Two-stage softening: A water with the ionic characteristics shown below is to be softened by the lime-soda-ash-excess-lime process. The lime used is (85 %) pure and the soda ash is (85 %) pure And a flow of (5x10³. m³/d), Calculate ? 1- Draw the treatment units scheme 2- Calculate the (SO42) Concentration in mg/L unit? 3- Calculate the required chemical quantities in (meq/L) unit.? 4- Draw a bar diagram of the finished water.? 5- Calculate The Total Hardness in mg/L Unit? Element Concentration (mg/L) Atomic Mass CO₂ 6.6 44 Ca+2 Hardness 90 mg/L as (CaCO3) 40 Mg¹2 Hardness Na+1 37.5 mg/L as 19.55 (CaCO3) 24.3 23 Alkalinity HCO3-¹ 62.5 mg/L as (CaCO3) 61 SO4² ? 96 CH¹ 42.6 35.5 K+¹ 13.685 39.1
Two-stage softening: A water with the ionic characteristics shown below is to be softened by the lime-soda-ash-excess-lime process. The lime used is (85 %) pure and the soda ash is (85 %) pure And a flow of (5x10³. m³/d), Calculate ? 1- Draw the treatment units scheme 2- Calculate the (SO42) Concentration in mg/L unit? 3- Calculate the required chemical quantities in (meq/L) unit.? 4- Draw a bar diagram of the finished water.? 5- Calculate The Total Hardness in mg/L Unit? Element Concentration (mg/L) Atomic Mass CO₂ 6.6 44 Ca+2 Hardness 90 mg/L as (CaCO3) 40 Mg¹2 Hardness Na+1 37.5 mg/L as 19.55 (CaCO3) 24.3 23 Alkalinity HCO3-¹ 62.5 mg/L as (CaCO3) 61 SO4² ? 96 CH¹ 42.6 35.5 K+¹ 13.685 39.1
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Two-stage softening: A water with the ionic characteristics shown below is to be
softened by the lime-soda-ash-excess-lime process. The lime used is (85 %) pure and
the soda ash is (85 %) pure And a flow of (5x10³. m³/d), Calculate ?
1- Draw the treatment units scheme
2- Calculate the (SO42) Concentration in mg/L unit?
3- Calculate the required chemical quantities in (meq/L) unit.?
4- Draw a bar diagram of the finished water.?
5- Calculate The Total Hardness in mg/L Unit?
Element
Concentration
(mg/L)
Atomic Mass
CO₂
6.6
44
Cat2
Hardness
90
mg/L as
(CaCO3)
40
Mg¹2
Hardness
Na+1
37.5
mg/L as 19.55
(CaCO3)
24.3
23
Alkalinity
HCO3-¹
62.5
mg/L as
(CaCO3)
61
SO4²
?
96
CH¹
42.6
35.5
K+1
13.685
39.1
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