A jar test was conducted on a raw water containing 11 NTU and an alkalinity concentration of 50mg/L (as CACO3). The Turbidity was measured after the mixture was allowed to settle for 30minutes. The jar test are tabulated belowFind the optimal coagulant dose, and the appropriate amount of alkalinity that would beconsumed at the optimal doseDoes the raw water source have sufficient alkalinity?Jar Numbers123456Alum Dose (mg/L)2540506575Turbidity (NTU)9624.55.58.5

Step 1:To determine the optimal coagulant dose and the amount of alkalinity consumed at that dose,…

Answered: A jar test was conducted on a raw water…

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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3. Table below shows the concentration of dissolve oxygen for a BOD test, diluted by 100. Time (days) Diluted sample DO (mg/L) 7.95 1 3.75 2 3.45 2.75 2.15 1.8 i. Determine BOD5 Given the deoxygenation rate coefficient of 0.15 day-1, determine the ultimate BOD ii. iii. Based on answer from (i), identify class of the water sample based on INWQS guideline and propose suitable usage the water.
In standardization, 10.00 mL of Naz C2 04 solution required 39.17 mL of KMN04. Find the molarity of KMNO,. The unknown required 14.44 mL of MnO,. Find Ca in the urine. (Answer: 1.086 x 10 M, 7.840 x 10 M)
The results of a jar test on a surface water supply sample revealed that the optimum dose of alum (Al2(SO4)3.14H2O) as coagulant is 17 mg/L. Furthermore, the water has total alkalinity = 50 mg/L as CaCO3; pH = 7.8; and residual turbidity at optimum alum dose = 4 NTU. The water treatment plant has a mean flow of 10m3/hour. Determine: The kg of alum per year needed in the operation of the plant. The residual alkalinity in the sample, following the addition of alum at optimum dose. Solve parts (a) and (b) if instead of alum, ferric chloride (FeCl3) were used as coagulant. Assume the numerical jar test results are the same as those with alum.
The Volume of NaOH (0.01N) when use ph.ph indicator is 12.4mL and 3mL when use methyl Orange (M.O) and the Volume of Sample is 30mL, Calculate the Total Acidity as mg (CaCO3)/L. (EW for CaCO3 is 50)
Available chlorine in bleaching powder solution is 0.5mg/ml. To obtain a chlorine dose of 0.1 mg/1 in a 300 ml water sample, the amount of bleaching powder solution to be added is ml.
Q.2(a) What will be the influence of using more alkaline/acidic water in boilers? Discuss the type of corrosion resulting from it and their method of prevention. (b) Calculate the hardness in a given hard water sample having the following data. 50 ml of standard hard water containing 1 mg of CaCO3 per ml consumed. 50 ml of standard hard water consumed 25 ml EDTA using eriochrome black T as indicator. 50 ml water sample consumed 40 ml EDTA using the same indicator. 50 ml water sample after boiling consumed 25 ml of EDTA using the same indicator. (c) Discuss the problems of boilers which can be arises due to use of high concentration of alkaline substance along with their prevention and disadvantages.
From water sample, 25 mg/L HCO3" as CacO3, 10 mg/L C032 as Caco3 and 50 mg/L Ca* as CaCO3 were measured. pH was near neutral. What is alkalinity? () mg/L as Cac03 (*Answer in whole number only)
Assume that all solutions are prepared at 25 degrees celsius and the solutes arr completely dissolved. In the lead content analysis of a wastewater sample, 75.00 mL of the original sample was taken and diluted with 125.00 mL deionized water. The diluted sample was found to have a lead content of 19.2 ppb. What is the lead content (in pbb) of the original wastewater sample?
Determine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees).
In the lead content analysis of a wastewater sample, 50.00 mL of the original sample was taken and diluted with 150.00 mL deionized water. The diluted sample was found to have a lead content of 17.8 ppb. What is the lead content (in ppb) of the original wastewater sample? DENSITY VALUES AT 25°C Ethanol: 0.789 g/mL Acetic Acid: 1.05 g/mL Water: 0.997 g/mL
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BOD of a wastewater sample is determined by incubating the BOD bottles at four different temperatures, 5, 15, 20, 35, and 50°C. i The ultimate BOD of the sample incubated at 10°C would be-----compared to the sample at 50°C. ii. The reaction rate constant, k for sample incubated at 35°C would be- compared to the sample incubated at 5°C

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