Conversion of sewage sludge into lipids by Lipomyces starkeyi for biodiesel production

Getting Lipids for Biodiesel Production from Oleaginous Fungi

“…This strain is able to use cellulose as substrate and accumulate lipids in a low cost fermentation system on this abundant cellulosic by-product. Other complex matrices have been used, such as solids from wheat bran fermentation (Jacob 1991), sewage sludge (Angerbauer et al, 2008), wastewaters of animal fat treatment , whey derivatives (Ykema et al, 1989;Vamvakaki et al, 2010), olive oil mill wastewaters (Yousuf et al, 2010), and tomato waste hydrolysate (Fakas et al, 2008). Nowadays, lipid production with oleaginous yeasts is focused on selection and development of yeasts as converters of glycerol into lipid for biodiesel production, since it is the major side-product of the biodiesel production process.…”

“…Lipomyces are true soil inhabitants and have a worldwide distribution. The oleaginous species Lipomyces starkeyi has the capability to accumulate over 70% of its cell biomass as lipid under defined culture conditions, and can produce lipid on xylose, ethanol, and L-arabinose, or using a mixture of glucose and xylose (Zhao et al, 2008), as well as other wastes (Angerbauer et al, 2008). Cryptococcus curvatus is a yeast with industrial potential as single-cell oil because it can grow and accumulate lipid on a very broad range of substrates.…”

Co-fermentation of cellobiose and xylose by Lipomyces starkeyi for lipid production

“…A number of oleaginous strains have been applied for lipid production (Papanikolaou and Aggelis, 2011). The oleaginous yeast, Lipomyces starkeyi, can utilize a variety of carbon sources and produces a high amount of intracellular lipids (Zhao et al, 2008;Angerbauer et al, 2008;Wild et al, 2010;Lin et al, 2011). Although L. starkeyi can use a mixture of glucose and xylose for lipid production, it consumes these two sugars sequentially due to glucose repression (Zhao et al, 2008).…”

“…Although L. starkeyi can use a mixture of glucose and xylose for lipid production, it consumes these two sugars sequentially due to glucose repression (Zhao et al, 2008). For commercial production of microbial lipids, low-cost raw materials should be explored, such as glycerol, sewage sludge, molasses and hydrolysates of lignocellulosic biomass (Meesters et al, 1996;Angerbauer et al, 2008;Zhu et al, 2008;Huang et al, 2009). …”

Microbial Biodiesel Production - Oil Feedstocks Produced from Microbial Cell Cultivations

“…Many oleaginous yeasts were studied for lipid accumulation on different substrates, such as industrial glycerol Papanikolaou and Aggelis 2002), sewage sludge (Angerbauer, Siebenhofer et al 2008), whey permeate (Ykema, Verbree et al 1988;Akhtar, Gray et al 1998), sugar cane molasses (Alvarez, Rodriguez et al 1992), and rice straw hydrolysate (Huang, Zong et al 2009). The use of non-starch biomass is critical so that lignocelluloses can be used for organic carbon supply without concern of using food crops for fuel sources.…”