Clean water

Kemira: Industrial water purification saves water resources

The need for pure water is growing, so companies have to pay even more attention to the environmental load of their business by reducing water consumption and environmental contamination. It also set out in the new emission restrictions that wastewater must be purified in order to be able to return it to the municipal sewage system and finally safely back to nature.

Kemira, which has operations worldwide, ensures that after wastewater treatment the quality of the water returned to the environment is as high or even higher than it originally was. With this in mind, Kemira has developed different types of chemicals and processing technologies for disinfection and the removal of heavy metals.

– The wastewater generated in the food industry can be prepurified by means of flotation technology, for example. In the method, chemicals and dispersion water are mixed in wastewater, and the air bubbles released from it bring impurities to the surface. The resulting sludge is skimmed from the surface and directed to sludge processing. Purified water is released from the flotation basin to the municipal sewage system and from there on to the municipal wastewater purification plant for final purification, says Vesa Kettunen,Kemira’s Sales Manager. 

The largest users of wastewater purification equipment are the paper, oil, gas and mining industry and the steel, food and beverage industry. With appropriate processing technologies, wastewater can even be reutilised several times, which helps narrow the gap between water demand and supply.

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With appropriate processing technologies, wastewater can even be reutilised several times