Solid-state fermentation of soybean residues for bioflocculant production in a pilot-scale bioreactor system
Zulkeflee, Zufarzaana (University Putra Malaysia. Department of Environmental Sciences)
Sanchez, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2014
Abstract:	An innovative approach using soybean residues for the production of bioflocculants through solid-state fermentation was carried out in 4. 5 L near-to-adiabatic bioreactors at pilot-scale level. An added inoculum of the strain Bacillus subtilis UPMB13 was tested in comparison with control reactors without any inoculation after the thermophilic phase of the fermentation. The flocculating performances of the extracted bioflocculants were tested on kaolin suspensions, and crude bioflocculants were obtained from 20 g of fermented substrate through ethanol precipitation. The production of bioflocculants was observed to be higher during the death phase of microbial growth. The bioflocculants were observed to be granular in nature and consisted of hydroxyl, carboxyl and methoxyl groups that aid in their flocculating performance. The results show the vast potential of the idea of using wastes to produce bioactive materials that can replace the current dependence on chemicals, for future prospect in water treatment applications.
Grants:	Ministerio de Economía y Competitividad CTM2012-33663
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Bacillus subtilis ; Bioflocculant ; Pilot scale ; Solid-state fermentation ; Soybean wastes
Published in:	Water science and technology, Vol. 70, issue 6 (Sep. 2014) , p. 1032-1039, ISSN 0273-1223

DOI: 10.2166/wst.2014.329

Preprint 13 p, 1.2 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > Composting Research Group (GICOM)
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