Your browser doesn't support javascript.
loading
Incorporating microbial inoculants to reduce nitrogen loss during sludge composting by suppressing denitrification and promoting ammonia assimilation.
Liang, Xueling; Wen, Xiaoli; Yang, Hongmei; Lu, Heng; Wang, Ao; Liu, Shuaipeng; Li, Qunliang.
Afiliación
  • Liang X; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Wen X; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Yang H; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Lu H; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Wang A; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Liu S; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
  • Li Q; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China. Electronic address: liqunliang231@gxu.edu.cn.
Sci Total Environ ; 915: 170000, 2024 Mar 10.
Article en En | MEDLINE | ID: mdl-38242453
ABSTRACT
To address the challenge of increasing nitrogen retention in compost, this study investigated the effects of microbial communities on denitrification and ammonia assimilation during sludge composting by inoculating microbial inoculants. The results showed that the retention rates of total Kjeldahl nitrogen (TKN) and humic acid (HA) in MIs group (with microbial inoculants) were 4.94 % and 18.52 % higher than those in the control group (CK), respectively. Metagenomic analysis showed that Actinobacteria and Proteobacteria were identified as main microorganisms contributing to denitrification and ammonia assimilation. The addition of microbial agents altered the structure of the microbial community, which in turn stimulated the expression of functional genes. During cooling period, the ammonia assimilation genes glnA, gltB and gltD in MIs were 15.98 %, 24.84 % and 32.88 % higher than those in CK, respectively. Canonical correspondence analysis revealed a positive correlation between the dominant bacterial genera from the cooling stage to the maturity stage and the levels of NO3--N, NH4+-N, HA, and TKN contents. NH4+-N was positively correlated with HA, indicating NH4+-N might be incorporated into HA. Heat map and network analyses revealed NH4+-N as a key factor affecting functional genes of denitrification and ammonia assimilation, with Nitrospira identified as the core bacteria in the microbial network. Therefore, the addition of microbial agents could increase nitrogen retention and improve compost product quality.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compostaje / Inoculantes Agrícolas Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Compostaje / Inoculantes Agrícolas Tipo de estudio: Prognostic_studies Idioma: En Revista: Sci Total Environ Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos