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Shewanella biofilm development and engineering for environmental and bioenergy applications
Affiliation:1. Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore;2. School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore;3. Interdisciplinary Graduate Programme, Graduate College, Nanyang Technological University, 637335, Singapore
Abstract:The genus Shewanella comprises about 70 species of Gram-negative, facultative anaerobic bacteria inhabiting various environments, which have shown great potential in various biotechnological applications ranging from environmental bioremediation, metal(loid) recovery and material synthesis to bioenergy generation. Most environmental and energy applications of Shewanella involve the biofilm mode of growth on surfaces of solid minerals or electrodes. In this article, we first provide an overview of Shewanella biofilm biology with the focus on biofilm dynamics, biofilm matrix, and key signalling systems involved in Shewanella biofilm development. Then we review strategies recently exploited to engineer Shewanella biofilms to improve biofilm-mediated bioprocesses.
Keywords:Biofilm  Biofilm engineering  c-di-GMP  Quorum sensing  Extracellular electron transfer
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