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The Wastewater Treatment Process

Your wastewater travels through miles of sewer to arrive at one of Halton's Wastewater Treatment Plants (WWTPs).

Step 1: Wastewater arrives at the plant and goes through a pretreatment phase and all of the solid waste is removed.

These solids are turned into "Biosolids". Biosolids are a clean, safe, and viable organic product (in liquid or solid cake form), rich in nutrients, that are beneficially reused by the agricultural community for healthy crop production.

Step 2: The water is then treated with aerobic bacteria, whose job is to eat the remaining "suspended solids" (small particles that weren't filtered out of the water). This process lasts for 12 days.

Step 3: Disinfection is the final part of the treatment process. Halton uses ultraviolet radiation to disinfect the water because it doesn't have a negative impact on the environment like chemicals.

The water that is discharged into the lake is as good as or better (cleaner and safer) than the water in the lake.

See the Journey Water Takes from Drain to Lake