ZuoTi.Pro
Question

4.(8 pts) ACSTR is used to treat an industrial waste. If the reaction that destroys the pollutant follows first-order kinetics with k 0.2 d 1 what is the outlet concentration after treatment? Assume the reactor volume is 500 m3, the volumetric flowrate of the single inlet and outlet is 50 m3/day, and the pollutant concentration in the inlet is at a concentration of 100 mg/L.

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

mixe km da vahia 2 GA o X 0.2 6-0 A- 33.3.3 mg/L 33. 33 ma/L

0 0
Add a comment
Know the answer?
Add Answer to:
A CSTR is used to treat an industrial waste. If the reaction that destroys the pollutant...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • 11. A lagoon with constant volume of 450,000 m' is being used to treat two separate...

    11. A lagoon with constant volume of 450,000 m' is being used to treat two separate waste streams. One has a flow rate of 5.0 m/s and a waste concentration of 500 mg/L. The other has a flow rate of 1 m/s and a waste concentration of 1500mg/L. The pollutant has a reaction rate coefficient (k) of 0.3/day. Assuming the pollutant is well mixed in the lagoon, find the steady-state concentration of pollutant in the lagoon. (10 Points)

  • 1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant...

    1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant in the raw waste is 850 mg/L with first-order reaction rate constant of 2.5/day. The industry splits the flow into three parallel continuous stirred tank reactors at 0.25 m/day to reactor one, 0.3 m/day to reactor two and the remaining 0.17 m®/day to reactor three. If each reactor must achieve removal efficiency of 90%, what is the required detention time and the volume for...

  • Problem 2. An activated sludge unit is being designed to treat 375,000 gpd with an influent...

    Problem 2. An activated sludge unit is being designed to treat 375,000 gpd with an influent BOD of 250 mg/1. Parameters for the wastewater are: Y 0.6, m -2.0 days-1, kd0.15 days-1 and K, 40 mg/l. The recycle flow is 3750 gpd with a biomass concentration of 50 X, where X is the reactor biomass concentration. The waste sludge flow is 500 gpd. Calculate the mean cell residence time, e, and CSTR volume required for a 95% removal of influent...

  • You are given the rate equation −rA" = -kA" CA for the liquid-phase reaction A--->B. Inlet...

    You are given the rate equation −rA" = -kA" CA for the liquid-phase reaction A--->B. Inlet flow rates are 100 mol/s of pure A, which has a density of 1000 kg/m3 and a molar mass 1000 g/mol. The rate constant is 1x10-6m/s. You are told the reactor has a catalyst of surface area Sg of 5 m2/g, and the catalyst density in the reactor  is 25 kg/m3. a.  To achieve 50% conversion in an isothermal steady-state CSTR, what is the volume required?...

  • An elementary reaction is operated in liquid phase in a perfect mixed flow (CSTR) reactor A...

    An elementary reaction is operated in liquid phase in a perfect mixed flow (CSTR) reactor A 3B The feeding is composed of pure reactant A at an inlet molar flowrate of 1mol.h. The reaction advancement ? is 0.8 mol.h-1. a) Compute the partial molar flowrates of A and B at the reactor outlet b) ? (h) the space time, is defined as the ratio between the volume of the liquid mixture ver the volumetric flowrate of the feeding stream q(m.h),...

  • please ahow all work What will be the steady-state effluent BOD concentration for a CSTR (complete...

    please ahow all work What will be the steady-state effluent BOD concentration for a CSTR (complete mix reactor with flows in and out, and no recycle) treating a wastewater with an initial BOD of 200 mg/L. The influent flow rate is 100 liters/day, and the reactor volume is 120 liters. Assume first order kinetics with a biodegradation rate constant of 0.5 day! Use the space provided below to show your calculations. mg/L Effluent BOD concentration

  • A completely mixed activated sludge plant is designed to treat 10,000 m3/d of an industrial wastewater....

    A completely mixed activated sludge plant is designed to treat 10,000 m3/d of an industrial wastewater. The wastewater has a BOD5 of 1200 mg/L. Pilot plant data indicates that a reactor volume of 6090 m3 with an MLSS concentration of 5000 mg/L should produce 83% BOD5 removal. The value for Y is determined to be 0.7 kg/kg and the value of kd is found to be 0.03 d–1. Under ow solids concentra- tion is 12,000 mg/L. The ow diagram is...

  • A well-mixed lagoon is used to pre-treat an agricultural waste stream before it is sent to...

    A well-mixed lagoon is used to pre-treat an agricultural waste stream before it is sent to the local municipal wastewater treatment plant. The waste stream has a flow rate of 400 m3/d and contains 300 mg/L of biodegradable waste. The waste decomposes via a first- order biodegradation process with a rate constant of 0.35 d-1. How large must the lagoon be in order to drive the concentration of waste down to 20 mg/L (as required by the municipal wastewater treatment...

  • A lagoon with volume 1,000 m3 has been receiving a steady flow of a nonconservative pollutant...

    A lagoon with volume 1,000 m3 has been receiving a steady flow of a nonconservative pollutant with reaction rate of .20/day at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 100 mg/L. Assume completely mixed conditions. If the input waste concentration suddenly decreased to 10mg/L, what would the concentration in the effluent be 10 days later?

  • (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. Th...

    (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...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT