air cleaning Articles

  • Dry Air Scrubber for Propylene Oxide

    Background For decades, Advanced Air Technologies, Inc. has been the leader in air scrubber  technology for abatement of Ethylene Oxide (EtO) emissions.   In fact, AAT, Inc. was founded in 1987 on a unique dry scrubbing, chemi-sorption process for EtO.  The result is a series of fixed bed “Safe-Cell II” dry scrubbers, consisting of the DR-490, DR-50, and ...

  • Scrubber Removes Grease and Particulates from Air Exhaust

    Operating Issue A food-industry leader in Alabama operates several pork-sausage cookers that exhaust over 4,000 ACFM of moisture and pork grease. The operator installed Electrostatic Precipitators (ESPs) to treat the exhaust but these systems performed poorly and generated high maintenance and operating costs. Additionally, these systems were antiquated and required significant capital ...


    By Pollution Systems

  • Sterile wastewater treatment with vacuum distillation

    Hygiene requirements are growing increasingly strict in many sectors, and the treatment of industrial wastewater is no exception. The vacuum distillation process in particular has to deal with the question of sterile treatment and subsequent storage of water obtained from the process. The mere possibility of reintroducing wastewater into the production process makes it imperative to prevent ...


    By H2O GmbH

  • Kansas Facility Finds Fast, Reliable Fix to Cavitation Damage

    The Hutchinson (Kansas) Water Plant gets its water from 20 wells. The water is pumped out of the wells and into a reverse osmosis water treatment center to purify and ensure safe drinking water. At that point, a portion of the water is taken off from the main line, run through the reverse osmosis system and then mixed back ...


    By Singer Valve Inc.

  • The Right Mix for Clean Air

    Reducing air pollution is an increasingly important topic all around the world. Many governments—also in developing countries—set new limits for emissions such as nitrogen oxides in flue gas. Sulzer offers advanced mixing technology for flue gas cleaning. The installation in a large power plant shows that these high-performance mixers can cope with the most difficult requirements. ...


    By Sulzer

  • A new vision for clean air

    When President George H.W. Bush signed into law the Clean Air Act Amendments (CAAA) of 1990, he put in place a precedent-setting statute that completely revamped our nation’s approach to improving air quality. That statute was an earnest commitment to environmental protection; the comprehensive air pollution control strategy established in it provided state and local regulators with tools to make ...

  • Air as Clean as the Driven Snow

    While California is the most populated state in the nation, it is also home to some of America’s most natural and pristine wilderness and recreation areas. One such venue is the Snow Summit Ski Resort in Big Bear Lake.  Situated just over two hours from Los Angeles, Snow Summit is a fullservice winter resort that opened in 1952 and operates an average of 142 days a year. ...

  • In the queue for clean air

    The National Emissions Ceilings Directive (NECD), adopted in 2001, defines the maximum emissions on a national level for four major air pollutants that have a high impact on human health and the environment. These are: sulphur dioxide, nitrogen oxides, volatile organic compounds and ammonia. The Directive will undergo revision in 2008, which would set new interim air quality targets and related ...

  • Technology: clean air’s unsung hero

    Last year, we celebrated the 40th anniversary of the U.S. Clean Air Act (CAA) and the 20th anniversary of the 1990 Amendments to the CAA. The CAA has been a huge success. From 1990 to 2008, emissions of six common pollutants were down 41%, while gross domestic product grew 64%. Emissions of volatile organic compounds dropped 31%, carbon monoxide dropped 46%, and sulfur dioxide dropped 51%. Lead ...

  • Stakeholder Perspectives on the Clean Air Interstate and the Clean Air Mercury Rules

    In a follow-up to last month’s detailed overviews of the Clean Air Interstate Rule (CAIR) and the Clean Air Mercury Rule (CAMR), this month EM presents perspectives on the two rules from representatives of a range of stakeholders, including EPA, the states, the regulated community, and the environmental community. Last month, EM featured detailed overviews of two major air quality regulations ...

  • Clean air and fast return to operation

    Zero styrene in the Renovation of Industrial Processing plants and Storage tanks Renovation without hassle In industrial processing and chemical storage plants the continuity of operation is of major importance. Plant downtime may have significant financial implications. Also equipment breakdown may negatively affect plant safety as in many cases dangerous ...


    By HMT Inc.

  • Cleaning up by cleaning up

    Historically, some big businesses have made big messes. Greenhouse gas emissions, oil spills and unsafe water have become unsavoury but all-too-commonplace topics in the news and industry is beginning to sit up and take notice. Within the past couple of decades, businesses have been cropping up in Saskatchewan with the goal of cleaning up others’ messes - or simply keeping a mess from ...


    By OZONATOR Industries Limited

  • Keep your air clean with Wet Dust Collectors

    Wet dust collectors use liquid — often but not always simple water — to capture and separate dust, mist, fumes, and other particulate matter from a stream of flowing gas — often but not always simple air. Some wet dust collectors spray liquid in a sheet across the stream of gas; others bubble the gas through ...


    By ProVent, LLC

  • Dry/Wet Scrubbers for Clean Air Compliance

    Air-scrubbing venturis and towers may be the answer to clean air compliance for small- to medium-sized companies. Forthcoming requirements of the Clean Air Act Amendments of 1990 will inventory many more specific chemicals considered hazardous. From acetaldehyde to xylenes, the list regulated under the air taxies program includes 189 hazardous air pollutants (HAPs). That number may ...


    By CR Clean Air Group, LLC

  • Clean energy: How much hot air?

    NewScientist’s January 28 issue is likely to unsettle clean energy advocates – but it is worth the read. The cover article, “Power paradox: Clean might not be green forever,” posits that even renewable energy can warm the planet, and eventually change ...

  • Industrial applications – Air analysis in clean air room - Case study

    Context & Challenges To ensure people’s safety and a good repeatability of industrial process, the analysis of ambient air is crucial. Especially, electronic boards are produced in clean air room by complex lithographic process using very reactive chemicals. The nature and concentration of volatile compounds can be different depending on the chemical process and can also vary ...


    By Chromatotec Group

  • Two Landmark Interpretations of the Clean Air Act

    The most recent U.S. Supreme Court term is notable for two landmark interpretations of the Clean Air Act (CAA). In Massachusetts vs. EPA (U.S., No. 05-1120, 4/2/07), the court held that greenhouse gases (GHGs) are air pollutants subject to regulation under the CAA, overruling an interpretation by the Bush administration. In Environmental Defense vs. Duke Energy Corp. (U.S., No. 05-848, 4/2/07), ...

  • Dry/Wet Scrubbers for Clean Air Compliance

    Forthcoming requirements of Ihe Clean Air Act Amendments of 1990 will inventory many more specific chemicais considered hazardous. From acetaldehyde lo xylenes, the list regulated under the air toxics program includes 189 hazardous air pollutants (HAPs). That number may grow. The Environmental Protection Agency (EPA) intends to add another 100 of more chemicais under the “prevention of accidental ...


  • Air/water cleaning for the control of particulate fouling

    Fouling of feed spacers in spiral wound membrane elements due to particulate fouling and biofouling is one of the main operational problems of nanofiltration or reverse osmosis membrane plants. Removal of particulate fouling from spiral wound membrane elements is investigated using frequent air/water cleaning (AWC). In a pilot setup two spiral wound elements were operated in parallel and were fed ...


    By IWA Publishing

  • Air bubbles enhance membrane cleaning: a future perspective

    Abstract Air bubbles generated using a novel micro-bubble generator have displayed a dramatic enhancement in cleaning efficiency when used in conjunction with specially formulated cleaning chemicals. In order to establish the effect of this application on membrane performance, a series of experiments were conducted using both a flat sheet test rig and a small scale pilot plant. ...

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