Journal
BIORESOURCE TECHNOLOGY
Volume 244, Issue -, Pages 1150-1157Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.08.067
Keywords
Energy crop; Alkaline pretreatment; Enzymatic digestibility; Biogas production; Benefit-cost analysis
Funding
- National Institute of Food and Agriculture, U.S. Department of Agriculture [2012-10008-20302]
- Collaborative Innovation Center of Biomass Energy, Henan Province (China)
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NaOH pretreatment with leachate reuse and Ca(OH)(2) pretreatment were compared for improved enzymatic digestibility and biogas production from giant reed, a promising energy crop. The NaOH pretreatment with leachate reuse increased glucose yields during enzymatic hydrolysis by 2.6-fold, and methane yields during anaerobic digestion by 1.4-to 1.6-fold. However, NaOH pretreatment had a negative net benefit (i.e., revenue from increased energy production minus chemical cost). Pretreatment with 7-20% Ca(OH)(2) not only improved glucose yield and methane yield by up to 2.3-fold and 1.4-fold, respectively, but also obtained a net benefit of $1.1-5.8/tonne dry biomass. Thus, Ca(OH)(2) pretreatment was shown to be more feasible than NaOH pretreatment for biogas production from giant reed.
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