air separation Articles

  • Urban Air Quality Management

    ' Poor air quality due to pollution is a serious environmental problem in most urban areas. The greatest burden of pollution is on human health. Urban air quality management requires an integrated approach that (i) identifies the most serious problems and measures that offer cost-effective and feasible solutions across a range of economic sectors and pollution sources including industries, ...


    By The World Bank

  • Tracer experiment and RTD analysis of DAF separator with bar-type baffles

    This paper describes the development of a new dissolved air flotation (DAF) separator with a flow streamlining baffle to improve solid separation efficiency. The analysis of the RTD (residence time distribution) curves indicated that the parameter θ10 (dimensionless time at which 10% of tracer has discharged) increased from 0.38 for control reactor to 0.54 for the ...


    By IWA Publishing

  • Experimental investigation into performance characteristics of reversed flow cyclone separators

    Cyclone separators have been extensively used both for particle sampling and particle removal from fluids, air or process gases in the field of air pollution control and in industry. In this experimental study, effects of inlet velocity, inlet shape and cyclone length on the cyclone collection efficiency and pressure losses were investigated. A new cyclone design without conical part and its ...


    By Inderscience Publishers

  • A Breath of Fresh Air for Your

    As the full effect of the Federal Clean Air Act (CAA) Amendments continue to impact today’s industry, many companies will be required to install new or additional air pollution control equipment.  With over two decades of proven success, catalytic oxidation is a popular method for controlling volatile organic compound (VOC) emissions.During the past 25 years, industry has made progress in ...


    By The CMM Group, LLC

  • Air filtration applications for membranes

    Given their unique performance attributes membranes are finding use in a growing number of high efficiency air filtration applications. One example is in respirators and personal protective equipment. Applications where intense physical demands and risk of exposure to harmful contaminants are present demand the high efficiency / low pressure drop combination of expanded polytetrafluoroethylene ...

  • Improving air quality in the office

    Most people spend the main part of their day indoors – in the home, school or office environment. Focusing specifically on improving air quality in the office and workplace setting, we are looking at the key potential sources of pollution which impact upon air quality and employees’ health. Examples include, outdoor air (particularly relevant if the workplace is next to a busy road), ...


    By Commercial Air Filtration

  • Clean air for Moorburg

    The energy site of Moorburg at the Port of Hamburg hosts one of the most modern hard coal-fired power plants in the world: as one of the leading electricity producers in Europe and operator of the plant, Vattenfall focuses on environmental protection and resource conservation. The flue gas desulphurisation system of the power plant was equipped with wet desulphurisation and innovative technology, ...

  • Food Processing: Venturi Scrubber and Separator Cuts Steam Costs Case Study

    New Solutions to Plant Problems:Soybean extraction at Land 0 ‘ Lakes, Inc., Sheldon, IA, is an energy- intensive operation. Beans must be cleaned, properly dried, tempered, cleaned a second time, fragmented, and heat-conditioned to increase smface area and distort cell walls. On the extraction side of the process, soybean flakes are extracted by repeated countercurrent percolation of hexane ...


    By CR Clean Air Group, LLC

  • Practical dissolved-air flotation experience

    In this report the performance of the Bayer Flotation Technology BayFlotech? is demonstrated by comparing process data with figures published by the German Deutsche Vereinigung fur Wasserwirtschaft, Abwasser und Abfall e.V. (ATV) and Verband Deutscher Maschinen u. Anlagenbau e.V. (VDMA) associations. In addition experience gained under plant operation is described. Inter alia the relation between ...


    By Inderscience Publishers

  • Air Emissions/Off-Gas Treatment

    A number of technologies have been widely applied for removal of VOCs from off-gas streams. However, the application of these technologies to off-gases from site remediation may be quite limited. Biofiltration has been widely applied for VOC destruction in Europe and Japan, but it has only recently been used in the United States. Catalytic and thermal oxidation are widely used for the destruction ...

  • 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

  • Zero waste in Buenos Aires (Argentina)

    In late 2005, the City Council in Buenos Aires, Argentina unanimously passed a law, “Integral Management Of Solid Urban Waste,” a Zero Waste law. The law sets goals and milestones to reduce the volume of municipal solid waste going to landfill disposal. “The first milestone is 30 percent reduction of waste to landfill by 2010,” says Cecilia Allen of Global Alliance for Incinerator Alternatives' ...


    By BioCycle Magazine

  • Evaluation of initial collision-attachment efficiency between carbon dioxide bubbles and algae particles for separation and harvesting

    Microalgae have been regarded as a pollutant causing algal blooms in lakes or reservoirs but have recently been considered as a useful source of biomass to produce biofuel or feed for livestock. For the algae particle separation process, carbon dioxide (CO2), one of the main greenhouse gases, is dissolved into a body of water rather than being emitted into atmosphere. This study aims at ...


    By IWA Publishing

  • Membranes and theoretical modelling of liquid–gas membrane separation for aromatic compounds removal from water: a review

    Liquid–gas membrane separation techniques - namely, vacuum membrane distillation, membrane air–stripping/sweeping and pervaporation - are non–equilibrium membrane separation processes emerging for the removal of aromatic compounds from industrial wastewater and polluted ground waters. This review focuses on polymeric hydrophobic membranes which are commonly employed in the liquid–gas membrane ...


    By Inderscience Publishers

  • Visualized study on the interaction between single bubbles and curved solid surface in flotation separation process

    The present study has been devoted to bubble–curved solid surface interaction in water, which is critical to the separation of suspended particles by air flotation. For this purpose, two particular stages of the interaction (collision and attachment) have been examined visually using high-speed photography in a laboratory-scale flotation column. The effects of the surface material and ...


    By IWA Publishing

  • Analysis of monitoring results of the separation and greywater treatment system at Chester Woods Park, Olmsted County, Minn.

    Introduction In 1993, Olmsted County installed an advanced individual sewage treatment system (ISTS) at the caretaker's residence at a County-owned park to demonstrate waste load reduction and downsizing of drainfield area. The subject system has two components--1) a composting/vermiculture blackwater system and a 2) aerobic graywater treatment system. The separation of the high strength ...


  • Case study - Mazzei degas separator selected for Wichita aquifer storage and recovery project

    GDT Degas Separator Selected As Best Method For Entrained Gas Bubbles Removal Wichita, KS The Problem: In the 1990s, the City of Wichita, Kansas developed a water supply plan that included creating a sustainable water supply through the year 2050. The key component of the plan is recharging the large aquifer that lies under the region with 100 MGD of water from the ...

  • Packed Cyclone Separator Removes Dust Particles While Recycling Process Liquids; New Solutions to Plant Problems

    Problem: The Monomeros Colombo Venezolanos plant in Barranquilla, Colombia, jointly operated by the South American countries of Colombia and Venezuela, produces caprolactam for the textile industry and various chemical fertilizers for agricultural use. Recently agricultural plant capabilities were increased with the addition of process units to improve the production and quality ...


    By CR Clean Air Group, LLC

  • Flotation of algae for water reuse and biomass production: role of zeta potential and surfactant to separate algal particles

    The effect of chemical coagulation and biological auto-flocculation relative to zeta potential was examined to compare flotation and sedimentation separation processes for algae harvesting. Experiments revealed that microalgae separation is related to auto-flocculation of Anabaena spp. and requires chemical coagulation for the whole period of microalgae cultivation. In addition, microalgae ...


    By IWA Publishing

  • Sustainable wastewater separation treatment systems coupled with nutrient and water reducing greywater reuse technologies

    Nationally and internationally, pressure is increasing to introduce nutrient reducing, water conserving and recycling measures for sustainable residential and small community water/wastewater systems. Reports of inadequate water quality and quantity are being reported daily. Over the past thirty years the federal government and State of Alaska have invested over 4 billion dollars installing piped ...


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