aquifer injection Articles

  • 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

  • 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

  • In Situ Chemical Oxidation Remediation Pilot Study Of A Karst Bedrock Aquifer Contaminated With Chlorinated Solvents

    ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The ...


    By Weston Solutions, Inc

  • Confined aquifer responses to pumping – potential impacts on plume migration

    Pressure waves are transmitted in confined aquifers with relatively little damping compared with surficial phreatic aquifers. Confined aquifers may therefore be subject to abrupt and far-reaching changes in the rate and direction of groundwater flow due to changes in well pumping. Where there is a mechanism for contaminants to reach a confined aquifer, the contaminant migration within the aquifer ...

  • 3-D Microemulsion (3DMe)™ Superior Distribution: Cost-Effective Treatment of Large Plumes

    3-D Microemulsion (3DMe)™, a form of HRC Advanced®, is the current state-of-the-art in slow-release electron donor products for the in-situ treatment of chlorinated solvents in groundwater. By employing a sequential, staged release of hydrogen, 3DMe provides an immediate and long-term release of hydrogen for enhanced longevity. Equally as important is the compound’s unique self-distribution ...


    By Regenesis

  • DOD evaluates bioaugmentation for remediating low-pH aquifers

    The US Department of Defense (DOD) has completed pilot-scale work on the 'MAG-1' site at Fort Dix, NJ, to test suitability of anaerobic bioremediation for an aquifer with low pH. Project results will be used to design full-scale ground-water treatment at MAG-1. In addition, technical criteria gained from the demonstration will be integrated into DOD’s remediation strategy for its many facilities ...

  • 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

  • Florida Utility Uses Aqua TROLL 200 Instruments to Monitor Aquifer Storage and Recovery System

    Aqua TROLL 200 tracks groundwater levels and water quality of injected and retrieved water Application Aquifer Storage and Recovery (ASR) systems can store large amounts of water deep underground and can reduce development of expensive surface reservoirs. Aquifer storage eliminates evaporative losses typical of surface water reservoirs and offers better protection from tampering. ASR ...


    By In-Situ, Inc.

  • Numerical modeling of aquifer thermal energy efficiency under regional groundwater flow: a case study at Oslo Airport

    The main purpose of this paper is to present a robust forward model for simulating extraction and storage of thermal energy in an aquifer. The model is a local three-dimensional finite element model with boundary conditions derived from an analytic large-scale model based on the regional water balance. Numerical investigations and thermo-hydraulic evaluation of a typical dipole ...


    By IWA Publishing

  • Case Study: Manipulating Groundwater Redox Conditions for MTBE Remediation

    A pilot study was conducted to investigate the potential to foster anaerobic methyl tert butyl ether (MTBE) biodegradation. The pilot test site, located on Long Island, New York, is characterized as a glacial out-wash aquifer with a high groundwater velocity over 2 ft/day. The MTBE plume is typical of similar plumes that have quickly migrated in this glacial out-wash aquifer. It is ...


    By Regenesis

  • Edible Oil Barriers for Treatment of Perchlorate Contaminated Groundwater

    An EOS® biobarrier was designed and implemented to remediate perchlorate contaminated groundwater. The report describes the site characterization, design steps, implementation, monitoring results and lessons learned from this effective remedial approach. EXECUTIVE SUMMARYThis final technical report documents the demonstration of emulsified edible oils for remediation of perchlorate in ...


    By EOS Remediation, LLC

  • Water quality dependence on the depth of the vadose zone in SAT-simulated soil columns

    ABSTRACTThree soil aquifer treatment (SAT) columns were operated for five months to investigate the dependence of the treated water quality upon the depth of unsaturated vadose zone in terms of its organics, nitrogen and phosphorus contents. It was found that DOC removal was independent of the unsaturated vadose zone depth except during the initial flooding period when the effluent was injected ...


    By IWA Publishing

  • Groundwater contaminated with chlorinated solvents - Air force center for environmental excellence

    LOCATION:  Dover, DelawarePROJECT DATE:  October 1999 to presentCLIENT:  Air Force Center for Environmental Excellence (AFCEE) BACKGROUND: Groundwater contaminated with chlorinated solvents is a common problem to many US Air Force Bases. TSI in conjunction with Solutions Industrial & Environmental Services (Solutions-IES) of Raleigh, NC approached AFCEE with an innovative method utilizing ...


    By Terra Systems, Inc. (TSI)

  • 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

  • Water quality management of aquifer recharge using advanced tools

    Managed aquifer recharge (MAR) with recycled water or other alternative resources is one of the most rapidly growing techniques that is viewed as a necessity in water-short areas. In order to better control health and environmental effects of MAR, this paper presents two case studies demonstrating how to improve water quality, enable reliable tracing of injected water and better control and ...


    By IWA Publishing

  • 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

  • DOC and UVA attenuation with soil aquifer treatment in the saturated zone of an artificial coastal sandfill

    Results from a direct recharge experiment conducted in the field to investigate DOC and UVA254 attenuation rates during the direct injection of UF treated wastewater into a artificial coastal sandfill are presented in this paper. Approximately 500 m3 of ultra-filtered wastewater was injected into the saturated zone, over a period of 9 days. The movement of the plume was tracked over 80 days, ...


    By IWA Publishing

  • 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

  • Bioaugmentation for accelerated in-situ anaerobic bioremediation

    A successful anaerobic bioaugmentation was carried out on a trichloroethene (TCE)-contaminated aquifer at Dover Air Force Base, DE, using a microbial enrichment culture capable of dechlorinating TCE to ethene. A hydraulically controlled pilot system 12   18 m was constructed 15 m below ground surface in an alluvial aquifer to introduce nutrients and substrate into the groundwater. ...


    By Terra Systems, Inc. (TSI)

  • Anaerobic Bioremediation of Groundwater Using Edible Oil Substrate EOS® In an Unconfined Groundwater Aquifer

    ABSTRACT: To treat groundwater contaminants in situ, enhanced anaerobic bioremediation processes can be stimulated through addition of soluble substrates. At a dry cleaners site located in San Jose, California, the goal was to find a substrate that is long lasting and easily distributed into the saturated soils. After evaluating several alternatives, in situ bioremediation using an emulsified ...


    By EOS Remediation, LLC

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