Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Question
Chapter 2, Problem 2.16P
To determine
The effect in moisture content when yard waste collected separately.
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Briefly describe how the moisture content of waste is determined.
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A yard waste composting windrow has a triangular cross section and is 10 feet wide at the base
and 10 feet high at the peak and 100 feet long. You may assume the waste has a specific
weight of 400 lb/yd^3 as placed in the windrow. The waste material is 40-percent biodegradable
and has the ultimate composition of C60H95O40N. Determine the amount of oxygen required to
stabilize the waste. Assume the aerobic degradation can be expressed as:
(4a + b — 2с + 3dу
b - 3d
02 → aco2 +
H20 + DNH3
2
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- Suggest a treatment method on how to properly dispose your solid waste. Explainarrow_forwards) You are setting up a composting batch and have 8 tonnes (metric tons) of poultry litter with a C:N of 14, a dry weight % of N of 2.7%, density of 500 kg/m³, and a moisture content of 33%. You are aiming for a C:N of 25:1 for optimal composting performance, so you are considering several options of other wastes to make up your batch. The following table shows the moisture content, C:N and cost per tonne of each material. You estimate that you will lose 20% of the initial mass during the composting process. Determine which would provide the best return on investment if you can sell your compost for $80/m³ and the density of the finished compost is 400 kg/m³. Waste Type Shredded newsprint Sawdust RDF Moisture content 18 40 45 C:N Dry % N 152 0.2 530 0.1 60 1.1 Cost/tonne $200 $110 $80arrow_forwardA yard waste composting windrow has a triangular cross section and is 10 feet wide at the base and 10 feet high at the peak and 100 feet long. You may assume the waste has a specific weight of 400 Ib/yd^3 as placed in the windrow. The waste material is 40-percent biodegradable and has the ultimate composition of C60H95040N. Determine the amount of oxygen required to stabilize the waste (show all work for full credit). Assume the aerobic degradation can be expressed as: (4a + b - 2с + За 02 b - 3d aco, + ("). H20 + dNH3 CaH¿0̟Na + 4 2arrow_forward
- The ABC Citizens Waste Water Treatment Plant uses ferric chloride. a) What is it used to remove from the wastewater?b) In which process is the ferric chloride added?arrow_forward6-1. Assume that refuse has a C/N ratio of 24:1. If raw sludge with a C/N of 16:1 is to be added to refuse to reach a required C/N of 20:1, how much of each-refuse and sludge-is needed? (Note: Use a wet weight basis.)arrow_forward
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