Two wastewater streams A and B having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is 20° C and the temperature of the stream C is 10°C. It is given that The 5-day BOD of the stream A measured at 20°C = 50 mg/l BOD rate constant (base10) at 20° C = 0.115 per day Temperature coefficient = 1.135 The 5-day BOD (in mg/l up to one decimal place) of the stream C. Calculated at 10°C is ________.

GATE Civil Engineering (CE) 2017 Shift 1 Solved Paper

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Two wastewater streams A and B having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is 20° C and the temperature of the stream C is 10°C. It is given that

The 5-day BOD of the stream A measured at 20°C = 50 mg/l
BOD rate constant (base10) at 20° C = 0.115 per day
Temperature coefficient = 1.135

The 5-day BOD (in mg/l up to one decimal place) of the stream C. Calculated at 10°C is ________.

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