Role of extracellular polymeric substances (EPS) production in bioaggregation: application to wastewater treatment.
Identifieur interne : 000112 ( Main/Exploration ); précédent : 000111; suivant : 000113Role of extracellular polymeric substances (EPS) production in bioaggregation: application to wastewater treatment.
Auteurs : Zhiji Ding [Italie] ; Isabelle Bourven [France] ; Gilles Guibaud [France] ; Eric D. Van Hullebusch [France] ; Antonio Panico [Italie] ; Francesco Pirozzi [Italie] ; Giovanni Esposito [Italie]Source :
- Applied microbiology and biotechnology [ 1432-0614 ] ; 2015.
Abstract
This paper reviews the formation, structure, and stability of bioaggregates with an emphasis on the composition and distribution of extracellular polymeric substances (EPS) and their role in bioaggregation. Bioaggregation is ubiquitous in natural environment and is of great importance in biological wastewater treatment processes. It greatly influences the flocculability, settleability, and dewaterability for flocs and sludge retention and shear resistance for biofilms. The physico-chemical and microbial structures of bioaggregates are dependent on operational conditions as well as microbial diversity and spatial distribution. The formation of bioaggregates is mediated by the physico-chemical interactions as well as the microbial interactions such as EPS production and quorum sensing. EPS are composed of a mixture of macromolecules including proteins, polysaccharides, humic-like substances, and nucleic acids, which entrap the microbial cells in a three-dimensional matrix. The composition and physico-chemical characteristics of EPS have significant influence on the maintenance of the bioaggregate structure and the process performance of the wastewater treatment. However, the mechanisms of bioaggregation are still unclear and the conclusions on the role of EPS were mostly drawn from the established correlations and hypotheses. This paper expects to provide up-to-date knowledge on bioaggregation and insights for further studies and applications.
DOI: 10.1007/s00253-015-6964-8
PubMed: 26381665
Affiliations:
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Bioaggregation is ubiquitous in natural environment and is of great importance in biological wastewater treatment processes. It greatly influences the flocculability, settleability, and dewaterability for flocs and sludge retention and shear resistance for biofilms. The physico-chemical and microbial structures of bioaggregates are dependent on operational conditions as well as microbial diversity and spatial distribution. The formation of bioaggregates is mediated by the physico-chemical interactions as well as the microbial interactions such as EPS production and quorum sensing. EPS are composed of a mixture of macromolecules including proteins, polysaccharides, humic-like substances, and nucleic acids, which entrap the microbial cells in a three-dimensional matrix. The composition and physico-chemical characteristics of EPS have significant influence on the maintenance of the bioaggregate structure and the process performance of the wastewater treatment. However, the mechanisms of bioaggregation are still unclear and the conclusions on the role of EPS were mostly drawn from the established correlations and hypotheses. This paper expects to provide up-to-date knowledge on bioaggregation and insights for further studies and applications.</div></front></TEI><affiliations><list><country><li>France</li><li>Italie</li></country><region><li>Limousin</li><li>Nouvelle-Aquitaine</li><li>Île-de-France</li></region><settlement><li>Limoges</li><li>Paris</li></settlement><orgName><li>Université de Limoges</li></orgName></list><tree><country name="Italie"><noRegion><name sortKey="Ding, Zhiji" sort="Ding, Zhiji" uniqKey="Ding Z" first="Zhiji" last="Ding">Zhiji Ding</name></noRegion><name sortKey="Esposito, Giovanni" sort="Esposito, Giovanni" uniqKey="Esposito G" first="Giovanni" last="Esposito">Giovanni Esposito</name><name sortKey="Panico, Antonio" sort="Panico, Antonio" uniqKey="Panico A" first="Antonio" last="Panico">Antonio Panico</name><name sortKey="Pirozzi, Francesco" sort="Pirozzi, Francesco" uniqKey="Pirozzi F" first="Francesco" last="Pirozzi">Francesco Pirozzi</name></country><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Bourven, Isabelle" sort="Bourven, Isabelle" uniqKey="Bourven I" first="Isabelle" last="Bourven">Isabelle Bourven</name></region><name sortKey="Guibaud, Gilles" sort="Guibaud, Gilles" uniqKey="Guibaud G" first="Gilles" last="Guibaud">Gilles Guibaud</name><name sortKey="Van Hullebusch, Eric D" sort="Van Hullebusch, Eric D" uniqKey="Van Hullebusch E" first="Eric D" last="Van Hullebusch">Eric D. 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