1e. What amount of lime and/or soda ash, in mg/L as CaCO3, is required 6-19 to...
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
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
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).
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-...
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...
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
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 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)...
(15 pts) Calculate the lime and soda ash for Hardness removal of a water with the following water chemistry: CO2/H2CO3 = 0.7 meq/L Ca(HCO3)2 3.5 meq/L CaSO4 = 1.8 meq/L MgS04 2.0 meq/L 1. (15 pts) Calculate the lime and soda ash for Hardness removal of a water with the following water chemistry: CO2/H2CO3 = 0.7 meq/L Ca(HCO3)2 3.5 meq/L CaSO4 = 1.8 meq/L MgS04 2.0 meq/L 1.
Groundwater is softened to 80 mg/L hardness as CaCO_3 using a lime/soda process. The groundwater initially has 2 mg/L CO_2, 100 mg/L Ca^2+, 8 mg/L Mg^2+, 260 mg/L HCO_3^-, and other anions. What amount of lime and/or soda ash, in mg/L as CaCO_3, is required? Assume that Mg^2+ less than 40 mg/L as CaCO_3 does not need to be removed.