Comparison of the food waste degradation rate and microbial community in the matrix between two biodegradation agents in a food waste disposer.

Tianyu Li, Li Liu, Xinghua Wei, Hongying Zhang, Ping Fang

Journal: Waste management (New York, N.Y.) 2015;34(12):2641-6

PMID: 25277824

Full Text on Elsevier Science View on PubMed

Abstract

To reduce the proportion of food waste in municipal solid waste, a food waste biodegradation experiment with two biodegradation agents was conducted for seven weeks with 500 g of food waste added every day into each disposer. The agent containing four biodegradation bacterial strains showed higher degradation rates and matrix temperatures than that containing two. Furthermore, significant differences in the microbiological community structures of the matrixes were found not only between the two biodegradation systems but also among different stages in the same degradation system based on DGGE profiles. The F2 strain exhibited the highest DGGE optical density (OD) value among biodegradation systems and at all experimental stages, suggesting it was a dominant strain during food waste degradation.

Address: Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.; Zhejiang Provincial Key Laboratory of Subtropical Soil Science and Plant Nutrition, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.; Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].

DOI: 10.1016/j.wasman.2014.08.020

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MeSH Terms: Biodegradation, Environmental, Denaturing Gradient Gel Electrophoresis, Microbiota, Polymerase Chain Reaction, Refuse Disposal, Solid Waste