21. Name the 3 steps of the wastewater treatment plan. 1. Primary (sedimentation/flotation)2. Secondary (biological)3. Advanced
32. What is the purpose of the primary treatment step? Remove things that float and sink
43.What is the purpose of the secondary step?Eat food and ammonia
54. What is the purpose of the advanced treatment step? Filter(purify) & disinfect(clean)
65.Which step is this? What is the name? Advanced treatment/Filter/ Step #3
76.Which step is this? What is the name? Primary/Flotation & Sedimentation
87.Which step is this? What is the name? Secondary/Biological/Aeration
98. What is the path of wastewater, starting from our homes? Pipes Wastewater facility/Treatment Plant LA River/River Long Beach/Ocean
109.Why is important to not flush down toxic chemicals like drano down the toilet?Doesn’t hurt microorganisms
1110.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
1211. Explain what the pH test is used for Measure acidity/basicity Measure acid or base
1312.The pH scale goes from ___0 or_1_ to ___14___. The most acidic being the __lower__ numbers.
1413. Why is it important to maintain a wastewater pH between 6.6-8.5? Doesn’t hurt the microorganisms
1514. Explain what the purpose of the ammonia test is Measure ammonia levels
1615. What is the main source of ammonia in our wastewater? Urine/Pee/Urea
1716. Name the 2 reasons that ammonia is bad Toxic Oxygen goes down when bacteria eat it
1817.What is the process of bacteria eating the ammonia and turning it into a nitrate called?Nitrification
1918.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
2019. Explain what the turbidity test is used for How clear/murky/dirty/cloudy the water is orHow much sediment/suspended particles in water
2120. Why is turbidity bad for fish? Prevents them from absorbing oxygen through gills by blocking their gills
2221.What instrument do we use to measure turbidity?Colorimeter
2322. Why do we cover the colorimeter when reading the blank and sample? To prevent light from entering the source/sample
2423. Why do we need to blank the colorimeter before using? So colorimeter knows what “zero” isTo clear the colorimeter
2524. Explain what the Chemical Oxygen Demand test is used for To test how much oxygen in waterMeasure how much dissolved oxygen
2625. Explain the cause and effect of eutrophication. Cause: Food and ammonia in waterEffect: Dead zones (no oxygen)
2726. What are the measuring units of pH, ammonia levels and turbidity? pH: NoneAmmonia: mg/LTurbidity: FAUs
2928.Does coffee increase or decrease the turbidity?
3029.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.
3130.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.
3231.Between the secondary treatment and after advanced treatment, what happened tothe pH? sameThe turbidity? Decreased, filtered itAmmonia level? Decreased, microoganisms ateIf changed, explain why.
3332. What kind of organisms were found in the activated sludge? PathogensVirusesBacteriaProtozoaMicroorganismsFungi AlgaeMicrobes
3433.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
3534.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
3635. What is the purpose of Aluminum Sulfate? Make solids sink More sedimentation
3736. Advanced treatment involves the following 2 steps: 1.Filtration 2. Disinfection (chlorination/UV)
3837.What does the wastewater facility use to disinfect water? (2 options)ChlorinationUV Radiation
3938.How does the plant remove chlorine from the water?Dechlorination