bioremediation site Articles

  • Performance of DNAPL source depletion technologies 2 at 59 Chlorinated solvent-impacted sites

    Abstract Performance and rebound of intensive source depletion technologies were evaluated at 59 chlorinated solvent sites where remediation targeted dense non-aqueous phase liquid (DNAPL) source zones. The four technologies included in the study are chemical oxidation, enhanced bioremediation, thermal treatment, and surfactant/cosolvent flushing. Performance was evaluated by examining ...


    By TRS Group, Inc.

  • Oregon (ODEQ) comparative pilot study

    Comparison of Enhanced Bioremediation to Stimulated Bioremediation In the winter of 2001 the Oregon Department of Environmental Quality (ODEQ) along with the State Coalition for the Remediation of Dry Cleaners organized a field comparison of two methods of bioremediation. The project provided for a side- by- side comparison of enhanced bioremediation using CL-Out and stimulated bioremediation ...


    By CL Solutions, LLC

  • PCE Cometabolism Case Study - Dry Cleaning Site Remediation in Less Than 9 Months

    Dry cleaning solvents were found in the ground water adjacent to a dry cleaning facility located in a commercial shopping center. Most of the mass of ground water contamination had migrated under adjacent businesses, which restricted access for remediation. CL-Out® bioremediation was implemented to reduce the volume of contamination in the source area and indirectly down gradient. CL-Out® is a ...


    By CL Solutions, LLC

  • Enhanced Bioremediation of High Contaminant Concentrations in Source Residual Area (PDF)

    Although enhanced bioremediation has proven to be effective at many sites, typically it has been applied to relatively low contaminant concentrations and in relatively permeable media. The project site described herein is an application that potentially extends the practical limits of in situ bioremediation applications. An active eyewear manufacturing facility located in Western NY was found to ...


    By Regenesis

  • Award-winning bioremediation case study

    Tamdown won ‘Best Use of a Single Remediation Technique’ at the 2008 Brownfield Briefing awards for their treatment of this former gasworks in Surrey. After applying Alga Power 101 during the screening process, Tamdown constructed vented biopiles housed in large poly-tunnels. Air was continually circulated through the piles using a low vacuum extraction system, preventing the need for ...


    By A Alga Companhia Limited

  • Fast bioremediation of a hydrocarbon contaminated site

    The use of bioremediation has been demonstrated to be a very effective treatment technology for a hydrocarbon contaminated site within a month of starting. In addition to selection and preparation of an appropriate microbial inoculum the other key considerations were effective mixing, addition of suitable nutrients and maintenance of soil moisture levels. Careful management of all these ...


    By Biofuture Ltd

  • 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

  • Bioremediation Of Highway Spills On Sites With Shallow Underground Utility Lines

    Highway spills involving saddle tanks of trucks are fairly common and in such cases almost 104 gallons of diesel are released in the environment. Although excavation is a preferred method, bioremediation using AgroRemed is considered another option in many situations like this one in West Virginia where the underlying cables were likely to be damaged. At the end of bioremediation, the values of ...


    By Sarva Bio Remed, LLC

  • Contamination at ANA Shipyard

    ANA Shipyard is located on Elizabeth river and during additional construction work, it was discovered that the ground water was contaminated with free product due to soil contaminated with a mixture of oils and greases. Excavation of soil and replacement with clean dirt was not an option since it would contaminate the river. It was recommended by the Virginia DEQ that the cleanup should be done ...


    By Sarva Bio Remed, LLC

  • Sea Power 101: Award Winning Bioremediation Solution

    Case Study: Gasworks, Chertsey At the 2008 Brownfield Briefing Remediation Innovation Awards, Tamdown won ‘Best Use of a Single Remediation Technique’ for their treatment of a former gasworks in Surrey using Sea Power 101. Applied to vented biopiles housed in large poly tunnels, Tamdown were able to treat and re-use 3,250 tonnes of contaminated soil. ...


    By Sea-Chem Limited

  • Biodegradation of Cypermethrin by pseudomonas in a batch activated sludge process

    The biodegradation of Cypermethrin (20 to 125 mg/L) in an effluent using batch activated sludge was studied. Degradation was found to occur to a great extent only in the presence of Pseudomonas (IES-Ps-1) culture. Under aerobic conditions using mechanical aerators, Cypermethrin (20 mg/L) was almost completely degraded in just over 48 h at ambient temperature. Further loading of organic compound ...

  • The Effects of pH on Enhanced Reductive Dechlorination: Growth vs. Activity

    This past May at the International Symposium on In-Situ and On-Site Bioremediation sponsored by Battelle, I attended a session entitled “Microbial Ecology of Reductive Dechlorination and the pH Impact.” The presentation contained fascinating information about a seemingly well understood parameter, pH. Although a relatively simple parameter, the effect of pH on enhanced reductive dechlorination ...


    By Regenesis

  • Successful Biostimulation Treatment of TCE DNAPL

    The challenges posed by the presence of DNAPL are rooted in the unpredictable manner in which it spreads and moves through the subsurface, and the fraction of total contaminant mass it represents in an associated groundwater plume via sorbed, residual and drainable phases (typically greater than 99 percent). Under natural conditions, the dissolution of DNAPL is very slow, allowing groundwater ...


    By Arcadis

  • In Situ Biological Treatment for Ground Water, Surface Water, and Leachate

    The main advantage of in situ treatment is that it allows ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ treatment, however, generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in aquifer characteristics and because the efficacy of the process is more ...

  • Water repellency in oil contaminated sandy and clayey soils

    Two sites from a humid tropical environment were studied with respect to soil water repellency caused by hydrocarbon contamination. Samples were analyzed for water repellency (molarity ethanol droplet method), total petroleum hydrocarbons, acute toxicity (Microtox) and field capacity. At both sites, water absorption times were ...

  • On Site Bioremediation Of Oily Ballast Waters Of Ships and Tankers

    A poster presentation was made at the International Ballast Water symposium held in London, UK Paper discusses application of bioremediation products for ship board remediation of oily ballast water on ships and tankers and presents some case studies on bioremediation of industrial oily waste. Abstract Discharge of oily wasie ballast waier is a perpetual problem for most types of ...


    By Sarva Bio Remed, LLC

  • In Situ Biological Treatment for Soil, Sediment, and Sludge

    The main advantage of in situ treatment is that it allows soil to be treated without being excavated and transported, resulting in potentially significant cost savings. However, in situ treatment generally requires longer time periods, and there is less certainty about the uniformity of treatment because of the variability in soil and aquifer characteristics and because the efficacy of the ...

  • In-Situ Bioremediation Treats Contaminants at a Disposal Site

    Site Summary A TCE-contaminated plume developed from buried drums containing organic solvents on the former Duluth Airbase. Soil excavation took place in the early 1990s and a total of 1,925 yds3 of soil were treated through land farming. A few years later, site assessment activities uncovered a VOC plume in groundwater and further monitoring revealed the breakdown of TCE to daughter products ...


    By Regenesis

  • Isolation and characterization of crude oil degrading bacillus spp.

    Crude oil continues to be used as the principal source of energy and play an important role in the global environmental pollutant considerations. On the other hand, oil will remain as a major source of energy in the next several decades, because a reliable alternative energy comsumption has not yet been substituted. (Trindade et al., 2005, Al- Saleh and Obuekwe, 2005). There are so many bacterial ...


    By University of Tehran

  • Biofiltration: An Innovative Technology for The Future

    Biofiltration refers to the biological transformation or treatment of contaminants present in the gas phase, usually air. The fact that air contaminants can be biodegraded by active bacteria has been known for quite some time. However, it is only in the last 10 years, that biofiltration has begun to emerge as an economically viable treatment process. Initially, biofiltration involved the use of ...


    By PRD Tech, Inc.

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