A silver (Ag) electroplating plant producing a wastewater stream contains 5 wt% Ag which need to be treated before disposal. The wastewater is fed to a treatment tour where 95% of the fed Ag is recovered, while residual liquid water is sent to waste pond. Maximum capacity of the treatment tour is 6000 kg wastewater/hr. When the fed wastewater stream at a rate higher then the capacity of the treatment tour, the excess wastewater bypass the unit and combines with the residual liquid water from the treatment tour and goes to the waste pond. Initially flowrate of the fed wastewater (Mo) is in the range of 4000-5000 kg/h, suddenly after 30 hours the flowrate varies according to a linear equation, M (kg fed wastewater at time t) = 50t (hr) + Mo(initial wastewater flowrate). The linear flowrate continue according to the equation, however after 60 hours the flowrate has reached its steady state and continue at constant flowrate value. Choose one Mo from the given range, draw process flow diagram of the system an determine composition of each stream for the three M conditions (initial flowrate, linea flowrate and constant flowrate).

A silver (Ag) electroplating plant producing a wastewater stream contains 5 wt% Ag which need to be treated before disposal. The wastewater is fed to a treatment tour where 95% of the fed Ag is recovered, while residual liquid water is sent to waste pond. Maximum capacity of the treatment tour is 6000 kg wastewater/hr. When the fed wastewater stream at a rate higher then the capacity of the treatment tour, the excess wastewater bypass the unit and combines with the residual liquid water from the treatment tour and goes to the waste pond. Initially flowrate of the fed wastewater (Mo) is in the range of 4000-5000 kg/h, suddenly after 30 hours the flowrate varies according to a linear equation, M (kg fed wastewater at time t) = 50t (hr) + Mo(initial wastewater flowrate). The linear flowrate continue according to the equation, however after 60 hours the flowrate has reached its steady state and continue at constant flowrate value. Choose one Mo from the given range, draw process flow diagram of the system an determine composition of each stream for the three M conditions (initial flowrate, linea flowrate and constant flowrate).

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.12P

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