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)?

An ion exchanger treats 1 MLD of water using an exchanger of capacity 100 kg/day/m3 with rate of flow being 0.5 m3/min/m2. Choose the correct statements assuming total hardness of water equal to 84 mg/1 as Cao. Total hardness of water is equal to 150 mg/l as CaCO3. Correct Option B Sodium Alumino - Silicates may be used as ion-exchanger. Correct Option lon exchanger can result in removing complete hardness. Correct Option Correct Option The height of ion exchanger required is 1.08 m if hardness of water is taken as 150 mg/1 as CacO3.

2. At what point in a treatment system is ion exchange normally used?

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Pipe specific A contains a fluid of 3 m gravity 1.30 under a pressure of 110 kN/ m² contains and pipe B of specific gravity oil 1 m 0.88 under 170 kN/ m² pressure deflection Compute the of the mercury. Mercury

..............Wh@t is the equivalent head of kerosene (s=.9) annd mercury( s=14.2). For a 4m head of water.......

Please choose the correct answer for each question: 1. Activity of a gas in equilibrium with solution is ______? A. its partial pressure; B.1.0;   C. its molar concentration;   D. 0.0 2. During a sorption procedure, the substance transferred from the gas or liquid phase to the solid phase is called ______ A. sorbent; B. sorbate;   C. partition;   D. none of the above 3. When a chemical has a lower KOW, it is more ______ A. hydrophobic; B. hydrophilic;   C. more absorbable;   D. less absorbable 4. _____ occurs on the adsorbent surface A. Adsorption; B. Sorption;   C. Absorption;   D. Adsorption and absorption 5. _____ addresses the change in the amount of a substance of interest with time. A. The equilibrium approach; B. The kinetic approach;   C. Henry’s Law;   D. Freudlich isotherm equation

The return line in a secondary clarifier Returns sludge at a lower concentration than in the aerator O Returns only volatile material O Returns sludge at a higher concentration than in the aerator Returns sludge at the same concentration as in the aerator

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