biofilter Articles

  • Biofilter

    Biofiltration is a pollution control technique using living material to capture and biologically degrade process pollutants. Common uses include processing waste water, capturing harmful chemicals or silt ...


    By IWA Publishing

  • Biofilter Applications in the Coatings Industry

    Soaring energy costs and the high cost of ‘end-of-pipe’ pollution control equipment has caused companies and regulatory agencies to re-evaluate ‘unconventional’ means of achieving VOC and HAP emissions control. The coatings industry is an excellent candidate for alternative, unconventional controls, as VOC and HAP reductions have not been as strident as has been the case in many other industries. ...


  • Biofilters vs Asdorption

    In the last three decades biological technologies have emerged as a sustainable and economically-viable alternative compared to traditional techniques like adsorption/absorption for purifying gases. They were well-received initially in the industry and interesting products with good results were carried out for several years. However, owing to a series of reasons that will be detailed in this ...


    By Bioconservacion SA

  • Longer Life For Biofilters

    Biofilters are the odor control system of choice at composting facilities. Despite similar capital costs, the biofilters are generally less costly to operate than chemical scrubbers. The key to keeping operating costs in check, however, is to get the maximum use out of the biofilter media, thus avoiding the time and money needed to do media replacements. Allen Boyette, senior engineer and manager ...


    By BioCycle Magazine

  • Biofilter Applications in the Coatings Industry.

    Soaring energy costs and the high cost of ‘end-of-pipe’ pollution control equipment has caused companies and regulatory agencies to re-evaluate ‘unconventional’ means of achieving VOC and HAP emissions control. The coatings industry is an excellent candidate for alternative, unconventional controls, as VOC and HAP reductions have not been as strident as has been the case in many other industries. ...


  • Biofilter Removal of VOCs and Toxics from Airborne Emissions

    Abstract Sewage treatment plants can emit significant quantities of volatile organic compounds (VOCs) and toxic air contaminants, but emission control by conventional methods has been difficult to achieve. The biofilter technology developed in a previous contract can satisfactorily control emissions from these plants and possibly from other sources of high-volume, low-concentration emissions ...


  • High VOC Loadings in Biofilters - Petroleum and Industrial Applications

    ABSTRACTMore cost effective alternate technologies are needed to meet the demands of existing and upcoming Federal air regulations. Bio-Reaction Industries, Inc. (BRI) has developed a patented, modular, high-rate, vapor-phase biofilter that has provided such a solution for a major oil company for the past four years. This compact system has adsorbed and digested high VOC surge concentrations ...


  • Report claims biofilters provide operating costs advantages

    As much as several million dollars over a 10-year period When determining the optimum HAP (hazardous air pollutant) and/or VOC (volatile organic compound) controls, it is imperative to assess all available options with respect to the existing and future operations at each mill. The correct choice for one application may not be best for all; and as operating conditions, raw materials, resins, ...


  • A synthetic biofilter media for ammonia (NH3) removal

    In this work, a patented biofilter media is used in treating air contaminated with ammonia (NH3). The data shows up to 200 ppm of NH3 can be removed with over 93% removal efficiency at 30 s Empty Bed Residence Time (EBRT). At the start–up conditions, the results also indicated that the humidifier can be ...


    By Inderscience Publishers

  • Pilot-Scale Biofilter Test for Treating Zimpro Odors

    The thermal sludge conditioning process of U.S. Filter/Zimpro Corporation, Rothschild, Wisconsin (Zimpro process) is primarily used to improve dewatering characteristics of the waste sludge. The process entails a partial breakdown through oxidation and hydrolysis of complex, high molecular weight organic compounds, such as, proteins, fibers, carbohydrates, and fats. The partial breakdown of ...


    By PRD Tech, Inc.

  • Review of Biofiltration - Effect of Support Media on Biofilter Performance

    Technologies for removal of hazardous pollutants from air have gained increased importance following the 1990 Clean Air Act Amendments (CAAA). Biofiltration is an emerging and attractive technology for the removal of volatile organic chemicals (VOCs) present at low concentrations in air. Traditional VOC removal technologies involve physical or chemical processes such as adsorption, condensation, ...


    By PRD Tech, Inc.

  • A High Performance Biofilter for Toluene Emission Control

    A high performance biofilter was designed at the Université de Sherbrooke in Québec. This laboratory-scale biofilter was used for the treatment of gas streams polluted with toluene present in low or high concentration. A maximum elimination capacity of 135 g.m -3 .h -1 was achieved, and no clogging of the biofilter was observed during the experimental period. The performance of the cleaning ...


  • Methane oxidation in water-spreading and compost biofilters

    This study evaluated two biofilter designs to mitigate methane emissions from landfill vents. Water-spreading biofilters were designed to use the capillarity of coarse sand overlain by a finer sand to increase the active depth for methane oxidation. Compost biofilters consisted of 238-L barrels containing a 1: 1 mixture (by volume) of compost to expanded polystyrene pellets. Two replicates of ...


    By SAGE Publications

  • Biofilm Growth-Percolation Models and Channeling in Biofilter Clogging

    Biomass accumulation is a load-limiting factor in the operation of biofilters used for air pollution control. As the biofilm thickens, portions at the base are no longer exposed to contaminants and oxygen and, thus, provide no treatment. Smaller pores are filled with biomass so that air no longer flows into them. As airflow paths are restricted, air may be prevented from reaching some pores even ...

  • Preliminary stabilisation of stormwater biofilters and loss of filter material

    Stabilisation affects performance of stormwater biofilters operating under intermittent wetting and drying, mainly due to wash-off of filter material. Understanding the dynamics of solids wash-off is crucial in designing stormwater biofilters. The current study analysed the dynamics of solids wash-off in stormwater biofilters and quantified the loss of solids from the filter. Four Perspex™ ...


    By IWA Publishing

  • A comparison of an organic biofilter and an inorganic biofilter for the treatment of residual odors emanating from a biosolids de-watering facility

    ABSTRACT: The following paper is a comparison of an organic media biofilter and a synthetic media biofilter for the treatment of residual odors emanating from the operation of a biosolids dewatering and truck loading system at the City of Toronto's Ashbridges Bay Treatment Plant. The system compared was an in-ground, header/lateral system operated in a forced draft, up flow, ...


    By Biorem Technologies Inc.

  • Study on removal of cadmium from water environment by adsorption on gac, bac and biofilter

    The Contamination of water by toxic heavy metals is a world-wide environmental problem. Discharges containing Cadmium, in particular, are strictly controlled due to the highly toxic nature of this element and its tendency to accumulate in the tissues of living organisms.  Low concentration (below 5 mg/L) of Cadmium is difficult to treat economically using chemical precipitation methodologies.  ...


  • High VOC Loadings in Biofilters - Petroleum and Industrial Applications (PDF)

    More cost effective alternate technologies are needed to meet the demands of existing and upcoming Federal air regulations. Bio-Reaction Industries, Inc. (BRI) has developed a patented, modular, high-rate, vapor-phase biofilter that has provided such a solution for a major oil company for the past four years. This compact system has adsorbed and digested high VOC surge concentrations (over 90,000 ...


  • Characteristics of benzene, toluene and xylene gas removal by a biofilter using scoria

    The biodegradation experiments of Benzene, Toluene and Xylene (BTX) by bacillus culture were carried out. In batch biodegradation experiments of binary mixtures, benzene degradation was inhibited by the presence of either toluene or xylene and toluene degradation was inhibited by the presence of either benzene or xylene. However, xylene degradation was stimulated when xylene was present in a ...


    By Inderscience Publishers

  • Results of Full-Scale Installation and Comparison of Biofilter Operation (PDF)

    ABSTRACTBio·Reaction Industries LLC. (BRI) has completed a two-phase project for the design, testing and installation of a biofiltration unit to degrade volatile organic compounds (VOCs) including benzene, toluene, xylenes, ethyl benzene, hexanes, MEK, MIBK, acetone and certain alcohols to reduce emissions from a paint manufacturing facility in Eugene, Oregon. The initial biofilter installed was ...


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