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 journalArticle

14 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)67-71
Number of pages5
JournalACS Sustainable Chemistry and Engineering
Volume5
Issue number1
DOIs
StatePublished - Jan 3 2017

Fingerprint

Phosphates
Wastewater
Cathodes
phosphate
wastewater
Electric fields
electric field
electrode
Air
Electrodes
air
Anodes
Graphite electrodes
Aluminum
Wastewater treatment
density current
Current density
graphite
reactor
removal

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

Cite this

Tian, Yushi ; He, Weihua ; Zhu, Xiuping ; Yang, Wulin ; Ren, Nanqi ; Logan, Bruce E. / Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater. In: ACS Sustainable Chemistry and Engineering. 2017 ; Vol. 5, No. 1. pp. 67-71.
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Improved Electrocoagulation Reactor for Rapid Removal of Phosphate from Wastewater. / Tian, Yushi; He, Weihua; Zhu, Xiuping; Yang, Wulin; Ren, Nanqi; Logan, Bruce E.

In: ACS Sustainable Chemistry and Engineering, Vol. 5, No. 1, 03.01.2017, p. 67-71.

Research output: Contribution to journalArticle

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