aerobic biodegradation Articles

  • Microbial degradation of phenols: a review

    The microbial degradation of phenols has been reviewed including the phenol-degrading microbes, factors affecting degradability, and the use of biotechnology with emphasis on degradation mechanisms and their kinetics. The mechanism of microbial degradation depends on aerobic and anaerobic conditions. Under aerobic conditions, degradation of phenol was shown to be initiated by oxygenation into ...


    By Inderscience Publishers

  • Estimation of the energetic parameters associated with the continuous aerobic biodegradation of phenol by monoculture of Pseudomonas aeruginosa and Pseudomonas fluorescence

    The objective of this study was to estimate and analyse the growth parameters of indigenous monoculture of Pseudomonas aeruginosa and Pseudomonas fluorescence on phenol in an aerobic chemostat culture. The biodegradation data were checked for consistency using carbon and available electron balances and growth parameters were estimated using two forms of growth models: reparameterised Pirt's model ...


    By Inderscience Publishers

  • BTEX, TPH, and MTBE Remediation at a Former Service Station

    Site Summary A former service station site was contaminated with TPH including MTBE and BTEX compounds. In California, MTBE sites are ranked in terms of threat to drinking water and this site was designated as a “Class A,” – or a site with the highest priority. Concentrations in the initial MTBE plume ranged from 17,000 ppb to 540 ppb, while initial BTEX concentrations ranged from 46,600 ppb to ...


    By Regenesis

  • Aerobic biodegradation of hexachlorobenzene by an acclimated microbial community

    The aerobic degradation of hexachlorobenzene (HCB) by an acclimated microbial community which isolated from a contaminated site and acclimated in our laboratory was investigated. The enriched microbial community was capable of biodegrading HCB when cultivated in minimal salts medium and supplied HCB as the sole carbon source. The efficiencies of microbial community in the degradation of HCB under ...


    By Inderscience Publishers

  • Bioremediation of 1,2-dichloroethane with INTEROX® case study

    At a chemica plant in a harbour area, the surface aquifer was contaminated with 1,2-dichoroethane (1,2-DCEa) which had to be remediated. Site characterisation, and laboratory tests demonstrated that oxygen was the limiting factor for the insitu biodegradation of 1,2-DCEa. The remedial strategy was based on flushing with simuftaneous aerobic biodegradation enhancement. Biodegradation was stimuated ...


    By Solvay

  • Size-dependent microbial substrate uptake kinetics for aerobic granules

    Biodegradation kinetics of aerobic granules determined by indirect method of resporimetric technique showed that it followed Monod kinetics, and the kinetic behaviour was size-dependent. It was further demonstrated that biodegradation kinetics was a surface reaction associated phenomenon. It shows that the affinity coefficient of biomass to substrate in terms of ...


    By Inderscience Publishers

  • Combination of hydrodechlorination and biodegradation for the abatement of chlorophenols

    A method for abatement for chlorophenols (CPs) in contaminated water based on successive steps of catalytic hydrodechlorination (HDC) over Pd/C at ambient temperature and pressure, followed by aerobic biodegradation using yeast Candida tropicalis (C. tropicalis) was studied. The results showed that 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) could be easily and ...


    By IWA Publishing

  • Enhanced Bio-Stimulation through Horizontal Wells

    Biosparging technology can be further enhanced when applied through Horizontal Remediation Wells. Since horizontal well systems typically have 4 to 10 times more screen footage in contact with the contaminated media than vertical systems, Horizontal Biosparge Wells can inject much greater volumes while maintaining the same low flow rates. This, in turn, leads to more rapid increases in dissolved ...

  • Sensitivity analysis on parameters and processes affecting vapor intrusion risk

    A one‐dimensional numerical model was developed and used to identify the key processes controlling vapor intrusion risks by means of a sensitivity analysis. The model simulates the fate of a dissolved volatile organic compound present below the ventilated crawl space of a house. In contrast to the vast majority of previous studies, this model accounts for vertical variation of soil water ...


    By John Wiley & Sons, Ltd.

  • Bioremediation of chlorinated phenols with INTEROX® case study

    The mass balance enabed the evaluation of the individual contribution of the flushing and the biodegradation processes to the global remediation. Initially, flushing was the main process of remediation. After the deveopment of in situ conditions favorab e for the aerobic biodegradation, the main process of contamination remova is bioremediation contributing for 71% to the global contaminant ...


    By Solvay

  • Cellular automata-based modelling and simulation of biofilm structure on multi-core computers

    The article presents a mathematical model of biofilm growth for aerobic biodegradation of a toxic carbonaceous substrate. Modelling of biofilm growth has fundamental significance in numerous processes of biotechnology and mathematical modelling of bioreactors. The process following double-substrate kinetics with substrate inhibition proceeding in a biofilm has not been modelled so far by means ...


    By IWA Publishing

  • Aerobic biodegradation potential of endocrine disrupting chemicals in surface‐water sediment at Rocky Mountains National Park, USA

    Endocrine disrupting chemicals (EDC) in surface water and bed sediment threaten the structure and function of aquatic ecosystems. In natural, remote, and protected surface‐water environments where contaminant releases are sporadic, contaminant biodegradation is a fundamental driver of exposure concentration, timing, duration, and, thus, EDC ecological risk. Anthropogenic contaminants, ...


    By John Wiley & Sons, Ltd.

  • Leachate dissolved organic matter characterization using spectroscopic methods

    This study investigated the use of ultraviolet (UV) and fluorescence spectroscopy to monitor the changes in biodegradability of dissolved organic matter (DOM) in landfill leachates. Experiments to investigate aerobic biodegradation of leachate DOM were carried out using untreated and treated leachate samples collected from two UK municipal solid waste landfills, L1 and L2. Leachate samples ...


    By IWA Publishing

  • A coupled simulation and fuzzy-rule-based method for assessing health risks at a petroleum-contaminated site

    Risk assessment of contaminated sites is crucial for evaluating adverse health impacts on local communities, and provides effective decision support for site-remediation practices. In this study, a coupled simulation and fuzzy-rule-based method was proposed for health risk assessment of groundwater contamination, and applied to a petroleum contaminated site. Benzene concentrations under two ...


    By Inderscience Publishers

  • Robustness of an aerobic metabolically vinyl chloride degrading bacterial enrichment culture

    Degradation of the lower chlorinated ethenes is crucial to the application of natural attenuation or in situ bioremediation on chlorinated ethene contaminated sites. Recently, within mixtures of several chloroethenes as they can occur in contaminated groundwater inhibiting effects on aerobic chloroethene degradation have been shown. The current study demonstrated that metabolic vinyl chloride ...


    By IWA Publishing

  • Pilot-scale study of powdered activated carbon recirculation for micropollutant removal

    Adsorption onto powdered activated carbon (PAC) is a promising technique for the removal of organic micropollutants (OMPs) from treated wastewater. To enhance the adsorption efficiency, PAC is recycled back into the adsorption stage. This technique was examined in pilot scale in comparison to a reference without recirculation. Coagulation with Fe3+ was carried out simultaneously to adsorption. ...


    By IWA Publishing

  • Impact of copper and cadmium on aerobic and anaerobic digestibility of sonicated sludge

    The effects of the introduction of a sludge reduction process such as ultrasound on batch aerobic and anaerobic biodegradability after exposition to two metals (copper and cadmium) were investigated. The specific energy of ultrasonic treatment applied to the sludge was 200,000 kJ kg TS-1. Ultrasonic treatment led to floc size reduction and to organic matter solubilization. Low copper ( ...


    By IWA Publishing

  • Kinetic evaluation for aerobic biodegradation of resorcinol in a batch reactor

    Mixed microbial cultures contained in the sludge of effluent treatment plant of a coke oven industry have been studied for its resorcinol biodegradation capacity under aerobic environment. The result showed that, after necessary acclimatisation, the culture was able to biodegrade up to a concentration of 500 mg/L of resorcinol in the substrate. The specific growth rate of microorganisms was found ...


    By Inderscience Publishers

  • Use of biocatalysts to reduce hydrogen sulfide emissions from lagoons and landfills

    Emission of odors from ponds and lagoons occurs due to aerobic and anaerobic decomposition of organic solids to release hydrogen sulfide, ammonia, and other organic by-products.  Aerobic biodegradation occurs near the water-air interface, where diffusion of oxygen occurs, while anaerobic degradation prevails mainly near the bottom of the pond or lagoon, where there is low or no dissolved oxygen ...


    By PRD Tech, Inc.

  • Surgical Site Closure: Integrating Natural Attenuation and Focused Source Treatment (PDF)

    “Surgical site closure” is an innovative remedial strategy designed to intelligently integrate natural attenuation, risk-based cleanup goals, and focused source removal/treatment to cost-effectively remediate hydrocarbon-impacted sites. The first step in a surgical site closure is to develop a thorough understanding of site-specific groundwater geochemistry, via an evaluation of the presence and ...


    By Regenesis

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