2 Standards W-5: SWBAT describe the process of wastewater treatment W-6: SWBAT list and describe the major types of water pollution
3 WastewaterDef: Water that contains waste from home and industry
4 Goal of Wastewater Treatment Water is filtered and treated to make the water clean enough to return to a river or lake
5 What’s in the Wastewater? Most of the wastewater from homes contain biodegradable material that can be broken down by living organismsWater from the kitchen and toilet contain plant and animal wasters, paper, and soaps all of which are biodegradable
13 Fats, Oils, and Grease (F.O.G’s) Builds up in the sewer system and can cause back upsDo’s:Recycle used cooking oilPut food scraps in trashDon’t:Pour F.O.G.s down the drainUse the toilet as a trash canUse rags or cloths towels to clean grease
14 #2 Artificial Eutrophication Eutrophication caused by humans#2 Artificial Eutrophication
15 Eutrophicationdef: A natural process where a body of water receives excess nutrients, which causes a loss of oxygen.Some nutrients are GOOD, but too many may cause a body of water to become eutrophic
16 I can’t breathe!When organic matter builds up, it will begin to decay and decomposeThe process of decomposition uses oxygen
17 Causes of Eutrophication Fertilizers from farms, lawns, and gardensPhosphates in some detergents
18 WhiteboardsOn your whiteboards, write down the definition of thermal pollution and provide some major causes of such.
19 #3: Thermal Pollutiondef: the degradation of water quality by changing the temperature of a natural body of water
20 Sources of Thermal Pollution Power plants and other industries use water in their cooling systems and then discharge the warm water into a lake or riverCFU
21 It’s getting hot in herre... As the water temperature rises, the amount of dissolved oxygen decreasesIt’s getting hot in herre...
22 #4: Groundwater Pollution Pollutants usually enter groundwater when polluted surface water percolates down from the surface.#4: Groundwater Pollution
23 Leaking Underground Storage Tanks (LUST) Major source of groundwater pollutionEstimated 1 million+ in the USGas stationsStorage tanks develop leaks as they age, allowing pollutants to enter the ground
24 Problems with LUSTThe location of an aging UST is not always known, so tanks cannot be replaced or repaired until they have leaked enough pollutants.
28 Whiteboards-PPMWater contamination is often measured in parts per million (ppm).If the concentration of a pollutant is 5 ppm, there are 5 parts of the pollutant in 1 million parts of water.Q: If the concentration of gasoline is 3 ppm in 650,000 L of water, how many liters of gasoline are there in the water?
30 If there are 10 ppm of arsenic in 500,000L of water, how many liters of arsenic are there?
31 Clean-up TimeGroundwater pollution is one of the most challenging environmental problem the world faces.The process for some aquifers to recycle water and purge contaminants can take 100s or 1000s of years
32 Sticky Icky IckyPollution can cling to the materials that make up an aquifer.Putting clean water in a dirty aquifer is useless!
33 Ocean PollutionAt least 85% of ocean pollution comes from activities on land
34 Each year, approximately 37 million gallons of oil from tanker accidents are spilled into the oceans Oil Spills
35 Caution: Slippery when...Oily? Oil spills only account for 5% of oil pollution in the oceans.Most of the oil that enters the oceans come from cities and towns.million gallons/yr
36 Quick CheckHow can limiting nonpoint sources of oil pollution help keep the oceans clean?
37 Biomagnificationdef: the build up of pollutants at higher levels of the food chain