scholarly journals Relationship between microbial activity and microbial community structure in six full-scale anaerobic digesters

2012 ◽  
Vol 167 (10) ◽  
pp. 581-589 ◽  
Author(s):  
Leticia Regueiro ◽  
Patricia Veiga ◽  
Mónica Figueroa ◽  
Jorge Alonso-Gutierrez ◽  
Alfons J.M. Stams ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Activity ◽  
Microbial Community Structure ◽  
Full Scale ◽  
Anaerobic Digesters

scholarly journals A full-scale survey of sludge landfill: sludge properties, leachate characteristics and microbial community structure

2019 ◽  
Vol 80 (6) ◽  
pp. 1185-1195 ◽  
Author(s):  
Xiaodan Zhao ◽  
Jiazhe Yang ◽  
Chengqin Tu ◽  
Zhen Zhou ◽  
Wei Wu ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Community Analysis ◽  
Organic Content ◽  
Full Scale ◽  
Waste Landfill ◽  
Leachate Characteristics ◽  
Main Pathway ◽  
Sludge Properties

Abstract In this study, a full-scale survey was conducted of a sludge landfill that had been sealed for 10 years to investigate sludge properties, leachate characteristics and microbial community structure. Vertical distribution of sludge and leachate pollutants in the landfill site showed that the sludge and soluble pollutants in the leachate were both distributed almost evenly even after long-term anaerobic digestion, and higher concentrations of soluble pollutants and richness of microbial community were observed at the middle layer. Compared to dewatered excess sludge generated from the activated sludge process before landfill, landfill sludge had a much lower organic content (28.1%), smaller particle size and worse dewaterability. Compared to municipal waste landfill, sludge landfill generated leachate with a lower concentration of organic substances, and comparable concentrations of nitrogenous and phosphorus pollutants. Bacterial community analysis by Illumina MiSeq sequencing showed that Proteobacteria, Firmicutes, Chloroflexi, Actinobacteria and Bacteroidetes were the major phyla, and some new genera (Methylocystaceae, Mariniphaga and Aminicenantes) were enriched in the sludge landfill. Archaeal community analysis showed that aceticlastic methanogenesis by Methanosaeta and Methanosarcina was the main pathway for methane production in the sludge landfill, in contrast to waste landfill with hydrogenotrophic methanogenesis as the main pathway.

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