C&EE 153 Quiz: Homework 7
9 Jan 2019
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Cee 153 fall 17 homework 7 water treatment. Due: thursday, november 30, 2017. (in class) (no late submission accepted, unless otherwise approved earlier) Calculate the lime dosage required for softening by selective calcium removal for the following water analysis. The chemical constituents in the water are co2 =17. 6 mg/l; ca2+ = 63 mg/l; mg2+= 15 mg=l; na+ = 20 mg/l; alkalinity (hco3-) = 189 mg/l as caco3; so4 mg/l. Assume the plant flow rate is 1. 26 106 m3/day. Given the following data, graph the data for the poliomyelitis virus, using hypobromite as a disinfectant. Chick"s law rate constant and the time required for 99. 99 percent (4 log removals) inactivation of this virus. Visit the web site for the world health organization (www. who. org). Write a referenced essay of up to two pages about a particular pathogen and associated disease that is transmitted through contaminated water.
