70,000 litres of water per day, if the water contains the following impurities:Example 9.33. Calculate the annual cost of slaked lime and soda for treating100 рртMg(HCO),CaSO,MgSO4SiO,CaCO3 = 280 ppmNaCl %3D 35 ррт110 ррт%3D= 80 ppmMgCl, = 138 ppmFe,0, = 55 ppmPurity of slaked lime is 85% and that of soda is 100%. Slaked lime costs 780per quintal and soda for 400 per quintal.[Atomic weights in gm : Ca = 40, Mg = 24, S = 32, Cl = 35.5, C = 12, 0 = 16,Na = 23, Fe = 56, and Si = 28].%3D: 40 ррт.%3D%3D

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70,000 litres of water per day, if the water contains the following impurities: Example 9.33. Calculate the annual cost of slaked lime and soda for treating — 100 ррт Mg(HCO) CaSO4 MGSO4 SiO, Purity of slaked lime is 85% and that of soda is 100%. Slaked lime costs 780 CaCO3 = 280 ppm NaCl = 35 ppm %3D 110 ррт %3D 80 ppm MgCl, = 138 ppm Fe,O3 = 55 ppm - 40 ррт. per quintal and soda for 400 per quintal. [Atomic weights in gm : Ca = 40, Mg = 24, S = 32, Cl = 35.5, C = 12, 0 = 16, %3D Na = 23, Fe = 56, and Si = 28]. %3D %3D

70,000 litres of water per day, if the water contains the following impurities: Example 9.33. Calculate the annual cost of slaked lime and soda for treating — 100 ррт Mg(HCO) CaSO4 MGSO4 SiO, Purity of slaked lime is 85% and that of soda is 100%. Slaked lime costs 780 CaCO3 = 280 ppm NaCl = 35 ppm %3D 110 ррт %3D 80 ppm MgCl, = 138 ppm Fe,O3 = 55 ppm - 40 ррт. per quintal and soda for 400 per quintal. [Atomic weights in gm : Ca = 40, Mg = 24, S = 32, Cl = 35.5, C = 12, 0 = 16, %3D Na = 23, Fe = 56, and Si = 28]. %3D %3D

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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7. Calculate the amount of lime (84%) and soda (92%) required for treatment of 20,000 litres of water, whose analysis is as follows: Ca(HCO3)2 = 40.5 ppm; Mg(HCO3)2 = 36.5 ppm; CaSO4 = 34 ppm; CaCl2 = 27.75 ppm; MgSO4 = 30.0 ppm; SiO2 = 3.5 ppm; NaCl = 10 ppm. Also calculate the temporary & permanent hardness of water sample.
4. Lime and soda process is to be designed for the water analysis presented below, The quantity of water to be treated is 12 MGD. Estimate the total hardness, carbonate hardness and non-carbonate hardness. Determine the amount of lime and soda to soften the water to a final hardness of 95 moA as CaCO, Estimate the annual cost of softening if the cost of dry lime (CaO) is a dime per kilogram and cost of soda ash (Na-CO,) is 20 cents per kilogram (assume both compounds to be 90% pure). (AW: Ca-40, Mg-24.3, Na-23, C-12,0-16) acl Constituent mgl mg/las C&CO, Ca 12 Alkalinity CO2 150 Show transcribed image text
= 165.0 doi20u0Eoooti = 5.0 CO2 4-22. Determine the lime and soda ash dose, in mg/L as CaCO3 to soften the following water to a final hardness of less than 120.0 mg/L as CACO3. If the price of lime, pui chased as CaO, is $61.70 per megagram (Mg), and the price of soda ash, purchased as NazCO3, is $172.50 per Mg, what is the annual chemical cost of treating 1.35 m of this water? Assume the lime is 87% pure and the soda ash is 97% pure. The ion concentrations reported below are all mg/L as CaCO3. Ca2+ = 293.0 Mg2+ = 55.0 HCO, = 301.0 %3D CO2 = 5.0
2) Two aggregates (Al and A2) were obtained from the field. They were brought to the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the table below. (Density of water=lg/cm³) Table 1. Absorption capacity and moisture content data. A1 A2 600 g 600 g Field Weight Oven Dry Weight Absorption Capacity (%) | 0.6 % 595.3 g 598.3 g 0.7 % a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry). For each sample would you add water or dry the sample to bring it to SSD state? Determine the expected mass of each sample in the SSD state. b) If the bulk volume Al oven dry is 220 cm³ and the bulk volume of A2 oven dry is 250 cm³, determine the bulk oven dry specific gravity for each aggregate, Al and A2.
A sample of wet aggregate 297.2 N. After drying in an oven, this sample weighed 281.5. The absorption of this aggregates is 2.5%. Calculate the percent of free water in the original wet sample. Weight of the wet aggregates (Wwet) = 297.2 N Weight of the dry aggregates (Wdry) = 281.5 N
2) Two aggregates (Al and A2) were obtained from the field. They were brought to the oven dry condition (OD) and weighed. Data for each of the aggregates is presented in the table below. (Density of water=1g/cm') Table 1. Absorption capacity and moisture content data. A1 A2 Field Weight 600 g 600 g 598.3 g Oven Dry Weight Absorption Capacity (%) 0.6 % 595.3 g 0.7% a) Describe the field moisture state of each aggregate, Al and A2 (i.e. wet, SSD, or air dry). For each sample would you add water or dry the sample to bring it to SSD state? Determine the expected mass of each sample in the SSD state. b) If the bulk volume Al oven dry is 220 cm and the bulk volume of A2 oven dry is 250 cm2, determine the bulk oven dry specific gravity for each aggregate, Al and A2. MONSTER E12 PRT SC PAUSE う
18. Determine the lime and soda ash dose, in mg/L as CaCO3, to soften the following water to a final hardness of 90.0 mg/L as CACO3. If the price of lime, purchased as CaO, is $61.70 per megagram (Mg), and the price of soda ash, purchased as NazCO3 is $172.50 per Mg, what is the annual chemical cost of treating 0.050 m'/s of this water? Assume the lime is 90% pure and the soda ash is 97% pure. The ion concen- trations reported below are all mg/L as CaCO3. Ca2+ =137.0 Mg HCO, =197.0 =9.0 %3D 2+ = 40.0 %3D CO2
Determined and fil-up the unknown data of the given table. Physical Properties Mix Design Specific Dry-rodded Materials Fineness Estimated Absolute gravity weight ft3 Absorption modulus Ib/yd3 Ib/yd3 (SSD) Ib/ft3 Cement 3.15 ? ? Sand 2.64 0.7 2.72 11/2 62.4 Ib/ft Gravel 2.67 0.5 100.5 Water ? Vol. of entrapped air w/C = ? GIVEN: Specification Requirements compressive strength, psi 4000 Slump, in. 3 4
4-23. Determine the lime and soda ash dose, in mg/L as CaCO3, to soften the following water to a final hardness of less than 90.0 mg/L as CaCO3. If the price of lime, pur- chased as CaO, is $61.70 per megagram (Mg), and the price of soda ash, purchased as Na2CO3, is $172.50 per Mg. What is the annual chemical cost of treating 0.050 m3/s of this water? Assume the lime is 90% pure and the soda ash is 97% pure. Th ion concentrations reported below are all mg/L as CaCO3. Ca?+ 2+ Mg = 137.0 =60.0 0.TE HCO, = 197.0 CO, 3D9.0
YALVE 3) Constont level constent level k 0.26 O-63 soyuB 0.48m According to the above figure given 760 me rater is collected in the container in 15 minutes.If kA is giver as kA= 2x 10m/s..calculate the permeability of isoil B (kR).Length of the Systen perpendicaelar to the Figure plane (thickness) is coefficent O.15 m. -0.2m
Compute the quantities of lime and soda required to soften raw Ex water containing alkalinity of 220 mg /1 ; hardness as CaCl, = 40 mg |1, and as MGSO, = 60 mg/l. Water required to be treated is 1 million litres. %3D
Note: Read the question carefully and give me right solution according to the question. I want clear solution with clear steps. A water contains 38.50 mg/L as CaCO3 of carbon dioxide, 288.00 mg/L as CaCO3 of Ca2+ and 53.00 mg/L as CaCO3 of Mg2+. All of the hardness is carbonate hardness. Using the stoichiometry of the lime soda ash softening equations, what is the daily sludge production (in dry weight, kg/day) if the plant treats water at a rate of 56.00 MGD? Assume that the effluent water contains no carbon dioxide, 30.0 mg/L as CaCO3 of Ca2+ and 10.0 mg/L as CaCO3 of Mg2+. Be sure to calculate the mass of CaCO3 and Mg(OH)2 sludge produced each day.