6-3. Using the approximate chemical analyses of refuse-C,,H14,05,N- what is the empirical formula for the organic fraction of refuse? Estimate the theoretical production of methane from this hypothetical compound. 6-4. Describe how your community manages its organic waste. 6-5. Suppose you are a city engineer. An advertisement appears in a trade journal for a new in-vessel compost- ing system that produces methane gas as a valuable end product. Your city manager, who has no technical training, asks you to find out more about this system. You decide to write a letter to the company, Bioscam Inc., requesting more information. What questions would you ask? Write such a letter. 6-6. Assume a rough estimate of MSW composition is as follows: % By Weight Paper (assume all 50 cellulose, CH,Os) Glass 10 Steel Aluminum 10 00020 10 Food waste (assume sugar CH₁₂O) If 10,000 metric tonnes of this mate- rial is placed in a landfill, how much methane gas would theoretically be produced by anaerobic decomposition? 6-7. Suppose a wet mixture of old bread, leaves, and soil is placed in a pile 1 m tall, and a long thermometer is stuck in the middle of the pile. Every other day, the pile is aerated by throwing the mixture into a new pile. Draw a graph showing the temperature in the pile during the first two weeks and explain why these temperature changes occurs. 6-8. An industry operates a landfill into which an organic waste having the formula CHO decays anaerobically. How much methane gas will be generated if the decomposition is complete? Express your answer as "lb gas/lb waste." a. b. Realistically, given the nature of the anaerobic reaction, how much methane gas might actually be produced (approximately)? Why only this much? 6-9. Estimate the production of CO2 and CH during the anaerobic decomposition of ethanol, CHO. 6-10. What would be three good uses for methane collected from a landfill? 6-11. Describe how a Kompogas in-vessel composting system works.
6-3. Using the approximate chemical analyses of refuse-C,,H14,05,N- what is the empirical formula for the organic fraction of refuse? Estimate the theoretical production of methane from this hypothetical compound. 6-4. Describe how your community manages its organic waste. 6-5. Suppose you are a city engineer. An advertisement appears in a trade journal for a new in-vessel compost- ing system that produces methane gas as a valuable end product. Your city manager, who has no technical training, asks you to find out more about this system. You decide to write a letter to the company, Bioscam Inc., requesting more information. What questions would you ask? Write such a letter. 6-6. Assume a rough estimate of MSW composition is as follows: % By Weight Paper (assume all 50 cellulose, CH,Os) Glass 10 Steel Aluminum 10 00020 10 Food waste (assume sugar CH₁₂O) If 10,000 metric tonnes of this mate- rial is placed in a landfill, how much methane gas would theoretically be produced by anaerobic decomposition? 6-7. Suppose a wet mixture of old bread, leaves, and soil is placed in a pile 1 m tall, and a long thermometer is stuck in the middle of the pile. Every other day, the pile is aerated by throwing the mixture into a new pile. Draw a graph showing the temperature in the pile during the first two weeks and explain why these temperature changes occurs. 6-8. An industry operates a landfill into which an organic waste having the formula CHO decays anaerobically. How much methane gas will be generated if the decomposition is complete? Express your answer as "lb gas/lb waste." a. b. Realistically, given the nature of the anaerobic reaction, how much methane gas might actually be produced (approximately)? Why only this much? 6-9. Estimate the production of CO2 and CH during the anaerobic decomposition of ethanol, CHO. 6-10. What would be three good uses for methane collected from a landfill? 6-11. Describe how a Kompogas in-vessel composting system works.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
- Size a digester to handle the paper, food, and water mixture of problem 6-6.
- Assume that the 10,000 metric tons of waste was anaerobically digested over a 1-year period.
- Assume that the organic fraction of the total solids for paper is the same as that for pulp.
Transcribed Image Text:6-3. Using the approximate chemical
analyses of refuse-C,,H14,05,N-
what is the empirical formula for the
organic fraction of refuse? Estimate
the theoretical production of methane
from this hypothetical compound.
6-4. Describe how your community
manages its organic waste.
6-5. Suppose you are a city engineer. An
advertisement appears in a trade
journal for a new in-vessel compost-
ing system that produces methane
gas as a valuable end product. Your
city manager, who has no technical
training, asks you to find out more
about this system. You decide to
write a letter to the company,
Bioscam Inc., requesting more
information. What questions would
you ask? Write such a letter.
6-6. Assume a rough estimate of MSW
composition is as follows:
% By Weight
Paper (assume all
50
cellulose, CH,Os)
Glass
10
Steel
Aluminum
10
00020
10
Food waste (assume
sugar CH₁₂O)
If 10,000 metric tonnes of this mate-
rial is placed in a landfill, how much
methane gas would theoretically be
produced by anaerobic decomposition?
6-7. Suppose a wet mixture of old bread,
leaves, and soil is placed in a pile 1 m
tall, and a long thermometer is stuck
in the middle of the pile. Every other
day, the pile is aerated by throwing the
mixture into a new pile. Draw a graph
showing the temperature in the pile
during the first two weeks and explain
why these temperature changes occurs.
6-8. An industry operates a landfill into
which an organic waste having the
formula CHO decays anaerobically.
How much methane gas will be
generated if the decomposition is
complete? Express your answer as
"lb gas/lb waste."
a.
b. Realistically, given the nature of
the anaerobic reaction, how much
methane gas might actually be
produced (approximately)? Why
only this much?
6-9. Estimate the production of CO2
and CH during the anaerobic
decomposition of ethanol, CHO.
6-10. What would be three good uses for
methane collected from a landfill?
6-11. Describe how a Kompogas in-vessel
composting system works.
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