Chriwa Group - Water matters. We care.

Disinfection

During the disinfection of the treated wastewater, remaining bacteria and germs are killed. This fulfils particularly high demands on the biological quality of the wastewater. Under certain circumstances, treated and disinfected wastewater can also be reused as process water. This wastewater recycling can significantly reduce the fresh water consumption of the production site. Especially in water-scarce regions, wastewater recycling is not only ecological but also economical. There are many options for wastewater disinfection. The most cost-efficient and widespread methods in wastewater treatment are chlorination and UV irradiation.

 

As the name suggests, chlorination adds soluble chlorine to the water after clarification is complete and kills any remaining living organisms. The biggest advantage of chlorination is the low technical requirement. This makes chlorination cost-effective. However, if used incorrectly, undesirable and sometimes toxic by-products can arise.

UV irradiation offers an alternative to the addition of disinfectants. This also kills microorganisms and viruses. However, in contrast to chlorination, no by-products are produced. UV irradiation also leaves no perceptible traces such as odour or taste. For sufficient irradiation, it must be ensured that both the irradiation duration and the irradiation intensity are sufficient, as otherwise recontamination cannot be ruled out.