Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
P1. An oxidation ditch activated sludge system receives 7500 m³/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210 mg/L. The oxidation ditch (bioreactor) is 3 m deep, 7 m wide and 200 m long. It is operated at 1800 mg/L biomass (MLSS), with biological constants of Y = 0.5 and ka = 0.06 d¹. Determine the sludge age for 90% BOD removal. Q Return sludge Influent Effluent

P1. An oxidation ditch activated sludge system receives 7500 m³/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210 mg/L. The oxidation ditch (bioreactor) is 3 m deep, 7 m wide and 200 m long. It is operated at 1800 mg/L biomass (MLSS), with biological constants of Y = 0.5 and ka = 0.06 d¹. Determine the sludge age for 90% BOD removal. Q Return sludge Influent Effluent

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question

Environmental Engineering.   P1. An oxidation ditch activated sludge system receives 7500 m³/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210 mg/L. The oxidation ditch (bioreactor) is 3 m deep, 7 m wide and 200 m long. It is operated at 1800 mg/L biomass (MLSS), with biological constants of Y = 0.5 and ka = 0.06 d¹. Determine the sludge age for 90% BOD removal.

P1. An oxidation ditch activated sludge system receives 7500 m³/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210 mg/L. The oxidation ditch (bioreactor) is 3 m deep, 7 m wide and 200 m long. It is operated at 1800 mg/L biomass (MLSS), with biological constants of Y = 0.5 and ka = 0.06 d¹. Determine the sludge age for 90% BOD removal. Influent ♡ Return sludge Effluent P2. A single aerated lagoon 5800 m³ volume receives a wastewater flow of 2500 m³/d with 300 mg/L BODs. If the steady-state MLSS in the lagoon (biomass cells) is 400 mg/L, determine: (a) the detention time, (b) volumetric organic loading rate (BODs/day/m³), and (c) the F/M ratio. P3. Consider the wastewater data in P2 (above). If the BOD kinetics is first order with k = 1.3 d'¹, determine the effluent BODs concentration (mg/L) for: a) Single lagoon, and b) Two lagoons in series. P4. A municipal wastewater with a flow rate of 3785 m³/d and BODs of 280 mg/L is to be treated by a two-stage trickling filter system in series. The first filter remove 60% of the BOD, and the final effluent should not be more than 30 mg/L BODs. Determine the overall removal BOD efficiency at 20°C. What will happen to this efficiency if temperature drops to 10°C?
Transcribed Image Text:P1. An oxidation ditch activated sludge system receives 7500 m³/d of municipal wastewater from the primary clarifier stage with a soluble BOD of 210 mg/L. The oxidation ditch (bioreactor) is 3 m deep, 7 m wide and 200 m long. It is operated at 1800 mg/L biomass (MLSS), with biological constants of Y = 0.5 and ka = 0.06 d¹. Determine the sludge age for 90% BOD removal. Influent ♡ Return sludge Effluent P2. A single aerated lagoon 5800 m³ volume receives a wastewater flow of 2500 m³/d with 300 mg/L BODs. If the steady-state MLSS in the lagoon (biomass cells) is 400 mg/L, determine: (a) the detention time, (b) volumetric organic loading rate (BODs/day/m³), and (c) the F/M ratio. P3. Consider the wastewater data in P2 (above). If the BOD kinetics is first order with k = 1.3 d'¹, determine the effluent BODs concentration (mg/L) for: a) Single lagoon, and b) Two lagoons in series. P4. A municipal wastewater with a flow rate of 3785 m³/d and BODs of 280 mg/L is to be treated by a two-stage trickling filter system in series. The first filter remove 60% of the BOD, and the final effluent should not be more than 30 mg/L BODs. Determine the overall removal BOD efficiency at 20°C. What will happen to this efficiency if temperature drops to 10°C?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Similar questions
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS