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Christof Holliger

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Publications associées (95)

Correlations between environmental variables and bacterial community structures suggest Fe(III) and vinyl chloride reduction as antagonistic terminal electron-accepting processes

Christof Holliger, Pierre Rossi, Noam Shani

Natural attenuation of anaerobic aquifers contaminated with tetrachloroethene (PCE) often results in the accumulation of the intermediates cis-dichloroethene and vinyl chloride (VC) which are even more toxic than the parent compound. Reasons for this accum ...

Amer Chemical Soc2013

Assessment of bacterial and structural dynamics in aerobic granular sludge biofilms

Christof Holliger, David Gregory Weissbrodt, Yoan Rappaz

Aerobic granular sludge (AGS) is based on self-granulated flocs forming mobile biofilms with a gel-like consistence. Bacterial and structural dynamics from flocs to granules were followed in anaerobic-aerobic sequencing batch reactors (SBR) fed with synthe ...

Frontiers Media SA2013

Ecology and Biogeography of Bacterial Communities Associated with Chloroethene-Contaminated Aquifers

Christof Holliger, Pierre Rossi, Noam Shani

Massive usage, along with careless handling, storage, spills, and leakages made chloroethenes (CEs) one of the most abundant classes of groundwater contaminants. Anaerobic organohalide respiring bacteria (OHRB) can couple reductive dechlorination of CEs wi ...

Frontiers Media SA2012

Evaluation of silicate minerals for pH control during bioremediation: Application to chlorinated solvents

Christof Holliger, David Andrew Barry, Alessandro Brovelli, Elsa Marina Lacroix

Accurate control of groundwater pH is of critical importance for in situ biological treatment of chlorinated solvents. This study evaluated a novel approach for buffering subsurface pH that relies on the use of silicate minerals as a long-term source of al ...

2012

Intensity of Light Incident and Photoperiod of LED illumination based system on Scenedesmus vacuolatus growth

Jean-Paul Schwitzguebel, Christof Holliger, Olivier Laurent Emery, Christian Ludwig, Mariluz Bagnoud, Eduardo Pereira Gomes

2012

Microalgal carotenoid recovery in a biorefinery approach

Jean-Paul Schwitzguebel, Christof Holliger, Olivier Laurent Emery, Christian Ludwig, Mariluz Bagnoud, Eduardo Pereira Gomes

2012

PyroTRF-ID: a novel bioinformatics methodology for the affiliation of terminal-restriction fragments using 16S rRNA gene pyrosequencing data

Christof Holliger, Julien Maillard, David Gregory Weissbrodt, Lucas Sinclair, Pierre Rossi, Noam Shani, Jacques Rougemont

Background: In molecular microbial ecology, massive sequencing is gradually replacing classical fingerprinting techniques such as terminal-restriction fragment length polymorphism (T-RFLP) combined with cloning-sequencing for the characterization of microb ...

BioMed Central2012

An unusual tandem-domain rhodanese harbouring two active sites identified in Desulfitobacterium hafniense

Christof Holliger, Julien Maillard, Emmanuelle Rohrbach, Laure Prat

The rhodanese protein domain is common throughout all kingdoms of life and is characterized by an active site cysteine residue that is able to bind sulfane sulfur and catalyse sulfur transfer. No unique function has been attributed to rhodanese-domain-cont ...

Wiley-Blackwell2012

The Physiological Opportunism of Desulfitobacterium hafniense Strain TCE1 towards Organohalide Respiration with Tetrachloroethene

Christof Holliger, Julien Maillard, Aurélie Duret

Desulfitobacterium hafniense strain TCE1 is capable of metabolically reducing tetra- and trichloroethenes by organohalide respiration. A previous study revealed that the pce gene cluster responsible for this process is located on an active composite transp ...

American Society for Microbiology2012

Dynamics of Microbial Community Structure of and Enhanced Biological Phosphorus Removal by Aerobic Granules Cultivated on Propionate or Acetate

Christof Holliger, Graciela Gonzalez Gil

Aerobic granules are dense microbial aggregates with the potential to replace floccular sludge for the treatment of wastewaters. In bubble-column sequencing batch reactors, distinct microbial populations dominated propionate-and acetate-cultivated aerobic ...

American Society for Microbiology2011

Anaerobic degradation of vinyl chloride in aquifer microcosms

Christof Holliger

The anaerobic degradation potential at a chloroethene-contaminated site was investigated by operating two anoxic column aquifer microcosms enriched in iron(III). One column was fed with vinyl chloride (VC) only (column A) and one with acetate in addition ( ...

American Society of Agronomy2011

Frequent concomitant presence of Desulfitobacterium spp. and “Dehalococcoides” spp. in chloroethene-dechlorinating microbial communities

Christof Holliger, Katia Szynalski, Julien Maillard

The presence of chloroethene dechlorination activity as well as several bacterial genera containing mainly organohalide respiring members was investigated in 34 environmental samples from 18 different sites. Cultures inoculated with these environmental sam ...

Springer-Verlag2011

Redundancy and specificity of multiple Trigger Factor chaperones in Desulfitobacteria

Christof Holliger, Julien Maillard

The ribosome-bound Trigger Factor (TF) chaperone assists folding of newly synthesized polypeptides and participates in the assembly of macromolecular complexes. In the present study we showed that multiple distinct TF paralogues are present in genomes of D ...

2011

Reductive dechlorination of tetrachloroethene by a stepwise catalysis of different organohalide respiring bacteria and reductive dehalogenases

Christof Holliger, Katia Szynalski, Julien Maillard, Emmanuelle Rohrbach, Pierre Rossi

The enrichment culture SL2 dechlorinating tetrachloroethene (PCE) to ethene with strong trichloroethene (TCE) accumulation prior to cis-1,2-dichloroethene (cis-DCE) formation was analyzed for the presence of organohalide respiring bacteria and reductive de ...

Springer Netherlands2011

Significance of Rhodocyclaceae for the formation of aerobic granular sludge biofilms and nutrient removal from wastewater

Christof Holliger, Samuel Lochmatter, David Gregory Weissbrodt

The competition of two Rhodocyclaceae-affiliated bacterial populations was assessed during the formation and maturation of aerobic granular sludge in two different types of anaerobic-aerobic sequencing batch reactors. Zoogloea spp. (57%) were predominant i ...

Tongji University2011

Physiological adaptation of Desulfitobacterium hafniense strain TCE1 to tetrachloroethene respiration

Christof Holliger, Julien Maillard, Laure Prat

Desulfitobacterium spp. are ubiquitous organisms with a broad metabolic versatility and some isolates have the ability to use tetrachloroethene (PCE) as terminal electron acceptor. In order to identify proteins involved in this organohalide respiration pro ...

American Society for Microbiology2011

Nitrogen removal from digested manure in a simple one-stage process

Christof Holliger

A process based on partial nitrification and recirculation into the anaerobic digester was studied to remove nitrogen from digested manure and thus reduce enhanced gaseous ammonia emissions due to on-farm biogas production. An anaerobic reactor representin ...

IWA Publishing2011

Performance and microbial community composition dynamics of aerobic granular sludge from sequencing batch bubble column reactors operated at 20, 30, and 35°

Christof Holliger, Julien Maillard, Emmanuelle Rohrbach, Sébastien Gabus, Pierre Rossi, Sirous Ebrahimi, Maryam Hosseini

Two bubble column sequencing batch reactors fed with an artificial wastewater were operated at 20, 30 and 35°C. In a first stage, stable granules were obtained at 20°C whereas fluffy structures were observed at 30°C. Molecular analysis revealed high abunda ...

Springer-Verlag2010

Biochemistry of Microbial Degradation of Hexachlorocyclohexane and Prospects for Bioremediation

Christof Holliger, Vishakha Raina

Lindane, the gamma-isomer of hexachlorocyclohexane (HCH), is a potent insecticide. Purified lindane or unpurified mixtures of this and alpha-, beta-, and gamma- isomers of HCH were widely used as commercial insecticides in the last half of the 20th century ...

2010

Buffering soil-water acidity in chlorinated solvent bioremediation schemes

Christof Holliger, David Andrew Barry, Alessandro Brovelli, Clare Robinson, Elsa Marina Lacroix

Chlorinated solvents form a significant part of groundwater contamination worldwide. They are difficult to remove via physical means, and anaerobic source-zone remediation based on provision of fermentable e-donor is an attractive clean-up dechlorination o ...

International Union of Soil Sciences2010

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