chemical dosing Articles

  • Water Treatment Optimization - Case Study

    Drinking water treatment in North America has stringent requirements for effluent water quality, with a great amount of attention being drawn to the presence of hazardous disinfection by-products (DBPs) persisting through water distribution systems. The operation of water treatment plants involves addition of various mixing agents to help with coagulation and settling of organics in the raw water ...


    By MANTECH

  • Measuring CO2 to Optimise the Bulk Storage of Food

    Meeting the food requirements of a growing global population is becoming increasingly difficult. Despite the need for additional food, it is estimated that 50-60% of grain is lost after harvesting, at a cost of about $1 trillion per year.1 One of the major reasons for lost grain is spoilage due to mould or insect infestation during storage.2 To provide a ...


    By Edinburgh Instruments Ltd

  • 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 ...

  • 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

  • Chemical dosing and blending - the role of precision actuators

    Overview Chemical dosing is the introduction of a measured quantity of a chemical into a process fluid so that a chemical reaction occurs in the process fluid or a particular blend of fluids is achieved. ...


    By Rotork

  • 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

  • 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

  • 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.

  • Chemically enhancing primary clarifiers: model-based development of a dosing controller and full-scale implementation

    Chemically enhanced primary treatment (CEPT) can be used to mitigate the adverse effect of wet weather flow on wastewater treatment processes. In particular, it can reduce the particulate pollution load to subsequent secondary unit processes, such as biofiltration, which may suffer from clogging by an overload of particulate matter. In this paper, a simple primary clarifier model able to take ...


    By IWA Publishing

  • 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

  • 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

  • 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.

  • 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

  • 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.

  • 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

  • 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 ...

  • 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 ...

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