) were connected with 0.5 V of voltage applied for a short charging time (∼10 s). The direction of the electric field was then reversed, by switching the power supply lead from the anode to the cathode, and connecting the other lead to a sacrificial aluminum mesh anode for removal of phosphate by electrocoagulation. The performance of this process, called a reverse-electric field, air cathode electrocoagulation (REAEC) reactor, was tested using domestic wastewater as a function of charging time and electrocoagulation time. REAEC wastewater treatment removed up to 98% of phosphate in 15 min (inert electrode working time of 10 s, current density of 1 mA/cm2, and 15 min total electrocoagulation time), which was 6% higher than that of the control (no inert electrode). The energy demand varied from 0.05 kWh/m3 for 85% removal in 5 min, to 0.14 kwh/m3 for 98% removal in 15 min. These results indicate that the REAEC can reduce the energy demands and treatment times compared to conventional electrocoagulation processes for phosphate removal from wastewater.
AB - A new three-electrode electrocoagulation reactor was investigated to increase the rate of removal of phosphate from domestic wastewater. Initially, two electrodes (graphite plate and air cathode) were connected with 0.5 V of voltage applied for a short charging time (∼10 s). The direction of the electric field was then reversed, by switching the power supply lead from the anode to the cathode, and connecting the other lead to a sacrificial aluminum mesh anode for removal of phosphate by electrocoagulation. The performance of this process, called a reverse-electric field, air cathode electrocoagulation (REAEC) reactor, was tested using domestic wastewater as a function of charging time and electrocoagulation time. REAEC wastewater treatment removed up to 98% of phosphate in 15 min (inert electrode working time of 10 s, current density of 1 mA/cm2, and 15 min total electrocoagulation time), which was 6% higher than that of the control (no inert electrode). The energy demand varied from 0.05 kWh/m3 for 85% removal in 5 min, to 0.14 kwh/m3 for 98% removal in 15 min. These results indicate that the REAEC can reduce the energy demands and treatment times compared to conventional electrocoagulation processes for phosphate removal from wastewater.
UR - http://hdl.handle.net/10754/623557
UR - https://pubs.acs.org/doi/10.1021/acssuschemeng.6b01613
UR - http://www.scopus.com/inward/record.url?scp=85008477430&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.6b01613
DO - 10.1021/acssuschemeng.6b01613
M3 - Article
SN - 2168-0485
VL - 5
SP - 67
EP - 71
JO - ACS Sustainable Chemistry & Engineering
JF - ACS Sustainable Chemistry & Engineering
IS - 1
ER -