Solid Waste Engineering
3rd Edition
ISBN: 9781305888357
Author: Worrell
Publisher: Cengage
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Question
Chapter 2, Problem 2.17P
To determine
The overall energy content of the waste.
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*: Determine the energy Value of typical municipal solid wastes with
the average composition shown in Table below
Solution
1.
Assume the heating value will be computed on an as-discarded
basis.
2.
Determine the energy value using a computation table
Computation of energy contents
Component
Solid Wastes
Energy
Total energy Btu
% lb.
Btu/lb
Food waste
15
2,000
Paper
40
7,200
Cardboard
7,000
Plastics
3
14.000
Textile
2
7,500
Rubber
0.5
10,000
Leather
0.5
7,500
Garden trimming
12
2,800
Wood
8,000
Glass
8
60
Tin cans
6.
300
Non ferrous
1
Ferrous
300
Dirt, Ash,and
4
3,000
brick
Ans: 4762Btu/lb
The population in Camilia Apartment is 3500 and solid waste is collected on
Sunday and Wednesday in the morning. Determine the waste generation rate
by using data in TABLE Q4 (b). Determine the volume of storage
containers that required for the apartment with density of waste is 310 kg/m³.
House number Family size
4
5
2
6
1
1-5
2-12
3-5
4-9
5-5
Amount of Solid Waste (kg)
Day 2 Day 3 Day 4 Day 5 Day 6 Day 7 Day 8
7.2
7.3
7.1
5.4
5.6
6.5
6.1
6.2
7.1
7.8
4.2
4.4
3.1
9.3
0.9
7.3
3.2
6.7
1.4
7.5
-Tirlin
2.5
9.1
1.3
6.5
2.1
ia-
9.2
1.5
1.3
válcálcáls
8.3
3.5
8.5
1.1
10.1
1.2
(a) Calculate the ultimate BOD of a waste that has a measured 5-day BOD of 20 mg/L, assuming a BOD rate coefficient of 0.15/day measured at 20 degrees C.
(b) Estimate the rate coefficient if the temperature of the waste is raised to 30 degrees C.
(c) What would be the BOD5 at 30 deg. C?
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- How much hydrochloric acid (kg/d) is required to neutralize a waste with 20 mg/L NAOH and a flowrate of 220 L/min?arrow_forwardQ4 Estimate the energy content of a solid waste sample with the composition below and what is the content on a dry basis and on ash free dry basis? Component Percent by mass Energy kJ/kg Food waste Paper Cardboard Plastics Garden trimming Wood Tin cans Total 15 45 10 10 10 5 5 100 Based on 100 kg sample of waste Moisture content% 70 6 5 2 60 20 3 4,650 16,750 16,300 32,600 6,500 18,600 700arrow_forwardA city receives 42 tons per day of a solid waste stream with chemical formula C4H17O to their waste to energy facility each day. Estimate the air requirements to combust this waste in cubic ft per day. Assume specific weight of air is 0.075 lb/cu ft and that air is 21% oxygen by weight.arrow_forward
- CHAPTER 7 WASTE HANDLING AND SEPARATION, STORAGE AND PROCESSING AT THE SOURCE Q4 Estimate the energy content of a solid waste sample with the composition below and what is the content on a dry basis and on ash free dry basis? Percent by mass Moisture content % Component Energy kJ/kg Food waste Paper Cardboard Plastics Garden trimming Wood Tin cans Total 15 45 10 10 10 5 5 100 Based on 100 kg sample of waste 70 6 5 2 60 20 3 4,650 16,750 16,300 32,600 6,500 18,600 700arrow_forward7-2. Estimate the maximum amount (by weight) of material that could be separated for recycling from residential MSW using a two-container system. What should be the size of the two containers? Use the waste composition given in Table 3-4, and assume that there are 3.1 residents per residence.arrow_forwardEstimate the energy content of solid waste sample with the composition given in a table below. What is the content on dry basis and ash free dry basis?arrow_forward
- In a city, the population to be served: 78,320 and per capita waste generation is 0.85 kg/capita/day in addition to 0.96 kg/capita/day is generating from two temporary residences camp including 100 capita, around of four private houses each one comprise 13 residences and per capita waste generation is 1.1 kg/capita/day. Calculate the quantity of waste produced in tons during 6 months (month is 30 days)arrow_forwardEstimate the total theoretical amount of air that would be required under aerobic conditions to oxidize completely an organic waste with a chemical formula of C120H180O80N2.arrow_forwardQ: Assume a rough estimate of MSW composition is as follows: % by weight Moisture content (%) Paper (assume dry mass all cellulose, C6H10O5) 40 8% Glass 10 - Steel 10 - Aluminum 10 - Food waste (assume dry mass all sugar, C6H12O6) 30 80% a) If 20,000 metric tonnes of this waste is for anaerobic digestion, how much methane gas would theoretically be produced? b) If 20,000 metric tonnes of this waste is for aerobic composting. How much oxygen would theoretically be demanded?arrow_forward
- Calculate the ultimate BOD of a waste that has a measured BOD5 of 24.6 mg·L-1, assuming a BOD rate coefficient (k) of 0.13 day-1.arrow_forwardCalculate the ultimate BOD of a waste that has a measured 5-day BOD of 20 mg/L, assuming aBOD rate coefficient of 0.15/day.arrow_forwardRecall 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_forward
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