Reference : Treatment of gypsum waste in a two stage anaerobic reactor
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
Life sciences : Environmental sciences & ecology
Life sciences : Biotechnology
http://hdl.handle.net/2268/23599
Treatment of gypsum waste in a two stage anaerobic reactor
English
Deswaef, Sophie [> > > >]
Salmon, Thierry mailto [Université de Liège - ULg > Département de chimie appliquée > Département de chimie appliquée >]
Hiligsmann, Serge mailto [Université de Liège - ULg > Département des sciences de la vie > Biochimie et microbiologie industrielles >]
Taillieu, Xavier [> > > >]
Milande, Nicolas [BERTIN S.A. Tarnos, France > > > > > >]
Thonart, Philippe mailto [Université de Liège - ULg > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech - Biochimie et microbiologie industrielles >]
Crine, Michel mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
1996
Water Science & Technology
IWA Publishing
34
5-6
367-374
Yes (verified by ORBi)
International
0273-1223
London
United Kingdom
[en] gypsum ; sulphate-reducing bacteria ; acidogenic bacteria ; volatile fatty acids ; fixed biomass
[en] The reduction of high concentrations of gypsum (up to 110 kg/m(3)) is investigated in a two stage immobilised cell bioreactor. The first stage is mainly colonised by a consortium of acidogenic bacteria and sulphate reducing bacteria oxidising volatile fatty acids with more than 2 carbons (mainly, butyrate and propionate). The gypsum consumption rate is rather high (ii kg/m(3).day). Most of acetate remains unconverted in this first stage. It is partially converted in the second stage (residence time : 12 days) which is predominantly colonised by acetate oxidising bacteria The gypsum consumption rate is much lower than in the first stage : 3 kg/m(3).day. With both stages, it is possible to reach an almost complete conversion of gypsum with an overall capacity of 6.1 kg gypsum/m(3).day. We propose also a very simple model to describe the different transformation rates. It allows us to clearly identify the activity levels of the different types of sulphate reducing bacteria in both stages. Copyright (C) 1996 IAWQ.
Union Européenne = European Union - UE = EU
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http://hdl.handle.net/2268/23599

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