Affiliation:
1. Beijing Technology and Business University
Abstract
The variations of daily biogas yields, cumulative biogas yields, biogas composition analysis, total solids (TS) and volatile solids (VS) were studied in the process of mesophilic and dry anaerobic digestion of food waste under different oil contents (0%, 2%, 4%, 6%, 8%, 10%) at 35 °C. The gas production raised and then went down with the oil content, followed by 243.14, 245.64, 256.09, 269.25, 276.54, 284.22mL /g TS respectively. The research provided a reference for the pretreatment of food waste in follow-up continuous fermentation. Results showed that the period of the process of mesophilic dry anaerobic digestion under oil content of 0% was the shortest, with the total biogas production of 1275.5mL. During the process of the digestion, methane content of the biogas raised and then went down, up to a maximum of 77.62%. The removal rate of TS and VS in food waste with the oil content of 6% was the highest, obtained as 11.2% and 13.2%, respectively.
Publisher
Trans Tech Publications, Ltd.
Reference22 articles.
1. C.M. Zeng, X Li, P.Q. Chen, Y.M. Deng, Discussion and research on management and disposal of food waste, Environ. Sci. Manage. 35(2010)31-35. (in Chinese).
2. Y.Y. Yuan, X.Y. Cao, D.J. Niu, Y.C. Zhao, Discussion on characteristics and treatment technologies of food residue, Environ. Sanit. Eng. 14(2006)46-49. (in Chinese).
3. W.C. Kuo, K.Y. Cheng, Use of respirometer in evaluation of process and toxicity of thermophilic anaerobic digestion for treating kitchen waste, Bioresour. Technol. 98(2007)1805-1811.
4. A.S. Maza, S. Heaven, C.J. Banks, Ammonia removal in food waste anaerobic digestion using a side-steam stripping process, Bioresour. Technol. 152 (2014)307-315.
5. C. Cavinato, A. Giuliano, D. Bolzonella, P. Pavan, F. Cecchi, Bio-hythane production from food waste by dark fermentation coupled with anaerobic digestion process: A long-term pilot scale experience, Int. J. Hydrogen Energy. 37(2012)11549-11555.