Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Chapter 9, Problem 9.6P
To determine
The interest rate, the company must obtain on loan to just breakeven.
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How would you define solid waste?
State any three (3) factors which influence the amount of solid waste generated.
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(1) If the BOD5 of a waste is 220.0 mg/L and the ultimate BOD is 320.0 mg/L, what
is the rate constant?
Problem 6. A new manufacturing facility is being located in your town. It plans to produce 2,000
m³/day of a wastewater that consists primarily of water and the chemical phenol dissolved in it at
a concentration of 5 mg/L. Phenol has a chemical formula of C,H5OH. The company has asked
the municipal wastewater treatment to consider treating this industrial waste. Your plant currently
treats 30,000 m³/day with an average influent of 350 mg COD/L.
a) Estimate the increase in COD loading (kg COD/day) if you accept the industrial waste
discharge?
b) Estimate the additional amount of oxygen (in kg O2/day) needed to oxidize the phenol at the
treatment plant.
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- How many residences can be served? If we have a compactor truck which has a capacity of 30 yd3, each truck makes 3 trips/day 5 days a week, each residence has 3 people and each person produces 4lbs of waste. The density of the compacted waste is 425 lbs/yd3.arrow_forward2. 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)arrow_forward(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?arrow_forward
- Give two examples of scientific and technological approaches to managing solid waste on land and in water. Explain every example and include the sources you used.arrow_forwardQuestion 1 Municipal solid waste is generated within a community from several sources, not just the List and discuss these sources. In the town of Abesim, it is determined that the per capita waste generation rate is 1.4 kg(3.1 lb) per person per day. The collection is conducted once per week by the municipality. If the density of MSW in a typical trash container is 150 kg/m3, how many 120 L (30 gal) containers would be needed for a family of four? From (b), collection trucks have a capacity of 11.5 m3(15 yd3), which can compactthe waste to a density of 420 kg/m3. How many customers can a truck handle in a single run, before departing for the transfer station? In your community, is waste collection carried out by the municipality or by a privatehauler? Who collects the commercial wastes?arrow_forwardA waste-holding lagoon situated near the main plant of a chemicalcompany receives sludge on a daily basis. When the lagoon is full, it is necessary toremove the sludge to a site located 4.95 kilometers from the main plant. Currently,when the lagoon is full, the sludge is removed by pumping it into a tank truck andhauling it away. This process requires the use of a portable pump that has an initialcost of $800 and an 8-year life. The company can operate the pump at a cost of $25per day, but the truck and driver cost $110 per day.Alternatively, the company has a proposal to install a pump and pipeline to theremote site. The pump would have an initial cost of $600, a life of 10 years, and acost of $3 per day to operate. (a) If the MARR is 15% per year and the pipeline willcost $3.52 per meter to construct, how many days per year must the lagoon requirepumping to justify construction of the pipeline? (b) The lagoon was pumped40 times last year. Which alternative would have been cheaper?…arrow_forward
- Do you think that the storage in sanitary landfills is the best way of disposing our solid wastes? Explore this question scientifically, geopolitically, and practically. Do we have better options to replace that technology?arrow_forwardWaste management in residential areas served by the private sector on behalf of local government is operated through a.government contract. b.management contract. c. francais. d. granting monopoly right.arrow_forwardSuggest a treatment method on how to properly dispose your solid waste. How are you going to minimize your household solid waste?arrow_forward
- Assume that a material recovery facility has a conveyor belt (manual sorting unit) measuring 1,0 m width and an average belt speed of 18 m/min. Waste loading rate of the system is 12000 kg per hour and the average density of the waste on the conveyor belt is 80 kg/m3. Calculate the thickness of the waste on the conveyor belt and comment about this thickness.arrow_forwardWrite briefly about stages of Municipal solid waste process collection in an urban area.arrow_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 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 4arrow_forward
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Solid Waste EngineeringCivil EngineeringISBN:9781305635203Author:Worrell, William A.Publisher:Cengage Learning,
Solid Waste Engineering
Civil Engineering
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Cengage Learning,