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5 points Save Answer Question 4 A reactor is to be designed for BOD removal from...
Problem 3 (15 pts) A long, narrow lagoon is to be designed to treat 220 mg/L...
Problem 3 (15 pts) A long, narrow lagoon is to be designed to treat 220 mg/L of industrial waste flowing at a rate of 500 L/min. The decay rate constant was found to be 5.0(mg/L)/h (same as 5.0 mg/L·h). Assume 90% removal is achieved in the lagoon. a) What order is the reaction rate? b) What is the residence time in the lagoon? c) What is the volume in ms of this plug flow reactor? Draw a diagram, write governing...
Problem 4 (10 Points). You collect a sample of wastewater and run a BOD test. To...
Problem 4 (10 Points). You collect a sample of wastewater and run a BOD test. To run this test, you mix 25 mL of the wastewater sample with clean (unseeded) dilution water to bring the total volume in the bottle to 300 ml, After measuring the initial dissolved oxygen concentration, you cap the BOD bottle and monitor the dissolved oxygen concentration of the diluted sample in the BOD bottle as a function of time (see Figure below). Previous tests have...
nment #2 (Part A & B) Assigned: 01/23/2019 Due Date: 02/01/2019 Total Points 110 Part B...
nment #2 (Part A & B) Assigned: 01/23/2019 Due Date: 02/01/2019 Total Points 110 Part B A completely mixed flow reactor is to be designed to treat an influent stream with a COD concentration of 250 mg/L and a flow rate of 150 gallons per minute (GPM). Assume COD removal reaction has a degradation rate constant of 0.38 h1. Determine the hydraulic detention time (in hours) for the reactor and the volume of the reactor in ftIf the effluent COD...
QUESTION 4 points Save Answer You are the sustainability coordinator for a company and are evaluating...
QUESTION 4 points Save Answer You are the sustainability coordinator for a company and are evaluating green energy options. You get a company to lend you a biomass-to- energy (B2E) system for a 30-day trial. The B2E system is 34% efficient and you need 1.5 MW of power to meet the company's energy needs. You also plan to use the waste heat for hot water, which is needed at a flow rate of 0.02 m3/s. A neighboring company produces waste...
Question 27 4 points Save Answer The equilibrium constant for the following gas phase reaction is...
Question 27 4 points Save Answer The equilibrium constant for the following gas phase reaction is 4.0 at a certain temperature. A reaction is carried out at this temperature starting with 0.86 mol/l of CO and 20.42 mol/L of H20. What will be the equilibrium concentration of H2. (ICE) CO(g) + H2O(g) -- CO2(g) + H2(g)
Please answer question 7.11 that is modified from the book, thank you! uent welr IS located...
Please answer question 7.11 that is modified from the
book, thank you!
uent welr IS located on Lle periphery of each tank. Calculate the surface overflow rate, etention time, and weir loading rates. If one tank is taken out of detention time? Is the design adequate for the average flow with the three tanks in service? m3/d. The engineer wishes to use rectangular clarifiers for primary 18 Fundamentals of wastewater treatment and engineering treatment. Design the rectangular tanks for a...
QUESTION 9 1 points Save Answer Match up the gas name with the definition. Study them...
QUESTION 9 1 points Save Answer Match up the gas name with the definition. Study them first and then do it from memory! For a fixed amount of gas at constant pressure, the "volume of the gas is proportional to its Kelvin temperature. When the pressure and temperature are held constant, B. the volume of a gas is proportional to the number of moles present. For a fixed amount of gas at constant temperature, the pressure and volume of the...
QUESTION 44 5 points Save Answer A 0.5-L unbuffered solution needs the pH adjusted from 6.8...
QUESTION 44 5 points Save Answer A 0.5-L unbuffered solution needs the pH adjusted from 6.8 to 2.5. How many microliters of a 6 molar HCl solution need to be added to adjust the pH? Report your answer to four decimal places. For this question: • Assume the volume of HCl being added is negligible and the total volume of the solution does not change. • The volume of the solution is *not* 1 L like it was in the...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as shown below: HXiaq) + NaOH(ac) + NaCN aql + H200). Suppose you carried out this reaction in a coffee cup calorimeter using 50.0 mL of 0.500 M HX and 0.500 mL of 0.500 M NAOH If the temperature of the calorimeter increases by 1.4°C, what is the enthalpy of this neutralization reaction (in kJ/mol? Assume the density of the solution is 1.00g/mL and that...
QUESTION 4 4 points (Extra Credit) Save Answer Bonus question: Kemmi Major is working on a...
QUESTION 4 4 points (Extra Credit) Save Answer Bonus question: Kemmi Major is working on a professor's research project. She uses a back-titration technique to determine if her reaction has formed the maximum amount of product. Back-titration works by reacting the species of interest (S) with an excess of the first chemical (A), resulting in complete reaction of the species of interest and some left-over first chemical. Then a second chemical (B) is titrated into the mixture to react with...
Problem 3 (15 pts) A long, narrow lagoon is to be designed to treat 220 mg/L of industrial waste flowing at a rate of 500 L/min. The decay rate constant was found to be 5.0(mg/L)/h (same as 5.0 mg/L·h). Assume 90% removal is achieved in the lagoon. a) What order is the reaction rate? b) What is the residence time in the lagoon? c) What is the volume in ms of this plug flow reactor? Draw a diagram, write governing...
Problem 4 (10 Points). You collect a sample of wastewater and run a BOD test. To run this test, you mix 25 mL of the wastewater sample with clean (unseeded) dilution water to bring the total volume in the bottle to 300 ml, After measuring the initial dissolved oxygen concentration, you cap the BOD bottle and monitor the dissolved oxygen concentration of the diluted sample in the BOD bottle as a function of time (see Figure below). Previous tests have...
nment #2 (Part A & B) Assigned: 01/23/2019 Due Date: 02/01/2019 Total Points 110 Part B A completely mixed flow reactor is to be designed to treat an influent stream with a COD concentration of 250 mg/L and a flow rate of 150 gallons per minute (GPM). Assume COD removal reaction has a degradation rate constant of 0.38 h1. Determine the hydraulic detention time (in hours) for the reactor and the volume of the reactor in ftIf the effluent COD...
QUESTION 4 points Save Answer You are the sustainability coordinator for a company and are evaluating green energy options. You get a company to lend you a biomass-to- energy (B2E) system for a 30-day trial. The B2E system is 34% efficient and you need 1.5 MW of power to meet the company's energy needs. You also plan to use the waste heat for hot water, which is needed at a flow rate of 0.02 m3/s. A neighboring company produces waste...
Question 27 4 points Save Answer The equilibrium constant for the following gas phase reaction is 4.0 at a certain temperature. A reaction is carried out at this temperature starting with 0.86 mol/l of CO and 20.42 mol/L of H20. What will be the equilibrium concentration of H2. (ICE) CO(g) + H2O(g) -- CO2(g) + H2(g)
Please answer question 7.11 that is modified from the
book, thank you!
uent welr IS located on Lle periphery of each tank. Calculate the surface overflow rate, etention time, and weir loading rates. If one tank is taken out of detention time? Is the design adequate for the average flow with the three tanks in service? m3/d. The engineer wishes to use rectangular clarifiers for primary 18 Fundamentals of wastewater treatment and engineering treatment. Design the rectangular tanks for a...
QUESTION 9 1 points Save Answer Match up the gas name with the definition. Study them first and then do it from memory! For a fixed amount of gas at constant pressure, the "volume of the gas is proportional to its Kelvin temperature. When the pressure and temperature are held constant, B. the volume of a gas is proportional to the number of moles present. For a fixed amount of gas at constant temperature, the pressure and volume of the...
QUESTION 44 5 points Save Answer A 0.5-L unbuffered solution needs the pH adjusted from 6.8 to 2.5. How many microliters of a 6 molar HCl solution need to be added to adjust the pH? Report your answer to four decimal places. For this question: • Assume the volume of HCl being added is negligible and the total volume of the solution does not change. • The volume of the solution is *not* 1 L like it was in the...
QUESTION 1 0.5 points Save Answer The weak acid, HX, is neutralized by sodium hydroxide as shown below: HXiaq) + NaOH(ac) + NaCN aql + H200). Suppose you carried out this reaction in a coffee cup calorimeter using 50.0 mL of 0.500 M HX and 0.500 mL of 0.500 M NAOH If the temperature of the calorimeter increases by 1.4°C, what is the enthalpy of this neutralization reaction (in kJ/mol? Assume the density of the solution is 1.00g/mL and that...
QUESTION 4 4 points (Extra Credit) Save Answer Bonus question: Kemmi Major is working on a professor's research project. She uses a back-titration technique to determine if her reaction has formed the maximum amount of product. Back-titration works by reacting the species of interest (S) with an excess of the first chemical (A), resulting in complete reaction of the species of interest and some left-over first chemical. Then a second chemical (B) is titrated into the mixture to react with...
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