Skip to main content
Dryad logo

Data from: Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system

Citation

Gao, Ming et al. (2020), Data from: Effect of yeast addition on the biogas production performance of a food waste anaerobic digestion system, Dryad, Dataset, https://doi.org/10.5061/dryad.9s4mw6md0

Abstract

Food waste contains numerous easily degradable components, and anaerobic digestion is prone to acidification and instability. This work aimed to investigate the effect of adding yeast on biogas production performance, when substrate is added after biogas production is reduced. The results showed that the daily biogas production increased 520 ml and 550 ml by adding 2.0% (VS) of activated yeast on the 12th and 37th day of anaerobic digestion, respectively, and the gas production was relatively stable. In the control group without yeast, the increase of gas production was significantly reduced. After the second addition of substrate and yeast, biogas production only increased 60 ml compared with that before the addition. After fermentation, the biogas production of yeast group also increased by 33.2% compared with the control group. Results of the analysis of indicators, such as volatile organic acids, alkalinity, and propionic acid, showed that the stability of the anaerobic digestion system of the yeast group was higher. Thus, the yeast group is highly likely to recover normal gas production when the biogas production is reduced, and substrate is added. The results provide a reference for experiments on the industrialisation of continuous anaerobic digestion to take tolerable measures when the organic load of the feed fluctuates dramatically.

Funding

Beijing Municipal Natural Science Foundation, Award: 8192028

National Key Research and Development Program of China, Award: 2018YFC1900903, 2018YFC1900904

Foundation of the Committee on Science and Technology of Tianjin, Award: 18YFHBZC00020

Foundation of the Committee on Science and Technology of Tianjin, Award: 18YFHBZC00020