Activated sludge bacterial communities of typical wastewater treatment plants: distinct genera identification and metabolic potential differential analysis

Abstract

To investigate the differences in activated sludge microbial communities of different wastewater treatment plants (WWTPs) and understand their metabolic potentials, we sampled sludge from every biological treatment unit of 5 full-scale waste water treatment systems in 3 typical Chinese municipal WWTPs. The microbial communities and overall metabolic patterns were not only affected by influent characteristics but also varied between different biological treatment units. Distinct genera in different wastewater treatment systems were identified. The important microorganisms in domestic sewage treatment systems were unclassified SHA-20, Caldilinea, Dechloromonas, and unclassified genera from Rhodospirilaceae and Caldilineaceae. The important microorganisms in dyeing wastewater treatment systems were Nitrospira, Sphingobacteriales, Thiobacillus, Sinobacteraceae and Comamonadaceae. Compared with the obvious differences in microbial community composition, the metabolic potential showed no significant differences.Electronic supplementary materialThe online version of this article (10.1186/s13568-018-0714-0) contains supplementary material, which is available to authorized users.

Characterization of the Spatial Variation of Microbial Communities in a Decentralized Subtropical Wastewater Treatment Plant Using Passive Methods

“…Families Xanthomonadaceae and Nitrospiraceae exhibited a decreasing trend from the inlet to the outlet (Figures 5c and 6c). These families are known to be aerobic bacteria [72] involved in nitrification [73] in significant symbiotic interactions with plants [74]. This decreasing trend could be related to the ammonia concentration which also decreased along the HFCW.…”

Impact of Non-Metallic Organic Tanning Agents with a Double-Triazine Structure on the Microbial Community Structure in Wastewater

“…The dominant bacterial genera were Acidocella (18.33%), Turicibacter (6.48%), Clostridium sensu stricto (6.45%), and Bacillus (3.37%). In T4, the dominant The presence of Clostridium, Pseudomonas, and Acidocella had a denitrification effect, whereas the presence of Aeromonas and Raoultella dephosphorized the bistriazine wastewater [16,[27][28][29][30]. Lactococcus removed ammonia-nitrogen more effectively, indicating that the bacteria responsible for denitrification were predominant, whereas the bacteria responsible for dephosphorization and the removal of ammonia-nitrogen were dominant in the blank control wastewater.…”

Bacterial community structure in rotating biological contactor treating coke wastewater in relation to medium composition

“…The structure and the dynamics of this microbial community can be influenced by external factors such as pH, temperature, substrate, and oxygen concentration (Cydzik-Kwiatkowska and Zielińska 2016 ). One of the factors influencing bacterial community during wastewater treatment is the wastewater composition (Cydzik- Kwiatkowska et al 2012; Zhang et al 2018 ). The feeding medium change (from municipal to industrial or from synthetic to real wastewater) can cause a drastic shift of the bacterial community structure and it can influence dramatically nitrogen and recalcitrant removal.…”

“…The feeding medium shift, highly dangerous for activated sludge bacteria, can be led in biofilm-based systems with the relatively lower possibility of bacterial community damage because of the high amount of extrapolimeric substances (EPS) protective against harmful physico-chemical factors influencing the biocoenosis. Moreover, biofilm-based systems are recognized to be an excellent model for ecological relationships research among bacteria in the community due to their direct contact and relatively closer location to each other (Cydzik-Kwiatkowska et al 2012 ; Zhang et al 2018 ).…”