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首页> 外文期刊>Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies >Bioconversion of volatile fatty acids derived from waste activated sludge into lipids by Cryptococcus curvatus
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Bioconversion of volatile fatty acids derived from waste activated sludge into lipids by Cryptococcus curvatus

机译：弯曲隐球菌将废活性污泥中的挥发性脂肪酸生物转化为脂质

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摘要

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.
机译：本研究利用废活性污泥（WAS）衍生的纯挥发性脂肪酸（VFA）溶液生产微生物脂质作为培养基，旨在实现WAS的资源回收，同时为生物柴油生产提供低成本原料。从三个产油酵母中选择曲霉隐球菌，以产生具有源自WAS的VFA的脂质。在分批培养中，通过鸟粪石沉淀除去氨氮后，碳氮比从约3.5增加到165时，脂质含量从10.2％增加到16.8％。使用顺序分批培养（SBC）策略培养5个循环后，脂质含量进一步增加到39.6％，生物量从1.56 g / L增加到4.53 g / L。从WAS衍生的VFA溶液中产生的脂质包含将近50％的单不饱和脂肪酸，包括棕榈酸，十七烷酸，银杏酸，硬脂酸，油酸和亚油酸，这表明生物柴油的生产是足够的。 （C）2016 Elsevier Ltd.保留所有权利。

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