ANDIG4 – Answers
1. Answer: A. Carbohydrates, proteins and fats
2. Answer: B. Sugars, amino acids
3. Answer: C. 40 to 50 percent
4. Answer: D. Acetogenesis, Methanogenesis, Hydrolysis, Acidogenesis
5. Answer: C. 45 to 65 percent
6. Answer: B. 4 to 8 weeks
7. Answer: A. True
8. Answer: C. Fill the digester with water, bring the water to operational temperature, and then slowly add feedstock.
9. Answer: D. Seed sludge or effluent will contain all the ferment ing bacteria to ensure a quicker start up for biogas production.
10. Answer: B. False
11. Answer: A. True
12. Answer: B. False
13. Answer: E. All of the above
14. Answer: D. All of the above
15. Answer: A. True
16. Answer: A. True
17. Answer: D. All of the above
18. Answer: A. True
19. Answer: C. Hydrogen sulfide
20. Answer: B. Oxygen
21. Answer: D. Rotten eggs
22. Answer: E. All of the above
23. Answer: A. True
24. Answer: B. False
25. Answer: C. Methane
26. Answer: C. Both A and B
27. Answer: A. True