Effects of potassium persulfate on nitrogen loss and microbial community during cow manure and corn straw composting. (November 2022)

• Record Type: Journal Article
• Authors: Mei, Juan; Li, Ben; Su, Lianghu; Zhou, Xiaojie; Duan, Enshuai
• Is Part Of: Bioresource technology. Volume 363(2022)
• Publication Date: 2022-11
• Subjects: Aerobic composting -- Persulfate -- Nitrogen retention -- Bacterial community; 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.2022.127919
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Potassium persulfate reduced nitrogen losses in air-dried cow manure composting. The peak value of NH4 + -N content decreased with potassium persulfate addition. The degradation of organic matter was promoted with 0.3–0.6% potassium persulfate. Potassium persulfate enriched thermophilic lignocellulose degrading bacteria. Abstract: Strong oxidants can reduce the emission of NH3 during composting. But as a commonly used oxidant, the influence of persulfate on nitrogen transformation during composting is unclear. In this study, the effects of 0.3 %–1.2 % potassium persulfate (PS) on nitrogen losses and microbial community during air-dried cow manure composting were investigated. The results showed that PS could reduce nitrogen losses compared to the control. This was because it decreased pH and the maximum NH4 + -N content of treatments, which was beneficial to nitrogen retention. In addition, Pseudoxanthomonas and Chelativorans were enriched compared to the control, which might be associated with NH4 + -N transformation and nitrogen fixation. Meanwhile, PS increased the abundance of thermophilic lignocellulose degrading bacteria, and 0.3 % and 0.6 % PS increased the maximum temperature and the duration of the thermophilic period. This study indicated that PS could reduce nitrogen losses in composting and greatly influence nitrogen transforming and lignocellulose degrading bacteria.