Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 2, Problem 2.4P
To determine
A helpful letter to the editor as a solid waste engineer.
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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?
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- Using the energy content (wet basis) of the waste components given in the table below, calculate the overall energy content of the waste having the composition shown. You can assume 100 lb of waste to make this easier. Then determine the composition of the left-over waste if 80 % of the cardboard, 60% of the yard waste, 50% of the paper, 30 % of the metals and 20% of the plastics are recovered or recycled. How does this affect the total energy content of the discarded waste? How about the energy content per mass (wet weight)?arrow_forwardThe majority of municipal solid waste is 64% paper. What ways would you suggest to reduce paper waste?arrow_forwardWhat do you mean by Desulphurization of fuel oil?arrow_forward
- A sample of dry solid waste has the following composition: 531 g carbon (C), 133 g hydrogen (H), and 335 g oxygen (O). How many Litres of air is required to combust the waste? Answer: Checkarrow_forwardA truck dumped industrial waste into a pit. They found the truck 3 days ago with a pure pool of waste. Your lab finds the BOD5 of this waste to be 80 mg/L with a k=0.1/day. What was the waste source? Here are the 3 nearby suspects: Winery BOD ultimate = 275 mg/L Vinegar manufacturer BOD ultimate = 80 mg/L Pharmaceutical BOD ultimate = 200 mg/Larrow_forwardCalculate the annual volume of solid waste produced assuming the volume rate of generation of 1 kg per capita per day by a six workers. Given that the density of waste is 480 kg per cu. meter in a company?arrow_forward
- Write briefly about stages of Municipal solid waste process collection in an urban area.arrow_forwardPlastic bags at food stores have become ubiquitous. Often recycling advocates point to the plastic bags as the prototype of wastage and pollution, as stuff that clogs up our landfills. In retaliation, plastic bag manufacturers have begun a public relations campaign to promote their product. On one of the flyers (printed on paper) they say: The (plastic) bag does not emit toxic fumes when properly incinerated. When burned in waste-to-energy plants, the resulting by-products from combustion are carbon dioxide and water vapor, the very same by-products that you and I produce when we breathe. The bag is inert in landfills where it does not contribute to leaching bacterial or explosive gas problems. The bag photo degrades in sunlight to the point that normal environmental factors of wind and rain will cause to break into very small pieces, thereby addressing the unsightly litter problem. Find : Critique this statement. Is all of it true? If not, what part is not? Is anything misleading?Do…arrow_forwardWhat are three categories of waste that are managed in any society.arrow_forward
- Badly needed asap. Question about Materials Science and Engineering Explain: Reusing and Recycling of Engineering Materials.arrow_forwardEqual 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 Checkarrow_forwardSolid Waste Management On daily basis, and for six months a family brought to the home 60.0 lb of consumer good (food, newspaper, magazines, etc. The family consumes 10.0 lb of food that day, and 6.0 lb of food is stored. Paper is 35% of the waste produced and all of it goes to the fireplace except magazines. The magazines received represent 15 percent of the paper wastes of the day, and they are not thrown away. If bottles and cans represent 60% (by weight), and are recycled by the family. Twenty- eight percent of the paper waste (35 percent total) is burned in the fireplace. Calculate the following: A- The amount of solid wastes disposed from the home during one-day period. B- The amounts of bottles and cans that can be recycled over the six months' periodarrow_forward
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