Russo Gianfrancesco, Gelosia Mattia, Fabbrizi Giacomo, Angrisano Mariarosaria, Policastro Grazia, Cavalaglio Gianluca
CIRIAF, Interuniversity Research Centre on Pollution and Environment "M.Felli", University of Perugia, Via G. Duranti 67, 06125 Perugia, Italy.
Department of Engineering, Pegaso Telematic University, 80143 Naples, Italy.
Polymers (Basel). 2024 Dec 21;16(24):3577. doi: 10.3390/polym16243577.
Lactic acid (LA) is a versatile, optically active compound with applications across the food, cosmetics, pharmaceutical, and chemical industries, largely driven by its role in producing biodegradable polylactic acid (PLA). Due to its abundance, lignocellulosic biomass is a promising and sustainable resource for LA production, although media derived from these matrices are often rich in xylose and contain growth inhibitors. This study investigates LA production using a xylose-rich medium derived from DC stalks treated through steam explosion and enzymatic hydrolysis. The lactic acid bacteria strains , , and were grown on natural media, achieving yields of 0.59, 0.57, and 0.58 g LA/g total carbon consumed, respectively. Remarkably, on xylose-rich media, all supplied sugar was consumed, with LA yields comparable to those on complex media. These findings highlight the adaptability of these strains in the presence of inhibitors and support the potential of lignocellulosic biomass as a low-cost and sustainable substrate for effective PLA production.
乳酸（LA）是一种用途广泛的旋光性化合物，在食品、化妆品、制药和化工等行业都有应用，这在很大程度上得益于其在生产可生物降解聚乳酸（PLA）中的作用。由于木质纤维素生物质资源丰富，它是生产乳酸的一种很有前景的可持续资源，尽管从这些基质中获得的培养基通常富含木糖并含有生长抑制剂。本研究调查了使用通过蒸汽爆破和酶水解处理的玉米秸秆衍生的富含木糖的培养基生产乳酸的情况。乳酸菌菌株、和在天然培养基上生长，分别实现了每克消耗的总碳产生0.59、0.57和0.58克乳酸的产量。值得注意的是，在富含木糖的培养基上，所有供应的糖都被消耗掉了，乳酸产量与在复杂培养基上的产量相当。这些发现突出了这些菌株在存在抑制剂的情况下的适应性，并支持了木质纤维素生物质作为有效生产聚乳酸的低成本和可持续底物的潜力。
