Spent coffee grounds (SCG) or coffee residue wastes (CRW) provide excellent raw material for mannose and bioethanol production. In this study, SCG were used to produce valuable biosugars, including oligosaccharides (OSs), manno-oligosaccharides (MOSs), mannose, and bioethanol. SCG were subjected to delignification and defatting, producing SCG-derived polysaccharides. Two-stage enzymatic hydrolysis (short- and long-term) was performed to produce short-chain manno-oligosaccharides (MOSs) and monosaccharides (MSs), respectively. From 100 g dry weight (DW) amounts of SCG, approximately 77 g delignified SCG and 61 g SCG-derived polysaccharides, amounts of 15.9 g of first biosugars (mostly MOSs), 25.6 g of second biosugars (mostly MSs), and 3.1 g of bioethanol, were recovered. This technique may aid in the production of high-value mannose and OSs from SCG and other lignocellulosic biomasses that contain specific polysaccharides.

用过的咖啡渣（SCG）或咖啡渣渣（CRW）为生产甘露糖和生物乙醇提供了极好的原料。在这项研究中，SCG用于生产有价值的生物糖，包括寡糖（OSs），甘露寡糖（MOSs），甘露糖和生物乙醇。对SCG进行去木质素和脱脂处理，生成SCG衍生的多糖。进行了两阶段的酶促水解（短期和长期），分别产生了短链甘露寡糖（MOSs）和单糖（MSs）。从100克干重（DW）量的SCG，约77克去木质素的SCG和61克SCG衍生的多糖，15.9克第一生物糖（主要是MOS），25.6克第二生物糖（主要是MS）和3.1克回收了生物乙醇。