Listar GI-BIOENGIN- Artigos por autor "Kennes, Christian"
Mostrando ítems 41-60 de 97
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Effect of salinity on C1-gas fermentation by "Clostridium carboxidivorans" producing acids and alcohols
Fernández Naveira, Ánxela; Veiga, María Carmen; Kennes, Christian (Springer Nature, 2019-07-17)[Abstract] Clostridium carboxidivorans can produce acids and/or alcohols through syngas fermentation. In that C1-gas fermentation process, the production of acids takes place at higher pH (acetogenesis) (e.g., around 6.00), ... -
Effects of pH, CO2, and flow pattern on the autotrophic degradation of hydrogen sulfide in a biotrickling filter
Jin, Yaomin; Veiga, María Carmen; Kennes, Christian (Wiley-Blackwell, 2005-11)In this study, the effects of pH, CO2, and flow pattern on the performance of a biotrickling filter (BTF) packed with plastic Pall rings and treating a H2S-polluted waste gas were investigated to establish the optimum ... -
Efficient Production of 𝑛-Caproate From Syngas by a Co-culture of Clostridium Aceticum and Clostridium Kluyveri
Fernández Blanco, Carla; Veiga, María Carmen; Kennes, Christian (Elsevier, 2021-10-25)[Abstract] In recent years, the possibility of merging technologies for waste recovery such as those based on syngas fermentation and chain elongation has been studied for the production of medium chain fatty acids (MCFAs) ... -
Engineering Acetobacterium woodii for the Production of Isopropanol and Acetone From Carbon Dioxide and Hydrogen
Arslan, Kübra; Schoch, Teresa; Höfele, Franziska; Herrschaft, Sabrina; Oberlies, Catarina; Bengelsdorf, Frank; Veiga, María Carmen; Dürre, Peter; Kennes, Christian (Wiley, 2022-01-25)[Abstract] The capability of four genetically modified Acetobacterium woodii strains for improved production of acetone from CO2 and hydrogen was tested. The acetone biosynthesis pathway was constructed by combining genes ... -
Enhanced solventogenesis in syngas bioconversion: Role of process parameters and thermodynamics
Kennes, Christian; He, Yaxue; Lens, Piet N. L. (Elsevier, 2022)[Abstract] Biofuels, such as ethanol and butanol, obtained from carbon monoxide-rich gas or syngas bioconversion (solventogenesis) are an attractive alternative to traditional fermentation processes with merits of no ... -
Ethanol and Acetic Acid Production from Carbon Monoxide in a Clostridium Strain in Batch and Continuous Gas-Fed Bioreactors
Nalakath Abubackar, Haris; Veiga, María Carmen; Kennes, Christian (Multidisciplinary Digital Publishing Institute, 2015)The effect of different sources of nitrogen as well as their concentrations on the bioconversion of carbon monoxide to metabolic products such as acetic acid and ethanol by Clostridium autoethanogenum was studied. In a ... -
Evaluation of the biomethane potential of solid fish waste
Eiroa, M.; Costa, J.C.; Alves, M.M.; Kennes, Christian; Veiga, María Carmen (Elsevier, 2012-07)Manufacturing processes in fish canning industries generate a considerable amount of solid waste that can be digested anaerobically. The aim of this research was to study the biochemical methane potential of different solid ... -
Experimental and neural model analysis of styrene removal from polluted air in a biofilter
Rene, Eldon R.; Veiga, María Carmen; Kennes, Christian (Wiley-Blackwell, 2009-07)BACKGROUND: Biofilters are efficient systems for treating malodorous emissions. The mechanism involved during pollutant transfer and subsequent biotransformation within a biofilm is a complex process. The use of artificial ... -
Exploiting Cheese Whey for Efficient Selection of Polyhydroxyalkanoates-Storing Bacteria
Kennes, Christian; Veiga, María Carmen; Lagoa Costa, Borja (MDPI, 2023)[Abstract] Agroindustrial by-products hold an enormous potential to be bioconverted into high-value-added products such as polyhydroxyalkanoates (PHA), a cost-effective alternative to conventional plastics. In this study, ... -
Factors Affecting the Optimisation and Scale-up of Lipid Accumulation in Oleaginous Yeasts for Sustainable Biofuels Production
Robles-Iglesias, Raul; Naveira-Pazos, Cecilia; Fernández Blanco, Carla; Veiga, María Carmen; Kennes, Christian (Elsevier, 2022-11-12)[Abstract] The recent unprecedented increase in energy demand has led to a growing interest in emerging alternatives such as the production of microbial lipids with high energy density and environmentally-friendly ... -
Formaldehyde and urea removal in a denitrifying granular sludge blanket reactor
Eiroa, M.; Kennes, Christian; Veiga, María Carmen (Elsevier, 2004-09)Simultaneous formaldehyde biodegradation, urea hydrolysis and denitrification in anoxic batch assays and in a continuous laboratory anoxic reactor were investigated. In batch assays, the initial formaldehyde biodegradation ... -
Formaldehyde biodegradation and its effect on the denitrification process
Eiroa, Marta; Vilar, Almudena; Kennes, Christian; Veiga, María Carmen (Taylor & Francis, 2007)Simultaneous formaldehyde biodegradation and denitrification in batch assays and in a continuous lab-scale reactor were studied. In batch assays, initial biodegradation rates between 0.7 and 3.3 g CH2O g VSS-1 d-1 were ... -
Formaldehyde biodegradation and its inhibitory effect on nitrification
Eiroa, Marta; Kennes, Christian; Veiga, María Carmen (Wiley-Blackwell, 2004-05)The simultaneous removal of formaldehyde and ammonium in aerobic cultures and the inhibitory effect of formaldehyde on ammonium oxidation were investigated. The influence of a co-substrate, methanol, on formaldehyde ... -
Formaldehyde biodegradation in the presence of methanol under denitrifying conditions
Eiroa, Marta; Vilar, Almudena; Kennes, Christian; Veiga, María Carmen (Wiley-Blackwell, 2006)Simultaneous formaldehyde and methanol biodegradation and also denitrification were studied in batch assays and in a continuous laboratory-scale reactor. In batch assays, high formaldehyde concentrations (up to 1360 mg ... -
Fungal biocatalysts in the biofiltration of VOC-polluted air
Kennes, Christian; Veiga, María Carmen (Elsevier, 2004-09-30)Gas-phase biofilters used for the treatment of waste gases were originally packed with compost or other natural filter beds containing indigenous microorganisms. Over the past decade much effort has been made to develop ... -
Fungal biofiltration of α-pinene: Effects of temperature, relative humidity, and transient loads
Jin, Yaomin; Guo, Ling; Kennes, Christian; Veiga, María Carmen (Wiley-Blackwell, 2007-02)Over the past decade much effort has been made to develop new carrier materials, more performant biocatalysts, and new types of bioreactors for waste gas treatment. In biofilters fungal biocatalysts are more resistant to ... -
Hydrodynamic behaviour and comparison of technologies for the removal of excess biomass in gas-phase biofilters
Mendoza, J.A.; Prado Rubianes, Óscar Jesús; Veiga, María Carmen; Kennes, Christian (Elsevier, 2004)The hydrodynamic behaviour of a biofilter fed toluene and packed with an inert carrier was evaluated on start-up and after long-term operation, using both methane and styrene as tracers in Residence Time Distribution ... -
Inert filter media for the biofiltration of waste gases – characteristics and biomass control
Kennes, Christian; Veiga, María Carmen (Springer, 2002)Soil biofilters and related systems based onthe use of natural filter beds have been usedfor several years for solving specific airpollution problems. Over the past decade,significant improvements have been brought tothese ... -
Influence of Electron Acceptors on Hexanoic Acid Production by Clostridium Kluyveri
San-Valero, Pau; Fernández-Naveira, Ánxela; Veiga, María Carmen; Kennes, Christian (Elsevier, 2019-05-07)[Abstract] Clostridium kluyveri was used for chain elongation of C2C4 fatty acids in stirred tank bioreactors. The influence of different electron acceptors (acetic acid, butyric acid and the mixture of both) on C6 fatty ... -
Influence of feedstock mix ratio on microbial dynamics during acidogenic fermentation for polyhydroxyalkanoates production
Lagoa Costa, Borja; Kennes, Christian; Veiga, María Carmen (Elsevier, 2021-12-01)[Abstract] The nature of microbial populations plays an essential role in the production of volatile fatty acids (VFA) during acidogenesis, the first stage in polyhydroxyalkanoates (PHA) production using mixed cultures. ...