Solid Waste Engineering: A Global Perspective, Si Edition
3rd Edition
ISBN: 9781305638600
Author: William A. Worrell, P. Aarne Vesilind, Christian Ludwig
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.
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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(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?
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Solid Waste Engineering: A Global Perspective, Si Edition
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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_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
- 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_forwardDo 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_forwardSuggest a treatment method on how to properly dispose your solid waste. How are you going to minimize your household solid waste?arrow_forward
- Write briefly about stages of Municipal solid waste process collection in an urban area.arrow_forwardAssume 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_forwardFrom the following date, estimate the unit waste disposal rate per week for a residentialarea consisting of 1200 homes. The average occupancy is 4 persons per home. Theobservation location is a local transfer station that receives all of the wastes collected fordisposal. The observation period was one week.Data:Number of compactor truck loads = 10Average size of compactor truck = 20 yd3Number of flatbed loads = 6Average flatbed volume = 3 yd3Number of loads from individual residents’ private cars and trucks = 20 Estimatedaverage volume per domestic vehicle = 9 ft3arrow_forward
- If the BOD4 of a waste is 200.0 mg/L and the ultimate BOD is 270.0 mg/L, what is the rate constant at 10⁰C.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_forwardDescribe the different types of domestic solid waste.arrow_forward
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