Solid Waste Engineering
3rd Edition
ISBN: 9781305635203
Author: Worrell, William A.
Publisher: Cengage Learning,
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Question
Chapter 2, Problem 2.14P
To determine
The overall moisture content of the waste.
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- Describe the different types of domestic solid waste.arrow_forwardThe 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 = 5arrow_forwardBriefly describe how the moisture content of waste is determined.arrow_forward
- Please Elaborate on the topic of "Solid Waste Characteristics and Solid Waste Management"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_forwardA writtine conclusion about solid waste, liquid waste and gastreous wastearrow_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_forwardHow would you define solid waste? State any three (3) factors which influence the amount of solid waste generated.arrow_forwardA waste with a 5-day BOD (BOD)=200mg/L and k = 0.1 day¹ is discharged to a river at a rate of 1 m/s. The river has flow rate of 9 m/s and a background ultimate BOD (Lo) of 2 mg/L upstream of the discharge. (a) Calculate the ultimate BOD (Le) of the waste. (b) Furthermore, assuming instantaneous mixing after discharge, calculate Lo of the river water after it has received the waste. Ans.: (a) Ultimate BOD of wastewater = 508.3 mg/L, (b) Ultimate BOD of river water after discharge of waste-52.63 mg/L.arrow_forward
- A sample of refuse has a moisture content of 20%. A 1.2 g sample is placed in a calorimeter, and a gross calorific value of 14,400 kJ/kg is measured based on the temperature rise. Further analysis shows that .3 g of ash remains in the bomb calorimeter after combustion. Calculate the HHV in terms of (a) moisture-free and (b) moisture- and ash-freearrow_forwardIf the bicarbonate concentration of a leachate is 1000 mg/L and the pH measured in the field is found to be 5.8, estimate the partial pressure of the carbon dioxide within the landfill.arrow_forwardA lagoon with volume of 1200m3 has been receiving a steady flow of a conservative waste at a rate of 100m3/d for a long enogh time to assume steady state conditions. The waste entering the lagoon has concentration of 10.0mg/l. Assume completly mixed conditions. a) What is the concentration of the pollutant in the efluent? b) The input was concentration of is suddenly increased to 100mg/l. Using sprreadsheet, compute and graph the concentration in the effluent over time. Show hand calculation for the effluent concentration 7 days after the change inpute waste concentrationarrow_forward
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