Wastewater Treatment Practice

1.

• Name the 3 steps of the wastewater treatment plan.

2.

• What is the purpose of the primary treatment step?

3.

• What is the purpose of the secondary step?

4.

• What is the purpose of the advanced treatment step?

5.

• Which step is this? What is the name?

6.

• Which step is this? What is the name?

7.

• Which step is this? What is the name?

8.

• What is the path of wastewater, starting from our homes?

9.

• Why is important to not flush down toxic chemicals like drano down the toilet?

10.

• What are the 4 tests that a wastewater treatment plant does on the water at various steps of he process?

11.

• Explain what the pH test is used for

12.

• The pH scale goes from _____ to ______. The most acidic being the ______ numbers.

13.

• Why is it important to maintain a wastewater pH between 6.6-8.5?

14.

• Explain what the purpose of the ammonia test is

15.

• What is the main source of ammonia in our wastewater?

16.

• Name the 2 reasons that ammonia is bad

17.

• What is the process of bacteria eating the ammonia and turning it into a nitrate called?

18.

• Why do we need to dilute the wastewater sample by 50% before using the ammonia test?

• What do you need to do afterwards to account for the 50% dilution?

19.

• Explain what the turbidity test is used for

20.

• Why is turbidity bad for fish?

21.

• What instrument do we use to measure turbidity?

22.

• Why do we cover the colorimeter when reading the blank and sample?

23.

• Why do we need to blank the colorimeter before using?

24.

• Explain what the Chemical Oxygen Demand test is used for

25.

• Explain the cause and effect of eutrophication.

26.

• What are the measuring units of pH, ammonia levels and turbidity?

27.

• A pH of 5 is acidic/basic?

28.

• Does coffee increase or decrease the turbidity?

29.

• Between the original wastewater and after primary treatment, what happened to– the pH?– The turbidity?– Ammonia level?

If changed, explain why.

30.

• Between the primary treatment and after secondary treatment, what happened to– the pH?– The turbidity?– Ammonia level?

If changed, explain why.

31.

• Between the secondary treatment and after advanced treatment, what happened to– the pH?– The turbidity?– Ammonia level?

If changed, explain why.

32.

• What kind of organisms were found in the activated sludge?

33.

• Why was it important to maintain oxygen levels during the secondary treatment?

34.

• What is the difference between aerobic and anaerobic bacteria? What kind of bacteria are in the sludge?

35.

• What is the purpose of Aluminum Sulfate?

36.

• Advanced treatment involves the following 2 steps:

37.

• What does the wastewater facility use to disinfect water? (2 options)

38.

• How does the plant remove chlorine form the water?