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.