Water Chemicals Dosing Articles

  • What is a Syringe Pump?

    A syringe pump is a type of infusion pump originally developed to help administer drugs to patients in a controlled manner. Early attempts to construct infusion pumps were made in the 19th century. However, the first infusion device was introduced in the 1950s to be used in chemotherapy. In the 1970s, the development of ambulatory infusion technology enabled the pumps to be used in research; ...


    By Chemyx Inc

  • Made to Bear Extreme Conditions

    Working below sea level, 24 hours a day, 7 days a week, subsea pumps are high-power and high-speed rotating equipment that perform under extreme conditions. Every single part of the pump has to be designed to be extremely reliable and must be tested intensively. The newly developed tilting-pad bearings offer advantages that can be used in other areas of application as well. Certain ...


    By Sulzer Management Ltd

  • Common Ion Exchange System Problems and How to Fix Them

    Ion exchange (IX) systems can be an efficient solution for various demineralization, purification, and wastewater treatment needs. In fact, IX systems deliver several advantages over chemical treatment, as they generally require less space, ...


    By SAMCO Technologies, Inc.

  • Modular Reed Bed - Case Study

    The modular reed bed is an award winning, innovative solution for small footprint tertiary treatment. This case study follows the implementation of this technology on a small and remote sewage works which was overloaded during high rainfall. This project saved 91% in costs for the effected utility (which had a budget of £300k for the project) and provided a reduced health and safety risk ...


    By Greener Waste Technology

  • Dewatering optimization with in-line and real-time measurement of polymer: results from full-scale treatment plants

    Full-scale testing was carried out at two wastewater treatment plants to determine whether residual polymer concentration, measured by filtrate and centrate absorbance at 191 nm, can be used to identify the optimum polymer dose and achieve in-line and real-time dewatering optimization. The first plant uses high speed centrifuges and the second plant uses belt filter presses for dewatering. ...


    By IWA Publishing

  • Chlorine Dioxide – dispelling the myths

    The internet is an incredibly useful research tool. It allows us to source and share information instantaneously. Unfortunately, this means that myths and misconceptions can spread very quickly and obscure the truth. In this post, we aim to tackle some of the myths that surround chlorine dioxide, and how this differs from our chlorine dioxide based product CleanOxide. Myth 1: Pure chlorine ...


    By NW Solutions

  • Atomic Layer Etching – Changing the Art of the Possible

    The society of vacuum coaters (SVC) deserves to be better known. It was founded in 1957 during a surge in the use of vacuum coating techniques such as sputtering and evaporation. The techniques go back a very long way: that man Edison filed a patent for coating phonograph cylinders in 1892 (It will never catch on). Did you know that the shiny surface inside your crisp packet is a vacuum ...


    By Oxford Instruments plc

  • Stop the hit and miss in coagulation-flocculation: AppliTek’s charge density analyzer to reduce polymer dosing

    Specialist manufacturer AppliTek NV has the pleasure to announce its latest analytical solution, called EZ-Charge®, for reducing the potentially skyrocketing costs that come with controlling the amount of suspended solids in waste water treatment. The novel water analyzer has been developed in cooperation with AQRatio (Germany), a company specialized in sewage sludge analysis and control. ...


    By AppliTek NV

  • Advancements in Scaling Calculations and an in depth look at Antiscalant dosing for stressed waters and high recovery systems

    Abstract Over the past few decades the Reverse Osmosis (RO) industry has observed an increase in applications in challenging waters. Water sources that were never considered suitable for RO are now commonplace, including municipal waste streams, industrial waste, and even mining waste. Furthermore, regulatory restrictions, environmental obligations, solid waste expenses, and water supply ...


    By Avista Technologies

  • Raw water clarification by flotation with microbubbles and nanobubbles generated with a multiphase pump

    Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s−1 and an ...


    By IWA Publishing

  • What Is Zero Liquid Discharge and How Does It Work?

    Not every industrial facility that produces wastewater will require zero liquid discharge (ZLD). It is usually looked to as a last resort because it can be a complex process that requires a high initial investment. If a facility is located on a site that has severe water scarcity issues and/or astronomical discharge fees, it might be ...


    By SAMCO Technologies, Inc.

  • Evaluation of DBPs formation from SMPs exposed to chlorine, chloramine and ozone

    Soluble microbial products (SMPs) are an important group of components in wastewater effluents. In this study, the formation of disinfection by-products (DBPs), including trihalomethanes (THMs), haloacetic acids (HAAs), chlorinated solvents (CSs), haloketones (HKs), haloacetonitriles (HANs) and trichloronitromethane (TCNM) (chloropicrin), from SMPs during chlorination, chloramination and ...


    By IWA Publishing

  • Case study - Algae control in fire reservoir Häagen Dasz production facility

    A 77 meter rainwater reservoir for fire extinguishing purposes was completely covered with filamentous green algae. The green filamentous algae clogs regularly filters located before the jockey pumps.  The Challenge: Control Green Algae and Lower the Use of Oxygen Peroxide Located in Tilloy-lès Mofflaines, France, the 77 meter long rainwater reservoir for fire ...


    By LG Sonic

  • Adsorption of lead (II) ions onto novel cassava starch 5-choloromethyl-8-hydroxyquinoline polymer from an aqueous medium

    Adsorption of lead (II) ions onto cassava starch 5-choloromethyl-8-hydroxyquinoline polymer (CSCMQ) was investigated with the variation in the parameters of pH, contact time, lead (II) ions concentration, temperature and the adsorbent dose. The Langmuir and Freundlich models have been applied. CSCMQ was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. ...


    By IWA Publishing

  • Reclaimed Municipal or Industrial Wastewater for Power Plant Cooling & Boiler Feed Make-Up Water

    For centuries, water was considered a commodity product and used with little or no restriction. In today’s modern society, water is now being considered a precious resource and considerable effort is put into protecting, recycling, and restricting its use freely. State and Federal agencies have put in place guidelines and regulations restricting its use, especially for industrial use. ...

  • Improvement of multi-parameter-based feed-forward coagulant dosing control systems with feed-back functionalities

    Coagulant dosing control in drinking and wastewater treatment plants (WWTPs) is often limited to flow proportional concepts. The advanced multi-parameter-based dosing control systems have significantly reduced coagulant consumption and improved outlet qualities. Due to the long retention time in separation stages, these models are mostly based on feed-forward (FF) models. This paper ...


    By IWA Publishing

  • 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

  • Liquid ring pumps are a picture of reliability - Case Study

    "This Samson pump has given us great and reliable service for many, many years," says Brian Larsen with a smile as he gives the pump an affectionate pat. The pump is from 2001 and runs effortlessly day in and day out. Not once has the pump had to be removed from the vacuum tanker for repairs or the like. "For our work, Samson's liquid ring pumps are the natural choice. Samson's products are the ...


    By Samson Pumps A/S

  • The design of static mixer heat transfer equipment for adhesives, sealants, resins and polymers.

    The fluids handled within the adhesives and sealant industries are amongst the most difficult to handle of any in the main process industries globally. The characteristics which make them particularly difficult to handle include: High viscosities (typically 1-2000 Pa.s, or 1000 to 2 million cP). Often non-Newtonian (viscosity is not constant and varies with shear rate). Some ...


    By National Oilwell Varco

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