Determine the lime and soda ash dose, in mg/l as
CaCO3, to soften the following water to a final hardness of 80 mg/l
as CaCO3. The ion concentrations reported below are all in mg/l as
CaCO3.
Ca2+ = 120
Mg2+ = 30
HCO3- = 70
CO2 = 10
Determine the lime and soda ash dose, in mg/l as CaCO3, to soften the following water...
Determine the lime and soda ask dose, in mg/L as CaCOs to soften the following water to a final hardness of 70.0 mg/L as CaCO3. The ion concentrations reported below all as CaCO3. 6-16. Determine the lime and soda ash dose, in mg/L as CaCO3 to soften the following water to a final hardness of 70.0 mg/L as CaCO3. The ion con- centrations reported below are all as CaCO2 Ca2+ 220.0 Mg2+一75.0 HCO3 265.0 CO2 17.0 Answers: Total lime addition-...
3. Determine the lime and soda ash dose, in mg/L as Ca(OH)2 and Na2CO3, to soften the water of a village to a final hardness of 40.0 mg/L as CaCO3. Chemical analysis showed that the water contains Na+ (50 mg/L), Ca2+ (150 mg/L), Mg²+ (30 mg/L, HCO3 (100 mg/Las CaCO3), Cl (80 mg/L). and CO2 (5.0 mg/L).
What amount of lime, in mg/L as CaCO3, is required to soften the village of Lime Ridge's water to 80 mg/L hardness as CaCO3 Compound Concentration, mg/L as CaCO3 CO2 4.6 Ca2+ 237.9 Mg2+ 62.2 HCO3- 268 SO42- 32.1
1e. What amount of lime and/or soda ash, in mg/L as CaCO3, is required 6-19 to soften the Village of Zap's water to 80.0 mg/L hardness as CaCO3? Compound CO2 Ca2+ Mg нсоз Concentration, mg/L as CaCO3 44.2 87.4 96.3 204.6 73.8 SO so
The following water quality data are available for a community Water quality Ca2+ = 60 mg/l (as species) Mg2+ = 40 mg/l (as species) HCO3- = 220 mg/l as CaCO3 CO2 = 7 mg/l (as species) pH = 7.6 Final desired hardness = 80 mg/l as CaCO3. The flow rate of the treatment plant is 0.24 m3/s. a. Calculate the total, carbonate, and non-carbonate hardness b. Calculate the amount of lime (as mg/l of CaO) needed to soften the water...
The chemical composition of a water sample is given in the table below. The goal hardness is 80 mg/L as CaCO3 Water composition (mg/L): Ca2+ HCO3 15 SO42- Na* CO2 242 Mg2+ 56 (a) Convert the given ionic concentrations in mg/L to mg/L as CaCO3 (b) What is the total hardness, carbonate hardness and non-carbonate hardness? (C) What is the lime-soda dosage to soften the water to a hardness of 80 mg/L as CaCO3 (d) What is the annual cost...
QUESTION 3 Given the following information determine the annual chemical cost to soften the water in a treatment plant. Water flow rate = 0.04 m3/s Ca2+ = 167 mg/L as CaCO3 Mg2+ = 21 mg/L as CaCO3 HCO3 = 167+21 mg/L as CaCO3 CO2 = 7 mg/L as CaCO3 Cost of lime (purchased as Cao)= 76.7 per megagram (Mg) Cost of soda ash (purchase as Na2CO3) = 261.1 per megagram (Mg) Assume the lime is 90 percent pure and soda...
Question 30 (4 points) Groundwater defined by the following analysis is to be softened by lime-soda ash treatment. The target total hardness is 90 mg/L as CaCO3, in which CH = 40 mg/L as CaCO3 CO2 = 30 mg/L as CO2 = 120 mg/L as Ca2+ Ca2+ Mg2+ = 48 mg/L as Mg2+ Nat = 46 mg/L as Nat HCO3 = 200 mg/L as Cacos SO42- 96 mg/L as SO42- 35 mg/L as CI FORMULA CO2 CaCO3 EQUIVALENT WEIGHT (S/EW)...
2. Calculate the amount of lime as Ca(OH)2 (90% pure) and soda ash (93% pure) (each chemical in lb/d) needed to soften the following water using the two-stage excess lime-soda ash treatment process designed for an average daily flow of 4.0 mgd. 15 mg/L as CO2 CO2 Ca2+ 60 mg/L 24 mg/L Na 46 mg/L HCO3 = 200 mg/L 96 mg/L 35 mg/L = CF
Determine the hardness of this water in units of mg/L as CaCO3. Hardness is the sum of the concentrations of multivalent cations in the water, which in this case include Ca (as Ca2+) and Mg (as Mg2+). Hardness is expressed in “equivalent” units or “CaCO3” units.