Primary water treatment:

Question

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Primary water treatment is the first step in the wastewater treatment process and is designed to remove suspended solids, oil and grease, and other physical debris from the water. This is usually done through a combination of physical and chemical processes such as screening, sedimentation, and flotation. The removal of phosphorus and nitrogen, the aerobic digestion of organic waste, and the removal of heavy metals and pesticides are typically addressed in secondary and tertiary treatment processes. Anaerobic digestion is also typically part of the secondary treatment process.

Primary Water Treatment