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作者:

Kang, Da (Kang, Da.) | Zheng, Ping (Zheng, Ping.) | Li, Wenji (Li, Wenji.) | Xu, Dongdong (Xu, Dongdong.) | Chen, Wenda (Chen, Wenda.) | Pan, Chao (Pan, Chao.)

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Scopus SCIE

摘要:

Anammox granular sludge processes are an attractive and efficient biotechnology in the field of wastewater treatment. In this study, the stratification patterns of anammox granular sludge bed (GSB) at steady states were illustrated and its relationship to microbial activity and community were systematically investigated under different nitrogen loading rates (NLRs). Morphological observation and quantitive particle size distribution analysis demonstrated that the GSB at low NLR was mainly composed of micro and fine granules with a big difference between bottom and top sludge layers. But at high NLR, the volumetric mean diameter (VMD) of GSB increased with the size distribution width (Span) declined forming a more homogeneous and coarse granules population. The particle size distribution parameters of GSB could be fast characterized by the optical lightness (L*) parameter (r=-0.771, p 0.01, n = 16) and held a significant correlation with the nitrogen removal rate (NRR) of anammox system (r > 0.9, p < 0.05). The microbial spatial distribution patterns of different sludge layers were further investigated by high-throughput sequencing. The microbial community alpha-diversity index and microbial abundance matrix proved that the community structure tend to coverage at high NLR. Significant difference of the relative abundance of microbial community was detected under different NLRs. The VMD of GSB held a significant correlation with the relative abundance of AnAOB (r = 0.556, p < 0.01, n = 16) and other common accompanying bacteria (Denitratisoma and Chloroflexi). This study proved that the apparent particle size distribution patterns of GSB could be a potential auxiliary indicator to reflect the microbial activity and com-munity, which can facilitate the innovative process monitor of anammox system based on visual features.

关键词:

Granular sludge bed Microbial abundance Anammox Lightness characterization Particle size distribution

作者机构:

  • [ 1 ] [Kang, Da]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment, Beijing, Peoples R China
  • [ 2 ] [Kang, Da]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China
  • [ 3 ] [Zheng, Ping]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China
  • [ 4 ] [Li, Wenji]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China
  • [ 5 ] [Xu, Dongdong]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China
  • [ 6 ] [Chen, Wenda]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China
  • [ 7 ] [Pan, Chao]Zhejiang Univ, Coll Environm & Resource Sci, Dept Environm Engn, Hangzhou, Peoples R China

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来源 :

ENVIRONMENTAL RESEARCH

ISSN: 0013-9351

年份: 2022

卷: 210

8 . 3

JCR@2022

8 . 3 0 0

JCR@2022

ESI学科: ENVIRONMENT/ECOLOGY;

ESI高被引阀值:47

JCR分区:1

中科院分区:2

被引次数:

WoS核心集被引频次: 12

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ESI高被引论文在榜: 0 展开所有

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