Secondary Wastewater Treatment

In secondary treatment, up to 90 percent of the organic matter in the wastewater can be removed by leveraging naturally occurring biological processes. Although many types of plant layouts exist to biologically treat wastewater, they all rely on a healthy, well-acclimated population of microorganisms that require careful management. Various inputs like dissolved oxygen, temperature, and nutrient levels are all critical to the efficiency of the process. A final step, known as secondary clarification, allows wastewater to settle before it is reintroduced into the environment or sent for further treatment, which is often referred to as tertiary treatment.
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Ecolab Hispano-Portuguesa, S.L.
Avda. del Baix Llobregat, 3-5
08970 – Sant Joan Despí (Barcelona) Spain

Customer Service
Tel: +34 902475480 | Fax: +34 902475481

More Information

Nalco offers diagnostic services and a full package of treatment programs that can address any situation or operational objective you may need to address. E-mail us at and tell us your raw and wastewater challenges. We'll work to deliver integrated solutions based on your specific needs.