Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 8, Issue 17, Pages 6713-6721Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.0c00633
Keywords
Ensiling; Lactic acid fermentation; Butyric acid fermentation; Methane yield; Wilted maize stover; Clostridium tyrobutyricum; CaCO3
Categories
Funding
- National Natural Science Foundation of China [51608523]
- National Key Research and Development Plan [2018YFD0800100]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [328017493/GRK 2366]
Ask authors/readers for more resources
The performance of conventional processes for ensiling crop residues for biogas production is usually enhanced with lactic acid fermentation to reduce organic matter (OM) loss. In this study, butyric acid fermentation in the ensiling process of wilted maize stover (WMS) with glucose was directly and indirectly enhanced with Clostridium tyrobutyricum (Glu-CT) and CaCO3 (Glu-CaCO3), respectively. The effect of butyric acid fermentation and lactic acid fermentation during ensiling on the subsequent biogas production was investigated. Butyric acid fermentation was successfully enhanced in the Glu-CaCO3 treatment but not in the Glu-CT treatment. Analysis of storage performance and microbial activity revealed that enhanced butyric acid fermentation triggered synergetic acid hydrolysis and enzymolysis during ensiling and increased the biodegradability of the WMS. The specific methane yield (methane yield(measured)) and methane yield(orig) (corrected with storage loss) of the 60 d of ensiled WMS in the Glu-CaCO3 treatment increased by 20.1% and 10.4%, respectively, compared to the values on day 0, which were significantly higher than that of WMS subjected to lactic acid treatment (P < 0.05). The trade-off between OM loss and increased methane yield was positive when the butyric acid fermentation was enhanced during ensiling. Hence, the criteria for conventional ensiling of WMS for biogas production could be reconsidered.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available