Perform a simple mass balance on the completely mixed reactor below to identify the recycled sludge concentration, X, as a-- I --function of the recycle ratio, R, and the mixed liquor concentration, x. Draw the system control boundary across which your mass balance is performed. a.b, Set-up your mass balance equation. Make sure to clearly identify inflows, outflows, rates of growth/consumption, etc., within your system; Identify ALLassumptions; c. d. e. Solve your mass balance equation for the recycle sludge concentration; If your recycle ratio, R, is 45% and your wasting rate is 5% ofthe average daily flow, what is the expected recycle sludge concentration, X, with respect to the mixed liquor concentration, X? Influent Effluent ClarifierWAS RAS Completely mixed reactor system

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Answered: Perform a simple mass balance on the…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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The van der Waals (vdW) equation is a cubic equation of state (CEOS) which may be used to calculate the volume or pressure conditions for a real gas: P= a = RT a v-b v² Here, v represents the molar volume of the gas, and P, R, and T' are the absolute pressure, ideal gas constant, and absolute temperature of the gas, respectively. The values a and b are component dependent an may be calculated using: 27 R²T² 64 P C and b= 1 RT 8 Pc So, when both the critical pressure (Pc) and critical temperature (Tc) are known, one can apply the vdW CEOS to give a more accurate calculate more accurate properties than the ideal gas law. One must be careful to use absolute values for the pressure & temperature (e.g., unit of K not °C) and a value for the gas constant that is consistent with the unit desired (such as R = 0.0083144598 L·bar/K·mol) Do the following: a) Calculate the molar volume (L/mol) of nitrogen gas (Pc = 33.96 bar, Tc = 126.19 K) at 5 bar and 30°C using both the ideal gas law & using…
Experiment Data Take the following data for the syringe injection pump 2/ Inner diameter of syringe barrel: D = 1.5 cm Inner diameter of the needle shaft of the syringe: d = 0.5 mm The thread pitch of lead screw: pt = 0.75 mm Lead screw rotation velocity (rpm): n Calculations Liquid injection rate (cm³/hr) Q = pt*n* 60 * * D²/4 Velocity of liquid in syringe barrel (cm/min) v = 4Q/ (60** D²) Velocity of liquid in syringe needle (cm/min) v₁ = 40/ (60* *d²) K Find the rotation velocity of lead screw n and the velocity of liquid in syringe needle if the required injection dose is 1. 10 cm³ in 3 hours (continuous injection) 2. 20 cm³ in 12 hours (discontinuous injection, 5 cm³ each 3 hour, injection time = 1 min). Discus the rece Solution Calculate the liquid injection rate Q = P₁ xnx60x² = 0.075xnx60xx1.5 = 7.94n- cm³ hr Calculate the velocity of liquid in barrel V₁ == 40 60xπx D² 4x7.94n 60xx1.5² = 0.07ncm hr Calculate the velocity of liquid in needle 40 60xπxd² 4x7.94n 60xπx 0.05² hr…
1. Consider this flow and level control system below. The tank is cylindrical and has a radius of 0.5 meter. The water flow at a rate of (T/400) cubic meter /minute. The level must be maintained at a height of 1 meter there is an error of + 0.02 meter. SP CV Controller PV F P L2 Block diagram of liquid level control system in a buffer tank.
2. FR1: Allow control of water flow rate FR2: Allow control of water temperature Develop the design matrix, A, for both design options and comment on the designs. Hot 0₁ I Cold I 0₁₂
Make a diagram.
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This problem is (16.23) from a book "Thermodynamics and Statistical Mechanics An Integrated Approach by M. Scott Shell"
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Please, solve task 1
PROBLEMS 1. Accumulation represents the change in mass in the reactor per change in time. For a constant-volume system, it can be simply formulated as ,dc Accumulation = V“ dt (28.1) where V = volume and e = concentration. Thus, a mathematical formulation for accu- mulation is volume times the derivative of e with respect to t. Solution. Equations (28.1) and (12.1) can be used to represent the mass balance for a single reactor such as the one shown in Fig. 28.1: dc V = Qcm - Qc (28.2) dt Accumulation = inputs – outputs Equation (28.2) can be used to determine transient or time-variable solutions for the reactor. For example, if c = co at t = 0, calculus can be employed to analytically solve G = 50 mg/m², Q = 5 m'/min, V = 100 m²., and co = 10 mg/m², Use Euler's method to find the solution of e from t = 0 to 40 s with a step size (h) of 10 s.
State true or false 1. The thermal boundary layer will be thicker than the velocity boundary layer if Pr>1. 2. For laminar flow in a tube subjected to a uniform heat flux, the fluid temperature decreases linearly along the tube. 3. Gravity force rather than buoyancy force plays a more important role in free convection. 4. Reynolds number is the ratio of the buoyancy force and viscous force. 5. The hydraulic diameter of annulus is D2-D .

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