Bio-filtration of trichloroethylene using diazotrophic bacterial community

Shukla, Awadhesh Kumar; Vishwakarma, Poonam; Singh, Ram Sharan; Upadhyay, S.N.; Dubey, Suresh Kumar

doi:10.1016/j.biortech.2009.10.094

Cited by 25 publications

(16 citation statements)

References 23 publications

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“…S6 in the supplemental material). The speed of these community-level shifts is consistent with prior findings showing changes in VOC removal by bacterial communities after only days (48,49). So, given the lack of a strong time lag in community shifts and the distribution of proliferating bacterial species and strains across plant varieties, it appears that VOC degraders may be poised for activity across a range of ornamental plants, enabling the use of many varieties in green biofilters.…”

Section: Discussionsupporting

confidence: 87%

Indoor-Biofilter Growth and Exposure to Airborne Chemicals Drive Similar Changes in Plant Root Bacterial Communities

Russell

Chau

et al. 2014

Appl Environ Microbiol

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Due to the long durations spent inside by many humans, indoor air quality has become a growing concern. Biofiltration has emerged as a potential mechanism to clean indoor air of harmful volatile organic compounds (VOCs), which are typically found at concentrations higher indoors than outdoors. Root-associated microbes are thought to drive the functioning of plant-based biofilters, or biowalls, converting VOCs into biomass, energy, and carbon dioxide, but little is known about the root microbial communities of such artificially grown plants, how or whether they differ from those of plants grown in soil, and whether any changes in composition are driven by VOCs. In this study, we investigated how bacterial communities on biofilter plant roots change over time and in response to VOC exposure. Through 16S rRNA amplicon sequencing, we compared root bacterial communities from soil-grown plants with those from two biowalls, while also comparing communities from roots exposed to clean versus VOC-laden air in a laboratory biofiltration system. The results showed differences in bacterial communities between soilgrown and biowall-grown plants and between bacterial communities from plant roots exposed to clean air and those from VOCexposed plant roots. Both biowall-grown and VOC-exposed roots harbored enriched levels of bacteria from the genus Hyphomicrobium. Given their known capacities to break down aromatic and halogenated compounds, we hypothesize that these bacteria are important VOC degraders. While different strains of Hyphomicrobium proliferated in the two studied biowalls and our lab experiment, strains were shared across plant species, suggesting that a wide range of ornamental houseplants harbor similar microbes of potential use in living biofilters.

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Section: Discussionsupporting

confidence: 87%

Indoor-Biofilter Growth and Exposure to Airborne Chemicals Drive Similar Changes in Plant Root Bacterial Communities

Russell

Chau

et al. 2014

Appl Environ Microbiol

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“…Biofilter setup was the same as described earlier (Shukla et al, 2010). The packing media used were the small cubical pieces of wood charcoal prepared and characterized as described earlier (Shukla et al, 2010).…”

Section: Bio-filtration Setup and Its Operationmentioning

confidence: 99%

“…Bacterial communities such as methanotrophs, nitrifires and diazotrophs have been used for biodegradation of TCE due to wide range of their toxicity tolerance. These microorganisms co-metabolise TCE in the presence of their respective primary growth substrates such as methanol, methane, ammonia and malate (Benstead et al, 1998;Shukla et al, 2009Shukla et al, , 2010Kocamemi and Cecen, 2010). Since methanotrophs are physiologically multifaceted in their potential to survive in various ecological niche with an extensive range of pH, temperature, O 2 and heavy metal concentrations (Hakemian and Rosenzweig, 2007), their potential could be utilized more effectively for biodegradation of VOC pollutants like TCE.…”

Section: Introductionmentioning

confidence: 98%

“…(Hazen et al, 2009). Due to its continuous emission into ecosystems, it poses risk to human health (Ruder, 2006), therefore, efforts are being made to develop appropriate technologies for the removal of TCE from contaminated environmental components like air (Kan and Deshusses, 2006;Popat and Deshusses, 2009;Shukla et al, 2010). Bio-filtration, in which microbial community is immobilized on a solid support in the form of biofilm, has emerged as a promising and cost effective technique for biodegradation of volatile toxic pollutants (Wani et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of bio-filtration of trichloroethylene by methanotrophs in presence of methanol

Shukla

Singh

Upadhyay

et al. 2010

Bioresource Technology

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“…Therefore, TCE causes dangers to ecology safety and human health. Moreover, the treatment of TCE has been investigated in aerobic reactors (Shukla et al 2009(Shukla et al , 2010 and some kinds of anaerobic reactors such as anaerobic hybrid reactor (Mitra and Gupta 2013) and expanded granular sludge bed (EGSB) bioreactors (Siggins et al 2011a, b); however, research about TCE treatment in the UASB reactor was limited (Ozdemir et al 2007). In addition, until now, there are few studies on the variations of bacterial community under different operation conditions of TCE treatment in the anaerobic reactors.…”

Section: Introductionmentioning

confidence: 98%

Analysis of trichloroethylene removal and bacterial community function based on pH-adjusted in an upflow anaerobic sludge blanket reactor

Zhang

et al. 2015

Appl Microbiol Biotechnol

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The study reported the upflow anaerobic sludge blanket (UASB) reactor performance in treating wastewater containing trichloroethylene (TCE) and characterized variations of bacteria composition and structure by changing the pH from 6.0 to 8.0. A slightly acidic environment (pH < 7.0) had a greater impact on the TCE removal. Illumina pyrosequencing was applied to investigate the bacterial community changes in response to pH shifts. The results demonstrated that pH greatly influenced the dominance and presence of specific populations. The potential TCE degradation pathway in the UASB reactor was proposed. Importantly, the genus Dehalobacter which was capable of reductively dechlorinating TCE was detected, and it was not found at pH of 6.0, which presumably is the reason why the removal efficiency of TCE was the lowest (80.73 %). Through Pearson correlation analyses, the relative abundance of Dehalobacter positively correlated with TCE removal efficiency (R = 0.912). However, the relative abundance of Lactococcus negatively correlated with TCE removal efficiency according to the results from Pearson correlation analyses and redundancy analysis (RDA).

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Bio-filtration of trichloroethylene using diazotrophic bacterial community

Cited by 25 publications

References 23 publications

Indoor-Biofilter Growth and Exposure to Airborne Chemicals Drive Similar Changes in Plant Root Bacterial Communities

Indoor-Biofilter Growth and Exposure to Airborne Chemicals Drive Similar Changes in Plant Root Bacterial Communities

Kinetics of bio-filtration of trichloroethylene by methanotrophs in presence of methanol

Analysis of trichloroethylene removal and bacterial community function based on pH-adjusted in an upflow anaerobic sludge blanket reactor

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