Water Treatment Technologies

Water treatment technologies from Veolia Water Technologies South Africa produce high-quality drinking water from feed water of various qualities using a range of technologies. These water treatment technologies include:

Since the company’s beginnings in 1853, Veolia has used leading water treatment technologies to meet its objectives of supplying safe drinking water to towns and cities across the world. The company’s water treatment technologies can be supplied as a complete turnkey water solution, or retrofitted to upgrade an existing water treatment train.

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

Speak to the experts in drinking water treatment technologies! Send us an enquiry today.

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.

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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.

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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.

There are several membrane processes 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.

Speak to the experts in drinking water treatment technologies! Send us an enquiry today.

Ion exchange

Ion exchange water treatment technologies are used for water softening for household water use. It is a process of ion exchange 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.

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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.

Speak to Veolia today to find out more about our water treatment technologies.

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