储存时间和微需氧条件对食物垃圾产乳酸的影响。
Impact of storage duration and micro-aerobic conditions on lactic acid production from food waste.
机构信息
Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.
出版信息
Bioresour Technol. 2021 Mar;323:124618. doi: 10.1016/j.biortech.2020.124618. Epub 2020 Dec 28.
Food waste (FW) is an abundant resource with great potential for lactic acid (LA) production. In the present study, the effect of storage time on FW characteristics and its potential for LA production was investigated. The largest part of sugars was consumed during 7 to 15 days of FW storage and the sugar consumption reached 68.0% after 15 days. To enhance the LA production, micro-aerobic conditions (13 mL air/g VS) and addition of β-glucosidase were applied to improve polysaccharides hydrolysis, resulting to increase of monosaccharides content to 76.6%. Regarding fermentative LA production, the highest LA titer and yield of hydrolyzed FW was 32.1 ± 0.5 g/L and 0.76 ± 0.01 g/g, respectively. Furthermore, L-LA isomer was higher than 70% when FW was stored for up to 7 days. However, attention should be paid on controlling the FW storage to approximately one week.
食物垃圾（FW）是一种丰富的资源，具有很大的生产乳酸（LA）潜力。在本研究中，研究了储存时间对 FW 特性及其生产 LA 的潜力的影响。FW 储存 7 至 15 天期间消耗了大部分的糖，15 天后糖的消耗达到了 68.0%。为了提高 LA 的产量，采用微需氧条件（13 mL 空气/gVS）并添加β-葡萄糖苷酶来促进多糖水解，从而将单糖含量提高到 76.6%。关于发酵生产 LA，水解 FW 的最高 LA 浓度和产率分别为 32.1±0.5 g/L 和 0.76±0.01 g/g。此外，当 FW 储存不超过 7 天时，L-LA 异构体含量高于 70%。然而，应注意控制 FW 的储存时间约为一周。
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