2016
DOI: 10.1007/s00253-016-7525-5
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Enrichment of microbial communities tolerant to the ionic liquids tetrabutylphosphonium chloride and tributylethylphosphonium diethylphosphate

Abstract: Aims: The aims of this study were to identify thermophilic microbial communities that degrade green waste in the presence of the ionic liquids (IL) tetrabutylphosphonium chloride and tributylethylphosphonium diethylphosphate and examine preservation methods for IL tolerant communities.Methods and Results: High-solids incubations with step-wise increases in IL concentration were conducted to enrich for thermophilic IL tolerant communities. 16S rRNA sequencing of enriched communities revealed microorganisms capa… Show more

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Cited by 7 publications
(6 citation statements)
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“…However, to date there are only few studies that have investigated IL tolerant microorganisms found in nature and identified metabolic pathways responsible for IL tolerance. Recently, enrichment cultures have been applied for discovering IL tolerant microorganisms from environmental samples by generating less complex lignocellulolytic microbial communities and facilitating the discovery of potential enzymes and microorganisms for biomass deconstruction (Pace et al 2016;Reddy et al 2012;Simmons et al 2014;Singer et al 2011). However, further studies on IL tolerant microbial communities using metagenomic and metatranscriptomic analyses are needed to understand how organisms in a community work synergistically to tolerate ILs.…”
Section: Discussionmentioning
confidence: 99%
“…However, to date there are only few studies that have investigated IL tolerant microorganisms found in nature and identified metabolic pathways responsible for IL tolerance. Recently, enrichment cultures have been applied for discovering IL tolerant microorganisms from environmental samples by generating less complex lignocellulolytic microbial communities and facilitating the discovery of potential enzymes and microorganisms for biomass deconstruction (Pace et al 2016;Reddy et al 2012;Simmons et al 2014;Singer et al 2011). However, further studies on IL tolerant microbial communities using metagenomic and metatranscriptomic analyses are needed to understand how organisms in a community work synergistically to tolerate ILs.…”
Section: Discussionmentioning
confidence: 99%
“…275 Thus, a search for IL-tolerant valuable microbial communities is ongoing. 276 From the medical point of view, ever-evolving resistance of microorganisms to the existing drugs is an urgent issue, and a whole new class of possible antimicrobial agents is a very timely finding. Targeted attempts to develop antimicrobial ILs for medical purposes have been made.…”
Section: Ionic Liquids As Antibacterial and Antifungal Agentsmentioning
confidence: 99%
“…While the ability for the TBPH-water solution to dissolve cellulose with high water concentrations makes it particularly attractive as an industrial solvent, as it may not require a pre-drying step, another key economic factor for the success of any IL is its ability to support stable downstream processes. In general, TBP + decreases microbial activity and thus enzymatic activity as well; however, Chelatococcus proteobacteria have shown good microbial activity at low [TBP][Cl] concentrations [59]. This proteobacterium, paired with TBP + , maybe a stable and compatible means of digesting cellulose, but more research is needed in this area [59].…”
Section: Discussionmentioning
confidence: 99%
“…In general, TBP + decreases microbial activity and thus enzymatic activity as well; however, Chelatococcus proteobacteria have shown good microbial activity at low [TBP][Cl] concentrations [59]. This proteobacterium, paired with TBP + , maybe a stable and compatible means of digesting cellulose, but more research is needed in this area [59]. TBP-based ILs are at least somewhat bio-tolerant at dilute concentrations, indicating the downstream processes could be technically and economically feasible.…”
Section: Discussionmentioning
confidence: 99%