Bioconversion of volatile fatty acids derived from waste activated sludge into lipids by Cryptococcus curvatus
Bioconversion of volatile fatty acids derived from waste activated sludge into lipids by Cryptococcus curvatus
复制标题
弯曲隐球藻将废弃活性污泥中的挥发性脂肪酸生物转化为脂质
DOI：
10.1016/j.biortech.2016.03.146
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发表时间：
2016-07-01
影响因子：
11.4
通讯作者：
Huang, Xiang-Feng
中科院分区：
文献类型：
--
作者：
Liu, Jia;Liu, Jia-Nan;Huang, Xiang-Feng
Pure volatile fatty acid (VFA) solution derived from waste activated sludge (WAS) was used to produce microbial lipids as culture medium in this study, which aimed to realize the resource recovery of WAS and provide low-cost feedstock for biodiesel production simultaneously. Cryptococcus curvatus was selected among three oleaginous yeast to produce lipids with VFAs derived from WAS. In batch cultivation, lipid contents increased from 10.2% to 16.8% when carbon to nitrogen ratio increased from about 3.5 to 165 after removal of ammonia nitrogen by struvite precipitation. The lipid content further increased to 39.6% and the biomass increased from 1.56 g/L to 4.53 g/L after cultivation for five cycles using sequencing batch culture (SBC) strategy. The lipids produced from WAS-derived VFA solution contained nearly 50% of monounsaturated fatty acids, including palmitic acid, heptadecanoic acid, ginkgolic acid, stearic acid, oleic acid, and linoleic acid, which showed the adequacy of biodiesel production. (C) 2016 Elsevier Ltd. All rights reserved.
