packed bed ion exchange Articles

  • Development of a packed-bed reactor for the recovery of metals from industrial wastewaters

    Affinity separation is becoming well established for the purification and recovery of metals from industrial wastewaters. Although the method has been successfully applied on a bench-scale, there is a need for reaction engineering studies to scale-up the process for use in large-scale wastewater purification and recovery of valuable metals. In this study, a pilot-scale packed-bed reactor has been ...


    By Inderscience Publishers

  • Low Energy Biological Nitrogen Removal by Cation Exchange, Thin Film Oxygen Transfer, and Heterotrophic Nitrification in Sequencing-Batch, Packed-Bed Reactors

    Sustainable solutions for biological nitrogen removal (BNtR) in wastewater require new treatment process concepts to lower energy requirements. A novel configuration of six packedbed, flood and drain (PFAD) reactors were used in a pilot study to remove nitrogen from a manufactured wastewater comprised of urea, cheese whey, and well water. The reactors operated in a sequencing-batch manner in ...

  • Loading of an Anaerobic Packed Bed for Treatment of a High Strength Gray Water

    ABSTRACTIn preparation of long-duration manned space flight, biological treatment systems have been evaluated for mission specific waste streams consisting of a high-strength gray water. The purpose of the work was to determine the appropriateness of using nitrification and denitrification to treat the urine-humidity condensate waste stream and to determine the optimal loading rate for the bench ...

  • The productive environmental laboratory: BSK Labs boosts efficiency with Metrohm IC

    BSK Labs runs a number of environmental laboratories and service centers along the west coast of the US. A total of 70 employees – including microbiologists, chemists, lab technicians, and support staff – make sure that the 200 to 350 samples that come in every week are analyzed. BSK Labs specializes in potable water chemistry, ground water monitoring, storm water runoff, solid waste ...


    By Metrohm AG

  • Removal of NO3 from groundwater by PP-g-AA-Am non-woven fabric using fixed-bed column reactors

    This study investigated the effect of PP-g-AA-AM non-woven fabric on the removal of nitrate nitrogen from groundwater. The breakthrough time was 1.5–2.6, 2.5–5.5, and 6.2–12.2 h for a superficial velocity of 2.0, 1.0, and 0.5 cm/s, respectively, for the nitrate nitrogen concentration in groundwater to satisfy the safe standard for drinking of 10 mg/L (as per the Ministry of ...


    By IWA Publishing

  • Revolutionary Design of Demineralizer Plant for the Process Industry

    Introduction Although counter-currently regenerated ion exchange demineralizer (DM) plants have been widely available since the 1960’s, the past decade has seen the introduction of a new generation of demineralizer designs in North America and Europe. Promoted by several of the major resin manufacturers, these include UPCORE from Dow Chemical, PUROPACK from Purolite and AMBERPACK from ...


    By Eco-Tec Inc.

  • Case study: telecommunication component manufacturing

    JMC Tools, formerly ADC Solitra Inc., offers integrated RF solutions for the telecommunications industry worldwide. The product range of the company covers high frequency components and modules for cellular and PCS systems, both analogue and digital. The company has close links with the world’s leading OEM manufacturers of cellular phones and infrastructure and has a strong ...


    By Watman Ltd.

  • Micro Media Filtration Proving Effective in Produced Water Softening Systems

    Having an eff ective, durable pretreatment system in advance of ion exchange produced-water softening systems is the fi rst, most critical line of defense – ensuring smooth, more troublefree performance downstream. It’s especially true when dealing with today’s ion exchange technologies, which require TSS (total suspended solids) of 0.1-0.5 mg/L and turbidities of 0.1-1 NTU ...


    By Eco-Tec Inc.

  • Effectiveness of continuous removal of heat stable salts from contaminated amine scrubbing solutions

    Amine scrubbing solutions used for gas treatment at refineries, chemical, sulfur and gas processing plants remove hydrogen sulfide and carbon dioxide from gas streams. One of the problems with the amine solutions is the gradual accumulation of byproduct contaminants called heat stable salts (HSS). Increased HSS concentration in the amine loop leads to corrosion-related maintenance problems, ...


    By Eco-Tec Inc.

  • Fluoride sorption using morringa indica –based activated carbon

    Fluoride is an important micro nutrient for the production and maintenance of healthy bones and teeth. Although a certain amount of fluoride gives good protection against dental decay, excess intake of fluoride ions cause dental fluorosis. When the concentration of fluoride is more than 4 mg/L it causes softening of bones, ossification of tendons and ligaments and neurological damage in severe ...


    By University of Tehran

  • Water Innovations Facility Upgrade

    A few facility upgrades at Water Innovations worth mentioning this quarter at our San Diego 10,000 square foot facility. As we continue to hire a growing workforce across departments, and several years of our continued investment and growth. We have invested in an Electrostatic Precipitator, to use in our in-house paint both. This is a device that removes suspended dust particles from a ...


    By Water Innovations, Inc

  • Crossflow Membrane Filtration High-Purity Water Systems

    INTRODUCTION As the electronics industry continues to provide us with such products as high resolution television, notebook size portable computers and cars with automatic navigation systems, it becomes necessary to produce semiconductors with finer device geometries to allow for efficient placement of more circuits per a given area. This requires increased control of a semiconductor's material ...

  • Case study - Doe Run Peru – Improving productivity with environmental responsibility

    Doe Run Peru aims to become a preferred global provider of premium metals and services, while at the same time working to operate in a socially and environmentally responsible way. The mining and metals company employs roughly 4,000 people at its operations in Peru’s central Andes. The company has run the La Oroya metallurgical complex since 1997 and the Cobriza mine in the Huancavelica ...


    By Beltran Technologies, Inc.

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