Biodegradability and methane fermentability of polylactic acid by thermophilic methane fermentation

被引：23

作者：

Tseng H.-C. ^{[1
]}

Fujimoto N. ^{[1
]}

Ohnishi A. ^{[1
]}

机构：

[1] Department of Fermentation Science, Faculty of Applied Bio-Science, Tokyo University of Agriculture, 1-1 Sakuragaoka 1-chome, Setagaya-ku, Tokyo

来源：

Bioresource Technology Reports | 2019年 / 8卷

关键词：

Anaerobic microflora; Biodegradable plastic; PCR-denaturing gradient gel electrophoresis; Polylactic acid; Thermophilic methane fermentation;

D O I：

10.1016/j.biteb.2019.100327

中图分类号：

学科分类号：

摘要：

Polylactic acid (PLA) is considered to be a promising polymer to replace petroleum-based plastics. The aim of this study was to evaluate the biological decomposability of PLA by thermophilic methane fermentation (TMF) and to analyse the microorganisms involved in PLA decomposition. Small- and large-scale batch tests were carried out using disposable cutlery as PLA products and pure poly L-lactic acid (PLLA) pellets. It was found that 70–77% of PLA was decomposed by TMF, based on weight changes. The yield of CH4 was 321–343 mL CH4/g PLA consumed. The addition of bacteria doubled the physicochemical degradation rate of PLA. It was determined that PLA decomposition by TMF was efficient, and that it was enhanced by microbial activity. In particular, lactic acid-consuming bacteria were found to play an important role in PLA decomposition by TMF. Thus, we can conclude that TMF is potentially suitable for PLA treatment and biofuel generation. © 2019 Elsevier Ltd

引用

共 31 条

[1]

Agarwal M., Koelling K.W., Chalmers J.J., Characterization of the degradation of polylactic acid polymer in a solid substrate environment, Biotechnol. Prog., 14, pp. 517-526, (1998)

[2]

Bergsma J.E., de Bruijn W.C., Rozema F.R., Bos R.R.M., Boering G., Late degradation tissue response to poly(l-lactide) bone plates and screws, Biomaterials, 16, pp. 25-31, (1995)

[3]

Blasing M., Amelung W., Plastics in soil: Analytical methods and possible sources, Sci. Total Environ., 612, pp. 422-435, (2018)

[4]

Braguglia C.M., Gallipoli A., Gianico A., Pagliaccia P., Anaerobic bioconversion of food waste into energy: a critical review, Bioresour. Technol., 248, pp. 37-56, (2018)

[5]

Chae Y., An Y., Current research trends on plastic pollution and ecological impacts on the soil ecosystem: a review, Environ. Pollut., 240, pp. 387-395, (2018)

[6]

Dridi B., Henry M., Richet H., Raoult D., Drancourt M., Age-related prevalence of Methanomassiliicoccus luminyensis in the human gut microbiome, Apmis, 120, pp. 773-777, (2012)

[7]

EPA, Advancing Sustainable Materials Management: 2015 Fact Sheet Assessing Trends in Material Generation, Recycling, Composting, Combustion With Energy Recovery and Landfilling in the United States, (2018)

[8]

FAO, Global Food Losses and Food Waste: Extent, Causes and Prevention, (2011)

[9]

Farah S., Anderson D.G., Langer R., Physical and mechanical properties of PLA, and their functions in widespread applications — a comprehensive review, Adv. Drug Deliv. Rev., 107, pp. 367-392, (2016)

[10]

Husarova L., Pekarova S., Stloukal P., Kucharzcyk P., Verney V., Commereuc S., Ramone A., Koutny M., Identification of important abiotic and biotic factors in the biodegradation of poly(l-lactic acid), Int. J. Biol. Macromol., 71, pp. 155-162, (2014)

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