Water Unit: ENVIRONMENTAL SCIENCE 303
LOCH
How sure are you?
CREATE A KWL CHART
Each student reads the next slide
Toilet Sink Washing Machine Dishwasher Your house, a laboratory, an industrial
factory, etc…
Wastewater tx plants will always be in the basin of a watershed…why?
PHYSICAL
Filtering large particles goes to landfill
Settle large particles on to secondary
removes ~60% of suspended solids from wastewater.
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.
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
WATER
Into a lake or river ocean
Crops/Golf course Possible problems?
SLUDGE
Lagoon Incinerator Crop fertilizer Possible problems?
Beauty ProductsMedicine
Engine OilPaint
Lawn Care ProductsPrescription Drugs
Photographic ChemicalsUsed Cooking Oil
Fat from cooking BaconDiapers
Tampons
WastewaterTreatment Recap
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
1. 2.
3.
4.
5.
6.Drinking WaterTreatment
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 $$$
What do you normally drink? Why?
What do you know about bottled water?
Recycles wastewater to drinking water Video clip
Show the differences and similarities between drinking water and wastewater treatment.