From organic waste to biodiesel: Black soldier fly, Hermetia illucens, makes it feasible
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...Black soldier flies are also known to reduce the mass and nutrient content of swine manure [56] at efficiencies similar to poultry manure [85,86], with benefits for improved farm hygiene, reduced pest fly populations, and reduced nutrient pollution in runoff [87]....
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...Some advocate extraction of fat from the larvae (Diener et al., 2011b; Fasakin et al., 2003) to create a high-protein meal and suggest alternative use of the larval fat, e. g. for production of biodiesel (Li et al., 2011a)....
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...(Li et al., 2011b, 2012; Zheng et al., 2012)....
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...During the procedure, the fat is extracted from larvae by petroleum ether and modified by acid-catalyzed esterification of free fatty acids (to decrease the acidity of crude fat) and alkaline-catalyzed transesterification (Li et al., 2011a)....
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...Fat content accounted for about 30% of the BSF larval biomass fed on manures, but chicken manure supported maximal larval growth and crude fat content (Li et al., 2011b) (Table 1)....
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...Thus, BSF larvae can convert dairy manure into biodiesel (Li et al., 2011c), and compared with oil crops, BSF has higher reproductive capacity and a shorter lifecycle....
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...BSF production requires less land than growing oil crops and may thereby alleviate conflicts between human food use and industrial use of crops (Li et al., 2011b,c)....
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...…1977 Chicken manure 40.1±2.5 3 27.9±8.3 3 Arango Gutiérrez et al., 2004; Li et al., 2011b; Sheppard et al., 1994 Swine manure 43.6; 43.2 2 26.4±7.6 4 Li et al., 2011b; Manzano-Agugliaro et al., 2012; Newton et al., 2005b; St-Hilaire et al., 2007b; Palm kernel meal 42.1; 45.8 2 27.5 1 Rachmawati…...
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...…have been found to contain 58- 72% saturated fatty acids and 19-40% mono- and polyunsaturated fatty acids of total fat content (Kroeckel et al., 2012; Li et al., 2011c; Makkar et al., 2014; Surendra et al., 2016), containing high levels of lauric, palmitic and oleic acid (Surendra et al., 2016)....
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References
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"From organic waste to biodiesel: Bl..." refers background in this paper
...Production cost is the main obstacle preventing biodiesel from being used as a primary fuel [9,10]....
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"From organic waste to biodiesel: Bl..." refers background in this paper
...Cost analysis shows that 75% of biodiesel cost is derived from the feedstock, primarily crop-oil such as soybean oil, rapeseed oil and sunflower oil [11]....
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