Applied Biochemistry and Biotechnology

, Volume 172, Issue 5, pp 2670–2681 | Cite as

Anaerobic Digestion of Yard Waste with Hydrothermal Pretreatment

  • Wangliang Li
  • Guangyi Zhang
  • Zhikai Zhang
  • Guangwen Xu
Article

Abstract

The digestibility of lignocellulosic biomass is limited by its high content of refractory components. The objective of this study is to investigate hydrothermal pretreatment and its effects on anaerobic digestion of sorted organic waste with submerged fermentation. Hydrothermal pretreatment (HT) was performed prior to anaerobic digestion, and three agents were examined for the HT: hot compressed water, alkaline solution, and acidic solution. The concentrations of glucose and xylose were the highest in the sample pretreated in acidic solution. Compared with that of the untreated sample, the biogas yields from digesting the samples pretreated in alkaline solution, acidic solution, and hot water increased by 364, 107, and 79 %, respectively. The decrease of chemical oxygen demand (COD) in liquid phase followed the same order as for the biogas yield. The initial ammonia content of the treated samples followed the order sample treated in acidic solution > sample treated in alkaline solution > sample treated in hot water. The concentrations of volatile fatty acids (VFAs) were low, indicating that the anaerobic digestion process was running at continuously stable conditions.

Keywords

Anaerobic digestion Hydrolysis Hydrothermal Biogas Municipal solid wastes 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Wangliang Li
    • 1
  • Guangyi Zhang
    • 1
  • Zhikai Zhang
    • 1
    • 2
  • Guangwen Xu
    • 1
  1. 1.State Key Laboratory of Multi-phase Complex Systems, Institute of Process EngineeringChinese Academy of SciencesBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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