Problem 8 Given L0,mix=12 mg/L, DO mix=DOsat=11.33 mg/L, kd=0.3 d-1, and kr =0.4 d-1, find the following: (a) Initial oxygen deficit (Do) (b) Critical time on the oxygen sag curve (tc) (c) Critical deficit (Dc)
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- If (Qr/Q=120 percent of discharge), effluent BOD concentration=80ppm, volume of filter =825m3 , discharge =50L/sec , The influent BOD concentration equal: Choose one: a. 277.89 b. 277.2 c. 276 d. 2751. A wastewater is treated in an aerobic CSTR with no cell recycle. The following hold: Ks= 50mg/l; q^=5mg/mg VSSa-d; Kd= .06d-1; Y= 0.6; S°=220mg/l; fd= 1 a. Determine Ɵcmin, Ɵclim, SminFiltration is best suited for viscous liquids containing particulate matter. a.False b.True
- Note: Kindly provide a solution pls. The answer is already provided. Thank you! 1.19 A high concentrated solution having a volume of 120 liters is mixed by 9% alcohol and24% gasoline. It was found out that a 50-50 percent mixture is also appropriate in thesolution. How much gasoline (liters) should be added to the high concentrated solutionin order to have the 50-50 % mixture? Ans: 62.4A pulse-jet baghouse is desired for a finished cement plant. Calculate the number of bags required to filter 500 m3/min of air with a dust loading of 3,0 g/m3. Each bag is 3.0 m long with a 0.13 m diameter. If the average pressure drop is 1.0 kPa and the main fan is 80% efficient, calculate the fan power in kW< If the pulse air volumetric flow rate is 0.5% of the filter airflow rate and the pulse air pressure is 6.0 atm, calculate the power drawn by a 50% efficient compressor (in kW).You have been asked to provide a design for a rapid mix tank at a water treatment plant which has an average water temperature of 60°F. The tank is to have a detention time (ta = HRT) of 1.5 seconds, a mixing intensity (G) of 1,428/second, and treats a flow (Q) of 9.4 mgd. Calculate the Motor Power (Pmotor, in HP) required to achieve the desired G value if the transfer efficiency is 80%. Provide your answer to the hundredths place (0.01). Be very careful with units (they need to cancel appropriately) and don't forget to report your answer in HP, not ft-Ib/sec).
- Design a rapid mix tank for water at 50° F flowing at Q = 4.0 MGD for a typical process train ina drinking water treatment plant. Use a square tank with a depth 1.25 times the width, a designvelocity gradient G = 900 sec−1, and a hydraulic detention time τ = 30 seconds. Specificallydetermine:a. Rapid mix tank dimensions in feet and inches, to the nearest one inch.b. Input water horsepower (hp).c. Impeller rotational speed if a vane-disc impeller is used having a diameter half of the tankwidth and employing six flat blades and a baffled tank.Membrane filtration, operated in a dead-end mode, is used to treat secondary effluent. If the HPC in the effluent increased from 5 org/L to 200 org/L, after an extended period of operation, estimate the number of broken fibers for the following conditions. The influent flowrate and organism count are 4000 m3/d and 6.7×107 org/L, respectively. The membrane bundle contains 5000 individual fibers. If the influent and effluent turbidity values under normal operation are 4 and 0.25 NTU respectively, estimate the increase in the effluent turbidity assuming the increase could be measured.design an aeration tank of CASP based on the following data influent flowrate is 100000m3/d, influent CODcr is 200mg/l influent TKN is 40mg/l effluent is CODcr Is 20mg/l. required by Local regulation. Please answer very soon will give rating surely
- Medium fuel oil having an absolute viscosity of 6.55 x 10⁻⁵ ft²/s flows in a steel pipe 4100 ft long at a maximum rate of 0.201 cfs. Which of the following most nearly gives the minimum diameter of the pipe in ft required to keep the flow in a laminar condition?The pipe is 25mm with friction factor of 0.022. The second tank is vented. H1=1.4m H2=4.5m H3=1.0m X1=14.9m X2=2.7m Calculate the pressure(kPa) above the gasoline in the first tank that will result in a flowrate of 400 liters/min.The shake-deflate baghouse on the power plant has 12 compartments, each with 100 bags (cylindrical) that are 0.2 meter in diameter and 7 meter long. Total gas flowrate is 300,000 m3/h which carries 60 g/m3 of particulate matter concentration. The pressure drop of a freshly cleaned baghouse is found to be 250 Pa, while the bags are operated until the pressure drop of 750 Pa. The cleaning frequency is twice per hour. The particle collection efficiency is 95%, and filter