volatile organics Articles

  • Modeling of packed absorption tower for volatile organic compounds emission control

    Development of chemical industry and high vapor pressure of volatile organic compounds (VOCs) have been caused that these materials recently be considered as a source of air pollution. These are different methods for separation of VOC from air that absorption by suitable and selective solvent is an efficient method. In this research, mathematical modeling of a packed absorption tower for ...

  • Potential of hydrogen production from organic Urban Solid Waste fermentation in Mexico

    Mexico generated 35.4 million tons of urban solid wastes in 2005 of which 51% were organic ones. This biomass can be fermented into H2 when H2-based technologies increase their market penetration for the year 2020. The purpose of this work was to review studies that have utilised organic solid wastes for fermentative H2 production and to evaluate the potential for Mexico. The experimental H2 ...


    By Inderscience Publishers

  • Membrane filtration of agro-industrial wastewaters and isolation of organic compounds with high added values

    The aim of the current study was the exploitation of agro-industrial wastes or by-products such as olive mill wastewater (OMW) and defective wines. A cost-effective system for their maximum exploitation is suggested, using a combined process of membrane filtration and other physicochemical processes. Wastewaters are first treated in a membrane system (prefiltration, ultrafiltration, ...


    By IWA Publishing

  • IEST updates recommended practices to reflect leading-edge methods

    New developments covered in Recommended Practices revised recently by the Contamination Control Division of IEST include a test method for characterizing outgassed organic compounds; design and testing of Type IV (vee-bed) modular gas-phase adsorber cells; an automated surface cleaning efficiency test procedure; and production testing of filter types H through K. Characterizing Outgassed Organic ...

  • Solvent Recovery South of the Border

    With the advent of NAFTA, Mexico's package-printing industry, a major source of VOC emissions, is under increasing pressure to comply with envronmental regulations. One company, Grafo Regia, pursued an air pollution control process that has an economic payback compared to traditional oxidation. Volatile organic compounds (VOC’s) find wide spread use in the gravure printing and flexible package ...


    By AMCEC Inc.

  • Gasplasma transformation of waste streams

    The Gasplasma process developed by Advanced Plasma Power is an advanced thermal conversion (ATC) technology which has been developed for the treatment of a wide range of organic and inorganic wastes, including household wastes, hade wastes, wastes derived from landfill, and biomass. These wastes can comprise solid, liquid or gaseous wastes either singularly or in combination. The core Gasplasma ...


    By Advanced Plasma Power (APP)

  • UV technology - unique in water disinfection

    Due to its undisputable Success &  Efficiency in destroying Cryptosporidium and Combined Chlorine, The Centers for Disease Control and Prevention Recommend installing UV Systems It has taken many years of testing to convince the pool market that the most reliable and best available option for treating and disinfecting water is through using Ultraviolet (UV) technology. UV systems ...


    By ESCO International (EI)

  • Controlling Hazardous Air Emissions With A Catalytic Oxidizer

    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 well over twenty years 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

  • Uncertainty and variability in enhanced biological phosphorus removal (EBPR) stoichiometry: consequences for process modelling and optimization

    The overall potential for enhanced biological phosphorus removal (EBPR) in the activated sludge process is constrained by the availability of volatile fatty acids (VFAs). The efficiency with which polyphosphate accumulating organisms (PAOs) use these VFAs for P-removal, however, is determined by the stoichiometric ratios governing their anaerobic and aerobic metabolism. While changes in anaerobic ...


    By IWA Publishing

  • Factors affecting the choice of VOC sensor

    VOCs (Volatile Organic Compounds) perform many vital roles as fuels, solvents, cleaners, feedstock, sterilants etc. However, they can be harmful to health and the environment, so it is often necessary to monitor their concentration. By definition, organic compounds contain the element carbon, and exhibit similar chemical properties, which is advantageous from a monitoring perspective. However, ...


    By Alphasense

  • Anaerobic digestion of Organic Fraction of Municipal Solid Waste (OFMSW) in two-phase system

    In view of recovering energy resource from the treatment of Organic Fraction of Municipal Solid Waste (OFMSW), anaerobic digestion of OFMSW prior to aerobic composting as post-treatment was considered. This study aimed to determine the operational characteristics and efficiency of a two-phase system composed of a fed-batch hydrolysis reactor (phase I) and a methanogenic Upflow Anaerobic Sludge ...


    By Inderscience Publishers

  • Validation of USEPA Method 524.2 Using a Stratum PTC, AQUATek 100 Autosampler, and Perkin-Elmer Clarus 600 GC/MS

    The US EPA developed Method 524.2¹, “Measurement of Purgeable Organic Compounds in Water by Capillary Column Gas Chromatography/Mass Spectrometry”, for identifying and measuring purgeable volatile organic compounds (VOC) in surface water, groundwater, and drinking water. Due to the required sensitivity of this method, the use of purge and trap gas chromatography is vital. This ...


    By Teledyne Tekmar

  • World’s deepest DNAPL remediation confidential site, Los Angeles, California

    TRS Group, Inc (TRS) provided Electrical Resistance Heating (ERH) for the remediation of DNAPL at 130-feet belowground surface (ft bgs) at a confidential site located in Los Angeles, CA. This is the world’s deepest remediation of DNAPL using an in situ thermal technology. Total volatile organic compounds (VOCs) of concern include etrachloroethene (PCE), 1,1,1-trichloroethane (TCA), ...


    By TRS Group, Inc.

  • A Citizen`s Guide to Bioremediation

    What is bioremediation? Bioremediation is a treatment process that uses naturally occurring microorganisms (yeast, fungi, or bacteria) to break down, or degrade, hazardous substances into less toxic or nontoxic substances. Microorganisms, just like humans, eat and digest organic substances for nutrients and energy. In chemical terms, 'organic' compounds are those that contain carbon and hydrogen ...

  • Catalytic Oxidizers

    As the full effect of the Federal Clean Air Act (CAA) Amendments continue to impact today’s industry, many different companies will be required to install air pollution control equipment. With more than twenty-five years of proven success, catalytic oxidation continues to be a popular method for controlling volatile organic compound (VOC) emissions. According to the Clean Air Act, any organic ...


    By The CMM Group, LLC

  • Thermal hydrolysis pre-treatment for high solids anaerobic digestion

    The City and County of San Francisco completed a two-year pilot study of pre-treatment processes to mesophilic anaerobic digestion for improved biosolids stabilization and production of biosolids suitable for unrestricted reuse (class A biosolids). The results of this effort will help in the design of the new Solids Handling Facility (SHF) at the 11 m3/s Southeast Water Pollution Control Plant ...


    By Cambi Group AS

  • Dual role of hydrolysis coefficient in modelling of bioreactors

    To the authors' knowledge, there is no published work, relating biodegradation and settlement of municipal solid waste (MSW) in bioreactor landfills together. The present mathematical model is developed to simulate the biodegradation of MSW in anaerobic bioreactor landfills and predict the strength of leachate in terms of volatile fatty acid (VFA). The hydrolysis rate constant (k ...


    By Inderscience Publishers

  • The fate and behaviour of organic micropollutants during wastewater treatment processes: a review

    The fate and behaviour of selected insecticides, herbicides, and polychlorinated biphenyls during primary sedimentation and secondary biological treatment of waste water are evaluated. The physico-chemical properties (chemical structure, aqueous solubility, octanol/water partition coefficient and Henry's Law constant) of these compounds which dictate the extent and mechanism of their removal ...


    By Inderscience Publishers

  • Sewage sludge and waterworks sludge stabilization in sludge treatment reed bed systems

    In this study, results about sludge stabilization in sludge treatment reed bed (STRB) systems in two different systems, Hanningfield STRB 1 (England), treating waterworks sludge, and Stenlille STRB 2 (Denmark), treating surplus activated sludge, are presented. The study mainly focused on the effectiveness of the STRBs systems in stabilizing sludge organic matter; in fact, parameters correlated ...


    By IWA Publishing

  • Dehalogenation

    Introduction: Contaminated soil is screened, processed with a crusher and pug mill, and mixed with reagents. The mixture is heated in a reactor. The dehalogenation process is achieved by either the replacement of the halogen molecules or the decomposition and partial volatilization of the contaminants. Base-catalyzed Decomposition (BCD) Base-catalyzed ...

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