To promote the use of waste-originated resources in biodiesel production, this study proposes the utilization of leather tanning waste (LTW) and crab-shell (CS) waste as the respective lipid source and catalyst material. The obtained CS-based calcium oxide (CaO) has comparable textural properties with those of existing waste-based catalysts and shows high catalytic activity for the conversion of LTW to biodiesel. The optimum yield of fatty acid ethyl esters (FAEE) is predicted at 97.9 wt%, while it is experimentally observed at 98.7 ± 0.4 wt% (purity of 98.6 ± 0.4 wt%) using the following operating condition: reaction time t = 3.58 h, catalyst amount m_c = 3.87 wt%, and a molar ratio of ethanol to LTW m_eo = 12:1. The CS-based CaO shows good reusability with FAEE yield staying above 90 wt% for four cycles. The fuel properties of LTW-based biodiesel meet ASTM D6751 and ASTM D975-08 standards, with the ethyl ester ranging from C14 to C20.

为了促进废物来源资源在生物柴油生产中的利用，本研究建议利用皮革鞣制废物 (LTW) 和蟹壳 (CS) 废物作为各自的脂质来源和催化剂材料。所获得的 CS 基氧化钙 (CaO) 具有与现有废物基催化剂相当的结构特性，并且在将 LTW 转化为生物柴油方面表现出很高的催化活性。脂肪酸乙酯 (FAEE) 的最佳产率预计为 97.9 wt%，而使用以下操作条件实验观察到的产率为 98.7 ± 0.4 wt%（纯度为 98.6 ± 0.4 wt%）：反应时间t  = 3.58 h , 催化剂量m _c  = 3.87 wt%, 乙醇与 LTW m _eo的摩尔比 = 12:1。基于 CS 的 CaO 显示出良好的可重用性，四个循环的 FAEE 产率保持在 90 wt% 以上。LTW基生物柴油的燃料特性符合ASTM D6751和ASTM D975-08标准，乙酯范围为C14至C20。