Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China.
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Bioresour Technol. 2024 Dec;414:131635. doi: 10.1016/j.biortech.2024.131635. Epub 2024 Oct 12.
China generates over 100 million tons of food waste annually, leading to significant environmental pollution and health risks if not managed properly. Converting FW into a high-value-added platform molecule, lactic acid (LA), through fermentation offers a promising approach for both waste treatment and resource recovery. This paper presents a comprehensive review of recent advancements in LA production from FW, focusing on pure strains fermentation and open fermentation technologies, metabolic mechanisms, and problems in fermentation. It also assesses purification methods, including molecular distillation, adsorption, membrane separation, precipitation, esterification and hydrolysis, solvent extraction, and in-situ separation, analyzing their efficiency, advantages, and disadvantages. However, current research encounters several challenges, including low LA yield, low optical purity of L-(+)-LA, and difficulties in the separation and purification of LA. The integration of in-situ separation technology coupled with multiple separation methods is highlighted as a promising direction for future advancements.
中国每年产生超过 1 亿吨的食物垃圾，如果处理不当，会造成严重的环境污染和健康风险。通过发酵将 FW 转化为高附加值的平台分子——乳酸（LA），为废物处理和资源回收提供了一种很有前途的方法。本文对 FW 生产 LA 的最新进展进行了全面综述，重点介绍了纯菌株发酵和开放发酵技术、代谢机制以及发酵中存在的问题。还评估了纯化方法，包括分子蒸馏、吸附、膜分离、沉淀、酯化和水解、溶剂萃取和原位分离，分析了它们的效率、优点和缺点。然而，当前的研究面临着一些挑战，包括 LA 产量低、L-（+）-LA 的光学纯度低以及 LA 分离和纯化的困难。原位分离技术与多种分离方法相结合被认为是未来发展的一个有前途的方向。
