How many pounds per day (lbs/day) of lime and soda ash need to be delivered daily to a plant treating groundwater with the following characteristics (do not worry about adding any safety factor, even though you would in the real world): Calcium Carbonate Hardness (CaCH) = 200 mg/L as Calcium Carbonate Magnesium Non-Carbonate Hardness 100 mg/L as Calcium Carbonate (Use soda ash; carbon dioxide is not an option) Alkalinity= 200 mg/L as Calcium Carbonate Flow Treated = 10 MGD The answers are expressed in units of lbs/day with lime first followed by soda ash O 4,800 and 3,100 O 22,600 and 31,000 O 15,000 and 7,400 O 18,500 and 8,800

How many pounds per day (lbs/day) of lime and soda ash need to be delivered daily to a plant treating groundwater with the following characteristics (do not worry about adding any safety factor, even though you would in the real world): Calcium Carbonate Hardness (CaCH) = 200 mg/L as Calcium Carbonate Magnesium Non-Carbonate Hardness 100 mg/L as Calcium Carbonate (Use soda ash; carbon dioxide is not an option) Alkalinity= 200 mg/L as Calcium Carbonate Flow Treated = 10 MGD The answers are expressed in units of lbs/day with lime first followed by soda ash O 4,800 and 3,100 O 22,600 and 31,000 O 15,000 and 7,400 O 18,500 and 8,800

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

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
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.
9-2 (15 pts) Determine the alkalinity, total hardness, carbonate hardness, and non-carbonate hardness (in mg/L CaCO3) for the water (pH 7.4) with the following chemical concentrations. Calculate the doses of lime and soda ash to soften this water. Constituent Concentration, mg/L Ca2+ 95 Mg2+ 13.5 Na 25.8 HCO3 244 SO 2- 73 CI 67.8 H2CO3 7.7
A sample of water was analyzed through titration with 0.01N HCI. 150 mL of the water required 30.0 ml of 0.01 N HCI to titrate it to the phenolphthalein endpoint and 14.0 mL of the same HCI solution to titrate it further to the methyl orange endpoint. Assuming the sample contains no calcite particles, what are the total and carbonate alkalinities of the sample in meq/liter and the total alkalinity in mg/liter as CaCo,? Also, what are the concentrations of the major alkalinity species?
A lime-soda softening plant treats a flow of 150 MGD, and the water has a hardness of 225 mg/ℓ as CaCO3, an alkalinity of 178 mg/ℓ as CaCO3, a Mg+2 ion content of 39 mg/ℓ, and 4 mg/ℓ of CO2. The commercial grade of quicklime has a purity of 85%, and the soda ash has a purity of 95%. Determine a. The pounds of quicklime and soda ash required per million gallons. b. The tons of quicklime and soda ash required per month if a month is considered to be 30 days.
Given the following octanol water partition coefficients (Kow), indicate for which compounds is soil vapor extraction (SVE) a candidate process for removing the compound from the vadose zone of a contaminated soil. Assume that low values of Kow are <10. Provide a relative ranking of contaminants in terms of potential efficiency for SVE treatment. Compound Log Kow Trichloroethene 2.38 4.88 6.01 1.38 3.15 1.46 3.9 6.19 0.26 Pyrene PCBs Vinyl chloride Ethyl benzene Phenol Lindane DDT 2-Butanone (methyl ethyl ketone)
Q2: (12.5 Marks) 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 (5×10³. m³/d), Calculate? 1- Draw the treatment units scheme 2- Calculate the (SO4) 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 CO₂ Ca+2 Hardness Mg+2 Hardness Na+1 Alkalinity SO42 CH¹ K+1 HCO3¹ 90 37.5 62.5 Concentration 6.6 mg/L as mg/L as 19.55 mg/L as ? 42.6 13.685 (mg/L) (CaCO3) (CaCO3) (CaCO3) 39.1 Atomic Mass 44 40 24.3 23 96 35.5
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.
A groundwater contains the following constituents: CO2 = 9.6 mg/L Ca?+ = 95.2 mg/L 1. Mg?+ = 25.8 mg/L HCO3 = 198 mg/L as CaCO3 The facility is to treat 50 x 106 L/d of water from this source using lime-soda ash to reduce the hardness. Determine the quicklime and soda ash dosages for softening to stoichiometric limits. Assume the lime is 90% Cao by weight and the soda ash is pure sodium carbonate.
A water sample was examined and following observations were made: Species Concentration(milliequivalent) Calcium, Ca2 10 Magnesium, Mg2 Chloride, Cl 4 Sulphate, SO,- 11 Use above data, and choose the correct statement(s). Permanent hardness is caused by NO3 , S042, ions. Correct Option B Carbonate hardness of sample is 150 mg/l as Caco3 Your answer is IN-CORRECT Special method such as base-exchange process can be used to remove permanent hardness. Your option is Correct D Non-carbonate hardness in a 200 ml sample of given water is 150 mg as CaCo3- Correct Option
In a laboratory we are doing a series of tests on a sample of aggregate. This sample has the wet weight of 586.3 gr and dry weight of 513.9 gr. If the absorption of this aggregate is measured as 2.23%. Calculate the percent of free water in the original wet sample.
Determine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees).