Your browser doesn't support javascript.
loading
[Change in Granulation Potential and Microbial Enrichment Characteristics of Sludge Induced by Microplastics].
Xie, Qing-Fan; Yu, Nan; Zhang, Ni; Xie, Zhou-Yun; Shan, Ke-Xin; Wu, Yi-Xin; Tang, Li; Xia, Jing-Fen; Yang, Guo-Jing.
Afiliación
  • Xie QF; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Yu N; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Zhang N; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Xie ZY; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
  • Shan KX; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Wu YX; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Tang L; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Xia JF; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
  • Yang GJ; College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China.
Huan Jing Ke Xue ; 44(7): 3997-4005, 2023 Jul 08.
Article en Zh | MEDLINE | ID: mdl-37438298
Microplastics (MPs), as a new type of pollutant, are widely detected in sewage treatment plants. Currently, research on MPs in traditional sewage treatment systems has mainly been focused on the pollution level and distribution characteristics, with a lack of studying the impact of MPs on the sludge granulation. In order to explore the effect of MPs on the granulation process, a microplastic exposure test was conducted by adding polyethylene terephthalate microplastics (PET-MPs), which are widespread in the environment. The operating performance of the system, extracellular polymeric substance (EPS) composition, and flora enrichment were analyzed on the sludge granulation. The results showed that the exposure of PET-MPs significantly accelerated the sludge granulation process, whereas the increase in EPS content dominated by PN enhanced the sludge surface hydrophobicity; the granulation rate and EPS secretion were proportional to the exposed particle size. Microplastics and EPS secretions synergistically promoted the formation of granular sludge. However, continuous microplastic exposure led to deterioration of the system decontamination performance and inhibited the degradation process of pollutants, with the most negative effect of nitrite nitrogen accumulation under 250 µm PET-MPs exposure, as high as (5.08±0.24) mg·L-1. The high-throughput sequencing revealed that the microbial community diversity fell in the experimental group. The dominant bacteria at the phylum level were Proteobacteria and Bacteroidota on the sludge granulation. Rhodocyclaceae, Sphingomonadaceae, Flavobacteriaceae, and Rhodanobacteraceae promoted flocculation by increasing EPS secretion. The decrease in Comamonadaceae and Chitinophagaceae weakened the ammonia and nitrite oxidation capacity of the system, whereas the decrease in Rhodobacteraceae, Hyphomonadaceae, and Xanthomonadaceae inhibited the removal of nitrate nitrogen.
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: Contaminantes Ambientales / Matriz Extracelular de Sustancias Poliméricas Idioma: Zh Revista: Huan Jing Ke Xue Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: China
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: Contaminantes Ambientales / Matriz Extracelular de Sustancias Poliméricas Idioma: Zh Revista: Huan Jing Ke Xue Año: 2023 Tipo del documento: Article País de afiliación: China Pais de publicación: China