Exploring the bacterial community succession and metabolic profiles of Lonicera japonica Thunb. residues during anaerobic fermentation

• Published in: Bioresource technology Vol. 367; p. 128264
• Main Authors: Huang, Fuqing, Wang, Tianwei, Zhang, Jiaqi, Tahir, Muhammad, Sun, Jiahao, Liu, Yayong, Yun, Fangfei, Xia, Tianqi, Teng, Kunling, Wang, Jiwen, Zhong, Jin
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-01-2023
• Subjects: Anaerobic fermentation; Bacterial community succession; Compound additive; Lonicera japonica Thunb. residues; Metabolic profiles; Metabolic profiles; Anaerobic fermentation; Bacterial community succession; Compound additive; Lonicera japonica Thunb. residues
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2022.128264

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•First reported the metabolomics of LJT residues during anaerobic fermentation.•Anaerobic fermentation is a practical approach to utilize the LJT residues.•Anaerobic fermentation couldn’t cause a functional deficiency of metabolites.•Compound additives improved fermentation quality and reduced undesirable bacteria.
Discarding Lonicera japonica Thunb. (LJT) residues containing many active metabolites create tremendous waste. This study aimed to effectively use LJT residues by anaerobic fermentation. Fermentation significantly decreased the pH values and reduced the abundance of undesirable bacteria (potential pathogenic and biofilm-forming) while increasing Lactobacillus abundance. Compound additive use further improved fermentation quality (significantly increased the lactic acid (LA) content and decreased the pH values and ammonia nitrogen (a-N) content) and nutrient quality (significantly decreased the acid detergent fiber (ADF) content and increased the water-soluble carbohydrate (WSC) content) and optimized the microbial community (increased the Lactobacillus abundance). Fermentation also altered the flavonoids, alkaloids and phenols contents in the residues with minor effects on the functional metabolites amounts. The LJT residues metabolic profile was mainly attributed to its epiphytic bacteria, with a small contribution from the compound additive. Thus, compound additives may improve anaerobic LJT residue fermentation without functionally impairing the metabolites.