Greenhouse gas emission during swine manure aerobic composting: Insight from the dissolved organic matter associated microbial community succession. (April 2023)

• Record Type: Journal Article
• Authors: Bao, Meiwen; Cui, Hu; Lv, Yan; Wang, Lixia; Ou, Yang; Hussain, Naseer
• Is Part Of: Bioresource technology. Volume 373(2023)
• Publication Date: 2023-04
• Subjects: Compost -- Greenhouse gas -- Dissolved organic matter -- Bacterial communities -- Functional genes; 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.2023.128729
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Proper material volume ratio (manure: straw = 1:3) reduced the total GHG emissions. Various DOM components explained the CH4 and N2 O emissions in manure composting. The ratio of related functional genes was correlated with CH4 and N2 O. Abstract: Greenhouse gas emissions during aerobic composting is unavoidable, but good practices can minimize emission. Therefore, to explore the key factors influencing the release of greenhouse gas emissions during composting, the inaction of organic matter conversion, greenhouse gas emissions and bacterial community structure during co-composting with different ratio (pig manure and corn straw) over a 6-week period was studied. The excitation-emission matrix fluorescence spectroscopy with the parallel factor was used to identify that dissolved organic matter associated microbial community succession mainly influenced greenhouse gas emissions. Protein-like fractions of dissolved organic matter were more likely to decompose and promote CH4 and CO2 emissions, while the humic-like fractions of dissolved organic matter positively affected N2 O emissions. The largest of greenhouse gas emissions was appeared in MR2 with 12.7 kg CO2 -eq, and the MR3 and MR4 reduced greenhouse gas emissions by 26.8 % and 11.4 %, respectively.