Malvern Instruments

Zeta Potential Measurement Solutions for the Water Industry


Malvern Instruments provides water treatment solutions that analyse the qualities of dispersed systems, including industrial bulk powders, high-concentration slurries, and aerosols and sprays.

Zeta potential measurement solutions for water treatment

Malvern offers automated, easy-to-use online and laboratory systems to measure the zeta potential of water samples.

These systems can be used to perform various tasks, such as:

  • Help maintain stable plant operation to required standards by enabling an effective, timely response to changes in water quality
  • Evaluate how much coagulant is required to optimise charge neutralisation
  • Eliminate coagulant over-dosing, reducing coagulant and sludge disposal costs

Water filtration monitoring

Pre-treated water typically contains organic, inorganic and bacterial contaminants.

Treatment begins with clarification, consisting of a coagulation, sedimentation and filtration process, which removes suspended particulates.

Stability of floc formation is critical during this process and it is controlled by neutralizing the electrostatic charge of various contaminants by using oppositely charged coagulants.

One of the known parameters that affect stability, zeta potential measures the level of electrostatic repulsion or charge between particles. It provides further details on the causes of aggregation, dispersion or flocculation.

Monitoring change with zeta potential measurements in water treatments helps lower the cost of chemical additives by optimising the dosage.

Laboratory technology for characterising particle size and zeta potential

The Malvern Zetasizer Nano product range comprises high-performance and entry level systems that can combine various components, including:

  • Analysers: particle size, zeta potential or molecular weight
  • Protein mobility and microrheology measurements

Particles sizes less than a nanometer to several microns, as well as their zeta potential, can be analysed.

Online monitoring of coagulant process and measuring zeta potential

The fully automated Zetasizer WT system delivers lab quality online zeta potential measurements.

This enables efficient charge neutralisation and real-time monitoring of flocculation process performance. This information allows process operators to react to changes in raw water before they cause filtration issues, while reducing potential process upsets and chemical coagulant use.

About Malvern

Based in the UK, Malvern Instruments has subsidiaries in major European markets.

The company also has offices in China, Japan, Korea, Mexico and North America, as well as a joint venture in India, and a worldwide network of distributors and application laboratories.

Contact Details

Malvern Instruments
Enigma Business Park
Grovewood Road
WR14 1XZ
United Kingdom
+44 1684 892456 (Sales)
+44 1684 892456 (Support)
+44 1684 892789
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Available White Papers


Examining the Impact of Particle Properties and Behaviour on Suspension Rheology 19 October 2017 Understanding how dispersed particles in a liquid medium interact with one another is a crucial step in achieving the desired product performance in systems such as ceramics, adhesives and paints.


Water Treatment Solutions 12 October 2017 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.


Monitoring Microfiltration Processes for Water Treatment 05 October 2017 Quantifying Nanoparticle Concentration and Size to Optimize Filtration Processes.


A List of Common Dynamic Light Scattering Terms and Definitions 28 September 2017 There are a number of resources available that provide a mathematical description of a wide array of light-scattering terms.


Monitoring Particle Properties in Water Treatment Microfiltration Processes 21 September 2017 The dual effect of increasing demand for water supply, as well as tightening of government regulations, has led to a greater research emphasis into water treatment processes.

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