Water quality problems
A rule of thumb suggests that 1 mg/L of alum destroys 0.5 mg/L of alkalinity as CaCO3.
1.Use your knowledge of coagulation chemistry to prove that this is approximately true
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Order Paper Now2.Using this rule of thumb, would the natural alkalinity of the water shown below be sufficient to add 80 mg/L alum, or would we need to add NaOH to prevent the pH from dropping?
A square rapid-mixing basin, with a depth of water equal to 1.25 times the width is to be designed for a flow of 2.0 million gallons per day. The RMS velocity gradient (G) is to be 790 s-1, the detention time is 40 sec, the operating temperature is 50oF, and the turbine shaft speed (i.e. the impeller rotation speed) is 100 rpm. Calculate:
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