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Title: Insights into anaerobic transformation of key dissolved organic matters produced by thermal hydrolysis sludge pretreatment
Authors: Lu, Dan
Sun, Faqian
Zhou, Yan
Keywords: Engineering::Environmental engineering
Issue Date: 2018
Source: Lu, D., Sun, F., & Zhou, Y. (2018). Insights into anaerobic transformation of key dissolved organic matters produced by thermal hydrolysis sludge pretreatment. Bioresource Technology, 266, 60-67. doi:10.1016/j.biortech.2018.06.059
Journal: Bioresource technology
Abstract: The detailed dissolved organic matters (DOMs) profile by thermal hydrolysis pretreatment and their transformation during anaerobic digestion (AD) were investigated. Among the temperature tested, 172 °C treatment showed the best sludge solubilization and the maximum methane production. The study revealed that high temperature sludge pretreatment mainly improved the release of low molecular weight (LMW) proteins, LMW neutrals and LMW polysaccharides. Notably, the effluent from thermal treated sludge digesters contained more DOMs residues. The predominant residual DOMs were humic substances, LMW proteins and LMW neutrals. At the molecular level, over 50% of the residual LMW components were slowly biodegradable or nonbiodegradable steroid-like compounds and aromatics. Further profiling of the higher MW compounds detected the recalcitrant or inhibitory compounds, e.g. benzenoids, flavonoids, pyridines and their derivatives. It is recommended that polishing step should be considered to further reduce the refractory residues in AD liquor.
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2018.06.059
Rights: © 2018 Elsevier Ltd. All rights reserved. This paper was published in Bioresource technology and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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