The Sibzianna landfill serves a population of 253,000. Each week 325 trucks bring a total of 2180 t of MSW to the landfill. Each truck averages two loads per day. The trucks each have a capacity of 4.5 tons and operate 5 days per week. (a) How much MSW is generated per person? Give answer in kg/capita-day. (b) What is the average load (in metric tonnes) in each truck when they arrive at the landfill? At what capacity are the trucks operating? (c) If, the density of the waste is 265 kg m-3, what is the volume of MSW disposed of at the landfill each week?
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- Example 4 From the following data estimate the unit waste generation rate for a residential area consisting of approximately 1,000 homes. The observation location is a local transfer station, and the observation period is 1 wk. 1. Number of compactor truck kinds = 10 2. Average size of compactor truck = 20 yd³ 3. Number of flatbed loads = 10 4. Average flatbed volume = 1.5 yd³ 5. Number of loads from individual resident private cars and trucks = 20 Estimated volume per domestic vehicle = 8 ft³ (1 yd³= 27 ft³) 6. Solution 1. Set up the computation table (see Table 13 below). 2. Determine the unit waste generation based on the assumption that each household is comprised of 3.5 people. Estimation of unit solid waste generation rates Item No. of Ave. vol. Unit wt. Total wt lb loads 1b/yd3 Compactor truck 10 20 yd³ 350 Flatbed truck 10 1.5yd³ 150 Individual private vehicle 20 0.30 yd³ 100 lb= 0.454 kg Ans: 3.0 lb /capita/dayA town with 2,350 residents wants to establish a municipality owned and operated solid waste collection program. They can purchase one of three possible trucks that have the ff. characteristics: Truck A, 18 m^3 capacity Truck B, 15 m^3 capacity Truck C, 12 m^3 capacity If the truck is to collect the refuse for one-fifth of the town each day during a 5-day work week, then every residence will be collected during the week, and the truck will have to make only one trip per day to the landfill. Which truck or trucks will have sufficient capacity. Assume a rate of 1.75 kg/capita/d. Assume that the truck is able to compact the refuse to 350 kg/ m^3 What is the total tonnage of solid waste to be collected/wk? What is the total weight of waste to be collected everyday? What is the required truck capacity in cubic meters? Which truck should be bought?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.
- Suppose a city of 50,000 people generates 40,000 tons of MSW per year. At current recovery and recycling rates, 22 percent of that is recovered or recycled and the rest goes to a landfill. Suppose also that the landfill density is 1,000 lb/yd^3, cell depth is 10 ft, and 80 percent of the cell is MSW.(a) What lift area would be required per year?(b) If the current landfill site covers 50 acres, including 10 acres needed for access roads and auxiliary facilities, and two more lifts are envisioned, how long would it take to complete this landfill?The City of Forty-Five (population 465,565) has requested your assistance in evaluating its solid waste collection system. Determine the mean time per collection stop plus the mean time to reach the next stop, the number of pickup locations per load, and the minimum number of trucks the city must own. The City of Forty-Five collection data are as follows: Average truck capacity = 12.5 m3; Average observed compaction ratio = 2.87 Crew size = 2; Number of pickups = 1 /wk (no rear-of-house service) Average number of cans per stop = 2.63/wk at 0.1136 m3/can Average number of residents per stop = 5 Average uncompacted density = 105.76 kg/m3 Average transport time to disposal site including delays and dumping = 1.78 h/trip Average number of trips to disposal site = 2/d; Rest breaks = 2 at 28.0 min Average maintenance downtime = 37.0 min/d; Average workday = 8.00 h Average percent of trucks out of service for major repairs = 15.0% Number of workday per week = 52. 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. A sanitary landfill has available space of 16.2 ha at an average depth of 10 m. Seven hundred sixty-five (765) cubic meters of solid waste are dumped at the site 5 days per week. This waste is compacted to twice its delivered density. Draw a mass balance diagram and estimate the expected life of the landfill in years.Can I get a thorough step by step for the following question? A sanitary landfill has available space 25 ha at an average depth 12 m. Nine hundred sixty-five (965) cubic meters of solid waste are dumped at the site each day for 5 days per week. This waste is compacted to twice its delivered density. Draw a mass-balance diagram and estimate the expected life of the landfill in years.In a suburban area of a city, the total time dedicated to waste collection is, on average, 100 times greater than the combined average time it takes for each stop's collection and the time it takes to reach the next stop. If a waste collection truck has a compaction ratio of 2 and can transport a maximum of 8 (m3) of compacted solid waste per trip, what is the truck's average load volume for each collection in (L)?\
- Font (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?A world class island in Caribbean of about 500 hectares was bought by Tory Burch . Currently, it is occupied by 35000 persons generates refuse at an average rate of 2 lb / capita/day. As a way of giving back to the community, she save the 55 ac area as a landfill site, with an average depth of compacted refuse limited to 20 ft. TB estimated that the compacted refuse will have a unit weight of 580 lb/yard3 and that 75% of volume will be taken up by the compacted refuse. What is the estimated total volume per year?(yard3/year) Select the correct response: 55065 none of the choices. 33456 23456 45675From 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 ft3