WATER TREATMENT SOLUTIONS Increasing the efficiency and stability of water treatment processes

SET A FIRM FOUNDATION FOR SECURE COST-EFFICIENT WATER TREATMENT... For the water treatment industry, quality is non-negotiable. Consistently demonstrating that regulatory standards are met, while at the same time driving down treatment costs, provides the stimulus for continuous process improvement. Plant stability is the defining operational goal and a primary driver for the adoption of on-line analytical tools. Complementary aims are to: ·· Confidently meet quality targets even when raw water quality changes sharply and rapidly Intake pumping station Micro strainer Raw water pumping station...

...WITH ONLINE ZETA POTENTIAL MEASUREMENT The Zetasizer WT continuously measures zeta potential, a parameter that directly quantifies the likelihood of coagulation. Zeta potential is a well-established, proven parameter for assessing suspension stability and is distinctly different from current density measurements as reported by streaming current meters (SCMs). The zeta potential of raw water is typically negative, in the region of -25 mV to -15 mV. Adding coagulants neutralizes this negative charge, moving zeta potential towards zero and ultimately into the positive range. Flocculation is typically...

Traditional techniques used for monitoring particle charge in coagulation and sedimentation processes include the jar test and in some cases SCMs. These techniques have a number of limitations for efficient charge neutralization and clarification control. Zeta potential measurement directly addresses the issues associated with both techniques. It is fully automated and complete in just a few minutes. Measurements are highly reproducible and repeatable, and sufficiently sensitive to detect a developing plant problem, before it impacts operation. The data delivered reveals whether coagulant addition...

...WHEN YOU CAN CONTINOUSLY AND DIRECTLY MONITOR IT? The Zetasizer WT is an automated sensor for the on-line measurement of zeta potential. An aliquot of water is captured as it passes through the Zetasizer WT and an electric field is applied. This field influences the mobility of the particles which is dependent on the surface charge on the particles themselves. The mobility is analyzed using Electrophoretic Light Scattering (ELS), which is an absolute technique eliminating the need for calibration. A NIST traceable standard is available for verification if required. Electrical double layer...

TRANSLATE MULTIPLE BENEFITS... With a Zetasizer WT in place, dosing can be controlled to maintain optimum conditions for coagulation and sedimentation at all times. By continuously tracking the zeta potential of water during the coagulation process the operator can instantly see and respond to changes in the charge neutralization process to achieve stable operation. Fully automated control becomes feasible. Automated measurement and improved dosage control delivers valuable benefits that translate directly into confident, stable plant operation to regulatory standards, whilst reducing chemical...

Case study: Wemlinger Water Treatment Plant, owned by Aurora Water. This company operates three facilities for water treatment in the Denver-Aurora area and has a reputation for US industry leadership. An early access online zeta potential system was installed at Wemlinger in 2012-2013. Since installation the sensor has: • Recorded data that are in close agreement with laboratory measurements • Been welcomed by the operational team as useful and practical • Proven more sensitive and informative than alternatives such as an SCM • Demonstrated a sharp response to process changes • Enabled proactive...

WHY CHOOSE MALVERN PANALYTICAL? We are global leaders in materials characterization, creating superior, customer-focused solutions and services which supply tangible economic impact through chemical, physical and structural analysis. Our aim is to help you develop better quality products and get them to market faster. Our solutions support excellence in research, and help maximize productivity and process efficiency. Malvern Panalytical is part of Spectris, the productivity-enhancing instrumentation and controls company. www.spectris.com SERVICE & SUPPORT Malvern Panalytical provides the global...