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Industrial Waste Treatment
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Industrial Waste Treatment
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25 Questions

1. Which of the following is not a volatile organic compound?
2. What is the neutral pH?
3. What is the colour of the wastewater after 6 hours of a generation?
4. Secondary sludge includes treated sewage sludge.
5. How does the chemical sludge appear?
6. What is the first step in the sewage treatment process?
7. Primary sludge includes __________
8. SBR is a type of ________
9. ___________ helps to mix the incoming influent and the returned activated sludge.
10. In which stage of the SBR is aeration performed?
11. Bio-selectors direct the flow.
12. Total solids in a wastewater consist of insoluble solids alone.
13. The formation of ferrous sulphide leads to the blackening of water.
14. What is the colour of septic wastewater?
15. ______ is used to remove phosphorus compounds from the liquor.
16. The multiplication of _________ is encouraged by the addition of oxygen.
17. What is the percentage of dry solids assumed for the sludge at the outlet of a centrifuge?
18. What does Wsp stand for in the above equation?
19. What is the percentage of aerobically digested sludge?
20. The _________ is usually the same length in time as the aeration.
21. Which of the following methods are used in rural communities?
22. How many types of BOD are present?
23. What is the minimum percentage of solids in wastewater?
24. ______ is removed by Anammox.
25. What is the amount of solids released into wastewater by human beings?

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