chemical dosing Articles

  • Low cost, low flow chemical dosing

    Hewitt Refractories is one of the country’s leading manufacturers of night storage heater bricks for domestic heating systems, and a range of refractories for domestic appliances. As the quality of the finished product is dependent upon the accurate dosing of the chemical additive into the refractory material, Hewitt Refractories investigated a number of alternative systems. Compared to other ...


    By NOV Mono - Mono Pumps Ltd

  • Verder UK Ltd Chemical Dosing Open Day

    Verder UK Ltd will be hosting an open day allow all customers and those looking for a chemical dosing solution to see first-hand how the Verder Project Team can meet their requirements. ...

  • Phosphate removal without chemical dosing from Virotec

    In this article Simon Tillotson, General Manager at Virotec Europe Limited, explains how the Company’s new innovative Bauxsol™ technology is produced, the nature, characteristics and formulation of the product range and how the product works. He outlines applications for Bauxsol™ technology in the water and environmental sector. Simon concentrates specifically on using Bauxsol™ for phosphate ...


    By Clarity Authoring

  • Microsieving in primary treatment: effect of chemical dosing

    Primary and chemically enhanced primary wastewater treatment with microsieving (disc or drum filtration) was studied at the large pilot scale at seven municipal wastewater treatment plants in Europe. Without chemical dosing, the reduction of suspended solids (SS) was (on average) 50% (20–65%). By introducing chemically enhanced primary treatment and dosing with cationic polymer only, SS ...


    By IWA Publishing

  • Solar powered dosing cube

    WES Ltd has developed a solar powered version of its popular and recently improved dosing CUBE concept. Based around 24V DC versions of the Alldos DDI range of digital dosing pumps, the system provides all of the usual advantages of the dosing CUBE with the added benefit of being able to accurately dose chemicals in locations where no power supply is available and provide further mobility ...


    By WES Ltd / Weschem Ltd

  • Effect of iodine chemical form on thyroid doses during a severe accident

    In most of the accidents that may occur in nuclear reactors, the short-term radiological consequences are expected to be dominated by isotopes of iodine. The assessment of doses resulting from iodine release during a severe reactor accident requires knowledge of the iodine chemical forms and removal mechanisms prior to the release to the environment. In this paper, the arguments concerning iodine ...


    By Inderscience Publishers

  • Relationships between exposure and dose in aquatic toxicity tests for organic chemicals

    There is continuing debate about the merits of exposure‐based toxicity metrics such as median lethal concentration (LC50) versus organism‐based metrics such as Critical Body Residue (CBR) as indicators of chemical toxicity to aquatic organisms. To demonstrate relationships and differences between these two metrics we apply a simple one‐compartment toxicokinetic mass‐balance model for ...


    By John Wiley & Sons, Ltd.

  • Observing the effects of digestion and chemical dosing on the calorific value of sewage sludge

    New legislation being introduced in Europe for the removal of the macronutrients nitrogen and phosphorous is causing the fundamental composition of sludge to change. Nitrogen removal requires longer residence times during activated treatment, and phosphorous removal can involve the supplementation of chemicals such as ferric. In addition, there is increasing pressure to capture energy from sludge ...


    By United Utilities

  • Automated dosing of dry treatment chemical with flexible conveyor improves accuracy, safety of filtration system

    Oberlin Filter Company is a global leader in high pressure flat-bed, liquid-solid filtration systems for demanding applications such as filtering heavy metals and resins from colloidal suspensions. The company's top-of-the-line DMax™ filtration system, which cleans 'impregnation resin' wastewater, requires a dry chemical delivery system that provides more precise, cleaner, and safer dosing than ...


    By Flexicon Corporation

  • Controlling chemical dosing for sulfide mitigation in sewer networks using a hybrid automata control strategy

    Chemicals such as magnesium hydroxide (Mg(OH)2) and iron salts are widely used to control sulfide-induced corrosion in sewer networks composed of interconnected sewer pipe lines and pumping stations. Chemical dosing control is usually non-automatic and based on experience, thus often resulting in sewage reaching the discharge point receiving inadequate or even no chemical dosing. Moreover, ...


    By IWA Publishing

  • A practical approach to determine dose metrics for nanomaterials

    Doses of conventional chemical substances in toxicity studies are traditionally described by administered mass. For deriving toxic doses of nanomaterials, mass and chemical composition alone may not be an adequate description of the dose as particles with the same chemical composition can have completely different toxic mass doses, depending on properties such as particle size. Other dose ...


    By John Wiley & Sons, Ltd.

  • In vitro biotransformation rates in fish liver S9: Effect of dosing techniques

    In vitro biotransformation assays are currently being explored to improve estimates of bioconcentration factors of potentially bioaccumulative organic chemicals in fish. This study compares thin‐film and solvent‐delivery dosing techniques, as well as single vs. multiple chemical dosing for measuring biotransformation rates of selected polycyclic aromatic hydrocarbons in rainbow trout ...


    By John Wiley & Sons, Ltd.

  • 2009 Marie Curie Prize lecture: Linearity at low dose is a religious belief

    Health standards for ionising radiation and genotoxic chemical carcinogens are based on the assumption of a linear response at low doses. Exposures to such agents are therefore harmful regardless of how low the exposure is. The belief in linearity at low dose is also directly tied to and inseparable from two other concepts, that is, such exposures result in cumulative damage and are always ...


    By Inderscience Publishers

  • Chemical blending is the most frequent kind of chemical process

    Chemical blending is one of frequent kind of chemical process that is commonly used in application. The procedure of mixing can potentially save  manufacturers time, labor, inventory, and transportation costs. Organic and inorganic chemicals can be blended. Substance could be blended in liquid form to a variety of pH levels and viscosities. This services ...


    By GlobeCore GmbH

  • Suppression of carcinogenic processes in mice by chronic low dose rate gamma-irradiation

    Effects of low dose rate radiation on the process of carcinogenesis induced by a chemical carcinogen were examined. ICR female mice, 35 or 36 mice for each group, were kept and exposed to 137Cs gamma-rays in the long-term low dose rate irradiation facility at the Central Research Institute of Electric Power Industry at a dose rate of 0.3, 0.96, or 2.5 mGy/h. Thirty-five days ...


    By Inderscience Publishers

  • New animal feed plant relies on proven sera dosing technology

    Top animal feed is a result of the exact application of composition during the production process as well as the use of stateof-the-art technology. The correct planning of the systems engineering is as important as the experience of the staff in the production department. When the Rothkötter animal feed plant was built in Haren-Hüntel, the company relied on sera – a name widely ...


    By sera GmbH

  • Excessive sulfuric acid dosing resulting in irreversible scale formation

    Many consultants in the RO water treatment industry recommend sulfuric acid dosing into the feed water as a safety measure. This case study reviews a situation where acid dosing was used with the intention of improving system performance but resulted in severe sulfate scaling. The difficulties in cleaning sulfate scales are discussed and after numerous lengthy trials, an effective cleaning ...

  • Mono nov dosing pumps offer the right mix for foundry systems

    Integrated Sand Systems Ltd of Walsall carried out extensive trials over a 12 month period before deciding to replace gear and diaphragm pumps, previously incorporated in its Temcon catalyst control system, with Mono progressing cavity pumps. The Temcon system is built into the company’s high speed continuous sand mixers, which blend sand with chemicals and resins, setting hard to form a mould ...


    By NOV Mono - Mono Pumps Ltd

  • The challenge of multiple chemical sensitivity

    Environmental health professionals frequently come across a health-related problem with no clear cause-and-effect relationship. A typical case occurs when a person complains of experiencing symptoms, often in an indoor setting, that may vary from vague to severe. Multiple Chemical Sensitivity (MCS) may be a factor at play in some of these situations. The condition is characterized by persistent ...

  • Low doses of amifostine protect from chromosomal inversions in spleen in vivo when administered after an occupationally relevant X-radiation dose

    Amifostine is a chemical radioprotector known to protect cells from DNA damage and toxicity normally induced by high-dose radiation exposure. Here, we used the sensitive in vivo pKZ1 mouse chromosomal inversion assay to determine the radioprotective effect of different doses of amifostine in the presence and absence of 250 mGy whole-body X-irradiation, the present radiation dose limit for ...


    By Inderscience Publishers

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