Water Treatment Technologies

Veolia Water Technologies South Africa provides all the water treatment technologies to produce drinking water certified to World Health Organisation (WHO) and SANS 241 standards.

Our water treatment technologies are based on over 160 years of experience. Today, they help municipalities across southern Africa supply drinking water safely, reliably and cost-effectively, and are available for in-ground applications or as containerised Water Techno Packages.

Our technologies include:

Through water treatment technologies, Veolia Water Technologies South Africa is enhancing the performance and safety of drinking water treatment plants in Southern Africa.

Containerised potable water treatment technologies:

Veolia Water Technologies supplies packaged drinking water plants as part of our Water Techno Packages range.

Our Potable Water Treatment Plants (PWTP™) can supply up to 100 m3 potable water per hour. Manufactured using standard Veolia coagulation, flocculation, lamella clarification, sand filtration and disinfection technologies, the PWTP™ can be fabricated to your requirements in as little as 12 weeks.

These plants are ideal for potable water production in municipal, tourism, agriculture and industrial applications. 

Find out more about the PWTP™ Water Techno Package.

Our range of water treatment technologies for drinking water include:


Clarification is the first of the water treatment technologies used in treating drinking water, used for the removal of suspended solids and particulate matter from water. Clarification is usually done in combination with flocculants and coagulants to help improve the setline of these solids.

In treating municipal drinking water, clarification usually forms part of a pre-treatment process prior to further purification. Veolia uses several methods of clarification in water treatment, including the patented Actiflo® and Multiflo® processes. These water treatment technologies deliver optimum space and process efficiency, resulting in a quicker, more effective clarification stage. They are easily retrofitted, expanded and adjusted as required.

Clarification is also used in treating industrial effluent (including the specialised removal of grease and oil content in effluents) and in municipal wastewater treatment.

Read more about clarification.


Downstream of clarification, any remaining solids and unsettled floc is filtered from the feed water. Suspended solids (turbidity), organic and micro-pollutants, heavy metals and other particles not removed by clarification water treatment technologies are extracted using a large variety of drum, disk, gravity and pressurised filters – each with its own benefits according to application.

Rapid gravity sand filters are the most common type of filter water treatment technologies, although pressure filters are also used. Filters can use anything from the traditional sand and activated carbon, to multiple layers of various media.

Filtration is used across the spectrum of water treatment applications. In addition to drinking water treatment, filtration is used for treating industrial effluent, process water and sewage. It is also a critical stage of treatment in trains that use membrane processes and seawater desalination.

Read more about filtration.

Membrane separation

Membrane water treatment technologies separate certain molecules or ions from the feed water through the use of membranes. The rate of flow through these semi-permeable membranes depends on pressure, concentration and temperature of solutes. Membrane permeability is defined through solute size, solubility properties and chemistry.

Veolia provides the complete range of membrane separation technologies used in water treatment:

  • Microfiltration (MF)
  • Ultrafiltration (UF)
  • Nanofiltration (NF)
  • Reverse Osmosis (RO)

There are also several types of membrane configurations: spiralwrap, tubular, flatsheets and capillary.

Membrane separation is used in the desalination of seawater and brackish water and in the production of potable water; as well as in polishing and demineralisation of water for boilers and pharmaceutical operations; rehabilitation and recycling of process and municipal effluent; and as part of zero liquid discharge (ZLD) applications.

Read more about membrane separation.


Ion exchange water treatment technologies are used for water softening for household water use, whereby ions are exchanged between a solution and an ion exchange resin, either cationic or anionic. The process is reversible and the resin can be regenerated and used continually.

The production of potable water commonly uses decarbonisation and softening exchange. Demineralisation and deionisation of process and boiler feed water are the most common industrial applications of exchange, in addition to specialist application such as metals recovery, arsenic removal and heavy metals removal.

Read more about ion exchange.

Hydrex™ chemicals

The Hydrex™ range of chemicals includes a range of organic and inorganic formulae. They represent a critical aspect of our water treatment technologies in meeting the complete spectrum of water treatment applications across municipal, industrial and utilities applications. Chemicals used in drinking water applications include the Hydrex™ 3000. Hydrex™ 4000 is used in applications involving membrane separation treatment.

The 3000 series includes scale and corrosion inhibitors; flocculants and polymers; coagulants; and green chemistry. It is an effective range of solutions for clarifying water streams by removing solids and turbidity.

Read more about water treatment chemicals.

Find out more about our water treatment technologies:

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