microbial biodegradation Articles

  • 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

  • Biodegradable polyethylene

    It is universally recognised that polyethylene (PE) is bio-inert. Indeed, conventional LDPE is used as a standard for bio-inertness in biodegradability/compostability test methods. It is not biodegradable because it is hydrophobic and because it consists of molecules having a high molar mass. Nevertheless it is a marvellous source of energy consisting entirely of the elements carbon and hydrogen ...


    By ORBIT e.V.

  • The physical, chemical and microbial characteristics of biodegradable municipal waste derived composts

    A comparative study of the physical, chemical and microbial properties of 12 composts sourced from United Kingdom commercial composting plants was carried out. The aim was to ascertain whether these composts could be used as growing media or for application to agricultural land. The composts were produced from either source segregated biodegradable municipal waste (BMW) or mixed municipal solid ...


    By BioCycle Magazine

  • Biodegradation of plasticiser di-n-butyl phthalate by immobilised microbial cells

    Microorganisms capable of degrading Di-n-Butyl Phthalate (DBP) were isolated by acclimation and enrichment techniques. The adaptation of microorganisms to DBP was investigated. The microbial cells were immobilised onto the ceramic honeycomb supports. The DBP degradation was performed in a novel kind of bioreactor using ceramic honeycomb support as carrier for microbial immobilisation. The ...


    By Inderscience Publishers

  • Intrinsic Biodegradation Kinetics Of Chemicals

    Intrinsic Biodegradation Kinetics Of Chemicals An understanding of the rate of biodegradation kinetics for specific industrial chemicals is useful when evaluating their treatability or their impact on treatment processes. The objective of kinetic assessments usually is to model the biodegradation reactions for specific chemicals using either pure cultures or defined ...


    By Challenge Technology

  • 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

  • Evaluation of microbial systems for biotreatment of cassava mill waste water in Nigeria: biodegradation of cyanide

    The capability of six isolated bacterial strains to utilise cyanide in cassava mill wastewater as a nitrogen source in a batch bioreactor was examined and evaluated. The results revealed that all the isolates were capable of degrading cyanide with percent degradation between 60 and 94% in 96 h. There was high positive correlation between cyanide biodegradation and microbial growth (0.90 ≤ R² ≤ ...


    By Inderscience Publishers

  • Environmental biodegradability of [14C]SWNT by Trametes versicolor and natural microbial cultures found in New Bedford Harbor sediment and aerated wastewater treatment plant sludge

    Little is known about environmental biodegradability or biotransformations of single‐walled carbon nanotubes (SWNT). Because of their strong association with aquatic organic matter, detailed knowledge of the ultimate fate and persistence of SWNT requires investigation of possible biotransformations (i.e., biodegradation) in environmental media. In the present study, [14C]SWNT were utilized to ...


    By John Wiley & Sons, Ltd.

  • 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

  • Oxygen and temperature kinetics of aerobic solid-state Biodegradation

    Rates of decomposition are of critical interest to operators of most biodegradation processes, since they determine the length of time the process must continue to achieve a particular extent of decomposition. While the goals of the decomposition process vary widely, ranging from reduction of odors or contaminants to production of high valueadded products, most of these goals are impacted by the ...


    By ORBIT e.V.

  • Biodegradation of palmarosa oil (green oil) by Serratia marcescens

    Biodegradation of oil depends on the nature of the oil, the type of microbial community and a variety of environmental factors. Green oils are being used as consumer goods and as raw materials in industries such as food processing, pharmaceutical and cosmetic. Microbial contaminations of green oils have been the cause of degradation problems. Serratia Marcessens produced cytochrome oxidase, ...

  • Cyanide removal by combined adsorption and biodegradation process

    Cyanide is present in environmental matrices and waste streams as simple and complex cyanides, cyanates and nitriles (Ebbs, 2004). Cyanide compounds are extensively used in industry and their effluents are the major source of these toxic pollutants in our environment (Desai and Ramakrishna, 1998). The release of cyanide from industries worldwide has been estimated to be more than 14 million kg/yr ...


    By University of Tehran

  • Green labels: The walk behind the talk - `Biodegradable`

    The word “biodegradable” is probably one of the easiest green labels to understand, so one may assume it is also the least likely to be subject to false claims. However, the term is still interpreted very loosely and frequently used on products that are toxic, that break down into harmful environmental contaminants, or that can take many decades, even centuries, to decompose. On top ...


    By green24

  • Direct Hydrogen Addition for the In-situ Biodegradation of Chlorinated Solvents

    As a result of their widespread use as solvents, degreasers, and dry cleaning agents, chlorinated aliphatic hydrocarbons (PCE, TCE, DCE, etc.) represent one of the most common and most persistent groups of contaminants found in groundwater. Characteristically, these compounds exist in the form of DNAPLs in the subsurface making efforts at remediation particularly difficult. In-situ bioremediation ...


  • Direct Hydrogen Addition for the In-situ Biodegradation of Chlorinated Solvents

    AbstractAs a result of their widespread use as solvents, degreasers, and dry cleaning agents, chlorinated aliphatic hydrocarbons (PCE, TCE, DCE, etc.) represent one of the most common and most persistent groups of contaminants found in groundwater. Characteristically, these compounds exist in the form of DNAPLs in the subsurface making efforts ...


  • Toxicity assessment and biodegradation potential of water-soluble sludge containing 2,4,6-trinitrotoluene

    The water-soluble phase of trinitrotoluene-containing sludge (SLP) was characterized with regard to trinitrotoluene (TNT) concentration, ecotoxicity, and a model biodegradation experiment as evaluation criteria for further development of appropriate treatment technologies. SLP contained 67.8 mg TNT/l. The results of germination and root-elongation tests indicated that SLP had a species-specific ...


    By IWA Publishing

  • Organic matter biodegradation and metal behaviour in contaminated freshwater sediments

    Purpose. The interaction of biodegradable organic matter with metals was studied in sediments of a highly contaminated river of Mexico. Design/methodology/approach. A six fraction speciation procedure was performed on surface sediments, before and after two weeks of microbial activity, to determine metal-sediment association modifications. Findings. Associations of Cd, Cu and Pb evolved toward ...


    By Inderscience Publishers

  • Fate of intermediate biodegradation products of triethyl amine in a compost-based biofiltration system

    Biofiltration of Triethylamine (TEA) vapor used as a catalyst in casting operations was evaluated in this study. The unit consisted of a 6-L three-stage biofilter containing a mixture of compost and wood chips (40:60 v/v) as the filter medium. Seed microbial population from municipal activated sludge was acclimated for a period of three weeks prior to the actual experimental ...


    By University of Tehran

  • 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

  • Hydrodynamics and batch biodegradation of phenol in an Internal Loop Airlift Reactor

    Determination of Residence Time Distribution (RTD), oxygen volumetric mass transfer coefficient (kLa) and mixing pattern in an Internal Loop Airlift Reactor (ILALR) for both living and nonliving systems have been investigated in this paper. Optimal operating condition is found at a gas flow rate of 2 l min−1. The estimated kLa values for nonliving and living system at 27°C are 0.004 ...


    By Inderscience Publishers

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you