Journal
BIORESOURCE TECHNOLOGY
Volume 297, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122505
Keywords
RCPH-biochar; Cornstalk hydrolysate; Hydrogen production; Comprehension cornstalk utilization
Funding
- National Natural Science Foundation of China [31800115, 31870110]
- China Postdoctoral Science Foundation [2018M640299]
- Heilongjiang Postdoctoral Foundation [LBH-Z18091]
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology
- Fundamental Research Funds for the Central Universities
- NSRIF [201859]
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This study presents a novel approach based on addition of biochar generated from residue of cornstalk left after pretreatment and hydrolysis (RCPH-biochar) to improve hydrogen production from cornstalk hydrolysate. RCPH-biochar at concentration of 15 g L-1 substantially enhanced hydrogen generation during batch tests, with the highest cumulative hydrogen volume (3990 mL L-1) being 1.7 times that without RCPH-biochar. Then, continuous hydrogen production performance demonstrated that RCPH-biochar was capable of retaining biomass in the reactor, at 6 h hydraulic retention time, hydrogen production rate (22.8 mmol H-2 L-1 h(-1)) was tripled compared to the control, meanwhile, glucose and xylose utilization reached to 82.3% and 54.6%, respectively. Overall material balance indicates continuous hydrogen production with RCPH-biochar enabled 63.4% higher cornstalk transfer to H-2 and 53.3% more cornstalk utilization. The findings reported is a closed-loop process and is economically and environmentally attractive, which might support comprehensive cornstalk utilization with less energy input in the future.
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