文献类型：期刊文献

英文题名：Starch hydrolysis in autogenerative high pressure digestion: Gelatinisation and saccharification as rate limiting steps

作者：Lindeboom, Ralph E. F.[1];Ding, Lei[2];Weijma, Jan[1];Plugge, Caroline M.[3];van Lier, Jules B.[4]

机构：[1]Wageningen Univ, Subdept Environm Technol, NL-6700 EV Wageningen, Netherlands;[2]E China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Wageningen Univ, Microbiol Lab, NL-6703 HB Wageningen, Netherlands;[4]Delft Univ Technol, Fac Civil Engn & Geosci, Dept Water Management, Sect Sanit Engn, NL-2600 GA Delft, Netherlands

年份：2014

卷号：71

起止页码：256

外文期刊名：BIOMASS & BIOENERGY

收录：;EI(收录号：20144800266482);WOS:【SCI-EXPANDED(收录号:WOS:000345349500025)】；

基金：Primarily, we would like to show our gratitude to Agentschap Nl, a subsidiary of the Dutch Ministry of Economic Affairs for financially supporting this research (EOS-LT07047). Also, we would like to thank, the Chinese government for the scholarship provided to Lei Ding. Furthermore, we are grateful to Margaret Bosveld of the laboratory of Food Chemistry (Wageningen University) for her help and discussion on the HPSEC and Ben van de Broek of Wageningen UR, Food & Biobased Research, for his help on obtaining and interpreting the HPAEC results. Finally, we would also like to thank Kirsten Zagt of Bareau B.V. for the interesting discussions on the application of this

语种：英文

外文关键词：Anaerobic digestion; Pressure; Gelatinization; Saccharification; Starch hydrolysis; Rate-limitation

摘要：Autogenerative high pressure digestion (AHPD) provides an integrated biogas upgrading technology, capable of producing biogas with a CH4 content exceeding 95% at pressures up to 90 bar. Hydrolysis is generally regarded as the rate-limiting step in the anaerobic digestion of complex organic matter, governing the volatile fatty acid (VFA) production rate for subsequent conversion to methane. Starch hydrolysis rates in AHPD systems were studied and the potential risk for VFA accumulation was assessed. Under the anticipated practical moderate pressure conditions at 30 degrees C, experimental CH4-content of the biogas improved from 49 to 73 +/- 2% at atmospheric and elevated pressure, respectively. Furthermore, no significant effect of pressure on the hydrolysis was found. Like under atmospheric pressure, gelatinisation was the rate-limiting step for particulate starch (0.05 d(-1)) and saccharification for gelatinised starch (0.1 d(-1)). Because no effect was observed on starch, an effect on the hydrolysis rate of more complex organic matter like (ligno-)cellulose is also not anticipated. (C) 2014 Elsevier Ltd. All rights reserved.