Electrochemical analysis of a microbial electrochemical snorkel in laboratory and constructed wetlands

Abstract

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Challenges and applications of nitrate-reducing microbial biocathodes

“…Recently, the possibility of applying the MES composed of stainless steel electrodes immersed in sediment and in water for nitrate reduction was analyzed [85]. In this study, the principle of the MES was confirmed by measuring continuously the current flowing in shortcircuit from the anodic to the cathodic sides and nitrate addition induced clearly an increase of the biocathodic activity.…”

Aerobic denitrification with an electrode as the sole electron and energy source

“…20 Alternatively, electro-active bacteria can use an electrode as an electron and energy source for reducing nitrate in a promising process called bioelectrochemical denitrification (or electrotrophic denitrification). 21,22 In this process, the electrode (cathode) acts as an inexhaustible electron source avoiding the need for a continuous supply of external chemical compounds for denitrification of wastewater with low availability of carbon sources. [23][24][25][26][27] Furthermore, the application of bioelectrochemical denitrification under aerobic conditions allows ammonia removal to be performed in the same reactor.…”

Evaluation of environmental performance and selection of the most suitable system for MFCs with different electron acceptors by life cycle assessment and PROMETHEE approach

“…The nitrate-reducing bio-cathodes can efficiently treat nitratepolluted wastewater. 15 Conventional treatment methods require the addition of energy and organic matter. The use of autotrophic denitrification is preferred to remove nitrate from groundwater with low organic matter content and high nitrate level, which is planned to be used as a drinking water source.…”