Table Q1-1 shows the list of the constituents of the treated water in a watertreatment facilities prior to discharge. Based on the National Standard forDrinking Water Quality (NSDWQ), state the maximum acceptable value foreach of the parameter. Provide a conventional treatment for each of theparameter if the current treatment is inadequate.Table Q1-1 Water Constituents After TreatmentValue (mg/litre (unless otherwise stated))65.5 NTU115 TCUParameterTurbidityColourManganese0.5BOD26.8Arsenic0.005Hardness560

I fallowing table contains the actual maximum values and compared with given values given as Remarks…

Answered: Drinking Water Quality (NS each of the…

Engineering

Civil Engineering

Drinking Water Quality (NS each of the parameter. Pro-

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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A 25 ml of sewage water sample was refluxed with 10 ml 0f 0.25 N K2Cr2O7 solution. The untreated dichromate requires 6.5 ml of 0.1 N FAS.10 ml of dichromate solution and 25 ml distilled water , under the same condition as sample required 27 ml of 0.1N FAS. Calculate the COD of sewage.
A 5-day BOD test if performed on an industrial wastewater sample that contains no bacteria; therefore, a "seeded" BOD test is run. Ten ml of "seed" are added to 20 liters of dilution water. Thirty milliliters of industrial wastewater are added to a 300-ml BOD bottle, and the remaining volume consists of "seeded" dilution water. The average dissolved-oxygen concentrations of the diluted wastewater samples and blanks (seeded dilution water) on the first day of the test were 7.5 mg/L and 9.0 mg/L, respectively. After incubation of separate BOD bottles at 20 C for 5 days, the average DO concentrations of the diluted wastewater BOD bottles and seeded dilution water BOD bottles were 3.1 and 8.5 mg/L, respectively. Calculate the 5-day BOD of the industrial wastewater. I am unsure of how to solve for f given this information, where f = (% seed in D1) / (% seed in B1)
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A wastewater sample was diluted 10% with tap water for conducting BOD Test. The DO content in wastewater sample was 1.2 mg/l and water was 6 mg/l. After 5 days incubation at 20°C, the DO of the sample was 0.5 mg/l. Calculate (1) 5 day BOD of wastewater and (ii) ultimate BOD. Assume K₂ = 0.12/day.
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