An innovative 2-stage process for the recovery of phosphorus and recycling of ferric from ferric sludges generated in water and wastewater treatment

Mejia Likosova, E., Keller, J., Poussade, Y. and Freguia, S. (2014). An innovative 2-stage process for the recovery of phosphorus and recycling of ferric from ferric sludges generated in water and wastewater treatment. In: IAP 2014: Interfaces in Water and Environmental Science. Programme. IAP 2014: 8th International Conference on Interfaces against Pollution, De Harmonie, Leeuwarden, Netherlands, (45-45). 25-28 May, 2014.

Author Mejia Likosova, E.
Keller, J.
Poussade, Y.
Freguia, S.
Title of paper An innovative 2-stage process for the recovery of phosphorus and recycling of ferric from ferric sludges generated in water and wastewater treatment
Conference name IAP 2014: 8th International Conference on Interfaces against Pollution
Conference location De Harmonie, Leeuwarden, Netherlands
Conference dates 25-28 May, 2014
Proceedings title IAP 2014: Interfaces in Water and Environmental Science. Programme
Place of Publication Leeuwarden, Netherlands
Publisher Wetsus
Publication Year 2014
Sub-type Published abstract
Open Access Status
Start page 45
End page 45
Total pages 1
Language eng
Formatted Abstract/Summary
Ferric salts are used extensively in wastewater treatment to precipitate P, and as coagulant in water treatment. In all cases, large amounts of ferric sludge are produced. The ongoing chemical supply and sludge disposal represent a major operating cost to the water industry. A novel 2-stage process for Fe and P recovery from ferric phosphate sludge has been developed to enable the on-site recycling of ferric for such applications. In Stage I, PO4 is released in solution after the addition of a sulfide solution to initiate FeS precipitation. In Stage II, FeS is electrochemically oxidised to elemental sulfur that is deposited on the anode and generates a low-pH Fe solution for reuse. Simultaneously the cathodic reduction of sulfur forms sulfide, which can be reused in Stage I to create a fully integrated process...
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ

 
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Created: Thu, 11 Dec 2014, 10:10:56 EST by Elena Mejia Likosova on behalf of Advanced Water Management Centre