1. __________ is defined as the absence of oxygen.
| Anaerobic | ||
| Aerobic | ||
| Propionic | ||
| Odoriferous |
2. The end product of decaying organic matter (through anaerobic methods) includes all of the following EXCEPT:
| methane. | ||
| ammonia. | ||
| carbon dioxide. | ||
| oxygen. |
3. A finished compost is ready to be used as fertilizer. The compost contains 20 lb total solids. Approximately how many pounds of phosphorous are in the compost?
| 0.2 lb | ||
| 0.5 lb | ||
| 5 lb | ||
| 10 lb |
4. Twenty five tons of a mixture of paper and other compostable materials has a moisture content of 18%. How many gallons of water must be added so that the moisture content is 50%? The density of water is 8.34 lb/gallon.
| 72.7 gallons | ||
| 3840 gallons | ||
| 6000 gallons | ||
| 17,400 gallons |
5. All of the following are parts of an aerated static pile composting system EXCEPT for a(n):
| exhaust fan. | ||
| shredder. | ||
| sludge agent. | ||
| drain for condensates. |
6. One thousand pounds of cellulose (C6H10O5) is anaerobically converted to methane and carbon dioxide. How much carbon dioxide is produced?
| 0.272 lb | ||
| 0.815 lb | ||
| 272 lb | ||
| 815 lb |
7. One thousand pounds of cellulose (C6H10O5) is anaerobically converted to methane and carbon dioxide. How much methane is produced?
| 0.0988 lb | ||
| 0.296 lb | ||
| 98.8 lb | ||
| 296 lb |
8. How many pounds of nitrogen are in food waste in Louisville, KY, if the food waste contains a total of 100 pounds of carbon plus nitrogen? Use Table 8-5.
| 6.29 lb | ||
| 85.1 lb | ||
| 93.7 lb | ||
| 159 lb |
9. Municipal refuse usually contains about __________ organic materials.
| 75% | ||
| 50% | ||
| 70% | ||
| 20% |
10. If a composting pile becomes __________, the pH continues to drop due to the action of the acid formers.
| anaerobic | ||
| aerobic | ||
| stagnant | ||
| clear |
11. Five tons of a mixture consisting of paper and other compostable materials has a moisture content of 7%. The intent is to make a mixture for composting that is 50% moisture. How many tons of water or sludge must be added to the solids to achieve this moisture concentration in the compost pile?
Your response should be at least 200 words in length.
12. Describe some of the ways landfill gas is currently being used. Which do you view as the most productive, and why?
Your response should be at least 200 words in length.
Worrell, W. A., &Vesilind, P. A. (2012).Solid waste engineering (2nd ed.). Stamford, CT: Cengage Learning.
