2 1. Name the 3 steps of the wastewater treatment plan. 1. Primary (sedimentation/flotation)2. Secondary (biological)3. Advanced
3 2. What is the purpose of the primary treatment step? Remove things that float and sink
4 3.What is the purpose of the secondary step?Eat food and ammonia
5 4. What is the purpose of the advanced treatment step? Filter(purify) & disinfect(clean)
6 5.Which step is this? What is the name? Advanced treatment/Filter/ Step #3
7 6.Which step is this? What is the name? Primary/Flotation & Sedimentation
8 7.Which step is this? What is the name? Secondary/Biological/Aeration
9 8. What is the path of wastewater, starting from our homes? Pipes Wastewater facility/Treatment Plant LA River/River Long Beach/Ocean
10 9.Why is important to not flush down toxic chemicals like drano down the toilet?Doesn’t hurt microorganisms
11 10.What are the 4 tests that a wastewater treatment plant does on the water at various steps of he process?pHAmmoniaCOD (Chemical Oxygen Demand)Turbidity
12 11. Explain what the pH test is used for Measure acidity/basicity Measure acid or base
13 12.The pH scale goes from ___0 or_1_ to ___14___. The most acidic being the __lower__ numbers.
14 13. Why is it important to maintain a wastewater pH between 6.6-8.5? Doesn’t hurt the microorganisms
15 14. Explain what the purpose of the ammonia test is Measure ammonia levels
16 15. What is the main source of ammonia in our wastewater? Urine/Pee/Urea
17 16. Name the 2 reasons that ammonia is bad Toxic Oxygen goes down when bacteria eat it
18 17.What is the process of bacteria eating the ammonia and turning it into a nitrate called?Nitrification
19 18.Why do we need to dilute the wastewater sample by 50% before using the ammonia test?Because the Ammonia test only tests between 0-6What do you need to do afterwards to account for the 50% dilution?Multiply by 2 at the end
20 19. Explain what the turbidity test is used for How clear/murky/dirty/cloudy the water is orHow much sediment/suspended particles in water
21 20. Why is turbidity bad for fish? Prevents them from absorbing oxygen through gills by blocking their gills
22 21.What instrument do we use to measure turbidity?Colorimeter
23 22. Why do we cover the colorimeter when reading the blank and sample? To prevent light from entering the source/sample
24 23. Why do we need to blank the colorimeter before using? So colorimeter knows what “zero” isTo clear the colorimeter
25 24. Explain what the Chemical Oxygen Demand test is used for To test how much oxygen in waterMeasure how much dissolved oxygen
26 25. Explain the cause and effect of eutrophication. Cause: Food and ammonia in waterEffect: Dead zones (no oxygen)
27 26. What are the measuring units of pH, ammonia levels and turbidity? pH: NoneAmmonia: mg/LTurbidity: FAUs
29 28.Does coffee increase or decrease the turbidity?
30 29.Between the original wastewater and after primary treatment, what happened tothe pH? Stayed sameThe turbidity? Increased, because things dissolvedAmmonia level? Stayed sameIf changed, explain why.
31 30.Between the primary treatment and after secondary treatment, what happened tothe pH? sameThe turbidity? Increased, because organisms populatedAmmonia level? Decreased, microorganisms ate itIf changed, explain why.
32 31.Between the secondary treatment and after advanced treatment, what happened tothe pH? sameThe turbidity? Decreased, filtered itAmmonia level? Decreased, microoganisms ateIf changed, explain why.
33 32. What kind of organisms were found in the activated sludge? PathogensVirusesBacteriaProtozoaMicroorganismsFungi AlgaeMicrobes
34 33.Why was it important to maintain oxygen levels during the secondary treatment?Microorganisms don’t die while eating food and ammoniaMaintain constant oxygen levelMicroroganisms continue to clean water
35 34.What is the difference between aerobic and anaerobic bacteria? What kind of bacteria are in the sludge?Aerobic- need oxygenAnaerobic- doesn’t need oxygenSludge= Aerobic
36 35. What is the purpose of Aluminum Sulfate? Make solids sink More sedimentation
37 36. Advanced treatment involves the following 2 steps: 1.Filtration 2. Disinfection (chlorination/UV)
38 37.What does the wastewater facility use to disinfect water? (2 options)ChlorinationUV Radiation
39 38.How does the plant remove chlorine from the water?Dechlorination