期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 11, 页码 6487-6493出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.03.036
关键词
Waste molasses; Microalga Chlorella protothecoides; Oil; Biodiesel
资金
- NSF [30970224]
- MOST [2009AA064401, 2010AA101601, 2011BAD14B05]
The by-product of sugar refinery waste molasses was explored as alternative to glucose-based medium of Chlorella protothecoides in this study. Enzymatic hydrolysis is required for waste molasses suitable for algal growth. Waste molasses hydrolysate was confirmed as a sole source of full nutrients to totally replace glucose-based medium in support of rapid growth and high oil yield from algae. Under optimized conditions, the maximum algal cell density, oil content, and oil yield were respectively 70.9 g/L, 57.6%, and 40.8 g/L. The scalability of the waste molasses-fed algal system was confirmed from 0.5 L flasks to 5 L fermenters. The quality of biodiesel from waste molasses-fed algae was probably comparable to that from glucose-fed ones. Economic analysis indicated the cost of oil production from waste molasses-fed algae reduced by 50%. Significant cost reduction of algal biodiesel production through fermentation engineering based on the approach is expected. (C) 2011 Elsevier Ltd. All rights reserved.
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