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Desalination and Water Treatment Volume 57, 2016 - Issue 11
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Articles

Recovery of mixed acid and base from wastewater with bipolar membrane electrodialysis—a case study

Fatih IlhanFaculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Davutpasa Campus, Davutpasa, Esenler, 34220Istanbul, Turkey, Tel. +90 212 383 53 96; Fax: +90 212 383 53 58, Tel. +90 212 383 53 75; Fax: +90 212 383 53 58, Tel. +90 212 383 53 92; Fax: +90 212 383 53 58, Tel. +90 212 383 53 88; Fax: +90 212 383 53 58Correspondence[email protected]
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Harun Akif KabukFaculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Davutpasa Campus, Davutpasa, Esenler, 34220Istanbul, Turkey, Tel. +90 212 383 53 96; Fax: +90 212 383 53 58, Tel. +90 212 383 53 75; Fax: +90 212 383 53 58, Tel. +90 212 383 53 92; Fax: +90 212 383 53 58, Tel. +90 212 383 53 88; Fax: +90 212 383 53 58Correspondence[email protected]
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Ugur KurtFaculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Davutpasa Campus, Davutpasa, Esenler, 34220Istanbul, Turkey, Tel. +90 212 383 53 96; Fax: +90 212 383 53 58, Tel. +90 212 383 53 75; Fax: +90 212 383 53 58, Tel. +90 212 383 53 92; Fax: +90 212 383 53 58, Tel. +90 212 383 53 88; Fax: +90 212 383 53 58Correspondence[email protected]
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Yasar AvsarFaculty of Civil Engineering, Department of Environmental Engineering, Yildiz Technical University, Davutpasa Campus, Davutpasa, Esenler, 34220Istanbul, Turkey, Tel. +90 212 383 53 96; Fax: +90 212 383 53 58, Tel. +90 212 383 53 75; Fax: +90 212 383 53 58, Tel. +90 212 383 53 92; Fax: +90 212 383 53 58, Tel. +90 212 383 53 88; Fax: +90 212 383 53 58Correspondence[email protected]
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M. Talha GonulluFaculty of Engineering, Department of Environmental Engineering, Adiyaman University, Adiyaman University Rectorate Building, 3005 Street Number: 13, 02040Adiyaman, Turkey, Tel. +90 416 223 38 40; Fax: +90 416 223 38 43Correspondence[email protected]
Pages 5165-5173 | Received 11 Jul 2014, Accepted 14 Dec 2014, Published online: 13 Jan 2015
 
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Abstract

The current study simultaneously examined the treatability of wastewater by electrodialysis unit and recovery of ions removed as acidic/alkaline solutions. With a bipolar membrane electrodialysis process, the removed ions are stored separately in anolyte/catholyte solutions, and then turned into mixed acids and bases. After the treatment of the leachate using the BMED process, the molar concentration of H+ ions in the acidic solution and the OH− ions in the alkaline solution reached up to 0.095 and 0.048 M (conditions: 1 L wastewater and 1 L anolyte/catholyte solutions), respectively. When the ratio of wastewater to initial volume of anolyte and catholyte was ¼ (1 L wastewater and 0.25 L anolyte or catholyte solutions) at the end of a 360-min treatment period, 3.8- (from 0.01995 to 0.07586 M for [H+]) and 3.98- (from 0.02344 to 0.09333 M for [OH−]) times more intense acid and base concentrations were determined, respectively. This demonstrates that the process can be considered as a cleaner technology for the treatability of wastewater by obtaining more concentrated acid and base as recovered material and fewer byproducts.

Acknowledgment

The authors would like to thank TUBITAK (The Scientific and Technological Research Council of Turkey) for financially supporting this study (Project name: TUBITAK CAYDAG-109Y285).

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