A conventional surface water treatment plant with coagulation, flocculation, sed
ID: 1920157 • Letter: A
Question
A conventional surface water treatment plant with coagulation, flocculation, sedimentation and filtration produces filtered water with a turbidity less than 0.35 NTU, pH 7.5 and a temperature of 10 degC on a day when the peak hourly flow is 2.0 MGD. After filtration the water is chlorinated in a baffled storage tank and then pumped to the first customer in a one mile 12-inch diameter pipe. The effluent response to a tracer analysis of the storage tank is given in the following table. The residual chlorine concentration at the effluent end of the storage tank is 0.6 mg/L and at the end of the pipeline is 0.2 mg/L.
A conventional surface water treatment plant with coagulation, flocculation, sedimentation and filtration produces filtered water with a turbidity less than 0.35 NTU, pH 7.5 and a temperature of 10 degree C on a day when the peak hourly flow is 2.0 MGD. After filtration the water is chlorinated in a baffled storage tank and then pumped to the first customer in a one mile 12-in diameter pipe. The effluent response to a tracer analysis of the storage tank is given in the following table. The residual chlorine concentration at the effluent end of the storage tank is 0.6 mg/L and at the end of the pipeline is 0.2 mg/L. Tracer Test for storage Tank. Effluent measurements for a step (continuous) input of 2.0 mg/L initiated at time = 0. Required: a. Determine whether the C-t regulatory requirement has been met. b. If the water system wanted to use a chloramine disinfectant in the pipeline at a 0.4 mg/L concentration would the C-t requirements be met? Why would the system operators consider changing to chloramine for the post disinfection treatment? c. An ozone disinfection system is being considered in place of the chlorination system and storage tank. What contact time would be required for the ozone contact tank if the residual concentration at the effluent end of the tank is 0.2 mg/L. (Assume no ozone residual is maintained in the pipe).Explanation / Answer
This looks like a similar problem.
I don't know how to solve this.
But if you can this may help you.
http://www.learningace.com/doc/7695169/b10754f7e9b204a5ff3abde0bf31e914/chapter-11-chemical-treatment-processes
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.