Waste Water Treatment (AQA GCSE Chemistry): Flashcards
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Practise the cards
15 cards from this deck
What does human waste contain?
What does human waste contain?
Harmful bacteria & high nitrogen compounds
Impact of human waste on water
Impact of human waste on water
Depletes oxygen & causes excessive algae growth
What does industrial wastewater contain?
What does industrial wastewater contain?
Harmful chemicals & toxic metal compounds
What does agricultural wastewater contain?
What does agricultural wastewater contain?
Fertilisers & pesticides
Impact of agricultural waste
Impact of agricultural waste
Nutrient pollution, algal blooms, loss of biodiversity
Purpose of coarse filter in water treatment
Purpose of coarse filter in water treatment
Remove large particles & debris
What happens in sedimentation?
What happens in sedimentation?
Larger solid particles settle under gravity
What is sewage sludge?
What is sewage sludge?
Solid waste that settles at the bottom
Materials used in fine filtration
Materials used in fine filtration
Layers of sand & gravel
Purpose of anaerobic digestion
Purpose of anaerobic digestion
Reduce sludge volume & produce biogas
Conditions for anaerobic digestion
Conditions for anaerobic digestion
Bacteria break down sludge in absence of oxygen
Purpose of aerobic treatment
Purpose of aerobic treatment
Break down remaining organic matter in effluent
Purpose of chlorination in water treatment
Purpose of chlorination in water treatment
Kill bacteria, prevent disease, make water safe
Environmental benefit of wastewater treatment
Environmental benefit of wastewater treatment
Protects natural water bodies from pollution
Sustainability benefit of wastewater treatment
Sustainability benefit of wastewater treatment
Manages water resources where water is scarce