water unit: environmental science 303 loch
TRANSCRIPT
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Water Unit: ENVIRONMENTAL SCIENCE 303
LOCH
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How sure are you?
CREATE A KWL CHART
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Each student reads the next slide
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Toilet Sink Washing Machine Dishwasher Your house, a laboratory, an industrial
factory, etc…
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Wastewater tx plants will always be in the basin of a watershed…why?
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PHYSICAL
Filtering large particles goes to landfill
Settle large particles on to secondary
removes ~60% of suspended solids from wastewater.
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BIOLOGICAL
Bacterial growth promoted, then killed1. Add O2 to encourage bacterial growth2. Bacteria decompose waste – yum!3. Bacteria are killed via chlorine (usually)
Removes >90 percent of suspended solids.
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CHEMICAL & PHYSICAL
“optional” (not done conventionally)
Reduce pollutants of “special concern”› Nutrients like Nitrates and Phosphates…why?
Uses chemicals & a 2nd filter to clean more
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WATER
Into a lake or river ocean
Crops/Golf course Possible problems?
SLUDGE
Lagoon Incinerator Crop fertilizer Possible problems?
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Beauty ProductsMedicine
Engine OilPaint
Lawn Care ProductsPrescription Drugs
Photographic ChemicalsUsed Cooking Oil
Fat from cooking BaconDiapers
Tampons
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WastewaterTreatment Recap
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Sort these concepts correctly into the Primary, Secondary, Advanced processes
Optional, not usually done Settles large particles to create sludge
Filters large particles which go to a landfill
Removes pollutants like nitrates and phosphates
Removes bacteria with chlorine or ultraviolet light
Adds O2 to help bacteria grow
Uses a 2nd filter Bacteria added to decompose waste
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1. 2.
3.
4.
5.
6.Drinking WaterTreatment
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Boiling Using Sun’s Rays to
disinfect Lifestraw
Purification plants Toilet to Tap
How’s this linked to…Life expectancies?Natural Disasters?Hiking?
Purification depends on $$$
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What do you normally drink? Why?
What do you know about bottled water?
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Recycles wastewater to drinking water Video clip
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Show the differences and similarities between drinking water and wastewater treatment.