Exploring the characteristics of dissolved organic matter and succession of bacterial community during composting. (November 2019)

• Record Type: Journal Article
• Authors: Jiang, Zhiwei; Lu, Yanyu; Xu, Jiaqi; Li, Mingqi; Shan, Guangchun; Li, Qunliang
• Is Part Of: Bioresource technology. Volume 292(2019)
• Publication Date: 2019-11
• Subjects: Bacterial community -- Characteristics -- Composting -- Dissolved organic matter -- Succession; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2019.121942
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The values of GI, EC, and C/N indicated the final compost reached maturity and safety. Temperature, pH, and TKN were main factors driving the succession of bacterial phylum. Firmicutes was a crucial phylum degrading organic matters for DOM formation. Both Luteimonas and Sphingobacteriaceae contribute to the characteristics of DOM. Abstract: The objective of this study was to explore the relationships among physico-chemical parameters, dissolved organic matters (DOM), and bacterial community during composting to better understand composting performances. The results showed total Kjeldahl nitrogen (TKN) (57%), temperature (39%), and pH (3%) were main factors driving the succession of bacterial communities. Firmicutes was a crucial phylum degrading organic matters for DOM formation, whereas the aromaticity and humification of DOM were closely related to Luteimonas (R 2 = 0.971, p < 0.05) and Sphingobacteriaceae (R 2 = 0.931, p < 0.05). Additionally, total phosphorus (TP), total potassium (TK), and TKN increased by 34.84%, 43.66%, and 65.91%, respectively, while organic matter decreased by 61.79%. The final compost had a C/N of 6.91 (<15) and a germination index of 97.81% (>80%), indicating that compost reached maturity and could be safely applied for soil amendment.