The role of biochar on alleviating ammonia toxicity in anaerobic digestion of nitrogen-rich wastes: a review

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dc.contributor.authorCai, Yafan
dc.contributor.authorZhu, Mingming
dc.contributor.authorMeng, Xingyao
dc.contributor.authorZhou, John L.
dc.contributor.authorZhang, Huan
dc.contributor.authorShen, Xia
dc.date.accessioned2022-03-13T20:14:15Z
dc.date.available2022-03-13T20:14:15Z
dc.date.issued2022-03-07
dc.description.abstractThis paper reviewed the mechanisms of biochar in relieving ammonia inhibition. Biochar affects nitrogen-rich waste's anaerobic digestion (AD) performance through four ways: promotion of direct interspecies electron transfer (DIET) and microbial growth, adsorption, pH buffering, and provision of nutrients. Biochar enhances the DIET pathway by acting as an electron carrier. The role of DIET in relieving ammonia nitrogen may be exaggerated because many related studies don't provide definite evidence. Therefore, some bioinformatics technology should be used to assist in investigating DIET. Biochar absorbs ammonia nitrogen by chemical adsorption (electrostatic attraction, ion exchange, and complexation) and physical adsorption. The absorption efficiency, mainly affected by the properties of biochar, pH and temperature of AD, can reach 50 mg g−1 on average. The biochar addition can buffer pH by reducing the concentrations of VFAs, alleviating ammonia inhibition. In addition, biochar can release trace elements and increase the bioavailability of trace elements.en_UK
dc.identifier.citationCai Y, Zhu M, Meng X, et al., (2022) The role of biochar on alleviating ammonia toxicity in anaerobic digestion of nitrogen-rich wastes: a review, Bioresource Technology, Volume 351, May 2022, Article number 126924en_UK
dc.identifier.eissn1873-2976
dc.identifier.issn0960-8524
dc.identifier.urihttps://doi.org/10.1016/j.biortech.2022.126924
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/17650
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAmmonia stressen_UK
dc.subjectAdsorptionen_UK
dc.subjectMicrobial immobilizationen_UK
dc.subjectDirect interspecies electron transferen_UK
dc.subjectBiocharen_UK
dc.titleThe role of biochar on alleviating ammonia toxicity in anaerobic digestion of nitrogen-rich wastes: a reviewen_UK
dc.typeArticleen_UK

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