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1. Primary Treatment: This step involves the removal of large solid particles from the wastewater, such as sticks, leaves and other debris.
2. Secondary Treatment: This stage includes biological processes that break down organic matter and remove suspended solids, such as bacteria and algae.
3. Tertiary Treatment: This stage includes additional processes to further separate contaminants and remove additional toxins and pollutants from the water, such as filtration, distillation or reverse osmosis.