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13 cards from this deck
Harmful bacteria & high nitrogen compounds
Depletes oxygen & promotes excessive algae growth
Harmful chemicals & toxic metal compounds
Fertilisers & pesticides
Nutrient pollution, algal blooms, biodiversity loss
Remove large particles & debris (1st treatment step)
Larger solid particles settle under gravity
Solid waste settling at bottom during sedimentation
Liquid on top after sedimentation w/ dissolved pollutants
Reduce sludge volume & produce biogas (renewable energy)
Bacteria break down sludge without oxygen
Bacteria break down organic matter in effluent using oxygen
Kill bacteria, prevent disease, make water safe to drink
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