bioremediation enhancer Articles

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 ...

Oct. 8, 2009

By CL Solutions, LLC

Dr. Leo Lehmicke, a nationally recognized microbiologist in the area of bioremediation, has joined Hargis + Associates, Inc. His specific area of expertise is natural attenuation and enhanced bioremediation of chlorinated solvents. He helped develop and was an instructor for a course on Natural Attenuation of Chlorinated Solvents that was given to EPA and State regulators around the country. Dr. ...

Apr. 13, 2010

By Hargis + Associates Inc

Biodegradation of poorly soluble polycyclic aromatic hydrocarbons (PAHs) has been a challenge in bioremediation. In recent years, surfactant-enhanced bioremediation of PAH contaminants has attracted great attention in research. In this study, biodegradation of phenanthrene as a model PAHs solubilized in saline micellar solutions of a biodegradable commercial alcohol ethoxylate nonionic surfactant ...

Jan. 31, 2005

By Springer

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 ...

Dec. 31, 2000

By Regenesis

Introduction Enhanced bioremediation is a process in which indigenous or inoculated micro-organisms (e.g., fungi, bacteria, and other microbes) degrade (metabolize) organic contaminants found in soil and/or ground water, converting them to innocuous end products. Nutrients, oxygen, or other amendments may be used to enhance bioremediation and contaminant desorption from subsurface materials. ...

Dec. 31, 1996

By Federal Remediation Technologies Roundtable

Hydrogen Release Compound (HRC) is a food grade, polylactate ester that, upon being deposited into the aquifer, is slowly hydrolyzed to release lactic acid and other organic acid derivatives. The organic acids are fermented to hydrogen, which in turn donates electrons that drive reductive bioattenuation processes. HRC delivers electrons in a time-release fashion for about one year. The ...

Dec. 31, 2000

By Regenesis

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 ...

Oct. 30, 2014

By TRS Group, Inc.

Ivey International Inc. (Ivey) was retained to apply the SEB (Surfactant just prior to the on-set of colder northern weather in an area know for -20oC to Enhanced Bioremediation) technology to remediate 2000 tons of F2, F3, and -40oC winter temperatures. The actual period for effective bioremediation in F4 fine grained contaminated soil at a remote site in northern Alberta. The this climate is ...

Oct. 12, 2017

By Ivey International Inc.

PROJECT BACKGROUND At a manufacturing site located in Cookeville, TN, on and offsite soil (tight clays) and groundwater contaminated with chlorinated solvents, were discovered as the result of a Phase I and a Phase II investigation. The client entered the State of Tennessee Voluntary Clean-up Oversight and Assistance Program (VCOAP), which resulted in an informal focused feasibility study to ...

Dec. 31, 2006

By Regenesis

Abstract A recent U.S. Environmental Protection Agency expert panel on dense non-aqueous phase liquid (DNAPL) remediation concluded that uncertainty in the costs and benefits of applying source depletion technologies (i.e., active remediation in source zones) is one key factor that discourages widespread use of these technologies at DNAPL sites (Kavanaugh et al., 2003). To reduce this ...

Oct. 30, 2014

By TRS Group, Inc.

This study presents physical-numerical modelling of petroleum contaminant transport and enhanced in situ bioremediation in heterogeneous subsurface environment. The approach is based on development of a three-dimensional multi-layered physical model coupled with a three-dimensional multiphase multi-component numerical model. An experimental scheme was designed to conduct 40-day benzene transport, ...

Aug. 1, 2010

By Inderscience Publishers

Background A contaminant source area resulted from the injection of chlorinated solvent-containing liquid waste and sanitary sewage to the Snake River Plain Aquifer from the mid-195s to 1972. The source is primarily an organic sludge containing up to 3% TCE. The sludge is present in the fractured basalt surrounding the former injection wells. A plume of TCE in ...

Jun. 24, 2012

By JRW Bioremediation, L.L.C.

An in-depth discussion of the EOS® patented technology and its usefulness for site remediation is presented. Details of how the technology works, design considerations as well as strengths and limitations of the technology are presented. 1.1 INTRODUCTION Management of groundwater contaminated with chlorinated solvents, perchlorate, and explosives is one of the Department of Defense’s (DoD’s) ...

Apr. 30, 2006

By EOS Remediation, LLC

Site Summary West Virginia Ordnance Works (WVOW) was a trinitrotoluene (TNT) manufacturing facility from 1942-1945 and used 12 TNT production lines. The production of TNT resulted in soil and groundwater contamination adjacent to the manufacturing building. The majority of the contamination was found within the shallow aquifer which consists of tight clays. Alternative options included insitu ...

Dec. 31, 2003

By Regenesis

Hydrogen Release Compound (HRC) is a food grade, polylactate ester that, upon being deposited into the aquifer, is slowly hydrolyzed to release ...

Dec. 31, 2000

By Regenesis

1. Use of an oleophilic nutrient in combination with IXPER 75C, a chemical oxyen source resulted in subsurface hydrocarbon reduction at this site. 2. The multiple slurry applications did not impact the downgradient stream from either the hydro carbon or slurry constituent residuals. 3. A rule of thumb approach provided sufficient support to the indigenous microorganisms to enhance the rate of ...

Apr. 24, 2008

By Solvay

Bench-scale laboratory tests were conducted to evaluate and compare the enhanced bioremediation of pentachlorophenol (PCP) in groundwater under anaerobic and aerobic conditions. While tests under both conditions showed a significant reduction of PCP over the 3-month test period (greater than 90 percent reduction compared to 40 percent in controls), removal to concentrations below the 10 μg/L ...

Dec. 31, 2000

By Regenesis

Site Summary A former industrial facility had one 1,000-gallon diesel UST for use in fueling an emergency generator.  Following removal of the UST, site investigations indicated diesel fuel contamination at levels above Florida Department of Environmental Protection (FDEP) Guidance Criteria. Further, total petroleum hydrocarbon (TPH) and polyaromatic hydrocarbon (PAH) contamination in ...

Mar. 21, 2007

By Regenesis

Formulations which are patented non-ionic surfactant mixtures used in the in situ and ex situ treatment of petroleum hydrocarbons, chlorinated solvents, heavy metals, and more recently PAHs, PCBs and MTBE type contaminated waste are involved in Surfactant Enhanced Bioremediation (SEB®) using Iveysol ®. These surfactant formulations have the ability to enhance soil biodegradation. During in ...

Apr. 4, 2010

By Ivey International Inc.

Biodiesel produced from rapeseed oil was used as a cost-effective and sustainable agent to enhance crude oil biodegradation in sand microcosms. The initial concentration of crude oil and total petroleum hydrocarbon (TPH) was 20,000 and 18,750 mg/kg, respectively. The mass ratio of biodiesel to crude oil was 0 (designated T1), 1:10 (designated T2), 1:4 (designated T3), and 1:2 (designated T4). ...

Sep. 30, 2015

By IWA Publishing