10–36 A water has a pH of 8.00 and a temperature of 10°C. A 3.00 log inactivation of Giardia cysts is required.A chlorine concentration of 1.20 mg · L−1 is to be used. The water is treated at a rate of 2.409 m3 · s−1.What is the design volume of the chlorine contacting chamber (in m3)?

Two materials, A and B, are to be separated using two unit operations, 1 and 2. The feed has 10 tons/h A and 4 tons/h B. The split (fraction of material rejected by each operation) is given in Table P5-14. a. Which sequence of operations, (l?2) or (2?1), will yield the greatest recovery of material A? b. What will be the purity of material A using that sequence? c. What will be the efficiency of separation for the entire process train with regard to material A using the Worrell-Stesed equation?

Compare the masses and volumes of water, concrete, sand, and wood needed to store 106 Btu of heat if the operating temperatures are Tc = 85F and Th = 180F. In each case, calculate the edge length of a square storage unit with a height of 8 ft.

Obtain the values of vapor pressures of alcohol, water, and glycerin at a room temperature of 20 C.