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A mass balance for a chemical in a completely mixed reactor is given by y de...
(6 pts) Perform a simple mass balance on the completely mixed reactor below to identify the recycled sludge concentration, X, as a 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 ALL assumptions; c. d. e. Solve your mass balance equation for the...
(6) Consider the stirred tank reactor under isothermal conditions. The reaction occurring is 7 A → P and it proceeds at a rate TA=-k.CA/(1+k2.C); mole/m.h ki = 1.0 h k2 -1.0 m/mole Data: V = 2 m'; F = 1 m/h; CA (0) -0.5 mole/m Assuming constant density and volume, derive the transfer function relating the concentration in the reactor to the feed stream concentration. Analytically obtain the response of reactor concentration to a unit step change in CAO (10...
Question 2 For an isothermal, constant volume batch reactor in which the following reaction is occurring A - B A laboratory technician measures the rate of reaction of A in a reactor for different concentrations, and obtains the following data: CA 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 1.0 [mol.L' -TA 0.1 0.4 0.9 1.6 2.5 3.6 4.9 6.4 10 (mol.L-min'] The laboratory technician tells you that if you plot - r against (CA) that you get a straight...
A liquid chemical is pumped from a storage tank open to the atmosphere, into a reactor with pressure of 2.0 atm gauge above the liquid level. The liquid density is 1200 kg/m3 and viscosity is 1.45 cP. The required volumetric flow rate is 1.25 x 103 m/s. The pipeline is 100 m long in total, made of commercial steel pipe, 2 in. size and Schedule 40. The gate valve is wide open. 10 m Reactor Calculate: (a) The discharge velocity...
(30 points) A completely mixed activated sludge system comprised of an aerated reactor and a secondary clarifier with sludge return is going to treat 15,000 m/d of industrial wastewater. The primary effluent going to the reactor has a BODs of 1,100 mg/L that must be reduced to 150 mg/L prior to discharge to a municipal sewer. The pilot study was conducted and generated the following results: 3. Mean cell residence time- 5 day, MLSS concentration in the reactor 7.200 mg/L...
6) Mass balance and reactor design You have been hired as a high priced consultant to assess the performance of a reactor designed to treat a toxic chemical C to a "safe" level. You are given the following information: Q = 300 m²/d V = 2000 m Influent concentration (Ci) = 500 mg/L Required removal rate = 95% Degradation occurs according to the reaction rate equation r= -dC/dt = kС, where k= 3/d a. What order is this reaction? (2...
A well-mixed fermenter contains cells initially at concentration x0. A sterile feed enters the fermenter with volumetric flow rate F; fermentation broth leaves at the same rate. The concentration of substrate in the feed is si. The equation for the rate of cell growth is: rx = k1 x and the equation for the rate of substrate consumption is: rs = k2 x where k1 and k2 are rate constants with dimensions T-1 , rx and rs have dimensions M...
4. Rural facultative pond with a winter flow of 6000 m3/d where the influent has a BOD concentration of 90 g/m^3. The reaction rate is given by Kc(T)=0.3x1.135^(T-20). Assuming completely mixed, use Marias & Shaw equation to determine the pond volume to produce an effluent of 15 mg/l/
Describe your solutions in detail, because partial credit will be given based on your work. If additional information is necessary in solving the problems, DO use your engineering sense and provide reasonable assumptions and explanations. You may use your calculator if necessary. Use a language of your choice. Note: The following information may be used. Gas constant, R-8.314 J(mol K)-8.314 kPa L/(mol K)-0.082 L atm/(mol K)-6.132 lbr ft/(gmol K)=1,987 cal/(mol K). Atomic mass of N-14; Atomic mass of O= 1...
1. How pH of so is evaluated? Does soil pH upset plant growth experiment? Why KCl is used in pH meter? How will you formulate 0.1 M solution of KOH? What is pH of electrode storage solution? 2. What is the use of point of zero charge of any adsorbent? What is its use in electrochemistry? What are the dissimilarities between zeta potential and point of zero charge? 3. What are the varieties of fats in food? In what way...