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Mermaids tears - PowerPoint PPT Presentation

Protect Our Waves

Protect Our Waves. Tertiary Treatment (1). Q: What is raw sewage? A: Sewage that has not been cooked B: Sewage containing large waste items C: Sewage that has not been treated D: Sewage that is dark in colour. Tertiary Treatment (2). Q: What is tertiary treatment of sewage?

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Mermaids tears - PowerPoint PPT Presentation

Protect Our Waves