期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 270, 期 -, 页码 -出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2020.110904
关键词
Laccase; Solid-state fermentation; Tea residues; Trametes versicolor; Dye decolorization
资金
- National Natural Science Foundation of China [31571822]
- Natural Science Foundation of Jiangsu Province [BK20160493]
- Social Development Project of Jiangsu Province [BE2017683]
- China Postdoctoral Science Foundation [2015M571691]
- Senior Talent Scientific Research Initial Funding Project of Jiangsu University [15JDG17, 15JDG061]
- International Postdoctoral Exchange Fellowship Program of China
- Excellent Key Young Teachers Project of Jiangsu University
An efficient valorization of tea residues into value-added product was developed by Trametes versicolor in solid-state fermentation (SSF). The laccase production of 25.7 U/g dry substrate was obtained by optimizing culture medium and condition, resulting in a 4.0-fold increase compared to that of 6.4 U/g dry substrate under unoptimized condition. During the 7-day cultivation under SSF, 44.7%, 12.2% and 9.8% degradation occurred for lignin, hemicellulose and cellulose in tea residues, respectively. Laccase production reached 31.2 U/g dry substrate by the scaling-up culture in shallow tray system. The dry fermented tea residues were directly used as crude enzyme in the decolorization of malachite green. It possessed a decolorization rate of more than 95% within 120 min and remained 81.3% of decolorization capacity after 6 cycles. The present study provided a useful strategy for low-cost laccase production by SSF and it exhibited great potential for the application in dye decolorization.
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