aquifer injection Articles

  • PCE and TCE Remediation Continues Years After Injection

    Site Summary Subsurface investigations at this dry cleaning facility revealed elevated levels of PCE and TCE in groundwater and soil. Accelerated bioremediation using HRC was selected for use at the subject site as it offered a groundwater remediation method that would not interrupt on-going facility operations while effectively supporting the degradation of the contaminants. Approximately 250 ...


    By Regenesis

  • Time-Release Electron Donor Technology: Results of Forty-Two Field Applications (PDF)

    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 ...


    By Regenesis

  • Bioremediation of chlorinated phenols with INTEROX® case study

    The mass balance enabed the evaluation of the individual contribution of the flushing and the biodegradation processes to the global remediation. Initially, flushing was the main process of remediation. After the deveopment of in situ conditions favorab e for the aerobic biodegradation, the main process of contamination remova is bioremediation contributing for 71% to the global contaminant ...


    By Solvay

  • The Thermodynamic Bubble problem and its relevance for In-Situ thermal remediation

    ABSTRACT This paper presents the thermodynamic bubble problem and its relevance for successful design of an in-situ thermal remedy of DNAPL in the water saturated zone. This investigation is relevant to the mass transfer of chemicals that have been volatilized as a result of an in-situ thermal remediation process. The volatilized chemicals exist as numerous entrained bubbles in the water ...


    By McMillan-McGee Corp.

  • Field investigation of aquifer storage and recovery (ASR) technique to recharge groundwater: a case study in Punjab province of Pakistan

    Fast decline of groundwater levels in Pakistan requires the use of artificial recharging techniques to minimize the adverse effect of over pumping. A study was conducted in the Toba Tek Singh district, Punjab, Pakistan, to investigate aquifer storage and recovery (ASR) technology to recharge groundwater. The facility was developed by drilling a pumping/injection well and constructing the water ...


    By IWA Publishing

  • Answers to questions about oil waste in California aquifers

    California, the country's third-largest oil-producing state, has improperly given oil companies more than 2,500 permits to inject production fluids and oilfield waste into underground water supplies that are used for drinking water or irrigation, state records show. Nearly half of those disposal wells were approved or first started injections in the last four years under Gov. Jerry Brown, an ...


    By Associated Press

  • Enhanced Bioremediation of Chlorinated Solvents (PDF)

    Enhanced in situ bioremediation of chlorinated solvents in groundwater has been successfully demonstrated at many sites by supplying lactic acid as an electron donor. The source of lactate for these successful pilot tests is Hydrogen Release Compound (HRC), a polylactate ester specially formulated for slow release of lactic acid upon hydration. HRC has been delivered to chlorinated ...


    By Regenesis

  • BTEX/TPH Remediation Using an Oxygen-Release Compound (ORC®)

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


    By Regenesis

  • Aquifer recharge for securing water resources: the experience in Llobregat river

    The Llobregat Delta Aquifer has historically been a strategic water supply resource to the Barcelona metropolitan area. The use of river water combined with the exploitation of groundwater resources during dry periods has enabled the demographic and economic growth of the Barcelona area during the last fifty years. The aquifer overexploitation has entailed the decrease of groundwater level and ...


    By IWA Publishing

  • Prevent Stagnation Zones during Injection to Improve Contact Efficiency

    When injecting into multiple wells simultaneously, stagnation zones can develop preventing effective reagent delivery. Figure 1 shows the simulated EOS Pro distribution in a homogeneous aquifer when EOS Pro is injected into all the wells in a biobarrier at the same time. Simultaneous injection creates gaps in the biobarrier where converging streamlines prevent effective ...


    By EOS Remediation, LLC

  • TCE/Fractured Bedrock Remediation in VA

    Site Summary At a manufacturing facility HRC was injected into a crystalline bedrock aquifer contaminated with TCE and its daughter products. Groundwater flow at this site is controlled by fractures in the crystalline rock with little or no permeability present beyond these fractures. The industrial facility had been in operation for over 30 years. Contamination levels reached 220 ppb of TCE so ...


    By Regenesis

  • Mitigating Environmental Impact Of Gold Mine Wastewater Through Ozone Oxidation And Aquifer Re-injection

    US Environment Protection Agency (USEPA) regulations require mining operations to remediate their waste streams prior to environmental discharge. Wastewater streams from gold mine operations can be particularly toxic due to the potential for cyanide contamination and the concentration of metals contained in the wastewater effluent. This paper reviews the challenges and success of installing and ...

  • Oil Analysis Helps Water Plant Cut Annual Maintenance costs by $25,000 - Case study

    The city of Chandler (Ariz.) Municipal Utilities Department (MUD) employs coagulation, sedimentation, active flow control and filtration to produce 60 million gal per day (mgd) of water at its surface water treatment plant. In addition, the system includes 27 wells and 21 booster stations controlled by SCADA. Water distribution is provided through more than 1,200 miles of water main, in excess of ...


    By Spectro Scientific

  • Subsurface iron and arsenic removal: low-cost technology for community-based water supply in Bangladesh

    The principle of subsurface or in situ iron and arsenic removal is that aerated water is periodically injected into an anoxic aquifer through a tube well, displacing groundwater containing Fe(II). An oxidation zone is created around the tube well where Fe(II) is oxidised. The freshly formed iron hydroxide surfaces provide new sorption sites for soluble Fe(II) and arsenic. The system's efficiency ...


    By IWA Publishing

  • Effective distribution of edible oils

    Edible oil was injected at five sites to promote reductive dechlorination. The edible oil was injected as a non-aqueous phase liquid (NAPL) or as an emulsion of oil, an emulsifier, and water. At Dover Air Force Base, injection of the emulsion into a barrier resulted in greater distribution of the total organic carbon (TOC) and more rapid dechlorination than direct injection of the edible oil into ...


    By Terra Systems, Inc. (TSI)

  • Aerobic Bioremediation of MTBE and BTEX at a USCG Facility

    Untitled Document Abstract: A full-scale in-situ bioremediation of dissolved methl-tert-butyl-ether (MTBE) and benzene, toluene, ethylbenzene and xylenes (BTEX) was ...


    By Regenesis

  • Meeting Melbourne's future demand for water using aquifer storage and recovery

    Melbourne is one of the fastest growing cities in Australia. City West Water (CWW) has developed an Integrated Water Cycle Management (IWCM) Strategy which includes the development of aquifer storage and recovery (ASR) schemes to store recycled water and storm water to assist with meeting future growth, where these schemes can be demonstrated to be viable and cost effective. The investigation ...


    By IWA Publishing

  • Escalating well construction costs in South Florida significantly exceed ENR construction cost index

    The South Florida Water Management District (SFWMD) develops long-term, comprehensive regional water supply plans to provide for current and future water use. The use of alternative water supplies is extremely important to the development of future water supply in South Florida. Alternative water supplies include brackish water sources that must be converted to potable water using desalination ...

  • Case study – benzene contamination retail gas station, Colorado

    Introduction The scope of work for this site included an expansion of an existing soil venting system to remediate impacted soil and injection of a carbon-based petroleum degrading product to remediate long-term groundwater impacts. By using a combination of remediation technologies, including LT Environmental’s (LTE) TerraCert™ program, the overall goal of a cost effective cleanup ...

  • Undersea storage for US carbon emissions

    Researchers are working hard on methods to mitigate, reduce or compensate for CO2 emissions. One of these, geological carbon sequestration, involves injecting CO2 into deep saline aquifers, or depleted oil and gas reservoirs so that it is not released into the atmosphere where it contributes to global warming. Now US researchers have found a potential new location for undersea CO2 storage, which ...

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