Topic
Microbial biodegradation
About: Microbial biodegradation is a research topic. Over the lifetime, 1647 publications have been published within this topic receiving 75473 citations.
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TL;DR: The limitation to microbial degradation of petroleum hydrocarbons in Arctic ecosystems appears to be due to the combination of several factors, including the availability of nitrogen, phosphorus, and oxygen as discussed by the authors.
28 citations
TL;DR: Investigation of intrinsic biodegradation of benzene and ethylbenzene in an aquifer with high levels of aromatic and aliphatic hydrocarbon contamination demonstrated the benefits of combining different isotopic methods and hydrochemical approaches to evaluate the fate of organic pollutants in contaminated aquifers.
28 citations
TL;DR: Although individually self-inhibition and mass-transfer limitations negatively impact biodegradation, their combined effect may enhance biodegrades rates above a concentration threshold, the first theoretical study describing the cumulative effects of the two mechanisms together.
Abstract: Microbial degradation is an important process in many environments controlling for instance the cycling of nutrients or the biodegradation of contaminants. At high substrate concentrations toxic effects may inhibit the degradation process. Bioavailability limitations of a degradable substrate can therefore either improve the overall dynamics of degradation by softening the contaminant toxicity effects to microorganisms, or slow down the biodegradation by reducing the microbial access to the substrate. Many studies on biodegradation kinetics of a self-inhibitive substrate have mainly focused on physiological responses of the bacteria to substrate concentration levels without considering the substrate bioavailability limitations rising from different geophysical and geochemical dynamics at pore-scale. In this regard, the role of bioavailability effects on the kinetics of self-inhibiting substrates is poorly understood. In this study, we theoretically analyze this role and assess the interactions between self-inhibition and mass transfer-limitations using analytical/numerical solutions, and show the findings practical relevance for a simple model scenario. Although individually self-inhibition and mass-transfer limitations negatively impact biodegradation, their combined effect may enhance biodegradation rates above a concentration threshold. To our knowledge, this is the first theoretical study describing the cumulative effects of the two mechanisms together.
28 citations
TL;DR: A bacterial strain, YM-6, which has a high ability to utilize phenanthrene (PHE) as its sole source of carbon and energy, was isolated from sediment contaminated with PAHs and it was found to degrade 96.3% of 100 mg/L of PHE in liquid cultures within 52 h.
27 citations
Book•
09 Jun 2000
TL;DR: Bioremediation techniques and methods used to study biodegradability additives affecting the microbial degradation of petroleum hydrocarbons intrinsic biodegradation of benzene in contaminated groundwater are illustrated.
Abstract: Bioremediation techniques: towards an ecosystem approach to remediation in the Great Basin experimental investigations on in-situ bioremediation of an aquifer contaminated with ammonium remediation of hexavalent chromium by biosorption bioregeneration of contaminated absorbents containing hazardous wastes efficiency of cyperus corymbosus, typha angustifolia, phragmites, australis, and eleocharis dulcis in constructed wetlands for chromium treatment of electroplating industrial wastewater microbiological peculiarities of cattle waste transformation into food additions the increase of pea cells sensitivity to chemical compounds during chromatin activation periods modification of biological process of treatment - real way to improve effluent. Bioremediation of hydrocarbon contaminated materials: biodegradation of PCBs in aqueous and soil systems biosurfactant production by indigenous soil microbes degrading BEPH and lubricating oil potential of plant-microbial interactions for in-situ bioremediation of hydrocarbon-contaminated soils concurrent fuel and chlorinated solvent remediation -bioslurping free product and monitored natural attenuation of the soluble plume biodegradation of crude oil in cold climate conditions - summary of the methods used to study biodegradability additives affecting the microbial degradation of petroleum hydrocarbons intrinsic biodegradation of benzene in contaminated groundwater - a case study illustrating the application of numerical modelling. Soil-specific bioremediation techniques: bioaugmentation for soil bioremediation degradation of aromatic xenobiotics in soil by enzyme systems of microorganisms and plants removal of heavy oil sludge contamination by composing bioremediation of TNT-contaminated soil in-situ remediation of contaminated soils by bioelectrokinetic remediation and other competitive technologies aerobic biodegradation kinetics and soil gas transport in the unsaturated zone. (Part contents).
27 citations