Basic Process CHONS + y H₂O → × CH4 + (c-x)CO2 + n NH4 + s H₂S * S x = 1/8 (4ch -20 - 3n - 2s) y = 14 * (4c-h - 20 + 3n+ 3s) No oxygen! 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.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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 Problem 6-6 (assume the waste is fed to an anaerobic digester, not landfilled). Use the equation given attached. Find x (moles of CH4) for food and paper as well. Then based moles of methane (x), individually calculate methane generated for paper and food waste and then total it. Provide answers in tons. 

Basic Process
CHONS + y H₂O → × CH4 + (c-x)CO2 + n NH4
+ s H₂S
*
S
x = 1/8 (4ch -20 - 3n - 2s)
y = 14 * (4c-h - 20 + 3n+ 3s)
No oxygen!
Transcribed Image Text:Basic Process CHONS + y H₂O → × CH4 + (c-x)CO2 + n NH4 + s H₂S * S x = 1/8 (4ch -20 - 3n - 2s) y = 14 * (4c-h - 20 + 3n+ 3s) No oxygen!
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.
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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