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MindTap Engineering for Dunlap's Sustainable Energy, SI Edition, 2nd Edition [Instant Access], 1 term (6 months)
2nd Edition
ISBN: 9781337551755
Author: DUNLAP
Publisher: Cengage Learning US
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Chapter 4, Problem 6P
(a)
To determine
Determine the mass of
(b)
To determine
Analyze the burning of methane instead of decomposition has positive or negative environmental effects.
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Equal amounts of two types of waste are disposed into a section of a landfill. They both start
producing gas at t=0. Assume first-order decay for gas production. Each type of waste can
produce 150 L CH4/kg of waste. Waste type A produces gas with a half-life of 8 years, and
waste type B produces gas with a half-life of 4 years. How long (to the nearest year) until 90%
of the total gas has been produced?
a.
0.8 years
b. 6.4 years
c. 7 years
d. 27.6 years
e. 20.4 years
Check
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.
Note: Don't copy from other websites solution.
Estimate the total generation of Methane from 100 kg of organic waste by means of anaerobic digestion. Assume that organic waste is composed of 60 kg of C, 20 kg of O, 16 kg of N, and 4 kg of H.
Please write it so that I can recognize it.
Chapter 4 Solutions
MindTap Engineering for Dunlap's Sustainable Energy, SI Edition, 2nd Edition [Instant Access], 1 term (6 months)
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- The local waste management agency has proposed to set up a waste combustion facility next to the existing landfill to maximize the life span of the landfill. Given the following information, determine how much the life span of the landfill is increased by the combustion. (a) Composition of MSW as given in column 1 of Table 3-4. (b) Estimated landfill capacity remaining = 300,000 yd3 (c) Capacity of combustion facility = 50 ton waste/h (d) Effective on-line combustion time per day = 22 h (e) Initial specific weight of waste = 287 lb/yd3 (f) Final specific weight of waste (MSW and ash) in landfill = 1200 lb/yd3arrow_forwardA county generates 1 million ton of municipal solid waste after recycling every year. The town is considering whether the waste is landfilled or incinerated. For disposal of the waste generated in one year, which option is better to produce less volume of greenhouse gases (GHGs)? Which option is better to have less greenhouse effect? We assume that the waste has a chemical formula of C68H111O50 Decomposition of solid waste in incineration is shown in the following reaction. CaHbOcNd+4a+b+2d-c2O2=aCO2↑+b2H2O+dNO↑ 2) water produced from the reaction(s) is not GHG because it is liquid water).arrow_forwardThe level of nuclear waste that must be put in put in drums and surrounded by concrete, and put into clay lined landfill sites. a. low level b. none of these c. high level d. intermediate levelarrow_forward
- Recall that the Tatooine community has a population of 600663 residents and generate 0.7 kg of solid waste per day per person. Using the waste fraction data from before, estimate the total waste available annually for recycling if metal and glass will be recycled: Waste fraction Food waste Paper Plastic Yard waste Percent (%) 41.1 19.8 13.9 8.4 The remainder of the waste consists of metal, glass, inert material and rubber and inert material and rubber together account for 54.8% of the remainder waste. Answer: x Okg Ometric tons You did not give the correct unit. The correct answer is: 1.17e7 kg Finish reviewarrow_forwardAn industry wants to locate a chemical plant in your city, they expect to generate 25,000 gal/hr of waste containing 800 mg/L of BOD wastes (reactive) and 15,000 mg/L of inert (non-reactive) materials. The industry wants to recycle 300 gal/min (containing 20 mg/L BOD and 400 mg/L of salts) of discharge (effluent) from the municipal wastewater treatment plant to dilute their waste to 6,000 mg/L of inerts prior to pre-treating the wastes on their own property. If the rate constant for the first order degradation of BOD5 to be 0.75/hr, how big must the reactor be to treat the BOD entering the reactor to 200 mg/L?arrow_forwardA landfill initially received 10,000 tons/day of waste. This receipt rate increases 10% per year. The landfill is closed at the end of the fourth year. Calculate the yearly gas production for 20 years after opening. What is the peak gas production in m3/yr.arrow_forward
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