State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271018, China.
Bioresour Technol. 2022 Oct;361:127703. doi: 10.1016/j.biortech.2022.127703. Epub 2022 Jul 27.
The management of potato peel waste (PPW) has been a challenge faced by the potato industry. This investigation assessed the feasibility of PPW for volatile fatty acids (VFAs) production via anaerobic fermentation, and investigated the impact of Fe nanoparticles (Fe NPs) supplementation on the VFAs production. It is found that PPW is a potential feedstock for producing VFAs, achieving a yield of 480.4 mg COD/g-vS Meanwhile, the supplementation of Fe NPs significantly promoted the VFAs productivity and quality. The higher enrichment of VFAs-producing bacteria, including Clostridium, Proteiniphilum, Fonticella and Pygmaiobacter, contributed to the promotion of the VFAs yield. Furthermore, metagenomic analysis revealed that the encoding genes responsible for carbohydrate metabolism (especially starch), membrane transport, glycolysis and the formation of acetic and butyric acids were remarkably up-regulated,which could be the essential reason for the enhanced metabolic activity and VFAs productivity. This work provides a promising strategy for recycling PPW.
马铃薯皮废弃物（PPW）的管理一直是马铃薯产业面临的挑战。本研究评估了通过厌氧发酵生产挥发性脂肪酸（VFAs）的 PPW 的可行性，并研究了添加铁纳米颗粒（Fe NPs）对 VFAs 生产的影响。结果表明，PPW 是生产 VFAs 的潜在原料，可实现 480.4 mg COD/g-vS 的产率。同时，Fe NPs 的添加显著促进了 VFAs 的生产能力和质量。富集了更多的产 VFAs 细菌，包括梭菌属、蛋白菌属、Fonticella 和 Pygmaiobacter，这有助于提高 VFAs 的产率。此外，宏基因组分析表明，负责碳水化合物代谢（尤其是淀粉）、膜转运、糖酵解和乙酸、丁酸形成的编码基因显著上调，这可能是增强代谢活性和 VFAs 生产能力的重要原因。这项工作为回收 PPW 提供了一种很有前途的策略。
