air stripping Articles

  • Aeration and Stripping

    Aeration in the treatment of water is a process that is used for either of two purposes: either to add oxygen (or possibly another gas) to water (adsorption) or to remove an unwanted gas from water (desorption or stripping). It follows that aeration is most likely to be encountered in the treatment of ground waters. Aeration can be carried out in a variety of ways. The most appropriate ...


    By IWA Publishing

  • In-well Vapor Stripping - Technology Overview

    In-well vapor stripping technology involves the creation of a ground-water circulation pattern and simultaneous aeration within the stripping well to volatilize VOCs from the circulating ground-water. Air-lift pumping is used to lift ground-water and strip it of contaminants. Contaminated vapors may be drawn off for aboveground treatment or released to the vadose zone for biodegradation. ...


  • Modeling of air stripping from volatile organic compounds in biological treatment processes

    The removal of volatile organic compounds from biological treatment processes occurs through several mechanisms. These include biodegradation, adsorption onto solids, and air stripping or volatilization to the atmosphere. Volatilization results in fugitive emissions to the atmosphere, which is largely uncontrolled. Recent regulations have called ...

  • Application of air stripping to powdered activated carbon adsorption of geosmin and 2-methylisoborneol

    Removal of odor-causing compounds (OCCs) including geosmin and 2-methylisoborneol (2-MIB), well known to cause the musty and earthy odor in drinking water, was investigated using powdered activated carbon (PAC) adsorption and air stripping processes. Removal by air stripping was mainly affected by aeration flow rates with volumetric mass-transfer rates of 0.002–0.005 min−1. Aeration also proved ...


    By IWA Publishing

  • Air pollution from air stripping of industrial VOCs: a mitigating alternative using renewable energy

    Four reaction beds (glass, Plexiglas, concrete and metal) exposed to solar (UV) light and coated with titanium dioxide were used for testing the degradation of Dichloroacetic Acid (DCA) in water, with concentrations of 130 ppmv, 390 ppmv and 650 ppmv. The glass-bed reactor showed the highest photonic efficiency followed by Plexiglas, concrete and metal. The 390-ppmv DCA gave the highest rate of ...


    By Inderscience Publishers

  • Paint Stripping Using Plastic Media: Carstrip

     Carstrip Pty Ltd has established a dry process for stripping paint from motor vehicles undergoing panel repairs or restoration. The process uses ground plastic media in a sandblasting-type process to remove the paint from the vehicle without damaging the metal. The process has eliminated the generation of waste sludge associated with chemical stripping processes, and has reduced the labour ...


  • Simultaneous regeneration of exhausted zeolite and nitrogen recovery using an air stripping method at alkaline pH

    Ammonium nitrogen recovery using natural zeolite from the permeates of anaerobic membrane bioreactors was investigated with batch and continuous experiments. Regeneration of exhausted zeolite was compared between mechanical shaking and air stripping, and experimental results showed the superiority of air stripping over the shaking. Liquid circulation and air flow rates were optimized in a ...


    By IWA Publishing

  • Application of ultrasound and air stripping for the removal of aromatic hydrocarbons from spent sulfidic caustic for use in autotrophic denitrification as an electron donor

    Spent sulfidic caustic (SSC) produced from petroleum industry can be reused to denitrify nitrate-nitrogen via a biological nitrogen removal process as an electron donor for sulfur-based autotrophic denitrification, because it has a large amount of dissolved sulfur. However, SSC has to be refined because it also contains some aromatic hydrocarbons, typically benzene, toluene, ethylbenzene, xylene ...


    By IWA Publishing

  • Analysis and optimization of ammonia stripping using multi-fluid model

    Ammonia recovery from anaerobic digestion (AD) is a notably beneficial process for removing excess nitrogen, producing low cost fertilizer and enhancing odor abatement. A process was developed for nutrients recovery by integrating a simple and effective stripping process with AD system. To design, optimize and scale up this system, multi-fluid model was developed to simulate flow, mass transfer ...


    By IWA Publishing

  • SVE and Air Sparging

    Stage 1: The system is a PLC controlled plant equipped with telemetry. Rotary Lobe blowers were used to abstract vapour contaminated with chlorinated hydrocarbons and a similar high pressure blower was used to inject air via solenoid valves individually controlled by the PLC. Extracted vapour was treated in large GRS 2 tonne vapour-phase activated carbon vessels.Stage 2: The system comprised ...


  • Building Services Management - Air Sampling -

    Untitled Document Maintenance professionals are often the first responders to mold complaints in their facilities. building occupants can be exposed to fungal (mold) ...


    By EMSL Analytical, Inc.

  • A Smelly Situation: Snuffing Out H2S in Water and Air

    Untitled Document Summary: Dealing effectively with hydrogen sulfide (H2S) in groundwater presented a major challenge for coastal Indian River County, Fla. Stripping the odorous ...


    By Calgon Carbon Corporation

  • Air quality issues drive vehicle alternatives

    Vehicle exhaust systems remain a major source of air pollution in cities, despite the progress being made to reduce emissions from new models. Energy World takes a look at efficiency improvements, and the alternative fuel alternatives to petrol and diesel. In early April, the south of Britain woke to a hazy blanket of smog. A few weeks earlier, Paris had choked and spluttered through its own ...


    By Energy Institute (EI)

  • Air and Ozone Sparging of TCE Using a Directionally Drilled Horizontal Well

    A one year pilot test was performed at Marine Corps Base, Camp Lejeune to evaluate the performance of air and ozone-enhanced air sparging via a horizontal well. The primary contaminant at the site is trichloroethylene (TCE), with concentrations ranging from 200 to 800 μg/L at a primary target depth of 40 to 45 feet below ground surface (bgs). Site geology consists of silty clay overburden, ...


    By CH2M Hill Companies, Ltd.

  • Kinetic Evaluation of H2S and Ammonia Biofiltration for Air Emissions Control

    ABSTRACTTraditionally the control of H2S emissions includes direct air stripping, precipitation and chemical oxidation. In this study, low cost biofiltration using a natural media of wood chips and compost and a commercial biofiltration media were evaluated for the removal of moderate concentrations of H2S (up to 50 ppmv) at different Empty Bed Contact Times (EBCT) in the range of 10-80 seconds. ...


  • Removal of methyl tertiary butyl ether (mtbe) vapour from contaminated air streams using different bacterial cultures in biotrickling filters.

    Methyl tertiary butyl ether (MTBE) was firstly introduced in the Islamic Republic of Iran in the end of 2001 as gasoline octane enhancer. Ordinary, reformulated gasoline contains 11-15% (v/v) of MTBE. Because of its low production cost and excellent blending characteristics, its production has been grown exponentially in the world, reaching a value of over 33 million tons per year (Fortin and ...


    By University of Tehran

  • KS 1000 compact stripper case study - IEG Technologie GmbH

    VOC-contaminated groundwater is treated in a 2-stage low-profile compact vacuum stripper (CVS). A negative pressure blower applies a vacuum to the treatment chamber. In this chamber a 2-stage stripping reactor is located and the stripping air is directed to the upper tray. The groundwater loops around on the upper tray along designate barriers, while the stripping air is being pulled through the ...


    By IEG Technologie GmbH

  • From Wastewater Treatment to Sweet Pineapples

    In wastewater treatment, ammonia that is removed from sewage used to be discharged directly to the atmosphere. Nowadays, studies have identified that ammonia emissions are of major concern to air quality. This has led to a new way of thinking. Sulzer offers modern closed-air-loop systems for wastewater treatment that transform ammonia into a common soil fertilizer. This reuse of a waste product ...


    By Sulzer

  • Compacting waste - Case Study

    Throw away little things and save big bucks? It hardly seems likely, but that's just what the U.S. Air Force is doing. At Randolph AFB, TX, they are putting usedand hazardous-air filters into a state-of-the-art industrial compaction machine and saving thousands of dollars in hazardous waste disposal. The air filters contain aircraft paint removed by plastic media blasting (PMB). Small plastic ...


    By Waste Control Systems Inc

  • In Situ Physical/Chemical Treatment for Ground Water and Leachate

    The main advantage of in situ treatments is that they allow ground water to be treated without being brought to the surface, resulting in significant cost savings. In situ processes, however, generally require 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 ...

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