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Christof Holliger

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Publications associées (95)

Organic substrate diffusibility governs microbial community composition, nutrient removal performance and kinetics of granulation of aerobic granular sludge

Christof Holliger, Eva Reynaert

Basic understanding of formation of aerobic granular sludge (AGS) has mainly been derived from labscale systems with simple influents containing only highly diffusible volatile fatty acids (VFA) as organic substrate. This study compares start-up of AGS sys ...

2019

Editorial: Special issue on anaerobic biological dehalogenation

Christof Holliger

2018

Strain-level diversity drives alternative community types in millimetre-scale granular biofilms

Christof Holliger

Microbial communities are often highly diverse in their composition, both at a coarse-grained taxonomic level, such as genus, and at a highly resolved level, such as strains, within species. This variability can be driven by either extrinsic factors such a ...

NATURE PUBLISHING GROUP2018

Coexistence of two distinct Sulfurospirillum populations respiring tetrachloroethene—genomic and kinetic considerations

Christof Holliger, Julien Maillard, Géraldine Florence Buttet, Mélissa Burion, Alexandra Marie Murray

Two anaerobic bacterial consortia, each harboring a distinct Sulfurospirillum population, were derived from a 10 year old consortium, SL2, previously characterized for the stepwise dechlorination of tetrachloroethene (PCE) to cis-dichloroethene (cis-DCE) v ...

FEMS Microbiology Ecology, Vol. 94, Issue 12018

Coexistence of two distinct Sulfurospirillum populations respiring tetrachloroethene-genomic and kinetic considerations

Christof Holliger, Julien Maillard, Géraldine Florence Buttet, Mélissa Burion, Alexandra Marie Murray

2018

Methane Production of Full-Scale Anaerobic Digestion Plants Calculated from Substrate's Biomethane Potentials Compares Well with the One Measured On-Site

Christof Holliger, Gabrielle Hack

Biomethane potential (BMP) tests are used to determine the amount of methane that can be produced from organic materials in order to design different components of full-scale anaerobic digestion (AD) plants such as size of the digesters and units exploitin ...

Frontiers Media Sa2017

Extraction of carotenoids from Chlorella vulgaris using green solvents and syngas production from residual biomass

Jean-Paul Schwitzguebel, Christof Holliger, Christian Ludwig, Shivom Sharma, Dominik Refardt

A combined process for carotenoids extraction and efficient bioenergy recovery from the wet microalgae biomass is proposed. High added-value products could thus be extracted prior a hydrothermal gasification of the algal biomass into synthetic natural gas. ...

2017

Modeling Hydraulic Transport and Anaerobic Uptake by PAOs and GAOs During Wastewater Feeding in EBPR Granular Sludge Reactors

Christof Holliger, David Gregory Weissbrodt

New-generation bioprocesses using granular sludge aim for a high-rate removal of nutrients from wastewater with low footprint. Achieving enhanced biological phosphorus removal (EBPR) relies on the design of sludge beds and wastewater feeding conditions to ...

Wiley-Blackwell2017

Towards a standardization of biomethane potential tests

Christof Holliger, Gabrielle Hack, Jing Liu

Production of biogas from different organic materials is a most interesting source of renewable energy. The biomethane potential (BMP) of these materials has to be determined to get insight in design parameters for anaerobic digesters. Although several nor ...

IWA Publishing2016

Evolution of microbial communities and nutrient removal performances in aerobic granular sludge sequencing batch reactor during change of substrate

Aline Sondra Adler, Christof Holliger, Julien Maillard, Valérie Berclaz, Marie Christelle Horisberger

• Aerobic granular sludge (AGS) is a promising alternative wastewater treatment to the conventional activated sludge system. As AGS has enhanced settling abilities and provides different redox conditions across the granules at the same time, the processes ...

2016

Validation of an integrative methodology to assess and monitor reductive dechlorination of chlorinated ethenes in contaminated aquifers

Christof Holliger, Pierre Rossi, Sonia Estelle Tarnawski

Bioremediation of tetra-and trichloroethene-contaminated aquifers is requently hampered due to incomplete dechlorination to the more toxic dichloroethene (DCE) and vinyl chloride (VC), indicating insufficient knowledge about the biological mechanisms relat ...

2016

Indirect Evidence Link PCB Dehalogenation with Geobacteraceae in Anaerobic Sediment-Free Microcosms

Luiz Felippe De Alencastro, Christof Holliger, Pierre Rossi, Martina Praveckova

Although polychlorinated biphenyls (PCBs) production was brought to a halt 30 years ago, recalcitrance to degradation makes them a major environmental pollutant at a global scale. Previous studies confirmed that organohalide-respiring bacteria (OHRB) were ...

Frontiers Media SA2016

Role of ammonia-oxidizing bacteria in micropollutant removal from wastewater with aerobic granular sludge

Christof Holliger, Samuel Lochmatter, Jonas Margot, David Andrew Barry

Nitrifying wastewater treatment plants (WWTPs) are more efficient than non-nitrifying WWTPs to remove several micropollutants such as pharmaceuticals and pesticides. This may be related to the activity of nitrifying organisms, such as ammonia-oxidizing bac ...

IWA Publishing2016

Phage-dependent variability of Candidatus ‘Accumulibacter phosphatis’ populations in aerobic granular sludge

Aline Sondra Adler, Christof Holliger, Julien Maillard, Jacques Rougemont

During the past 20 years, aerobic granular sludge (AGS) has been extensively studied with the aim to develop an attractive alternative to conventional activated sludge for wastewater treatment. The phosphate-accumulating organism (PAO) Candidatus ‘Accumuli ...

2015

Harvesting of Chlorella sorokiniana by co-culture with the filamentous fungus Isaria fumosorosea: A potential sustainable feedstock for hydrothermal gasification

Jean-Paul Schwitzguebel, Christof Holliger, Eduardo Pereira Gomes, Stephen Mackay

Despite recent advances in down-stream processing, production of microalgae remains substantially limited because of economical reasons. Harvesting and dewatering are the most energy-intensive processing steps in their production and contribute 20–30% of t ...

Elsevier2015

Sulfamethoxazole and isoproturon degradation and detoxification by a laccase-mediator system: Influence of treatment conditions and mechanistic aspects

Christof Holliger, Pierre-Jean Copin, Jonas Margot, David Andrew Barry, Urs von Gunten

The potential of laccase-mediator systems (LMS) for the removal and detoxification of two wastewater micropollutants, the antibiotic sulfamethoxazole (SMX) and the herbicide isoproturon (IPN), was assessed. The influence of various parameters on micropollu ...

Elsevier2015

Functional genomics of corrinoid starvation in the organohalide-respiring bacterium Dehalobacter restrictus strain PER-K23

Christof Holliger, Julien Maillard, Hauke Smidt, Yue Lu, Aamani Rupakula Boyanapalli

De novo comnoid biosynthesis represents one of the most complicated metabolic pathways in nature. Organohalide-respiring bacteria (OHRB) have developed different strategies to deal with their need of corrinoid, as it is an essential cofactor of reductive d ...

Frontiers Media SA2015

A review of the fate of micropollutants in wastewater treatment plants

Luca Rossi, Christof Holliger, Jonas Margot, David Andrew Barry

Municipal wastewaters are contaminated by a wide range of chemicals, from surfactants to heavy metals, including pharmaceutical residues, personal care products, various household chemicals, and biocides/pesticides. Their release into the environment, wher ...

Wiley-Blackwell2015

Divergent PCB organohalide-respiring consortia enriched from the efflux channel of a former Delor manufacturer in Eastern Europe

Luiz Felippe De Alencastro, Christof Holliger, Pierre Rossi, Martina Praveckova

Polychlorinated biphenyl (PCB) organohalide-respiring communities from the efflux channel of a former Delor manufacturer in Eastern Slovakia were assessed using metagenomic, statistical and cultivation-adapted approaches. Multivariate analysis of environme ...

Elsevier2015

Temporal evolution of bacterial communities associated with the in situ wetland-based remediation of a marine shore porphyry copper tailings deposit

Christof Holliger, Emmanuelle Rohrbach, Nouhou Diaby, Pierre Rossi

Mine tailings are a serious threat to the environment and public health. Remediation of these residues can be carried out effectively by the activation of specific microbial processes. This article presents detailed information about temporal changes in ba ...

Elsevier2015

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