11. (Mihelcic and Zimmerman, 2014, 7.36) The wastewater treatment plant for Pine City discharges 1.0 x 10 m³/day of treated waste to the Pine River. Immediately upstream of the treatment plant, the Pine River has an ultimate CBOD of 2.0 mg/L and a flow of 9.0 x 105 m³/day. At a distance of 20 km downstream of the treatment plant, the Pine River has an ultimate CBOD of 10 mg/L. The river has a velocity of 20 km/day. The CBOD decay coefficient is 0.13 (1/day). Determine the concentration of ultimate BOD (La, in mg/L) at the point of mixing. 12. Using the data from problem 11, find the ultimate BOD of the discharged wastewater.

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
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11. (Mihelcic and Zimmerman, 2014, 7.36) The wastewater treatment plant for Pine City
discharges 1.0 x 105 m³/day of treated waste to the Pine River. Immediately upstream of the
treatment plant, the Pine River has an ultimate CBOD of 2.0 mg/L and a flow of 9.0 × 10³
m³/day. At a distance of 20 km downstream of the treatment plant, the Pine River has an
ultimate CBOD of 10 mg/L. The river has a velocity of 20 km/day. The CBOD decay
coefficient is 0.13 (1/day). Determine the concentration of ultimate BOD (La, in mg/L) at the
point of mixing.
12. Using the data from problem 11, find the ultimate BOD of the discharged wastewater.
Transcribed Image Text:11. (Mihelcic and Zimmerman, 2014, 7.36) The wastewater treatment plant for Pine City discharges 1.0 x 105 m³/day of treated waste to the Pine River. Immediately upstream of the treatment plant, the Pine River has an ultimate CBOD of 2.0 mg/L and a flow of 9.0 × 10³ m³/day. At a distance of 20 km downstream of the treatment plant, the Pine River has an ultimate CBOD of 10 mg/L. The river has a velocity of 20 km/day. The CBOD decay coefficient is 0.13 (1/day). Determine the concentration of ultimate BOD (La, in mg/L) at the point of mixing. 12. Using the data from problem 11, find the ultimate BOD of the discharged wastewater.
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