Double the biodiesel yield: rearing black soldier fly larvae, Hermetia illucens, on solid residual fraction of restaurant waste after grease extraction for biodiesel production.
Double the biodiesel yield: rearing black soldier fly larvae, Hermetia illucens, on solid residual fraction of restaurant waste after grease extraction for biodiesel production.
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DOI：
10.1016/j.renene.2011.10.004
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发表时间：
2012-05
期刊：
影响因子：
8.7
通讯作者：
L. Zheng;Qing Li;Jibin Zhang;Ziniu Yu
中科院分区：
文献类型：
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作者：
L. Zheng;Qing Li;Jibin Zhang;Ziniu Yu
生物柴油是一种很有前途的柴油替代燃料，在包括中国在内的许多国家引起了全世界公众的兴趣。但以食用油为原料生产生物柴油的高成本限制了其经济可行性。另一种方法是利用从餐馆废物中提取的油脂生产生物柴油，这是一种潜在的低成本方法。然而，这种方法产生了大量的固体残余部分，需要适当的处理。本研究进行了评估的潜力，二次生物柴油生产的固体残留部分的餐厅废物后，典型的油脂提取（SRF）采用高脂肪含量的昆虫，黑色的士兵飞，Hermetia illucens。对SRF进行取样并饲喂黑水虻幼虫。将所得幼虫生物质用于通过石油醚提取粗油脂。提取的粗油脂，然后转化为生物柴油的酸催化（1%H2SO4）酯化和碱催化（0.8%NaOH）酯交换。由在1 kg SRF上生长的约1000只幼虫生产约23.6 g幼虫油脂基生物柴油。经7天饲养后，SRF的体重下降了61.8%。从餐厅废物中产生的生物柴油量几乎翻了一番（原始餐厅废物油脂，2.7%;幼虫油脂，2.4%）。以SRF为饲料的黑水虻幼虫生物柴油的主要甲酯成分为油酸甲酯（27.1%）、月桂酸甲酯（23.4%）和棕榈酸甲酯（18.2%）。该生物柴油的大部分性能符合标准EN 14214的规格，包括密度（860 kg/m3）、粘度（4.9 mm 2/s）、闪点（128 ℃）、十六烷值（58）和酯含量（96.9%）。这些结果表明，从SRF饲养的幼虫中获得的黑水虻幼虫生物量可能用作生物柴油生产的非食品原料。该方法不仅提高了从餐饮垃圾生产生物柴油的效率，还有助于更好地管理和显著减少在利用餐饮垃圾生产生物柴油的过程中产生的大量固体残余部分。
Biodiesel is a promising alternative diesel fuel which has increased worldwide public interest in a number of countries including China. But the high cost of producing biodiesel from feedstock, predominately food grade oils, limited its economic feasibility. An alternative of using grease extracted from restaurant waste to produce biodiesel is a potential low cost approach. However, this approach generates a significant large quantity of solid residual fraction which required proper disposal. This study was conducted to evaluate the potential of a secondary biodiesel production from the solid residual fraction of restaurant waste after typical grease extraction (SRF) employing a high fat containing insect, black soldier fly, Hermetia illucens. The SRF was sampled and fed to black soldier fly larvae. The resulting larval biomass was used for crude grease extraction by petroleum ether. The extracted crude grease was then converted into biodiesel by acidcatalyzed (1% H2SO4) esterification and alkaline-catalyzed (0.8% NaOH) transesterification. About 23.6 g larval grease-based biodiesel was produced from approximately 1000 larvae grown on 1 kg of SRF. The weight of SRF was reduced by about 61.8% after being fed by the black soldier fly larvae for 7 days. The amount of biodiesel yield from restaurant waste was nearly doubled (original restaurant waste grease, 2.7%; larval grease, 2.4%). The major methyl ester components of the biodiesel derived from black soldier fly larvae fed on SRF were oleinic acid methyl ester (27.1%), lauric acid methyl ester (23.4%), and palmitic acid methyl ester (18.2%). Most of the properties of this biodiesel met the specifications of the standard EN 14214, including density (860 kg/m3), viscosity (4.9 mm2/s), flash point (128 C), cetane number (58) and ester contents (96.9%). These results indicated that black soldier fly larval biomass obtained from larvae reared on SRF could potentially be used as a non-food feedstock for biodiesel production. This approach not only enhances the efficiency of biodiesel production from restaurant waste, it also helps to better manage and significantly reduce the large quantity of solid residual fraction produced during the process of biodiesel production using restaurant waste.