Heterogeneity of microbial community structures inside the up-flow biological activated carbon (BAC) filters for the treatment of drinking water

Liao, Xiaobin; Chen, Chao; Chang, Chih‐Hsiang; Wang, Zhao; Zhang, Xiaojian; Xie, Shuguang

doi:10.1007/s12257-012-0127-x

Cited by 40 publications

(27 citation statements)

References 18 publications

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“…Li et al (2010) found that Betaproteobacteria was the most abundant bacterial group both in bench-scale and pilot-scale BAC reactors. Alphaproteobacteria, Gammaproteobacteria, and Acidobacteria were the major bacterial groups in a pilot-scale up-flow BAC filtration system (Liao et al 2012).…”

Section: Bacterial Community Structuresmentioning

confidence: 98%

“…Based on the significant difference between bacterial communities in raw water and on BAC, Soonglerdsongpha et al (2011) suggested that bacterial community structure changed along the BAC filtration process. Previous studies showed the shift of bacterial community structure inside BAC systems (Liao et al 2012(Liao et al , 2013) and granular activated carbon-sand dual media filter (Feng et al 2013a). However, an earlier work using culture-dependent method indicated that BAC filtration did not change the nature of the bacterial populations associated with drinking water (Burlingame et al 1986).…”

Section: Bacterial Community Structuresmentioning

confidence: 99%

“…In addition, the combination of ozonation with BAC filtration has proven to be an efficient method in reduction in BDOC (Yapsakli and Cecen 2010). However, biomass developed in biofilters might be a source of bacterial contamination in DWDS (Niemi et al 2009;Liao et al 2012). Therefore, concerns regarding the microorganisms in the effluents of filters have been raised (Norton and LeChevallier 2000;Poitelon et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…However, only a small fraction of the viable bacterial cells present in drinking water could be identified using the traditional culture-dependent methods (Eichler et al 2006;Sartory et 2008). Molecular methods have been widely used to characterize the microbial community dynamics in drinking waters in DWDS (Berry et al 2006;Revetta et al 2010), and drinking water biofilters (Kasuga et al 2007;Feng et al 2012;Liao et al 2012). Since the presence of certain bacteria may lead to water quality problems in the downstream DWDS, knowledge of the bacterial ecology in the effluents of drinking water treatment units will be of practical importance.…”

Section: Introductionmentioning

confidence: 99%

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Bacterial community change through drinking water treatment processes

Liao

Chen

Wang

et al. 2014

Int. J. Environ. Sci. Technol.

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The microbiological quality of drinking water has aroused increasing attention due to potential public health risks. Knowledge of the bacterial ecology in the effluents of drinking water treatment units will be of practical importance. However, the bacterial community in the effluents of drinking water filters remains poorly understood. The changes of the density of viable heterotrophic bacteria and bacterial populations through a pilot-scale drinking water treatment process were investigated using heterotrophic plate counts and clone library analysis, respectively. The pilot-scale treatment process was composed of preozonation, rapid mixing, flocculation, sedimentation, sand filtration postozonation, and biological activated carbon (BAC) filtration. The results indicated that heterotrophic plate counts decreased dramatically through the drinking water treatment processes. Clone library analysis indicated the significant change of bacterial community structure through the water treatment processes. Betaproteobacteria was dominant in raw water, the sand filter effluent and the BAC filter effluent. This work could provide some new insights on drinking water microbial ecology.

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Section: Bacterial Community Structuresmentioning

confidence: 98%

Section: Bacterial Community Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bacterial community change through drinking water treatment processes

Liao

Chen

Wang

et al. 2014

Int. J. Environ. Sci. Technol.

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show abstract

“…This biocathode was made from a semicoke, which was obtained from the carbonization of organic matter below 700°C, similar to the condition of pyrolysis used here to produce biochar. Other sequences in this cluster were from a cathodic carbon fiber paper (JN802222; Xia et al, 2012), a submicronic filter of hemodialysis (AM087517; Gomila et al, 2006) and activated carbon filters (DQ646451, JQ237904, JQ926658; Hwang et al, 2006;Liao et al, 2012Liao et al, , 2013. Overall this shows that OTU0001 represents a new gammaproteobacterial group of uncultured bacteria, whose members are often associated with carbonized materials that can deliver electrons to cells.…”

Section: Resultsmentioning

confidence: 86%

Chemolithotrophic processes in the bacterial communities on the surface of mineral-enriched biochars

Joseph

et al. 2017

The ISME Journal

122

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Biochar and mineral-enriched biochar (MEB) have been used as soil amendments to improve soil fertility, sequester carbon and mitigate greenhouse gas emissions. Such beneficial outcomes could be partially mediated by soil bacteria, however little is known about how they directly interact with biochar or MEB. We therefore analyzed the diversity and functions of bacterial communities on the surfaces of one biochar and two different MEBs after a 140-day incubation in soil. The results show that the biochar and the MEBs harbor distinct bacterial communities to the bulk soil. Communities on biochar and MEBs were dominated by a novel Gammaproteobacterium. Genome reconstruction combined with electron microscopy and high-resolution elemental analysis revealed that the bacterium generates energy from the oxidation of iron that is present on the surface. Two other bacteria belonging to the genus Thiobacillus and a novel group within the Oxalbacteraceae were enriched only on the MEBs and they had the genetic capacity for thiosulfate oxidation. All three surface-enriched bacteria also had the capacity to fix carbon dioxide, either in a potentially strictly autotrophic or mixotrophic manner. Our results show the dominance of chemolithotrophic processes on the surface of biochar and MEB that can contribute to carbon sequestration in soil.

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Accumulation of manganese oxides in biological activated carbon filters: Implications for biodegradation studies

et al. 2022

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A comparison of granular and biological activated carbon (GAC and BAC) media used for drinking water treatment was made to assess differences in surface elemental composition. Fresh GAC, recently commissioned GAC and end-of-service life BAC from a water treatment plant in New Zealand were analyzed using scanning electron microscopy, energy-dispersive spectroscopy, and inductively coupled plasma-mass spectrometry (ICP-MS). Imaging revealed dense microbial colonization of the BAC surface compared to GAC media, and a mineralized surface layer high in manganese and oxygen. ICP-MS analysis also confirmed high levels of Mn in the BAC media relative to GAC media. As many bacterial species known to colonize BAC filters are also known as Mn oxidizers, this suggests a biogenic origin of the Mn-oxide deposition on the BAC surface. Given the properties of Mn-oxides, they may be implicated in the mechanism by which bacteria capture and metabolize substrates in BAC filters.

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Heterogeneity of microbial community structures inside the up-flow biological activated carbon (BAC) filters for the treatment of drinking water

Cited by 40 publications

References 18 publications

Bacterial community change through drinking water treatment processes

Bacterial community change through drinking water treatment processes

Chemolithotrophic processes in the bacterial communities on the surface of mineral-enriched biochars

Accumulation of manganese oxides in biological activated carbon filters: Implications for biodegradation studies

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