pre-packed column Articles

  • Scale-up of a packed bed column for wastewater treatment

    After checking the success of the biosorption process to remove heavy metals from wastewater using olive tree pruning as a cheap biosorbent in the laboratory scale, the scale-up is necessary to progress towards industrial applications chance. The aim of this work was the study of the effect of scale-up in the process of biosorption of Pb(II) with olive tree pruning in a packed bed column. ...


    By IWA Publishing

  • Influence of liquid redistributors on the mass-transfer efficiency of packed columns

    In industrial mass-transfer columns liquid distributors and redistributors are used to mix the liquid after a certain random packing or structured packing height before it is applied to the next bed. The purpose of this is to counter a possible deterioration of the mass-transfer efficiency along the height of the column as a result of wall flow tendency of the liquid or to minimize the ...


    By Raschig USA Inc.

  • Absorption of Sulphur Dioxide with Sodium Hydroxide Solution in Packed Columns

    1 Introduction "Die absorption of sulphur dioxide from effluent gases by using aqueous sodium hydroxide solution as a solvent has become established practice in industry where a high degree of purity of the effluent gases must be ensured in a reliable manner. Although it has long been known that it is basically possible to clean effluent gases containing sulphur dioxide effectively by using ...


    By Raschig USA Inc.

  • Biosorption of lead by the immobilised fungus Phanerochaete chrysosporium in a packed bed column

    Biosorption of lead by immobilised Phanerochaete chrysosporium over two successive cycles of sorption-desorption was investigated in a continuously operated packed bed column. The breakthrough curves in each sorption cycle were measured as a function of different bed depths in the column at an inlet lead concentration of 40 mg/L. The values of various breakthrough parameters obtained in the study ...


    By Inderscience Publishers

  • Analyze Trace Amounts of Solvents in Water Using Packed Column GC

    Glass or stainless steel columns containing 80/120 Carbopack B/3% SP-1500 packing can be used to analyze water-based samples for ppm to low percentage levels of many organic compounds. This bulletin describes minimum detection limits and maximum capacity of these columns, adsorption and memory effects, and other factors that affect component quantitation. Problems are defined that might arise ...


    By MilliporeSigma

  • Denitrification of nitrate-contaminated groundwater in columns packed with PHBV and ceramsites for application as a permeable reactive barrier

    Groundwater contamination via nitrate leaching has been observed in many countries. The denitrification performance of a poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV)–ceramsite-based reactive barrier system was evaluated in continuous upflow bioreactors. Artificial groundwater spiked with nitrate (44.75–57.25 mg NO3−-N/L) was tested under different hydraulic retention times (HRT; 5.2 ...


    By IWA Publishing

  • Analyses of Permanent Gases, Light Hydrocarbons, and Light Polar Compounds, Using Packed Column GC

    GC columns containing Carboxen-1000 packing separate mixtures of permanent gases (nitrogen, hydrogen, oxygen/argon, carbon monoxide, carbon dioxide) and C1-C3 light hydrocarbons (methane, acetylene, ethylene, ethane, propyne, propylene, and propane). A 15’ x 1/8” column will separate the permanent gases and C1 and C2 hydrocarbons in less than 25 minutes. A 2’ x 1/8” column ...


    By MilliporeSigma

  • Continuous phosphorus removal from water by physicochemical method using zero valent iron packed column

    Excessive phosphorus in aquatic systems causes algal bloom resulting in eutrophication. To treat wastewater including effluent of wastewater treatment plant containing various amounts of phosphorus, a series of continuous experiments on removal of phosphorus from water were performed by using an electrochemical method. The spherical type of zero valent iron (ZVI) and silica sand were packed at ...


    By IWA Publishing

  • The impact of tower internals on column performance

    Full scale testing and analysis of operation demonstrate the importance of tower internals on the performance of mass transfer packings Fractionation Research Inc. (FRI) is the most modern independent test institute in the world for performing tray, random packing, and structured packing tests under rectification conditions on an industrial scale test column (see Figure 1). In 1998, Raschig ...


    By Raschig USA Inc.

  • Research on mass transfer columns: passe?

    Since university research on mass transfer columns has decreased significantly in recent years, it is discussed whether the current knowledge of mass transfer technology for trays, packing materials, and column internals is sufficient to design energy- and cost-efficient systems. Points of view are described that have not yet been clarified from an industrial position and should play an important ...


    By Raschig USA Inc.

  • A new packing structure with innovative advantages

    Abstract The Raschig Super-Pak is a new geometric packing design which through an innovative structure, has three major advantages over other high-performance packing: lower pressure drop, higher capacities, and better separation efficiency. The performance data measured at the Separations Research Program (SRP) at the University of Texas at Austin are presented and evaluated in ...


    By Raschig USA Inc.

  • Impact of pre-treatment technologies on soil aquifer treatment

    This study investigates the impact of pre-treatment options on the performances of soil columns simulating soil aquifer treatment (SAT). For this purpose a conventional activated sludge (CAS) process, a membrane bioreactor (MBR) and vertical flow reed beds were used as single units or in combination before SAT. The influent and effluent from each treatment train were monitored over three ...


    By IWA Publishing

  • Biofiltration as pre-treatment to water harvesting and recycling

    This paper presents the results of the long term biofilter experiments conducted with raw stormwater collected from a canal at Carlton, in Sydney. Anthracite and granular activated carbon (GAC) were used as a single filter media in biofilter columns. Media heights of 75 and 40 cm were used. The filter columns were operated at filtration velocities of 0.12 and 0.25 m/h. The removal efficiency for ...


    By IWA Publishing

  • Breakthrough studies with mono-, binary- and ternary-ion systems comprised of Fe(II), F and As(III) using river sand packed columns for groundwater treatment

    Groundwater in Assam, India, contains excessive amounts of arsenic (As(III)), fluoride (F−) and iron (Fe(II)). The rural and semi-urban population of Assam uses indigenous iron filters fabricated using processed sand (PS) as one of the chief constituents to reduce Fe(II) concentration; however, no efforts have been made to reduce As(III) or F− concentrations before use. ...


    By IWA Publishing

  • Removal of sulphur dioxide from exhaust gases using hazardous and structured packing

    The expulsion of sulphur dioxide from hydrocarbon combustion can reach levels higher than accepted by the normative. In order to evaluate the efficiency of separation of SO2 by different packing systems constructed with materials such as metals or ceramics, the mass transfer and hydrodynamic parameters were evaluated. With the use of mass transfer model, the ININ packing showed higher ...


    By Inderscience Publishers

  • Modelling GAC adsorption of biologically pre-treated process water from hydrothermal carbonization

    Granular-activated carbon (GAC) adsorption of biologically pre-treated process waters from hydrothermal carbonization (HTC) of different materials was investigated. Overall, isotherms showed that most of the dissolved organic substances are strongly adsorbable while the non-adsorbable fractions are small. The equilibrium data were modelled by using five fictive components to represent the ...


    By IWA Publishing

  • Active Mixing in a 4MG Pre-Cast Concrete GST - Case study

    Eliminate Stratification and improve overall water quality. Topics: tank mixing, chloramine, nitrification, stratification, taste, odor, inconsistent disinfectant residuals ...


    By Medora Corporation

  • Transport of Edible Oil Emulsions in Clayey Sands: One-Dimensional Column Results and Model Development

    Abstract: The transport and retention of a soybean oil-in-water emulsion was evaluated in laboratory columns packed with a medium to fine clayey sand amended with varying amounts of kaolinite. Results from these experiments demonstrated that appropriately prepared soybean oil-in-water emulsions can be distributed in clayey sand at least 80 cm away from injection point. Kaolinite addition to the ...


    By EOS Remediation, LLC

  • How to Surpass Conventional and High Capacity Structured Packings with Raschig Super-Pak

    Abstract: Raschig Super-Pak is a novel development in structured packing product technology that is fundamentally different to the well known corrugated perforated or non-perforated, textured sheet metal structured packings. It comprises of a systematic sequence of smooth sinusoidal waves above and below the plain of the metal sheet. Tests at the Ruhr University of Bochum showed that the new open ...


    By Raschig USA Inc.

  • Pulp & Paper: Ammonia Emergency Plan calls on Packed Tower Case Study

    A few years ago Union Camp turned a corner. Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands. At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively ...


    By CR Clean Air Group, LLC

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