Microbial capacitive desalination for integrated organic and salt removal and energy production from shale gas wastewater

Casey Forrestal, Alexander Haeger, Zhiyong Ren

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This study presents a new technology called microbial capacitive desalination (MCD) that is capable of removing organic contaminants and salts in one reactor and at the same time producing electrical energy. The technology can be used in different areas, and in this case study we successfully applied it to shale oil/gas wastewater treatment. In lab scale reactors, the MCD was able to remove total dissolved solids (TDS) at the rate of 2,760 mg TDS/L/hr and chemical oxygen demand (COD) at a combined rate of 170 mg COD/L/hr, respectively. The MCD had a Coulombic efficiency of 21.3%, and during capacitive discharge, 1789 mJ energy was harvested on per gram of electrode. The 200-gallon per day pilot system showed a higher power generation at 88 W/m3 and similar desalination performance. We also developed micro-controller based real-time monitoring system for automation and remote operation.

Original languageEnglish (US)
Title of host publication88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015
PublisherWater Environment Federation
Pages4503-4508
Number of pages6
ISBN (Electronic)9781510870468
StatePublished - Jan 1 2015
Event88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015 - Chicago, United States
Duration: Sep 26 2015Sep 30 2015

Publication series

Name88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015
Volume8

Conference

Conference88th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2015
CountryUnited States
CityChicago
Period9/26/159/30/15

All Science Journal Classification (ASJC) codes

  • Ecological Modeling
  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal
  • Water Science and Technology

Keywords

  • Capacitive deionization
  • Microbial electrochemical technology
  • Produced water
  • Shale gas

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