Solid Waste Engineering
3rd Edition
ISBN: 9781305888357
Author: Worrell
Publisher: Cengage
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Chapter 6, Problem 6.3P
To determine
The empirical formula for the organic fraction of refuse and the theoretical production of methane from this hypothetical compound.
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- Problem 14:An underground hard rock mine operation employs a 8 -m3 skip with an 14-tonne capacity to hoist ore to the surface. The blasted ore passes through the crusher to obtain small fragment size before loading of the skip takes place. The crushed ore is moist and has the following properties:Dry bulk density = 2300 kg/m3 Water content = 16%The mine is considering running the operation without the crusher. This means that the blasted ore of considerably larger size will be loaded directly into the skip. The blasted ore is moist and has the following properties:Dry bulk density = 1750 kg/m3Void ratio = 0.75Degree of saturation = 22%(a) Determine the wet bulk density of the crushed ore.(b) Determine the wet bulk density of the blasted ore.(c) Determine if the hoisting productivity of the skip will be affected by this change.(d) Estimate the bank weight of the rock using a % swell of 40%.arrow_forwardChoose the correct answer Which of following properties of a contaminant are used to examine whether it is a DNAPL? A. Density and viscosity; B. Density and solubility; C. Henry’s law constant; D. all of the above Which of the following is a correct description about stabilization within landfills? A. Stabilization is the process in which gas and leachate in solid waste are produced; B. Stabilization is the process in which inorganics in solid waste is decomposed by microbes; C. Stabilization is the process in which organics in solid waste is decomposed by microbes; D. Stabilization is the process in which heavy metals in solid waste is adsorbed. Ratio of TCE’s partial pressure to TCE’s concentration in water is usually constant at equilibrium. However, the ratio may be changed when which of the following is changed? A. Temperature; B. TCE’s partial pressure; C. TCE’s concentration in water D. all of the above Which of the following can be…arrow_forwardChoose the correct answer Which of the following can be used to determine the transport velocity of landfill leachate in subsurface? A.Darcy’s law; B. Henry’s law; C. Mass balance; D. Langmuir model Which of the following descriptions is NOT correct at 1 atm and 0oC? 200 g CO2, 200 g CH4, and 200 g N2O gases have the same volumes; 200 moles CO2, 200 moles CH4, and 200 moles N2O gases have the same volumes; 1 mole CO2 gas has a volume of 22.4 L; CO2 has a lower global warming potential than CH4arrow_forward
- Read the question carefully and Give me right solution. The fractional collection efficiencies with weight distribution in the given particle size range. ranges are given below for collector, in percent: device A, 10-20 micron-40 percent, 20-30 micron - 64 percent, 30-40 micron - 72 percent, 40-50 micron- 80 percent, and 50-80 micron - 92percent. Determine the overall collection efficiency based on mass for device A.arrow_forwardIn determination of Hardness, If the volume of EDTA (0.02N) is 17.8 mL, the Volume of sample is 20 mL and the EW of CaCO3 is 50.Calculate the total hardness as mg (CaCO3)/Larrow_forwardA solid waste exhibits the characteristic of toxicity if it contains an elevated level of a toxicity contaminant. What is the purpose of TCLP test? Write down the brief procedure for carrying out TCLP test on solid samples.arrow_forward
- An effluent stream sample (500 mL) from a metal-working facility contains 0.52 g nickel sulphate. (i) What is the nickel concentration of this effluent stream (in mg/L)? (ii) Would you regard this concentration as suitable for discharge to the local sewage system? (iii) How much total nickel (in kg) leaves the facility per year in this stream if ~1 ML of effluent is produced?arrow_forwardA waste has an ultimate BOD of 1,000 mg/L and a kL of 0.1/day. What is its 5-day BOD?arrow_forwardFor the sample of solid wastes with the typical comp osition given in the following Table component Food Раper Card Plastic Textile Rubber Leath Garden Wood Glass Tin Non Ferro- Drift waste board trimmin er cans us ferrous -gs metals ashes metals bric k.etc Moisture 15 6 2 2 10 60 20 3 2 3 content % Dry 4.5 37.6 3.8 2.9 1.8 0.5 0.4 4.8 1.6 7.8 5.8 1.0 1.9 3.7 weight, Ib Determine : Moisture content of Textile (X) waste if the Overall moisture content ( 21.9 %).arrow_forward
- According to the Worrell and associates, the bulk density of refuse compacted in a landfill without cover ranges from__. lb/yd³. 600 to 900 750-1250 150 to 250 1200 to 1400arrow_forward(b)Calculate the quantity of lime and soda required for softening one million litre of thefollowing sample of water. If the purities of lime and soda are 80% and 85%respectively. The impurities are Silica = 75 mg/lit. MgCl2 = 19 mg/lit. MgSO4 = 30mg/lit. CaSO4 = 68 mg/lit. MgCO3 = 884 mg/lit. CaCO3 = 120 mg/lit.(c) Discuss different chemical methods which have been used for the synthesis ofnanomaterial with special reference to temperature and solvent along with theiradvantages and disadvantages.(d) Doping can be used to increase conductivity of the substances, explain with examples.What are array and modules? Discuss their working.arrow_forwardWhich parameters may have effect on the bulk density of municipal solid wastes? Explain it by giving examplesarrow_forward
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