Anaerobic co-digestion of molasses vinasse and three kinds of manure: A comparative study of performance at different mixture ratio and organic loading rate. (15th October 2022)

• Record Type: Journal Article
• Authors: Qin, Ya; Huang, Luodong; Jiang, Qiong; Lu, Tiedong; Xin, Yuan; Zhen, Yuantao; Liu, Jiantao; Shen, Peihong
• Is Part Of: Journal of cleaner production. Volume 371(2022)
• Publication Date: 2022-10-15
• Subjects: Animal manure -- Co-digestion -- Organic loading rate -- Microbial diversity; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.133631
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Studies have shown that animal manures have a promoting effect in improving anaerobic digestion (AD). In this study, swine manure, chicken manure, and cattle manure (named in order SM, CM, and BM groups) were selected as co-digestion substrates of molasses vinasse (MV). The AD performance of three combinations was compared at the same organic loading rate (OLR) of different ratios (manure SCOD : MV SCOD of 1:1, 1:3, 1:5, 1:7, 1:9, stage I), and at the same ratio with increased OLR (ratio of 1:7, stage II) conditions. In stage I, all groups worked well for the 1:7 ratio, with CM performing better than the other groups. As the ratio increased to 1:9, the AD performances of all groups obviously decreased, while the BM group was more stable, with a soluble chemical oxygen demand (SCOD) removal rate 11.7% higher than for the SM group and 12.2% for CM group. In stage II, the SCOD removal efficiency of the CM group was the best and reached 70.9 ± 0.4%. The microbial community analyses indicated that the hydrogenotrophic methanogen Methanobacteriaceae were dominant in the CM group. Synergistaceae with the function of acetogenesis, and Anaerolineaceae with the function of hydrolyzing polysaccharides, were enriched in stages I and II, respectively. In stage I with the ratio of 1:9, the Anaerolineaceae and acetotrophic methanogens Methanosarcinaceae played an important role in the BM group. This study utilized waste as a mixed raw material without increasing the cost of raw materials, the optimal mixed co-digestion ratio and the tolerance to high OLR impact of the stable and efficient MV anaerobic system reactor were determined. The results provide a reference for the treatment of animal manure as a substrate for anaerobic co-digestion of MV and also provide promising potential for the engineering application of anaerobic co-digestion of MV in biogas plants. Graphical abstract: Image 1 Highlights: Manure ratio and organic loading rate (OLR) affected co-digestion efficiency. Cattle manure showed stable digestion at low OLR and high ratio of molasses vinasse. Chicken manure showed advantages at high OLR and high ratio of molasses vinasse. Synergistaceae, Anaerolineaceae, and Methanobacteriaceae played key roles. Anaerobic digestion (AD) of molasses vinasse with cattle, chicken, or swine manure.