The solid-waste composition and the quantity of solid waste generated from two cities located in the developing world are shown in Table Q1b as follows: Table Q1b. The solid-waste composition and the quantity of solid waste generated from two cities. Component City 1 City 2 Food waste (%) 47.0 65.0 Paper and cardboard (%) 6.5 7.5 Ash (%) 39.0 10.0 Other (%) 7.5 17.5 Waste generation rate (kg/person-day) 0.40 0.350

The solid-waste composition and the quantity of solid waste generated from two cities located in the developing world are shown in Table Q1b as follows: Table Q1b. The solid-waste composition and the quantity of solid waste generated from two cities. Component City 1 City 2 Food waste (%) 47.0 65.0 Paper and cardboard (%) 6.5 7.5 Ash (%) 39.0 10.0 Other (%) 7.5 17.5 Waste generation rate (kg/person-day) 0.40 0.350

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter2: Municipal Solid Waste Characteristics And Quantities

Section: Chapter Questions

Problem 2.6P

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Example 5-3 Using the typical percentage distribution data in the given table below, estimate the number of Kj/Kg of the remaining solid wastes if 90 percent of the cardboard and 60 percent of the paper were recovered by homeowner Component Percent by weight Organic food wastes 9.0 Paper 34.0 Cardboard 6.0 Plastics 7.0 Textiles 2.0 Rubber Leather Wood 0,5 Yard wastes 18.5 Inorganic Glass 0.5 2.0 8.0 Tin cans 6.0 Aluminum 0.5 Other metal 3.0 Dirt, ash, etc. 3.0 Total Energy kJ/kg Total energy Kj 4720 16747.2 16282 32564 17445 23260 17445 6512.8 18608 139.5 697.5 697.5 6975 42480 570000 97692 227948 34890 11630 8722.5 120486.8 37216 1116 4185 2092.5 20925
TABLE 3-4 Typical physical composition of residential MSW excluding recycled materials and food wastes discharged with wastewater (1990) Percent by weight Component Organic Food wastes Paper Cardboard Plastics Textiles Rubber Leather Yard wastes Wood Misc. organics Inorganic Glass Tin cans Aluminum Other metal Dirt, ash, etc. Total United States" Range 6-18 25-40 3-10 4-10 0-4 0-2 0-2 5-20 1-4 4-12 2-8 0-1 1-4 0-6 Typical' 9.0 34.0 6.0 7.0 2.0 0.5 0.5 18.5 2.0 8.0 6.0 0.5 3.0 3.0 100.0 Packaging materials 79,5 50-60 12-16- 4-8 20-30 6-8 2-4 Davis, Californiad 6.0 33.1 7.9 10.7 2.4 2.5 0.1 17.7 5.0 0.4 5.8 3.9 0.4 3.6 0.5 100.0 = 20.5 a Adapted in part from Refs. 2, 3, 9, and 14-16. Reported percentage distributions are exclusive of special and hazardous wastes. Twenty percent of the households in the United States are assumed to have food waste grinders. Additionally, it is assumed that the percentage of food waste ground up and discharged with wastewater is 25 percent. Current (1990)…
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? 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 18,600 700
From the following date, estimate the unit waste disposal rate per week for a residential area consisting of 1200 homes. The average occupancy is 4 persons per home. The observation location is a local transfer station that receives all of the wastes collected for disposal. The observation period was one week. Data: Number of compactor truck loads = 10 Average size of compactor truck = 20 yd³ Number of flatbed loads = 6 Average flatbed volume = 3 yd³ Number of loads from individual residents' private cars and trucks = 20 Estimated average volume per domestic vehicle = 9 ft³
Choose the correct answer Which of the following wastes is the most recycled in the United States? A.Car batteries; B.Paper; C. Soda cans; D. Yard wastes Which is the primary disposal method for municipal solid waste in the United States? A. incineration; B. recycling; C. landfill; D. none of the above What is (are) the major environmental concern(s) during landfilling?A.gas production. B. leachate generation. C. A and B. D. neither of A or B. The gases produced from landfills are encouraged to be used as a new energy. Which of the following in the landfill gases is (are) the effective ingredient as an energy source? A. carbon dioxide and methane; B. carbon monoxide and methane C.methane; D. carbon dioxide
Column 1 represents the fraction of the SW type in the total SW, Column 2 shows how many percent of the type of SW was recycled/recovered, Column 3 represents how many percent of the type of SW was combusted, and Column 4 shows the density of the type of SW. The volume of waste residue after combustion was negligible. 1) What is the total volume of SW that was landfilled? What is the average of density of the SW that was landfilled? 2) Usually, SW was compacted by some special equipment before landfilling. Also, because of the gravity from the other SW and cover material that was located above, the SW in a landfill was compressed, more or less. As a result, the volume of SW was decreased. Different sorts of SW exhibit different volume reduction behaviors. Column 5 is compact ratio, indicating the volume reduction. Compaction ratio = Volume before compaction/Volume after compaction. Please compute total volume and the average of density of the COMPACTED SW that was landfilled. 3) How…
2. A municipal solid-waste site for a city must be located at Site A or Site B. After sorting, some of the solid wastes will be transported to an electric power plant where it will be used as fuel. Data for the hauling of solid wastes from each site to the power plant are shown in Table below SITE B 3 kilometers P100,000 SITE A Average hauling distance Yearly rental fee for solid - P5,000 waste site Hauling Cost 4 kilometers P1.50 per m - km P1.50 per m - km If the power plant will pay P8.00 per mºof sorted solid waste delivered to the plant, where should the solid-waste site be located? Use the city's viewpoint and assume that 200,000 m3 of wastes will be hauled to the plant for one year only. What site must be selected? Show your computation and defend your answer. (20 points)
1. What are the factors that contribute to the variations in composition of solid waste? Discuss them.2. Define Integrated Solid Waste Management (ISWM) and Municipal Solid Waste (MSW).
Can I get a thorough step by step for the following question? The US EPA requires hazardous waste incinerators to meet a standard of 99.99% destruction and removal of organic hazardous constituents injected into the incinerator, which is referred to as "four nines DRE". The efficiency is calculated by measuring the mass flow rate of organic constituents entering the incinerator and the mass flow rate of constituents exiting the incinerator stack, as shown in Figure 1. Draw a mass-balance diagram and determine the allowable quantity of contaminant in the exit stream if the incinerator is burning 1.2000 g/s of hazardous constituents. If the incinerator is 96% efficient in destroying the hazardous constituents, what scrubber efficiency is necessary to meet the EPA standard?
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
What is the Comparison or contrast of waste management of Solid and Liquid waste in the United States
Using the RCRA hazardous waste lists, determine whether the following are hazardous wastes using the RCRA listing procedure. If it is a listed waste, state the waste number. If is is not a hazardous waste, state why not. Assume that the industry producing the waste is a RCRA hazardous waste generator. 1. 2800 kg per month of acetone waste generated as the result of metal parts washing. 2. 5.7 million L/day of 150 mg/L trichloroethylene in an industrial waste stream being discharged to a municipal wastewater treatment plant. 3. 235 kg of endrin that is being disposed of because it is off-specification and out of date.