Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater

Yushi Tian; Weihua He; Xiuping Zhu; Wulin Yang; Nanqi Ren; Bruce E. Logan

doi:10.1021/acssuschemeng.6b01613

Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater

Yushi Tian, Weihua He, Xiuping Zhu, Wulin Yang, Nanqi Ren, Bruce E. Logan

Research output: Contribution to journal › Article › peer-review

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Abstract

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.

Original language	English (US)
Pages (from-to)	67-71
Number of pages	5
Journal	ACS Sustainable Chemistry & Engineering
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/acssuschemeng.6b01613
State	Published - Nov 3 2016
Externally published	Yes

Bibliographical note

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.

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10.1021/acssuschemeng.6b01613

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title = "Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater",

abstract = "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.",

author = "Yushi Tian and Weihua He and Xiuping Zhu and Wulin Yang and Nanqi Ren and Logan, {Bruce E.}",

note = "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.",

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AU - Tian, Yushi

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AU - Zhu, Xiuping

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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.

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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.

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JO - ACS Sustainable Chemistry & Engineering

JF - ACS Sustainable Chemistry & Engineering

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ER -

Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater

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