CSTR CSTR Q Q PFR PFR
Q: Test the consistency of the 22 years of data of the annual precipitation measured at station A. Rain...
A: step 1 ) FIRST ARRANGE ALL GIVEN DATA IN REVERSE CHRONOLOGICAL ORDER ( THE LATEST RECORD AS THE FIR...
Q: Determine the total length of bottom bars from the figure shown below. Concrete cover is 40 mm. Use ...
A: Please find the answer in the below attachments
Q: Test the consistency of the 22 years of data of the annual precipitation measured a station A. Rainf...
A: step 1 ) first we plot double mass curve in REVERSE CHRONOLOGICAL ORDER ( the latest record as the f...
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Q: measured from the zero moment The centroid of a 3rd degree curve of a moment diagram is located at 0...
A: The third degree curve of the moment diagram is generally obtained when there is uniformly varying l...
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Q: Draw the CPM diagram using Activity on Nodes (AON) and Activity on Arrows (AOA) and solve for the cr...
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Q: A beam of uniform cross-section and span L is built-in at one end and simply supportea at the other....
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Q: For the beam loaded as shown in the figure 1, determine the reaction at A in kN using Double Integra...
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Q: 2. The structure is used to support a distributed load of w = 5 kN/m. The bolts at A, B, and C each ...
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Q: what is the name of the concrete stress approximation used for determining flexural strength using t...
A: The correct answer is beam test .
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Q: F2 = 40 N 30° F1 = 30 N
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Q: A factory with a wastewater flow of 0.011 m/s and a BOD; of 590 mg/L discharges into a small stream....
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Q: Using ANY GEOMETRIC METHOD Consider 250 mm x 400 (b x h) mm section and E = 100,000 MPa. Enter the a...
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Q: Discuss Schmertmann’s method
A: Schmertmann’s approach is used to determine the soil's flexible settling beneath the foundation. Thi...
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Q: zweeks 99 3. From the followin quired for the colu concrete. Dia = 42 12 pcs. Octagonạl Colum
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Q: The perpendicular distance from the tangent at PC to a point Q on a simple curve is 49m. If the chor...
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Q: 3. Design a rectangular R.C.C. beam using the following data: Beam span is 30' ft; f_, = 60 ksi , f'...
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Q: The difference between the early start date and the late start date for activities on the critical p...
A: Brief concept- Early start date- It is the date on which any activity can be started as soon as poss...
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A: It is a routine activity performed by a person to earn his livelihood,which generally does not inclu...
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Q: 1. What are the different types of Building subsystems? 2 Why is the National Ruilding and Plumbing ...
A: The different types of Building subsystems are: Buildings have a number of subsystems known as utili...
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Q: determine the deflection at E in mm using Double Integration Method Consider 150 mm x 150 mm section...
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Q: Determine the ductility of a tested material in terms of percent elongation and percent reduction o...
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Q: a) Determine thę centroid location (measured upward from the bottom), in mm rounded to the nearest t...
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Q: Determine the design capacity using ASD and NSCP specifications for the connection shown. Use A36 st...
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Q: Draw SFD and BMD for the single side overhanging beam subjected to loading as shown below. Mark sali...
A: Draw SFD and BMD for the single side overhanging beam subjected to loading as shown below.
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Q: ) From the given parcel of lot on the field notes shown: Line Beoring Length (m) Departure(m) Latitu...
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Q: A pipe 800 m long connects two reservoirs whose level difference is 60 m. Find the discharge in pipe...
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Q: This is a semi-graphical method in which the integration of the bending moment is carried out indire...
A: Answer: Option (1) Area moment method. is correct
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A: Answer 1) we have The maximum moment in beam = 96 k-ft =1152k-in Yield strength (fy) = 36 ksi Assume...
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Q: View Policies Current Attempt in Progress Two solid bars support a load Pas shown. Bar (1) has a cro...
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Q: Two blocks are connected by a solid strut attached to each block with frictionless pins. If the coef...
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Q: 4. A drying test was carried out in a laboratory dryer to determine the drying rate curve and the cr...
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Q: Arable land is used to grow crops and feed livestock. True False
A: Arable land is used to grow crops and feed livestock It is true statement
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- 1. A CM reactor receives influent containing 10 mg/L of tracer dye for 2 hours. The tracer addition is terminated but the flowrate of water is maintained. The volume of the reactor is 10 L and the flowrate is 2 L/hr. What is the concentration of tracer in the reactor 1 hr after the dye addition is terminated? The reactor had an initial concentration of tracer of 1 mg/L when the tracer addition commenced.4 An activated sludge system is to be used for secondary treatment of 10,000 m³/d of municipal wastewater. After primary clarification, the BOD is 150 mg/L, and it is desired to have not more than 5 mg/L of soluble BOD in the effluent. A completely mixed reactor is to be used, and pilot-plant analysis has established the following kinetic values: Y = 0.5 kg/kg, k, = 0.05 d-¹. Assuming an MLSS concentration of 3000 mg/L and an underflow concentration of 10,000 mg/L from the secondary clarifier (MLVSS=0.8MLSS) determine (1) the volume of the reactor, (2) the mass and volume of solids that must be wasted each day, and (3) the recycle ratio.Environmental Engineering question: A drinking water treatment facility is planning to reduce operation cost and residence time for one of the reactors in the treatment plant. What type of rectors will you recommend and why? a. Batch reactor b. Plug flow reactor c. Continuously stirred tank reactor
- An activated-sludge system is to be used for secondary treatment of 15,000 m3/d of municipal wastewater. After primary clarification, the BOD is 130 mg/L, and it is desired to have not more than 5 mg/L of soluble BOD in the effluent. A completely mixed reactor is to be used, and pilot-plant analysis has established the following kinetic values: Y = 0.6 kg/kg, kd = 0.07 d-1. Assuming an MLSS concentration of 2,750 mg/L and an underflow concentration of 11,000 mg/L from the secondary clarifier, determine the followings. [Use θc (MCRT or SRT) = 10 day.] 5.1. The volume of the reactor. 5.2. The mass and volume of solids that must be wasted each day. 5.3. The recycle ratio. Hint: θc = VX/QwXu : MCRT (mean cell-residence time) [or SRT (solids retention time)]; average time microbes spend in reactor = ratio of total biomass in reactor to biomass wasted per given time; currently most commonly used design parameter F/Mv: inversely proportional to SRT; ≈U (cell's specific substrate…A Pump & Treat water treatment system at a contaminated site is designed to treat 5 m3/d of ground water in a reactor designed as a well mixed system. The effluent must meet quality standards of 25 mg/L of Iron. The treatment reactor’s 20 m3 volume is believed to be insufficient to achieve the standard. The ground water has an iron concentration of 100 mg/L and the treatment reactor has a kinetic constant of 0.5 d-1. – Confirm that the treatment system will NOT meet the effluent quality standards. – If not modify the design by adding a PFR system (using same treatment process and kinetics), what volume should the PFR addition be?A treatment plant has been designed to achieve 99 percent inactivation of Giardia Lamblia using chlorine dioxide. The engineer used data on the disinfection of Giardia Lamblia at 20°C for the design, but the plant operates in a northern climate, and current estimates are that the low water temperature in some winters will be 0.5°C. Estimate the expansion required in the contact chamber in order to achieve the same inactivation at that temperature. You may assume complete mixing in the contact chamber and that the inactivation of Giardia Lamblia follows the Chick-Watson relationship. Ct values for achieving 90% inactivation of Giardia Lamblia (mg.min/L) Temperature (°C) 0.5 °C 5 °C 10 °C 15 °C Chlorine 0.97 0.63 0.48 0.32 dioxide * Note that the chick Watson's disinfection rate constant is a function of temperature. 20 °C 0.24 25 °C 0.16
- Environmental Engineering: Water Treatment Please consider each of the following points: a. Determine the required residence time for each reactor of 3 equal volume CSTRs in series given a zero-order reaction with a reaction rate constant, k = -5 mg/L hr. The influent concentration is 125 mg/L and 95% conversion is required across the three-reactor system. What is the total reactor system residence time? b. Determine the required residence time for a single CSTR given the same conditions. c. Determine the required residence time for a PFR given the same conditions. d. Why are all three residence time the same?The volume of a CFSTR is 45 m' and average constant flow in the reactor is 300 m /d. The reactor flow regime was established by feeding continuously 6 g/L stock tracer solution in the influent line at a rate of 125 L per day. Determine the theoretical tracer concentration in the effluent at 3 and 10 h after the tracer injection. Plot the tracer profile as a function of (a) concentration versus t, and (b) C/Co versus t/0.Environmental Engineering: A reaction takes place in aqueous solution and is first order. The required degree of conversion is 99% and this takes place in 10 minutes in a batch experiment. a. What would the necessary detention time be in a CSTR? b. What would be the necessary detention time to achieve 99% conversion in a CSTR system using two equal tanks in series?
- Develop a mathematical expression of three phase fluidized bed reactor for first order catalytic reaction A - B, accounting for reactant A at any level Z in the bedThree CSTRs are to be used in series. The second reactor has a volume twice that of the first and third reactors. The influent flow has a concentration of 150 mg/L of TOC, and the flowrate is 100 gal/min (380 l/min). The reaction is first order, the rate constant is 0.4/hr.a. Determine the mean residence time and volume of each reactor if theremoval or conversion of TOC is 90% (for the entire system as a whole).b. What is the concentration of TOC in each reactor? c. What is the overall efficiency of this treatment process?A contaminant is degraded biologically according to a 1st order reaction. A batch reactor experiment indicated that 85% of the contaminant could be degraded in 25.0 minutes a) What percent removal would be achieved in one CSTR with a detention time of 30 minutes? b) What percent removal would be achieved in two CSTRs in series if they had the same volume and a combined detention time of 30 minutes? c) What is the half-life of the contaminant (in minutes)? d) What would be the percent removal in a single PFR with a detention time of 30 minutes? e) The PFR described above has a horizontal velocity = 0.3 ft/s, a width = 10 ft, and a depth = 10 ft. What is the length of the reactor (in feet) and what flow is passing through the reactor (in mgd)?