Metagenomic insights into improving mechanisms of Fe0 nanoparticles on volatile fatty acids production from potato peel waste anaerobic fermentation

Guang Yang; Chonglin Xu; Sunita Varjani; Yaoyu Zhou; Jonathan Wc Wong; Guilan Duan

doi:10.1016/j.biortech.2022.127703

Metagenomic insights into improving mechanisms of Fe⁰ nanoparticles on volatile fatty acids production from potato peel waste anaerobic fermentation

Bioresour Technol. 2022 Oct:361:127703. doi: 10.1016/j.biortech.2022.127703. Epub 2022 Jul 27.

Authors

Guang Yang¹, Chonglin Xu², Sunita Varjani³, Yaoyu Zhou⁴, Jonathan Wc Wong⁵, Guilan Duan⁶

Affiliations

¹ State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
² College of Resources and Environment, Key Laboratory of Agricultural Environment, Shandong Agricultural University, Tai'an 271018, China.
³ Gujarat Pollution Control Board, Gandhinagar-382 010, Gujarat, India.
⁴ College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
⁵ Sino-Forest Applied Research Centre for Pearl River Delta Environment, Department of Biology, Hong Kong Baptist University, China.
⁶ State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: duangl@rcees.ac.cn.

PMID: 35907599
DOI: 10.1016/j.biortech.2022.127703

Abstract

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 Fe⁰ nanoparticles (Fe⁰ 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 Fe⁰ 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.

Keywords: Anaerobic fermentation; Metagenomic analysis; Microbial community structure; Potato peel waste; Volatile fatty acids.

MeSH terms

Anaerobiosis
Bioreactors
Fatty Acids, Volatile / metabolism
Fermentation
Hydrogen-Ion Concentration
Nanoparticles*
Sewage / microbiology
Solanum tuberosum*

Substances

Fatty Acids, Volatile
Sewage