Syntrophy Goes Electric: Direct Interspecies Electron Transfer

Annual Review of Microbiology, Год журнала: 2017, Номер 71(1), С. 643 - 664

Опубликована: Июль 12, 2017

Direct interspecies electron transfer (DIET) has biogeochemical significance, and practical applications that rely on DIET or DIET-based aspects of microbial physiology are growing. Mechanisms for have primarily been studied in defined cocultures which Geobacter species one the partners. Electrically conductive pili (e-pili) can be an important electrical conduit DIET. However, there may instances contacts made between transport proteins associated with outer membranes Alternatively, partners plug into carbon materials, such as granular activated carbon, cloth, biochar, long-range exchange without need e-pili. Magnetite promotes DIET, possibly by acting a substitute outer-surface c-type cytochromes. is primary mode some anaerobic digesters converting wastes to methane. Promoting materials shows promise stabilizing accelerating methane production digesters, permitting higher organic loading rates. Various lines evidence suggest terrestrial wetlands, source atmospheric also role oxidation coupled sulfate reduction, control releases. The finding serve electrons photosynthesis further broadens its potential environmental significance. Microorganisms capable good catalysts several bioelectrochemical technologies e-pili promising renewable electronic materials. study early stages, additional investigation required better understand diversity microorganisms importance flow environments, biochemistry

Язык: Английский

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The role of additives on anaerobic digestion: A review

Renewable and Sustainable Energy Reviews, Год журнала: 2016, Номер 58, С. 1486 - 1499

Опубликована: Фев. 2, 2016

Язык: Английский

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Direct interspecies electron transfer via conductive materials: A perspective for anaerobic digestion applications

Bioresource Technology, Год журнала: 2018, Номер 254, С. 300 - 311

Опубликована: Фев. 2, 2018

Язык: Английский

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Enhancing anaerobic digestion of complex organic waste with carbon-based conductive materials

Bioresource Technology, Год журнала: 2016, Номер 220, С. 516 - 522

Опубликована: Сен. 8, 2016

Язык: Английский

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Methane Production and Conductive Materials: A Critical Review

Environmental Science & Technology, Год журнала: 2018, Номер 52(18), С. 10241 - 10253

Опубликована: Авг. 17, 2018

Conductive materials (CM) have been extensively reported to enhance methane production in anaerobic digestion processes. The occurrence of direct interspecies electron transfer (DIET) microbial communities, as an alternative or complementary indirect (via hydrogen formate), is the main explanation given justify improvement production. Not disregarding that DIET can be promoted presence certain CM, it surely does not explain all observations. In fact, methanogenic environments was only unequivocally demonstrated cocultures Geobacter metallireducens with Methanosaeta harundinacea Methanosarcina barkeri and frequently sp. are detected improved driven systems. Furthermore, conductive carbon nanotubes were shown accelerate activity methanogens growing pure cultures, where expected occur, hydrogenotrophic ubiquitous full-scale digesters treating for example brewery wastewaters, indicating important mechanism those This paper presents overview effect several iron-based carbon-based CM bioengineered systems, focusing on communities' changes. Control assays, fundamental elements support major conclusions experiments, critically revised discussed.

Язык: Английский

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Advances towards understanding and engineering direct interspecies electron transfer in anaerobic digestion

Bioresource Technology, Год журнала: 2017, Номер 244, С. 698 - 707

Опубликована: Авг. 8, 2017

Язык: Английский

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Happy together: microbial communities that hook up to swap electrons

The ISME Journal, Год журнала: 2016, Номер 11(2), С. 327 - 336

Опубликована: Ноя. 1, 2016

Язык: Английский

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Towards engineering application: Potential mechanism for enhancing anaerobic digestion of complex organic waste with different types of conductive materials

Water Research, Год журнала: 2017, Номер 115, С. 266 - 277

Опубликована: Март 1, 2017

Язык: Английский

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Role and Potential of Direct Interspecies Electron Transfer in Anaerobic Digestion

Energies, Год журнала: 2018, Номер 11(1), С. 107 - 107

Опубликована: Янв. 3, 2018

Anaerobic digestion (AD) is an effective biological treatment for stabilizing organic compounds in waste/wastewater and simultaneously producing biogas. However, it often limited by the slow reaction rates of different microorganisms’ syntrophic metabolisms. Stable fast interspecies electron transfer (IET) between volatile fatty acid-oxidizing bacteria hydrogenotrophic methanogens crucial efficient methanogenesis. In this interaction, electrons are exchanged via redox mediators such as hydrogen formate. Recently, direct IET (DIET) has been revealed important route AD. Microorganisms undergoing DIET form electrical connections membrane-associated cytochromes conductive pili; thus, not required exchange. This indicates that more thermodynamically favorable than indirect IET. Recent studies have shown materials (e.g., iron oxides, activated carbon, biochar, carbon fibers) can mediate DIET. attach to materials’ surfaces or vice versa according particle size, biofilms aggregates. Different promote improve AD performance digesters treating feedstocks, potentially suggesting a new approach enhancing performance. review discusses role potential methanogenic systems, especially with promoting

Язык: Английский

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Biogas production through syntrophic acetate oxidation and deliberate operating strategies for improved digester performance

Applied Energy, Год журнала: 2016, Номер 179, С. 124 - 135

Опубликована: Июль 4, 2016

Anaerobic degradation of protein-rich materials has high methane potential and produces nutrient-rich residue, but requires strategies to avoid ammonia inhibition. A well-adapted process can cope with substantially higher levels than an unadapted analyses pathways for methanisation acetate, combined determination microbial community structure, strongly indicate that this is due a significant contribution syntrophic acetate oxidation. The microorganisms involved in oxidation thus most likely occupy unique niche play important role formation. This review summarises current insight oxidising microorganisms, their presence the detection novel species relate these observations operating conditions biogas processes order explore contributing factors development ammonia-tolerant efficiently degrades through pathway. Besides level, concentration, temperature methanogenic structure are considered as shape influence SAO-mediated ecosystems. main purpose facilitate optimisation considering activity growth key community.

Язык: Английский

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