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Q1: Unit 8 Question Welcome to Unit 8. In our previous unit, we learned about how to perform statistical modeling for engineered air quality, as well as to finish our air quality permit engineering calculations and analyze those calculated outcomes against the permit limits of the given state's Department of Environmental Quality (DEQ) office. For this final unit, we will be learning to utilize pollution control technologies for engineered air quality control. This means that you can now consider the available air pollution control options, and mentally select which technologies would have been most appropriate for the work system that you just quantitatively analyzed for an air permit. Use APA FormatSee Answer
Q2:Question 1 An electrostatic precipitator has 3 ducts with plates 12 ft long and 10 ft high. The plates are 8 inches apart. Assuming a drift velocity (Le terminal velocity in an electrical field) of 0.4 ft/s, calculate the efficiency (in fractions, i.e., 0-1) if one duct is fed 40% of the gas and the other two 30% each. The total volume flow rate to be treated is 4000 acfm. Note: In each duct, both inner sides of the plates should be counted for the collection area. Add your answer Integer, decimal, or E notation allowed 199 30 % 20 Points 10 ftSee Answer
Q3:Question 2 8 Points A 7-compartment baghouse for a cement kiln operates under the following conditions: K₁ = 0.5 in H₂O/(ft/min), K₂ = 0.001 in H₂O-ft-min/gr, dust loading of 30 gr/ft³, run time = 8 min, cleaning time = 2 min. What is the maximum velocity this baghouse will experience (in ft/min)? Add your answer Integer, decimal, or E notation allowedSee Answer
Q4:8 Points Question 2 A 7-compartment baghouse for a cement kiln operates under the following conditions: K₁ = 0.5 in H₂O/(ft/min), K₂ =0.001 int H₂O-ft-min/gr, dust loading of 30 gr/ft³, run time = 8 min, cleaning time = 2 min. What is the maximum velocity this baghouse will experience (in ft/min)? Add your answer Integer, decimal, or E notation allowedSee Answer
Q5:Question 7 4 Points A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). The system is to operate at 90 °F and 1 atm and flow velocity of 100 ft/min, calculate the pressure drop if 4x10 carbon is used (in inch of water). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft³. The bed depth should be at least 1 ft. Add your answer Integer, decimal, or E notation allowedSee Answer
Q6:Question 1 How would you increase the efficiency of an ESP? A Increase collection surface area. B F Increase air flow rate Increase drift velocity Increase the strength of the electrical field Increase temperature a, c, and d (G) a, d, and e H All of the above (a-e). 4 PointsSee Answer
Q7: ト i. CVEN 4334 Environmental Project (Presentation and Report) Introduction Indoor and Outdoor Air Quality Air pollution Examples Reduction Procedures/Control Methods Air Regulation and Laws in World Related Laws and Regulation in Saudi Arabia Your Understanding and Recommendation Need to make PPT 6-7 slides with the speaker notes Topic-any two pollutants in air Like carbon monoxide -Follow the guidelineSee Answer
Q8: 1. A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb. hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). If the system is to operate at 90 °F and 1 atm and flow velocity of 100 ft/min, determine the diameter of each carbon bed (in ft). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft³. The bed depth should be at least 1 ft. 2. A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). If the system is to operate at 90 oF and 1 atm and flow velocity of 100 ft/min, determine the mass of carbon (in lb). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft³. The bed depth should be at least 1 ft. 3. A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). The system is to operate at 90 °F and 1 atm and flow velocity of 100 ft/min, calculate the pressure drop if 4×10 carbon is used (in inch of water). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft³. The bed depth should be at least 1 ftSee Answer
Q9: Based on the information provided below, make sure to make the PPT of 6 slide in APA referencing style The Scenario: You have contracted with an industrial organization to engineer and write a state air Permit by Rule (PBR) evaluation for a vehicle painting operation facility. According to the local state laws and U.S. Environmental Protection Agency (EPA) laws, the facility must have an air permit before construction begins. Once the facility is completed, the construction air permit will then become the operational air permit for the facility. As a result, your client wants the air permit to automatically align the painting operation facility into operational compliance with state and federal air quality laws. Consequently, it is extremely important for you to evaluate the planned painting operation against the PBR requirements in order to meet the air permit criteria, using the state guidance document and considering the equipment and chemicals already planned for the facility operations. You have tabulated the following information from what you have gleaned from each of the materials' SDS documents and equipment technical data sheets as a plan (each "unit" represents a single vehicle): Interior Liner Coating Material 10 gallons coating/unit 2 gallons of solvent/unit Unit Lining Application Unit Lining Curing Interior Liner Cure Unit Lining Design Exhaust Fan Air Makeup Unit Apply interior liners to two (2) units/day Cure interior liners of two (2) units/day Heater fuel source is natural gas-fired drying oven Cross-draft air plenum 10,000 ft/min (CFM) 5760 ft/min (CFM) Filter Openings Coating WV 20.0 ft² each VOC content Coating VM Coating volume Water Content Per gal/coating Work five (5) hours/day and four (4) days/week Work five (5) hours/day and four (4) days/week Heater generates 2.1 million (MM) Btu/hr at maximum 2,500 hrs/year Unit interior is the spray area 1 exhaust fan 1 air makeup system Two (2) filter openings 2.8 lb/gal coating 1.0 gal 1.0 lb/gal Water Density Per gal/water Coating VW Water volume 8.34 lb/gal Calculation Exempt-solvent Content Per gal/coating 0.5 lb/gal Exempt-solvent Density Per gal/exempt solvent 6.64 lb/gal Coating Ves Exempt solvent volume Calculation Additionally, your state's department of environmental quality (DEQ) has provided you the following PBR limits: Potential to Emit (PTE) 100 tons VOC/year Face Velocity 100 ft/min Filter Velocity 250 ft/min VOC/5-hour period 6.0 lbs/hr Short-term Emissions 1.0 lbs/hr Long-term Emissions 1.0 tons/yr From your first visit with your client, these are your notes and process flow sketch reflecting the intended operational design: • • • The client has designed an interior coating spray painting system that allows the interior of each unit to be coated. The operations will involve a stripped-down unit being brought into the facility's shop. The shop is a steel building with a finished concrete floor and a paint booth for each unit. The unit will be placed in the spray booth. The booth will be opened at one end of the booth for makeup air. The exhaust air will flow through an exhaust chamber at the other end of the unit. For each unit, once the liner application operations are completed, the forced curing (drying) operations will immediately commence. Booth Exhaust ChamberSee Answer
Q10:Based on the information provided below , make sure to make the PPT of 6 slide in APA referencing style The Scenario: You have contracted with an industrial organization to engineer and write a state air Permit by Rule (PBR) evaluation for a vehicle painting operation facility. According to the local state laws and U.S. Environmental Protection Agency (EPA) laws, the facility must have an air permit before construction begins. Once the facility is completed, the construction air permit will then become the operational air permit for the facility. As a result, your client wants the air permit to automatically align the painting operation facility into operational compliance with state and federal air quality laws. Consequently, it is extremely important for you to evaluate the planned painting operation against the PBR requirements in order to meet the air permit criteria, using the state guidance document and considering the equipment and chemicals already planned for the facility operations. You have tabulated the following information from what you have gleaned from each of the materials' SDS documents and equipment technical data sheets as a plan (each "unit" represents a single vehicle): Interior Liner Coating Material 10 gallons coating/unit 2 gallons of solvent/unit Unit Lining Application Apply interior liners to two (2) units/day Work five (5) hours/day and four (4) days/week Unit Lining Curing Cure interior liners of two (2) units/day Work five (5) hours/day and four (4) days/week Interior Liner Cure Heater fuel source is natural gas-fired drying oven Heater generates 2.1 million (MM) Btu/hr at maximum 2,500 hrs/year Unit Lining Design Cross-draft air plenum Unit interior is the spray area Exhaust Fan 10,000 ft3/min (CFM) 1 exhaust fan Air Makeup Unit 5760 ft3/min (CFM) 1 air makeup system Filter Openings 20.0 ft2 each Two (2) filter openings Coating WV VOC content 2.8 1b/gal coating Coating VM Coating volume 1.0 gal Water Content Per gal/coating 1.0 1b/gal Water Density Per gal/water 8.34 lb/gal Coating VW Water volume Calculation Exempt-solvent Content Per gal/coating 0.5 1b/gal Exempt-solvent Density Per gal/exempt solvent 6.64 lb/gal Coating Ves Exempt solvent volume Calculation Additionally, your state's department of environmental quality (DEQ) has provided you the following PBR limits: Potential to Emit (PTE) 100 tons VOC/year Face Velocity 100 ft/min Filter Velocity 250 ft/min VOC/5-hour period 6.0 lbs/hr Short-term Emissions 1.0 lbs/hr Long-term Emissions 1.0 tons/yr From your first visit with your client, these are your notes and process flow sketch reflecting the intended operational design: · The client has designed an interior coating spray painting system that allows the interior of each unit to be coated. . The operations will involve a stripped-down unit being brought into the facility's shop. · The shop is a steel building with a finished concrete floor and a paint booth for each unit. · The unit will be placed in the spray booth. . The booth will be opened at one end of the booth for makeup air. · The exhaust air will flow through an exhaust chamber at the other end of the unit. · For each unit, once the liner application operations are completed, the forced curing (drying) operations will immediately commence. Booth Exhaust ChamberSee Answer
Q11:Question 1 a) A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). If the system is to operate at 90 °F and 1 atm and flow velocity of 100 ft/min, determine the diameter of each carbon bed (in ft). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft3. The bed depth should be at least 1 ft. b) A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). If the system is to operate at 90 oF and 1 atm and flow velocity of 100 ft/min, determine the mass of carbon (in lb). Bed regeneration and cooling will require one hour. Assume carbon density is 25 Ib/ft3. The bed depth should be at least 1 ft. c) A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8 lb hexane per 100 lb carbon under the conditions at which the system will be operated (net adsorption). The system is to operate at 90 °F and 1 atm and flow velocity of 100 ft/min, calculate the pressure drop if 4×10 carbon is used (in inch of water). Bed regeneration and cooling will require one hour. Assume carbon density is 25 lb/ft3. The bed depth should be at least 1 ftSee Answer
Q12:Problem 1. (PM terminal settling velocity) Calculate terminal settling velocity (V) values for ammonium sulfate ((NH4)2SO4) particles versus particle diameter (d) at: 20°C and 760 mm Hg for dry air. Particle diameter ranges from 0.001 μm ≤d₂ ≤ 10 um. Plot Ve versus da for the described conditions in a plot with Vte on the ordinate and d on the abscissa. Use log scales for both axes. | Solution hints: Follow the steps in example class worksheet problem 2 (Wednesday-Week 4). Calculate Vi by assuming the gas flow is in Stokes region and particles are spherical. Check Stokes region assumption by calculating the particle Reynolds Number (Rep).See Answer
Q13:Problem 2. (Filtration) A fabric filter will be used downstream of a spray dryer to remove particulate material from a gas stream. Actual concentration of particulate matter is 10 g/m³ upstream of the fabric filter. A pilot plant was built and operated downstream of the spray dryer to characterize the behavior of the filter cake and fabric under actual conditions. Pilot plant data are presented below.See Answer
Q14:Problem 3. (ESP) A single stage ESP operates with a voltage of 22 kV. The spacing between the collection electrodes of this single channel ESP is 10.0 cm and the anode-cathode spacing for the ESP is 5.0 cm. a) Calculate the electric migration velocity (wp) in m/s at 25°C in air for particles with the diameter 0.05 um, 0.5 µm and 5 µm. Assume the dielectric constant of the particles. Dp². is 10. Pressure is 1 atm. b) What assumption was made in the derivation of the equation for that may not be valid in for the calculation of the solution in a)? How would the calculated wp for the 0.05 µm particles change if we did not use that assumption? No need to calculate the value of wp. just describe the direction of its change (e.g., increases or decreases). c) Assuming the collection plates of the ESP are 3 m tall and 1 m long in the direction of gas flow and the gas velocity is 1.2 m/s. What is the graded collection efficiency of this ESP for the particle diameters in question a)? d) There are several modifications we could make to the ESP design to improve its collection efficiency. List one of those modifications and one tradeoff for implementing that change. (Multiple answers can be correct as long as you justify them). Solution hints -Capo K Ech Eco (Equ. 10 in reading notes) and follow the steps as in 3μ a) Use equation w = similar solved example problem (week 5). b) Check Rec and then calculate collection efficiency accordingly.See Answer
Q15: (1 pt) A stack has an effective stack height of 150 m and is emitting PM10 at a rate of 175 g/son a cloudy night with Class D conditions. The wind speed at stack height is 7.6 m/s. Using Figure 20.9, estimate the maximum downwind ground-level concentration (µg/m³) and the distance at which it occurs (m).See Answer
Q16: 5. (3 pts) A student with an active SARS-CoV-2 (Covid-19 coronavirus) infection walks into a classroom without a mask. Prior to the student entering the classroom, the air is free from SARS-CoV-2 viral particles. The student is emitting 1,000,000 viral particles per hour. The classroom has a floor size of 8 m by 7 m, and a ceiling height of 3 m. Assume that there areno other sources of SARS-CoV-2 in the building, that the concentration of SARS-CoV-2 in the outdoor air is zero, and that there is no decay of the virus within the building. The air flow rate coming into the building (infiltration) and leaving the building (exfiltration) is 630m³/hour. a) Calculate the steady-state concentration of viral particles in the classroom if all conditions remain constant (viral particles/m³). b) Assume the viral particle concentration threshold for someone else in the room to catch Covid-19 is 200 viral particles per m³. How long would it take following the entry of the infected student for another student to catch the virus (in minutes)?See Answer
Q17: Assuming air contains 20% by volume 0; and 80% N3, for combustion of 100 standard cubic feet per minute (sefm) of methane (CH.4) in air. \mathrm{CH}_{4}+2 \mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}+2 \mathrm{H}_{0} \mathrm{O} The stoichiometric amount of O; needed for a complete combustion (in scfm) (b) The stoichiometric amount of air needed for a complete combustion (in sefm) (c) The stoichiometric mixture by volume (in % methane in the stoichiometric mixture) (d) The A/F ratio (in a mass/mass ratio)See Answer
Q18: 1. Which of the following media contains the largest amount of toluene, CeHsCH3 (show your calculations)? (a) 1 million gallons of water containing 5 ppm of toluene (b) 100 cubic meters of soils (bulk density = 1.8 g/cu. cm) with 5 ppm of toluene (c) An empty warehouse (30 m x 15 m x 10 m) with 5 ppmV toluene in air (P = 1 atm and T20 °C).See Answer
Q19: 2. From the elemental analysis, a waste mixture contains 15% by weight of ash, and the other portion of the mixture can be represented by a chemical formula of C600h1000O400N10s (a) Use Dulong's formula to estimate the heating value of this waste mixture in Btu/lb,assuming the ash has no heating value. (b) Convert the heating value of the heat mixture into million Btu/ton (c) Use the conversion factors between Btu and kJ and between Ib and kg to convert the heating value of the waste mixture into MJ/kgSee Answer

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