Electrochemical sulfide removal and recovery from paper mill anaerobic treatment effluent

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Paritam K. Dutta
  • Korneel Rabaey
  • Zhiguo Yuan
  • René A. Rozendal
  • Jürg Keller

Detail(s)

Original languageEnglish
Pages (from-to)2563-2571
Journal / PublicationWater Research
Volume44
Issue number8
Publication statusPublished - Apr 2010
Externally publishedYes

Abstract

Sulfide can be removed from wastewater and recovered as elemental sulfur using an electrochemical process. Recently, we demonstrated this principle of product recovery on synthetic feeds. Here, we present a lab scale electrochemical reactor continuously removing sulfide from the effluent of an anaerobic treatment process operated on paper mill wastewater. The effluent contained 44 ± 7 mg of sulfide-S L-1. Sulfide was reduced to 8 ± 2 mg-S L-1, at a removal rate of 0.845 ± 0.133 kg-S m-3 of total anodic compartment (TAC) d-1. The removed sulfide was recovered (75 ± 4% recovery) as pure concentrated alkaline sulfide/polysulfide solution, from which solid elemental sulfur was obtained. The electrochemical sulfide removal was not affected by different soluble constituents or particulate materials present in the wastewater. However, over time sulfide removal decreased due to biological sulfur reduction using the organics present in the wastewater. Therefore, a periodic switching strategy between anode and cathode was developed. Biofilm formation was avoided as the pH of the cathode solution increased to inhibitory levels during cathodic operation, while still allowing full recovery of the sulfur as end product. © 2010 Elsevier Ltd.

Research Area(s)

  • Biofilm, Electrochemical, Paper mill wastewater, Recovery, Sulfide removal, Sulfur

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Electrochemical sulfide removal and recovery from paper mill anaerobic treatment effluent. / Dutta, Paritam K.; Rabaey, Korneel; Yuan, Zhiguo et al.
In: Water Research, Vol. 44, No. 8, 04.2010, p. 2563-2571.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review