Warm Up Copy the agenda and learning targets from the white board

Oxygen Demanding waste Any waste that undergos decomposition – Human waste – Animal waste – Processing scraps – Fertilizer runoff – Plant components (leaves, needles, compost)

Biochemical oxygen demand (BOD) Amount of oxygen used by a body of water over a specific period of time Lower BOD= less Oxygen Demanding Waste – Healthy stream has a BOD of 5-20 mg of O 2 Higher BOD= greater Oxygen Demanding Waste – Human waste water has a BOD of ~200 mg of O 2

Eutrophication Caused by higher amounts of Oxygen Demanding Waste Causes higher BOD Results in anoxic (no oxygen) dead zones

Eutrophication Dead Zone

Eutrophication True or False? – The Mississippi River drains 41% of the continental US causing a dead zone in the Gulf of Mexico – Eutrophication in Chesapeake Bay has lead to a dramatic decrease in oyster and blue crab harvests and other fish species – There are nearly 200 dead zones around the world – Asia has the greatest total area of eutrophic water ways in the world

Scavenger Hunt What methods exist to decrease nutrient sources that cause Eutrophication?

Warm Up Disease-causing organisms – _________ of the world’s population do not have access to safe drinking water. – _________ of the annual 3.1 million deaths from water borne diseases can be prevented. – _________ of the world’s population lack access to proper sanitation and over half of these people live in _________ and ________.

Warm Up Disease-causing organisms – One sixth of the world’s population do not have access to safe drinking water. – 50 percent of the annual 3.1 million deaths from water borne diseases can be prevented. – 42 percent of the world’s population lack access to proper sanitation and over half of these people live in China and India.

Wastewater Treatment Compare and contrast different methods of treating wastewater

Septic Tank 4cfs

Sewer system wK78

Organic Food Chain Reactor

Pollutant Project Each student will research two different pollutants Create a PowerPoint slide for each pollutant that describes – Main sources of the pollutant – Human health effects – Environmental impacts – Laws regulating the pollutant (if any) and legal limits