water unit: environmental science 302 loch. how sure are you? create a kwl chart
TRANSCRIPT
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Water Unit: ENVIRONMENTAL SCIENCE 302
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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Go to the website on the wikipage
This will teach you basic information about the wastewater treatment plant
1. The SOURCES of wastewater
2. The STEPS in treatment (primary, secondary, advanced)
3. The FATE of the end products
http://www.wef.org/flash/gowiththeflow_english/theflow.htm
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TodayToday: Create a graphic organizer to follow along and organize your info
Longterm: you have until class next Wednesday to show me – everyone in the class that is – that you understand this information. How are you going to do that?
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In the Primary, Secondary, Advanced columns, sort these concepts correctly
Optional, not usually done Settles large particles
Filters large particles which go to a landfill
Removes pollutants like nitrates and phosphates
Removes bacteria with chlorine or ultraviolet light
Adds O2 to promote bacterial growth
Uses a 2nd filter Bacteria added to decompose waste
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Now that you have the gist, show me that you know this very well. Which means:
› You can clearly represent the steps to me› In a different context› It will be creative and help your classmates
(or other classes) learn› It will answer one of our original questions
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•Where does the poop go?•Do we drink our own wastewater?•How is drinking water filtered?•Do dead fish get to the ocean if you flush them?•Where does the stuff go that is filtered out?•Is the water cycle on any other planets?•How much water does Philly use on a daily basis?•How can you tell if your water is clean?•What happens if you drink your own poop water?•Is toilet water drinkable?•Do we use our waste for anything productive?
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•Why does water fountain water taste different?•How do we know if water is contaminated?•How long does the process take?•Is natural filtration as good as a treatment plant?•What factors affect the process?•Is toilet water clean enough to drink?•How do companies shut off your water?•Why is tap water in other countries unsafe to drink?•What happens to toilet paper?•What happens to random objects (fish) that get flushed?
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•How do they get out things that have dissolved in the water (polar)?•Is toilet water actually dirty?•How long is the process from toilet to tap?•Why does sewage smell?•Why is water from the faucet sometimes white?•Is finding Nemo accurate?•What happens to stuff that you put down the toilet?•What happens to poison, drugs?•Why do some people think you can’t drink the sink water?
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Toilet Sink Washing Machine Dishwasher Your house, a laboratory, an industrial
factory, etc…
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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 killed› Aeration encourages bacterial growth
puts O2 back into water
› Bacteria decompose waste – yum!› 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 coagulating chemicals & a 2nd filter
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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 ProductsPhotographic Chemicals
Used Cooking OilFat from cooking Bacon
DiapersCondoms
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Wastewater tx plants will always be in the basin of a watershed…why?
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http://www.youtube.com/watch?v=Q7bVx8FBx5s&feature=related
Start at 20sec
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Recycles wastewater to drinking water Video clip
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WastewaterTreatment Recap
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Recycles wastewater to drinking water Video clip
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1.
2.
3.
4.
5.
6.
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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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Show the differences and similarities between drinking water and wastewater treatment.
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•Where does the poop go?•Do we drink our own wastewater?•How is drinking water filtered?•Do dead fish get to the ocean if you flush them?•Where does the stuff go that is filtered out?•Is the water cycle on any other planets?•How much water does Philly use on a daily basis?•How can you tell if your water is clean?•What happens if you drink your own poop water?•Is toilet water drinkable?•Do we use our waste for anything productive?
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•Why does water fountain water taste different?•How do we know if water is contaminated?•How long does the process take?•Is natural filtration as good as a treatment plant?•What factors affect the process?•Is toilet water clean enough to drink?•How do companies shut off your water?•Why is tap water in other countries unsafe to drink?•What happens to toilet paper?•What happens to random objects (fish) that get flushed?
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•How do they get out things that have dissolved in the water (polar)?•Is toilet water actually dirty?•How long is the process from toilet to tap?•Why does sewage smell?•Why is water from the faucet sometimes white?•Is finding Nemo accurate?•What happens to stuff that you put down the toilet?•What happens to poison, drugs?•Why do some people think you can’t drink the sink water?
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Fill in more items in the “L” column of your KWL
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Grit Filters (to remove large
matter)
Sedimentation tank
Trickling filter
AerationSecondary filters
Wastewater from city
To streamTertiary
treatment
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Primary Filters (to remove large matter)
Flocculation tank
Sedimentation tank
Rapid / slow sand filtrationChlorination
Water from rivers / lakes
To tanks in the city
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What does it include?› Brainstorm a list of 5 contents
Where does it come from?› Brainstorm a list of 5 contents
Why should humans care?
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Why are we concerned about water usage if the law of conservation of matter is true?
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Disease-causing pathogens can destroy food chains
Organisms die….leading to low oxygen levels via decomposers› May be due to increased algal growth or more directly
via toxic kills Chlorine compounds and inorganic chloramines
can be toxic to aquatic invertebrates, algae and fish;
Bioaccumulation› Metals, such as mercury, lead, cadmium, chromium
and arsenic can build up a food chain Pharmaceutical and personal care products may
cause unknown effectsunknown effects…
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http://ga.water.usgs.gov/edu/wwvisit.html
Stages of treatment, purpose of a treatment plant
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