Journal
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
Volume 92, Issue -, Pages 86-100Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2014.04.013
Keywords
Biodegradation; Fungal consortium; Aspergillus; Penicillium; Sugarcane bagasse residues; Thermotolerant/thermoresistant fungi
Funding
- Center for Advanced Studies for Agriculture and Food, Institute for Advanced Studies, Kasetsart University under the Higher Education Research Promotion
- National Research University Project of Thailand, Office of the Higher Education Commission, Ministry of Education, Thailand
- Ri-BIOTEC from the National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand [P-11-0101]
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To promote the decomposition of sugarcane bagasse (SCB) for conversion into value-added products and to reduce waste, the capability of fungal mixes (FMs) to degrade SCB was examined. A total of 169 isolates from SCB and non-SCB were categorized as thermotolerant and thermoresistant. Thirty-six fungal candidates were screened for the presence of polyphenol oxidase, endoglucanase (EDN) and xylanase (XLN) activities, and EDN and XLN activities were quantitated. Five identified isolates (Aspergillus flavus AG10; Aspergillus niger AG68 82 NB23; and Penicillium citrinum AG93 & AG140) were selected as the best enzyme producers, and 15 moderately to highly xylolytic, cellulolytic and ligninolytic isolates were added to construct FMs. Using a Taguchi design, the top ten reducing sugar-producing FMs (no. 12 showed the maximum amount of reducing sugar, at 2.11 mg g(-1), followed by no. 7, 15, 2, 16, 11, 13, 6, 4, & 8) were selected as potential agents for decomposition durations of 1, 2 and 3 months. The maximum decrease in SCB materials compared with the control was generated by FM 6 (9.08% cellulose reduction); FM 13 (21.03% hemicellulose reduction); and FM 16(9.21% lignin reduction). These results indicate the potential use of SCB as a substrate for synergistic FMs. These FMs could be applied to the large-scale composting of SCB and other related agricultural residues, thus improving the biological pretreatment of lignocellulose. (C) 2014 Elsevier Ltd. All rights reserved.
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