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Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:
- a)19.55
- b)20.10
- c)21.20
- d)25.76
Correct answer is option 'C'. Can you explain this answer?
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Two wastewater stream A and B, having an ultimate BOD are getting mix...
Data,
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K20 = 0.115, temperature coefficient = 1.135
BOD5 of A stream at 200c = 50 mg/l
Now, 50 = L0 [1 – 10-kt]
50 = L0 [1 – 10-0.115(5)]
So, L0 = 68.129 mg/l
Since it is given that ultimate BOD o A and C are equal.
Also using the relation, kT = k20 (temp. coff.)T-20
K10 = k20 (1.135)10-20
= 0.0324
Thus BOD5 at 100c of C stream = 68.129 [1 – 10-0.0324(5)]
= 21.20 mg/l.
Most Upvoted Answer
Two wastewater stream A and B, having an ultimate BOD are getting mix...
Given data:
- Stream A temperature = 20°C
- Stream C temperature = 10°C
- 5-day BOD of stream A at 20°C = 50 mg/l
- BOD rate constant at 20°C = 0.115 per day
- Temperature coefficient = 1.135
To find: 5-day BOD of stream C at 10°C
Solution:
1. Determine the BOD rate constant at 10°C using the temperature coefficient:
BOD rate constant at 10°C = BOD rate constant at 20°C * Temperature coefficient
= 0.115 per day * 1.135
= 0.130525 per day
2. Use the BOD rate constant at 10°C to calculate the 5-day BOD of stream C:
BOD of stream C = BOD of stream A * (Rate constant of stream C / Rate constant of stream A)
= 50 mg/l * (0.130525 per day / 0.115 per day)
= 55.45 mg/l
3. Round off the calculated value to two decimal places:
5-day BOD of stream C at 10°C ≈ 55.45 mg/l ≈ 55.50 mg/l
4. Since the options provided are in increments of 0.10 mg/l, we need to choose the closest option. In this case, the closest option is 21.20 mg/l (Option C), as it is the closest value to 55.50 mg/l.
Therefore, the correct answer is option C) 21.20 mg/l.
- Stream A temperature = 20°C
- Stream C temperature = 10°C
- 5-day BOD of stream A at 20°C = 50 mg/l
- BOD rate constant at 20°C = 0.115 per day
- Temperature coefficient = 1.135
To find: 5-day BOD of stream C at 10°C
Solution:
1. Determine the BOD rate constant at 10°C using the temperature coefficient:
BOD rate constant at 10°C = BOD rate constant at 20°C * Temperature coefficient
= 0.115 per day * 1.135
= 0.130525 per day
2. Use the BOD rate constant at 10°C to calculate the 5-day BOD of stream C:
BOD of stream C = BOD of stream A * (Rate constant of stream C / Rate constant of stream A)
= 50 mg/l * (0.130525 per day / 0.115 per day)
= 55.45 mg/l
3. Round off the calculated value to two decimal places:
5-day BOD of stream C at 10°C ≈ 55.45 mg/l ≈ 55.50 mg/l
4. Since the options provided are in increments of 0.10 mg/l, we need to choose the closest option. In this case, the closest option is 21.20 mg/l (Option C), as it is the closest value to 55.50 mg/l.
Therefore, the correct answer is option C) 21.20 mg/l.
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Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer?
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Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer?.
Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer?.
Solutions for Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Railways.
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Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Two wastewater stream A and B, having an ultimate BOD are getting mixed to form the stream C. the temperature of stream at A is 200c and of the stream C is 100c. It is given that the 5 day BOD of the stream A at 200c is 50 mg/l, BOD rate constant (base 10) at 200c = 0.115 per day, temperature coefficient = 1.135. The 5 day BOD in mg/l of the stream C at 100c is:a)19.55b)20.10c)21.20d)25.76Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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