High-solids anaerobic co-digestion performances and microbial community dynamics in co-digestion of different mixing ratios with food waste and highland barley straw

Rui Bao, Yufang Wei, Ruolin Guan, Xiujin Li, Xuebin Lu, Siyuan Rong, Xiaoyu Zuo and Hairong Yuan

Energy, 2023, vol. 262, issue PB

Abstract: High-solids anaerobic co-digestion (HSACoD) performances and microbial community dynamics were investigated. Food waste (FW) and highland barley straw (HBS) were used as co-digestion substrates with mixing ratios of 1:1, 1:3, 1:5, 5:1, and 3:1 (FW: HBS) in an anaerobic digestion (AD) system with 20% total solids. The results showed that the highest methane yield was 509.5 mLN/gVS for FH51, which was 129.8% higher than that of the single HBS. Synergistic effects contributed 20.4%–30.9% to improving methane yields in the first 25 days. The HSACoD system displayed excellent buffer capacity. Fastidiosipila, Gallicola, Proteiniphilum, Aminobacterium, Syntrophaceticus, and W5053 were dominant genera. Methanobacterium, Methanosphaera, Methanoculleus, and Methanosarcina were the key methanogens, displaying high relative abundance. Functional profiling indicated a relative abundance of metabolic pathways of 36.9%–39.6%, with the next most prevalent pathways being cellular processes and signaling, and information storage and processing. Therefore, HSACoD of FW and HBS can enhance AD speed in the early phase of AD and improve system stability.

Keywords: High-solids anaerobic co-digestion (HSACoD); Food waste (FW); Highland barley straw (HBS); Microbial community; Methane yield (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222024112
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:262:y:2023:i:pb:s0360544222024112

DOI: 10.1016/j.energy.2022.125529

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().