Viemärijätevesi

Viemärijätevesi refers to wastewater that is collected and transported through a sewer system. This includes domestic sewage from households, industrial wastewater from businesses, and stormwater runoff that enters the sewer system. The composition of viemärijätevesi can vary greatly depending on its source, but it generally contains organic matter, nutrients, pathogens, chemicals, and suspended solids.

Proper treatment of viemärijätevesi is crucial for protecting public health and the environment. Untreated wastewater discharged into natural water bodies can contaminate drinking water sources, harm aquatic life, and spread diseases. Wastewater treatment plants are designed to remove pollutants from viemärijätevesi through various physical, chemical, and biological processes.

The treatment process typically involves primary treatment, which removes large solids through screening and sedimentation. Secondary treatment uses biological processes to break down dissolved organic matter. Tertiary treatment, which is more advanced, may be employed to remove specific pollutants like nutrients or pathogens, depending on the required effluent quality.

After treatment, the cleaned water, known as effluent, is discharged into rivers, lakes, or the sea. The solid material removed during treatment, called sludge, is often further processed and disposed of or utilized in applications like fertilizer. Effective management of viemärijätevesi is a fundamental aspect of modern sanitation and environmental protection.