Optimization of liquid hot water pretreatment on Hybrid Pennisetum anaerobic digestion and its effect on energy efficiency

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dc.contributor.authorKang, Xihui
dc.contributor.authorZhang, Yi
dc.contributor.authorLin, Richen
dc.contributor.authorLia, Lianhua
dc.contributor.authorZhen, Feng
dc.contributor.authorKong, Xiaoying
dc.contributor.authorSun, Yongming
dc.contributor.authorYuan, Zhenhong
dc.contributor.funderNational Natural Science Foundation of Chinaen
dc.contributor.funderChinese Academy of Sciencesen
dc.contributor.funderScience and Technology Planning Project of Guangdong Provinceen
dc.contributor.funderScience and Technology Program of Guangzhouen
dc.contributor.funderAgricultural Technology Research and Development Project of Guangdong Provinceen
dc.contributor.funderHorizon 2020en
dc.contributor.funderHelmholtz Associationen
dc.contributor.funderOffice of the China Postdoctoral Councilen
dc.date.accessioned2020-04-27T10:17:54Z
dc.date.available2020-04-27T10:17:54Z
dc.date.issued2020-03-31
dc.date.updated2020-04-27T09:52:23Z
dc.description.abstractTo overcome the inherent complexity of lignocellulosic biomass and improve its biological conversion efficiency, the central composite surface response methodology was used to optimize the process variables (temperature, reaction time and liquid-to-solid ratio) in liquid hot water pretreatment for biomethane production from the anaerobic digestion of Hybrid Pennisetum (a typical energy crop in southern China). Temperature, reaction time and water content were varied between 160–200 °C, 20–60 min and 60–90 mL respectively. The biomethane yields from pretreated material were considered as response variables to different processes conditions. Results showed untreated Hybrid Pennisetum had a biomethane potential of 218.6 L/kg volatile solid (VS) (corresponding to a biodegradability of 62.6%). The effect of liquid hot water pretreatment on the biomethane yield was distinct. Pretreatment severities less than 4.55 resulted in increased biomethane yields. However, further increasing the severity led to lower biomethane yields. The optimum biomethane yield (290.6 L/kg VS) was obtained from pretreated Hybrid Pennisetum at 175 °C for 35 min, with the highest biodegradability of 83.2%. Energy balance showed that, under the optimal pretreatment condition, the highest energy conversion efficiency of 76.1% was attained in theory. If the process energy inputs are included, a process energy efficiency of 51.7% could be realized with proper heat recovery.en
dc.description.sponsorshipNational Natural Science Foundation of China (No. 51776208); Strategic Priority Research Program of Chinese Academy of Sciences (No. XDA21050400); Science and Technology Planning Project of Guangdong Province (No.2017B020238005); Science and Technology Program of Guangzhou (No. 201803030007); Agricultural Technology Research and Development Project of Guangdong Province (No. 2018LM2178); Office of the China Postdoctoral Council and Helmholtz Association (China and Germany Postdoctoral Exchange Program Grant No. ZD2018025)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid112718en
dc.identifier.citationKang, X., Zhang, Y., Lin, R., Lia, L., Zhen, F., Kong, X., Sun, Y. and Yuan, Z. (2020) 'Optimization of liquid hot water pretreatment on Hybrid Pennisetum anaerobic digestion and its effect on energy efficiency', Energy Conversion and Management, 210, 112718 (11pp). doi: 10.1016/j.enconman.2020.112718en
dc.identifier.doi10.1016/j.enconman.2020.112718en
dc.identifier.endpage11en
dc.identifier.issn0196-8904
dc.identifier.journaltitleEnergy Conversion and Managementen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/9855
dc.identifier.volume210en
dc.language.isoenen
dc.publisherElsevier Ltd.en
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::MSCA-IF-EF-ST/797259/EU/Direct Interspecies Electron Transfer in advanced anaerobic digestion system for gaseous transport biofuel production/DIETen
dc.rights© 2020, Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectAnaerobic digestionen
dc.subjectEnergy cropsen
dc.subjectEnergy efficiencyen
dc.subjectLiquid hot wateren
dc.subjectPretreatmenten
dc.subjectResponse surface methodologyen
dc.titleOptimization of liquid hot water pretreatment on Hybrid Pennisetum anaerobic digestion and its effect on energy efficiencyen
dc.typeArticle (peer-reviewed)en
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