Chen Naiwen, Xie Yimin, Liang Zhiwei, Shim Hojae
Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, China.
Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Taipa, Macau SAR, China.
J Environ Manage. 2023 Dec 15;348:119368. doi: 10.1016/j.jenvman.2023.119368. Epub 2023 Oct 21.
Producing biodiesel from food waste (FW) would benefit both environment and economy. Current study investigated biodiesel production from food waste and domestic wastewater by utilizing the oleaginous yeast Rhodosporidium toruloides under non-sterile condition. The potential of biolipid production from the mixture of effluents of existing local FW treatment facilities and domestic wastewater was firstly evaluated. Then, to increase the nutrient recovery efficiency, FW hydrolysis process by crude enzymes produced from solid FWs by Aspergillus oryzae was introduced and the conditions were further optimized. The optimized hydrolysis process resulted in reducing sugar (RS) yield of 251.81 ± 8.09 mg g and free amino nitrogen (FAN) yield of 7.70 ± 0.74 mg g while waste oil with the RS yield of 93.54 ± 0.01 mg g was easily separated without solvent usage. Compared to the hydrolysate only used, when mixed with domestic wastewater, the results showed obvious enhancement on biomass yield, biolipid yield, and wastewater treatment efficiency. The maximum biolipid yield was 29.80 ± 0.50 mg g and the estimated quality of biodiesel produced from the biolipid met both EN 14214 and ASTM D6751 standards.
利用食品废弃物（FW）生产生物柴油对环境和经济都有益。当前的研究调查了在非无菌条件下利用产油酵母红冬孢酵母从食品废弃物和生活污水中生产生物柴油的情况。首先评估了现有当地食品废弃物处理设施的废水与生活污水混合后的产油潜力。然后，为提高养分回收效率，引入了米曲霉从固体食品废弃物中产生的粗酶进行食品废弃物水解过程，并进一步优化了条件。优化后的水解过程使还原糖（RS）产量达到251.81±8.09mg/g，游离氨基氮（FAN）产量达到7.70±0.74mg/g，同时无需使用溶剂即可轻松分离出还原糖产量为93.54±0.01mg/g的废油。与仅使用水解产物相比，当与生活污水混合时，结果显示生物量产量、生物脂质产量和废水处理效率均有明显提高。最大生物脂质产量为29.80±0.50mg/g，由该生物脂质生产的生物柴油估计质量符合EN 14214和ASTM D6751标准。
Zotero 插件