Microbial Communities and Nitrogen-Utilizing Bacteria of Rotating Biological Contactors and Activated Sludge Treating Public Sewage and Night Soil/Johkasou Sludge
| Autor: | Naoki Miyazato, Yu Yamanashi, Naoki Noguchi, Toru Aoi, Tsukasa Ito |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Sewage Rotating biological contactor Environmental technology. Sanitary engineering River lake and water-supply engineering (General) Denitrifying bacteria Waste Management and Disposal TD1-1066 night soil and johkasou sludge Water Science and Technology TC401-506 biology business.industry Chemistry Ecological Modeling hemic and immune systems rotating biological contactor (rbc) biology.organism_classification Pulp and paper industry Pollution Activated sludge Microbial population biology Nitrifying bacteria Night soil microbial community nitrifying bacteria business denitrifying bacteria Bacteria circulatory and respiratory physiology |
| Zdroj: | Journal of Water and Environment Technology, Vol 19, Iss 3, Pp 109-119 (2021) |
| ISSN: | 1348-2165 |
| Popis: | The public sewage (PS) and night soil mixed with johkasou sludge (JO) have similar chemical compositions; however, the concentrations of organic matter and nitrogen compounds were different. We investigated the microbial community of the rotating biological contactor (RBC) units treating PS and JO, in which the RBC was submerged in the mixed liquor of activated sludge. Here, we observed that the microbial community compositions at the phylum and class levels were similar between the PS-RBC and JO-RBC, whereas the relative abundances of several phyla (Euryarchaeota, Acidobacteria, Chloroflexi, Firmicutes, Patescibacteria, and Betaproteobacteria) significantly differed between them. The microbial community composition of RBC (an attached growth process) was similar to that of the activated sludge (a suspended growth process). The microbial community of activated sludge likely affected that of RBC. The relative abundance of total denitrifying bacteria in the PS-RBC was twice as much as that in JO-RBC, while nitrifying bacterial phylotypes had a similar relative abundance. The predominant denitrifying genera were different between the PS-RBC and JO-RBC, as well as in the cross-sectional layers of the PS-RBC, suggesting the functional diversity of denitrifying bacterial genera inhabiting the RBC. |
| Databáze: | OpenAIRE |
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