Ammonia inhibition and toxicity in anaerobic digestion: a critical review

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dc.contributor.authorJiang, Ying
dc.contributor.authorMcAdam, Ewan
dc.contributor.authorZhang, Yue
dc.contributor.authorHeaven, Sonia
dc.contributor.authorBanks, Charles J.
dc.contributor.authorLonghurst, Philip
dc.date.accessioned2019-07-23T15:46:39Z
dc.date.available2019-07-23T15:46:39Z
dc.date.issued2019-07-20
dc.description.abstractAs a waste management technology which offers environmental benefit and renewable energy production, anaerobic digestion (AD) has become the preferred technology for the treatment of organic waste. However, in such waste streams nitrogen contents are likely to be high. There is prevailing literature evidence suggests that high ammonia concentration especially its free molecular form (NH3), derived from nitrogen content in substrates is the cause of inhibition and sudden failure of the AD process. This paper comprehensively reviews previous knowledge from digestion studies using high nitrogen waste streams as feedstocks and critically analysed the considerable variations in the inhibition/toxicity levels reported for ammonia. Literature evidences suggest methanogens, particularly acetoclastic methanogens are most susceptible to ammonia toxicity, and therefore this review has a particular focus on the mechanism of the ‘selective’ inhibition to methanogens and the impact of ammonia toxicity to the overall methanogen population in an AD digester. This population change explains in many reported cases that sufficient acclimatisation can significantly alleviate the phenomenon of inhibition and specific requirement of certain trace nutrients. Currently available mitigation strategies for high nitrogen content feedstock digestion are reviewed and discussed in relation to the population change and trace nutrient requirements.en_UK
dc.identifier.citationJiang Y, McAdam E, Zhang Y, et al., (2019) Ammonia inhibition and toxicity in anaerobic digestion: a critical review. Journal of Water Process Engineering, Volume 32, December 2019, Article number 100899en_UK
dc.identifier.issn2214-7144
dc.identifier.urihttps://doi.org/10.1016/j.jwpe.2019.100899
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/14385
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relation.ispartofseries;100899
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectAnaerobic Digestionen_UK
dc.subjectMethanogenesisen_UK
dc.subjectToxicityen_UK
dc.subjectAmmoniaen_UK
dc.titleAmmonia inhibition and toxicity in anaerobic digestion: a critical reviewen_UK
dc.typeArticleen_UK

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