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Anaerobic bioflocculation of wool scouring effluent: The influence of non-ionic surfactant on efficiency

Charles, W., Ho, G. and Cord-Ruwisch, R. (1996) Anaerobic bioflocculation of wool scouring effluent: The influence of non-ionic surfactant on efficiency. Water Science and Technology, 34 (11). pp. 1-8.

Link to Published Version: http://dx.doi.org/10.1016/S0273-1223(96)00814-1
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Abstract

Wool scouring effluent (WSE) contains high concentrations of wool grease emulsified by non-ionic surfactants (nonylphenol polyethoxylates - NPEO). The short-term treatment (1-7 days) of this effluent with anaerobic bacteria resulted in partial grease nocculation. However the efficiency of this process varied largely (30% to 80%) with the source of wool Scouring effluent used. The concentration of free surfactant, rather than total surfactant, was found to be the likely reason for the variation in efficiency. In order to elucidate the mechanisms of anaerobic biological flocculation a detailed surfactant analysis was performed. This revealed that anaerobic microbes (taken from sludge of a municipal wastewater treatment plant) had anability to partially degrade NPEO by shortening the hydrophilic ethoxylate chain causing coagulation and subsequent flocculation of wool grease from the liquor.

Publication Type: Journal Article
Murdoch Affiliation: School of Biological and Environmental Sciences
Publisher: International Water Association Publishing
Copyright: © IWA Publishing
Notes: Paper presented at the 18th Biennial Conference of the International Association on Water Quality. Singapore, Singapore; 23 June 1996 through 28 June 1996
URI: http://researchrepository.murdoch.edu.au/id/eprint/5083
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