期刊
APPLIED ENERGY
卷 140, 期 -, 页码 65-74出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2014.11.070
关键词
Citrus peel waste; Bio ethanol; Enzymatic hydrolysis; D-Limonene extract; Continuous immobilized yeast fermentation
资金
- Priority Research Centers Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2010-0020141]
- Forest Science & Technology Projects, Forest Service, Republic of Korea [S211314L010120]
- Korea Forest Service [S211314L010120] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Large quantities of fruit waste are generated from agricultural processes worldwide. This waste is often simply dumped into landfills or the ocean. Fruit waste has high levels of sugars, including sucrose, glucose, and fructose, that can be fermented for bioethanol production. However, some fruit wastes, such as citrus peel waste (CPW), contain compounds that can inhibit fermentation and should be removed for efficient bioethanol production. We developed a novel approach for converting single-source CPW (i.e., orange, mandarin, grapefruit, lemon, or lime) or CPW in combination with other fruit waste (i.e., banana peel, apple pomace, and pear waste) to produce bioethanol. Two in-house enzymes were produced from Avicel and CPW and were tested with fruit waste at 12-15% (w/v) solid loading. The rates of enzymatic conversion of fruit waste to fermentable sugars were approximately 90% for all feedstocks after 48 h. We also designed a D-limonene removal column (LRC) that successfully removed this inhibitor from the fruit waste. When the LRC was coupled with an immobilized cell reactor (ICR), yeast fermentation resulted in ethanol concentrations (14.4-29.5 g/L) and yields (90.2-93.1%) that were 12-fold greater than products from ICR fermentation alone. (C) 2014 Elsevier Ltd. All rights reserved.
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