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15 cards from this deck
Harmful bacteria & high nitrogen compounds
Depletes oxygen & causes excessive algae growth
Harmful chemicals & toxic metal compounds
Fertilisers & pesticides
Nutrient pollution, algal blooms, loss of biodiversity
Remove large particles & debris
Larger solid particles settle under gravity
Solid waste that settles at the bottom
Layers of sand & gravel
Reduce sludge volume & produce biogas
Bacteria break down sludge in absence of oxygen
Break down remaining organic matter in effluent
Kill bacteria, prevent disease, make water safe
Protects natural water bodies from pollution
Manages water resources where water is scarce
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