Evolutions of different microbial populations and the relationships with matrix properties during agricultural waste composting with amendment of iron (hydr)oxide nanoparticles. (October 2019)

• Record Type: Journal Article
• Authors: Zhang, Lihua; Dong, Haoran; Zhu, Yuan; Zhang, Jiachao; Zeng, Guangming; Yuan, Yujie; Cheng, Yujun; Li, Long; Fang, Wei
• Is Part Of: Bioresource technology. Volume 289(2019)
• Publication Date: 2019-10
• Subjects: Composting -- Microbial populations -- Fe (hydr)oxide nanoparticles -- Redundancy analysis -- Partial least-squares path modeling; 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.2019.121697
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Effects of Fe (hydr) oxide NPs on bacteria, fungi and actinomycetes were studied. PLS-PM was used to evaluate relationships between microbial abundances and factors. Nanohematite was more effective to increase bacteria and fungi abundances. Temperature was the most significant factor influencing each microbial abundances. Actinomycetes was more sensitive to changes of environmental factors. Abstract: This study investigated the evolutions of different microbial populations and multivariate relationships between their abundances and environmental variables during composting with amendment of Fe (hydr)oxide nanoparticles. Piles treated with nanohematite and nanomagnetite were denoted as T-nanohematite and T-nanomagnetite, and another one was T-control. It was found that nanohematite more effectively increased bacteria and fungi abundances with 1.24∼1.58 times average value of T-control, while nanomagnetite was more useful to actinomycetes. As the most significant variable, the total effect of temperature in T-control and T-nanomagnetite was increased to 0.87 and 0.92, respectively, because both the direct and indirect effects were positive, while it in T-nanohematite was reduced to 0.18 by the negative indirect effect. Partial redundancy analysis suggested that each microbial abundance shared different relationships with composting parameters. Overall, actinomycetes was more sensitive to changes of composting parameters than bacteria and fungi.