LEADER 03540nam 2200397z- 450 001 9910346735103321 005 20210211 035 $a(CKB)4920000000094359 035 $a(oapen)https://directory.doabooks.org/handle/20.500.12854/46136 035 $a(oapen)doab46136 035 $a(EXLCZ)994920000000094359 100 $a20202102d2018 |y 0 101 0 $aeng 135 $aurmn|---annan 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aElectrochemically Active Microorganisms 210 $cFrontiers Media SA$d2018 215 $a1 online resource (218 p.) 225 1 $aFrontiers Research Topics 311 08$a2-88945-651-X 330 $aMicrobial electrochemical systems (MESs, also known as bioelectrochemical systems (BESs) are promising technologies for energy and products recovery coupled with wastewater treatment, and have attracted increasing attention. Many studies have been conducted to expand the application of MESs for contaminants degradation and bioremediation, and increase the efficiency of electricity production by optimizing architectural structure of MESs, developing new electrode materials, etc. However, one of the big challenges for researchers to overcome, before MESs can be used commercially, is to improve the performance of the biofilm on electrodes so that 'electron transfer' can be enhanced. This would lead to greater production of electricity, energy or other products. Electrochemically active microorganisms (EAMs) are a group of microorganisms which are able to release electrons from inside their cells to an electrode or accept electrons from an electron donor. The way in which EAMs do this is called 'extracellular electron transfer' (EET). So far, two EET mechanisms have been identified: direct electron transfer from microorganisms physically attached to an electrode, and indirect electron transfer from microorganisms that are not physically attached to an electrode. 1) Direct electron transfer between microorganisms and electrode can occur in two ways: a) when there is physical contact between outer membrane structures of the microbial cell and the surface of the electrode, b) when electrons are transferred between the microorganism and the electrode through tiny projections (called pili or nanowires) that extend from the outer membrane of the microorganism and attach themselves to the electrode. 2) Indirect transfer of electrons from the microorganisms to an electrode occurs via long-range electron shuttle compounds that may be naturally present (in wastewater, for example), or may be produced by the microorganisms themselves. The electrochemically active biofilm, which degrades contaminants and produces electricity in MESs, consists of diverse community of EAMs and other microorganisms. However, up to date only a few EAMs have been identified, and most studies on EET have focused on the two model species of Shewanella oneidensis and Geobacter sulfurreducens. 606 $aMicrobiology (non-medical)$2bicssc 610 $abioelectrochemical systems (BESs) 610 $aElectrochemically active microorganisms (EAMs) 610 $aextracellular electron transfer 610 $aMicrobial electrochemical systems (MESs) 615 7$aMicrobiology (non-medical) 700 $aHaoyi Cheng$4auth$01331073 702 $aYong Xiao$4auth 702 $aFeng Zhao$4auth 906 $aBOOK 912 $a9910346735103321 996 $aElectrochemically Active Microorganisms$93040101 997 $aUNINA