A water contains 50.40 mg · L-1 as CaCO3 of carbon dioxide, 190.00 mg · L-1 as CacO3 of Ca2+ and 55.00 mg · L-1 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-1) if the plant treats water at a rate of 2.935 m3 · 5-1? Assume that the effluent water contains no carbon dioxide, 30.0 mg · L-1 as Caco3 of Ca2+ and 10.0 mg · L-1 as Caco3 of Mg2+. Be sure to calculate the mass of Caco3 and Mg(OH)2 sludge produced each day.

A water contains 50.40 mg · L-1 as CaCO3 of carbon dioxide, 190.00 mg · L-1 as CacO3 of Ca2+ and 55.00 mg · L-1 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-1) if the plant treats water at a rate of 2.935 m3 · 5-1? Assume that the effluent water contains no carbon dioxide, 30.0 mg · L-1 as Caco3 of Ca2+ and 10.0 mg · L-1 as Caco3 of Mg2+. Be sure to calculate the mass of Caco3 and Mg(OH)2 sludge produced each day.

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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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.
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
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 mg/L as CaCO3: Ca2+ = 120, Mg2+ = 30, HCO3 - = 70, CO2 = 10
A water sample is tested to have an alkalinity of 300 mg/L as CaCO3. The Ca^2+ concentration is 120 mg/L as the ion, and the Mg^2+ concentration is 20 mg/L as the ion. The pH is 8.1. Find the total, carbonate, and noncarbonate hardness.
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
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.
Water analysis was carried out for a groundwater sample. The sum of the anions is equal to the sum of the cations. Calculatea) Total hardnessb) Carbonate and Non-Carbonate Hardness Hardnessc) Alkalinity
(d) Ca(HCO3)2 = 150 mg/L; Mg(HCO3)2 = 200 mg/L; CaSO4 = 180 mg/L; MgCl2 = 95 mg/L; CaCl2 = 137 mg/L; turbidity = 15 mg/L; NaCl = 58.5 mg/L. Calculate: (i) Carbonate and non-carbonate hardness in degree Clark. (ii) The cost of limesoda process, if lime (95% pure) is Rs.200/10 Kg and soda (86%pure) is Rs. 400/10 Kg for softening of 150,000 liters of hard water using Al2(SO4)3 as a coagulant @ 28.5 mg/L. (iii) A hard water sample having 530 ppm CaCO3 equivalent hardness was completely softened on passing over a zeolite bed. The exhausted bed was subsequently regenerated using 75 liters of 45 percent brine solution. Calculate the quantity of hard water that has been softened using zeolite softener.
From the water analysis presented below, determine the amount of lime and soda (in mg/L as CaCO3) necessary to soften the water to 90.00 mg/L hardness as CaCO3.
The particles created at the conclusion of the rapid mix step associated with the alum addition in problem 2 have an average diameter of 20 µm and specific gravity of 2.0. During flocculation, the size increases to 75 µm, but the more open aggregate structure decreases the specific gravity to 1.9. The water temp is 18 °C. Calculate the settling velocity of both particles. How does the change in particle properties impact the settling velocity? Make sure to check the Reynolds Number.
I) Two aggregates (Al and A2) were obtained from the field. A sieve analysis was performed on each sample, and the samples (originally 500g in mass) were brought to the oven dry condition (OD) and weighed. Data was obtained for each of the aggregates and is presented in the tables below. (Density of water-1g/cm) Table 1. Results from sieve analysis. Sieve Size Opening (mm) Weight of Aggregate retained (g) A1 A2 3/8" 9.5 No. 4 4.75 65 No. 8 2.36 60 25 No. 16 1.18 100 396 No. 30 0.6 50 No. 50 0.3 118.5 10 No. 100 0.15 75 15 Pan 75 Table 2. Absorption capacity and moisture content data. Al A2 500 g 500 g Field Weight Oven Dry Weight Absorption Capacity (%) 0.7 % 498.5 g 496 g 0.6 % a) Plot the grading curve for each aggregate (x-axis: sieve opening, y-axis: %passing). (Note: In the grading curves, you must show all data points. You can draw the gradation chart using excel or by hand. If you draw by hand, you have to use a ruler. The format of the gradation chart should be same as in the…