4.2.AWWTP is to treat 5 MGD of wastewater using activated sludge. Five sets of aeration tank followed by five secondary clarifiers to be used of which four of them to be working at any time. The MLSS is 1400 mg/L. What is the solids loading rate if the cross section area is 300 ft² and the flow rate of activated sludge need to be returned from the recycling line is 30%? b) 76 Ib/d.ft² c) 51 Ib/d.ft² d) 63Ib/d.ft² a) 46 Ib/d.ft² 4.3.Two machines working in a room measures (40 m x 10 m x 5 m). Every machine emits an air pollutant (MW=106 g/mole) at a rate of 230 mg/hr. Assume the air pollutant is conservative. How many air changes per hour are needed to maintain a concentration of 0.1 ppm in a STP of 1 atm. and c) 0.76 change/hr d) 1.25 change/hr 25°C? b) 0.53 change/hr a) 0.25 change/hr
4.2.AWWTP is to treat 5 MGD of wastewater using activated sludge. Five sets of aeration tank followed by five secondary clarifiers to be used of which four of them to be working at any time. The MLSS is 1400 mg/L. What is the solids loading rate if the cross section area is 300 ft² and the flow rate of activated sludge need to be returned from the recycling line is 30%? b) 76 Ib/d.ft² c) 51 Ib/d.ft² d) 63Ib/d.ft² a) 46 Ib/d.ft² 4.3.Two machines working in a room measures (40 m x 10 m x 5 m). Every machine emits an air pollutant (MW=106 g/mole) at a rate of 230 mg/hr. Assume the air pollutant is conservative. How many air changes per hour are needed to maintain a concentration of 0.1 ppm in a STP of 1 atm. and c) 0.76 change/hr d) 1.25 change/hr 25°C? b) 0.53 change/hr a) 0.25 change/hr
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Please solve all the choices
Transcribed Image Text:4.2.AWWTP is to treat 5 MGD of wastewater using activated sludge. Five sets of aeration tank followed
by five secondary clarifiers to be used of which four of them to be working at any time. The MLSS is
1400 mg/L. What is the solids loading rate if the cross section area is 300 ft² and the flow rate of
activated sludge need to be returned from the recycling line is 30%?
b) 76 Ib/d.ft²
c) 51 Ib/d.ft²
d) 63Ib/d.ft²
a) 46 Ib/d.ft²
4.3.Two machines working in a room measures (40 m x 10 m x 5 m). Every machine emits an air
pollutant (MW=106 g/mole) at a rate of 230 mg/hr. Assume the air pollutant is conservative. How
many air changes per hour are needed to maintain a concentration of 0.1 ppm in a STP of 1 atm. and
c) 0.76 change/hr d) 1.25 change/hr
25°C?
b) 0.53 change/hr
a) 0.25 change/hr
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning