Malvern Panalytical has been developing and supporting the use of Zeta Potential for the monitoring, control and optimization of coagulant dosage in water treatment plants for over ten years. This enables quantitative results to be used in place of rudimentary and subjective jar testing or similar less reliable methods. As a first principles technique, Zeta Potential promotes confidence in its use as a key indicator of coagulant dose effectiveness, and offers  continuous real-time data to the SCADA operations team. Operators and plant engineers are then able to clearly stay a step ahead of seasonal or sudden storm water run-off effects that require swift action to keep the process running efficiently. Bench-top lab or automated online solutions make this a technology suitable for every surface water treatment plant, from the smallest rural plants to the largest high-capacity urban facilities.

Malvern Panalytical is a leader in materials characterization, creating expert solutions for the challenges associated with maximizing productivity, developing better quality products and getting them to market faster. We provide superior, customer-focused solutions and services which deliver tangible economic impact through chemical, physical and structural analysis of materials.  

Our products reflect Malvern Panalytical’s drive to exploit the latest technological innovations and our commitment to maximizing the potential of established techniques. They are used by both industry and academia, in sectors ranging from pharmaceuticals and biopharmaceuticals to bulk chemicals, cement, plastics and polymers, energy and the environment.   

Malvern Panalytical systems are used to measure particle size, particle shape, zeta potential, protein charge, molecular weight, mass, size and conformation, crystal structure and phase identification, mineral identification, elemental analysis, nanoparticle size and count, and for chemical identification, advancing the understanding of materials across many different industries and applications.   

Headquartered in Malvern, UK and Almelo, The Netherlands’ Malvern Panalytical has additionally research and manufacturing locations in USA, Canada, and China, as well as applications laboratories around the world.   



The Zetasizer WT is a fully automated online sensor for continuous zeta potential monitoring that enables the proactive, precise, and cost-efficient control of charge neutralization processes. By reducing coagulant and sludge disposal costs it delivers a healthy return on investment whilst reducing vulnerability to sharp changes in incoming water quality.


Malvern Panalytical

117 Flanders Road

Westborough, MA 01581


Phone: 401-623-1800

Contact: Jeff DeNigris



  • This talk is on coagulant dose management and focuses on the challenges facing those watershed areas impacted by wildfires. Keeping up with the pre-treatment process can be difficult and changes to source water run-off may last for some time. Several factors impacting water treatment during and after wildfires are discussed.

  • Gregg McLeod, a 30-year veteran in the water/waste water industry and currently a Senior Process Specialist with HDR, spent a few minutes discussing his typical approach to testing coagulant affect on floc formation and how that enables better dose control. His experience with various methods to understand dose and how to control it presents a unique view on how best to manage this critical step in the overall water treatment process. 

  • Surface water treatment, water remediation and waste water treatment are critical issues in providing safe drinking water. Control of turbidity and removal of NOM remains one of the main challenges facing water utilities. Control of the flocculation process and adjustment of coagulant dose during the course of water and waste water treatment is often a challenging step in the water treatment process.

  • Gary Fox from Tacoma Water talks about the value that the zeta potential measurement has added to plant operations both on-line and in the lab.  By installing the Zetasizer WT, from Malvern Instruments, to the water treatment process, you can make significant savings on chemicals. At Aurora Water in Colorado, United States, use of the on-line zeta potential system decreased coagulant costs by 17%, while also eliminating the needs for a rapid mixer.