bioremediation microbiology Articles

  • In Situ Bioremediation - Technology Overview

    ABSTRACT Bioremediation is a managed or spontaneous process in which microbiological processes are used to degrade or transform contaminants to less toxic or nontoxic forms, thereby mitigating or eliminating environmental contamination. In the presence of sufficient oxygen (aerobic conditions) and nutrients, microorganisms will ultimately convert many organic contaminants to carbon dioxide, ...


  • System for bioremediation of effluents

    Executive Summary The remediation process of commercial, municipal, industrial and agricultural wastewaters has employed combinations of sulfuric acid, caustic, petroleum based solvents and synthetic emulsifiers, which are either toxic or generally non-biodegradable. An alternate method using naturally occurring microorganisms has been utilized for many years to facilitate the remediation ...


    By NCH Corporation

  • Types of bioremediation and their modes of action

    An Urgent Call for Change in U.S. Oil Spill Response With Bioremediation Agent Type EA* bearing out as a workable first response alternative to the use of chemical dispersants, contrasting evidence has become even clearer that dispersant use has been a huge failure. Dispersants have proven to be an inadequate response method with more and more studies showing an ...

  • Full-Scale Bioremediation of Organic Explosive-Contaminated Soil

    Untitled Document In August 2001, the U.S. Army Corps of Engineers (USACE) initiated full-scale bioremediation of 6,000 yd3 of organic explosive-impacted soil at the Iowa ...


  • Bioremediation With The Activated Peat Moss Product In A Savanna Soil Affected By Spilled Petroleum

    The preservation of environment is fundamental in order to get a self sustainable development, by keeping a harmonic relationship between oil exploration and environmental equilibrium. This is a necessary condition in order to share the oil production with other economic activities like agriculture and cattle production. In reality, the oil production is the most important factor in the national ...


    By The ARK Enterprises, Inc.

  • Bioremediation of PCB & Pesticide Contaminated Soils Utilizing Gene Expression Factors

     Abstract Historically soils contaminated by persistent organic compounds such as pesticides and PCBs were not considered good candidates for bioremediation due to the simple fact that the chemical industry designed these compounds to withstand the destructive effects of natural attenuation through weathering and microbial activity. Although the chemical industry has long appreciated the ...


  • Rushing Remediation - Cometabolic bioremediation accelerates natural degradation of groundwater and soil contaminants

    Untitled Document Field studies have shown that many organic contaminants degrade naturally by microorganisms present in soil and groundwater. This naturally occurring bioremediation, known ...


    By CL Solutions, LLC

  • A Tale of Two Sites - Enhanced Bioremediation of Explosives Impacted Soils

    The problem with OE compounds in soil A variety of organic explosive (OE) compounds have been used for military, geological and industrial applications throughout North America, and in most industrialized nations. During their manufacture, formulation and storage, these compounds have migrated to the soil. Compounds such as 2,4,6-trinitrotoluene (TNT), hexahydro-1,3,5-trinitro-1,3,5-triazine ...


  • Enhanced Aerobic Bioremediation of Petroleum UST Releases in Puerto Rico.

    Abstract: Releases of petroleum compounds from underground storage tanks (USTs) containing diesel fuel and gasoline are a serious and increasingly prevalent problem in Puerto Rico. Remediation of groundwater impacted by these releases utilizing common methodologies can be quite costly and require long periods of time to implement. Oxygen is often the limiting factor retarding optimal ...


    By REGENESIS

  • Applied science drives commercial decision-making

    Site remediation has evolved from energy intensive, mechanically driven remediation processes to more effective and less expensive in-situ processes. The most common in-situ remediation technology is bioremediation although knowledge of in-situ chemical treatments has advanced significantly and it is now frequently implemented on contaminated sites. Microorganisms in the ground have the ability ...


    By WSP | Parsons Brinckerhoff

  • 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

  • The advantages and benefits of aerobic cometabolism

    Aerobic metabolism yields the energy-transferring molecule TPA at a much higher rate than anaerobic metabolism. The higher energy yield produces a greater viable population. The oxygenase enzymes involved in the cometabolism of chlorinated solvents are not induced by the presence of contaminants, so a high microbial population has a proportionately high yield of oxygenase enzymes. Aerobic ...


    By CL Solutions, LLC

  • OSEI CEO Mr. Steven Pedigo speaks to the RRT v and VII

    A meeting of Regional Response Team 7 (RRT) member agencies and regional stakeholders convened at 13:00 on April 21, 2015, at 201 North 2nd Street, St. Charles, Missouri (MO). Co-chairs Scott Hayes of the U.S. Environmental Protection Agency (EPA) and Michael Sams of the U.S. Coast Guard (USCG) welcomed participants to the meeting. After attendee self-introductions, Hayes asked if corrections ...

  • Learn why All Zero-Valent Iron (ZVI) Remediation Products are not the same

    The MAJOR DIFFERENCE between Emulsified Zero-Valent Iron (eZVI) and other ZVI products is the physical structure of the eZVI product, which is a water-in-oil emulsion (see below images). This structure makes the eZVI product hydrophobic, and therefore it is fully miscible with source material in situ. The water contained in the interior of the eZVI emulsion provides the hydrogen for abiotic ...


    By Tersus Environmental, LLC

  • Isolation of surfactant-resistant bacteria from natural, surfactant-rich marine habitats

    Environmental remediation efforts often utilize either biodegradative microbes or surfactants, but not in combination. Coupling both strategies holds the potential to dramatically increase the rate and extent of remediation because surfactants can enhance the bioavailability of contaminants to microbes. However, many surfactants permeabilize ...

  • Natural Attenuation in Soils

    Introduction Surface and subsurface soils have different characteristics in natural attenuation. Mobile contaminants in subsurface soils diffuse into soil vapor and aqueous phase and thus are relatively easily subject to natural subsurface processes that can attenuate these contaminants. Most high-molecular-weight (persistent) organic and many inorganic contaminants will be immobilized in the ...

  • Natural Attenuation

    Introduction: Natural subsurface processes such as dilution, volatilization, biodegradation, adsorption, and chemical reactions with subsurface materials are allowed to reduce contaminant concentrations to acceptable levels. Natural attenuation is not a 'technology' per se, and there is significant debate among technical experts about its use at hazardous waste sites. Consideration of this ...

  • Vinyl Chloride Attenuation By Direct Injection of Time-Release Magnesium Peroxide.

    ABSTRACT: This case study shows that there is potential to remediate dissolved vinyl chloride by oxygenation in the field. Residual vinyl chloride concentrations have been remediated in the field at a mid-western site with a phosphate-intercalated peroxygen (ORC®, a proprietary formulation of magnesium peroxide that releases oxygen slowly). The site was formerly operated as an aluminum coating ...


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  • Consideration of the Effects of Remediation Technologies on Natural Attenuation.

    ABSTRACT: We have long understood and continue to improve our understanding of the geochemical conditions that favor biodegradation of petroleum hydrocarbons. Over the last several years our understanding of the conditions that are necessary for and/or promote reductive dechlorination of chlorinated hydrocarbons has improved substantially. Over this time in situ remediation technologies have ...


    By REGENESIS

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