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 killed 1. Add O 2 to encourage bacterial growth 2. 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 2 nd filter to clean more

WATER  Into a lake or river  ocean  Crops/Golf course  Possible problems? SLUDGE  Lagoon  Incinerator  Crop fertilizer  Possible problems?

Beauty Products Medicine Engine Oil Paint Lawn Care Products Prescription Drugs Photographic Chemicals Used Cooking Oil Fat from cooking Bacon Diapers Tampons

Wastewater Treatment Recap

Sort these concepts correctly into the Primary, Secondary, Advanced processes Optional, not usually doneSettles 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 O 2 to help bacteria grow Uses a 2 nd filterBacteria added to decompose waste

Drinking Water Treatment

 Boiling  Using Sun’s Rays to disinfect  Lifestraw  Purification plants  Toilet to Tap How’s this linked to… Life expectancies? Natural Disasters? Hiking?

What do you normally drink? Why? What do you know about bottled water?

 Recycles wastewater to drinking water  Video clip Video clip

 Show the differences and similarities between drinking water and wastewater treatment.