Q:A city of 200,000 people disposes of 1.05 m. s' of treated sewage that still has a BODu of 28.0 mg. L' and 1.8 mg. L' of DO into a river. Upstream from the outfall, the river has a flow rate of 7.08 m. s' and velocity of 0.37 m.s'. At this point, the BODU and DO in the river are 3.6 and 7.6 mg. L', respectively. The saturation value of DO ( at the temperature of the river) is 8.5 mg. L'. The deoxygenation coefficient, ka is 0.61 day', and the reaction coefficient, k is 0.76 day". Assume complete mixing and that the velocity in the river is the same upstream and downstream of the outfall. 1- What is the oxygen deficit and the BODU just downstream from the outfall (just after mixing, before any reaction can occur)? 2- What is the D0 16 km downstream? 3- Calculate the critical time and distance. 4- What is the minimum DO?

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
icon
Related questions
icon
Concept explainers
Question
09-03-2021 - الامتحان اليومي الثاني
هندسة البيئة
Q:A city of 200,000 people disposes of 1.05 m. s' of treated sewage that
still has a BODU of 28.0 mg . L' and 1.8 mg . L' of D0 into a river.
Upstream from the outfall, the river has a flow rate of 7.08 m3. s' and
velocity of 0.37 m. s'. At this point, the BODU and DO in the river are 3.6
and 7.6 mg . L', respectively. The saturation value of DO ( at the
temperature of the river ) is 8.5 mg. L. The deoxygenation coefficient, kd
is 0.61 day' , and the reaction coefficient, kr is 0.76 day'. Assume
complete mixing and that the velocity in the river is the same upstream and
downstream of the outfall.
1- What is the oxygen deficit and the BODU just downstream from the
outfall (just after mixing, before any reaction can occur)?
2- What is the DO 16 km downstream?
3- Calculate the critical time and distance.
4- What is the minimum DO?
Transcribed Image Text:09-03-2021 - الامتحان اليومي الثاني هندسة البيئة Q:A city of 200,000 people disposes of 1.05 m. s' of treated sewage that still has a BODU of 28.0 mg . L' and 1.8 mg . L' of D0 into a river. Upstream from the outfall, the river has a flow rate of 7.08 m3. s' and velocity of 0.37 m. s'. At this point, the BODU and DO in the river are 3.6 and 7.6 mg . L', respectively. The saturation value of DO ( at the temperature of the river ) is 8.5 mg. L. The deoxygenation coefficient, kd is 0.61 day' , and the reaction coefficient, kr is 0.76 day'. Assume complete mixing and that the velocity in the river is the same upstream and downstream of the outfall. 1- What is the oxygen deficit and the BODU just downstream from the outfall (just after mixing, before any reaction can occur)? 2- What is the DO 16 km downstream? 3- Calculate the critical time and distance. 4- What is the minimum DO?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Knowledge Booster
Hydronics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Elements Of Electromagnetics
Mechanical Engineering
ISBN:
9780190698614
Author:
Sadiku, Matthew N. O.
Publisher:
Oxford University Press
Mechanics of Materials (10th Edition)
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:
9780134319650
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Thermodynamics: An Engineering Approach
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:
9781259822674
Author:
Yunus A. Cengel Dr., Michael A. Boles
Publisher:
McGraw-Hill Education
Control Systems Engineering
Control Systems Engineering
Mechanical Engineering
ISBN:
9781118170519
Author:
Norman S. Nise
Publisher:
WILEY
Mechanics of Materials (MindTap Course List)
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:
9781337093347
Author:
Barry J. Goodno, James M. Gere
Publisher:
Cengage Learning
Engineering Mechanics: Statics
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:
9781118807330
Author:
James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:
WILEY