Waste Water Treatment - Topic 2 - Paper 1
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Give 3 domestic sources of waste water
Sinks Showers Toilets
Give 2 agricultural sources of waste water
Nutrient run-off Animal waste
Give 2 things that are removed from domestic and agricultural waste water in treatment
Harmful microbes Organic matter
Give 3 basic stages of sewage treatment
Screening - removal of large objects, e.g. plastic bottles Sedimentation - letting sewage sit in a settlement tank to separate sludge and effluent Digestion - anerobic for sludge (to produce methane and fertilisers) and aerobic for effluent (to break down harmful microbes so that water can be released back into the environment)
Name 3 sources of water in the UK which can be purified to provide us with potable water
Ground - aquifers (rocks which trap water water underground) Surface - lakes, rivers and reservoirs Waste - water which has been contaminated by human processes (e.g. water as a by-product of some industrial processes, perhaps with other chemicals in)