As a process engineer, you are designing sedimentation tanks for a new drinking water treatment plant using a conventional treatment process. The design flow is 0.50 m³/s. The major target of the WTP is to remove Turbidity from water using alum as coagulant. The detention time = 4.5 hrs and number of sedimentation tanks, N=2. Q V = 0 A S Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Long rectangular and circular m³/dm² 40 30 20 70 57 V Q L = Vwater x 0 1 day = 86,400 s Application Alum or iron coagulation Turbidity removal Color removal High algae Lime softening Low magnesium High magnesium Source: AWWA. 1990. Upflow solids-contact m³/d. m² 50 35 130 105

As a process engineer, you are designing sedimentation tanks for a new drinking water treatment plant using a conventional treatment process. The design flow is 0.50 m³/s. The major target of the WTP is to remove Turbidity from water using alum as coagulant. The detention time = 4.5 hrs and number of sedimentation tanks, N=2. Q V = 0 A S Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Long rectangular and circular m³/dm² 40 30 20 70 57 V Q L = Vwater x 0 1 day = 86,400 s Application Alum or iron coagulation Turbidity removal Color removal High algae Lime softening Low magnesium High magnesium Source: AWWA. 1990. Upflow solids-contact m³/d. m² 50 35 130 105

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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You’re working on a preliminary design for a water treatment plant expansion for Fell City. The required capacity is 12 MGD (million gallons per day). The TSS of the sedimentation basin effluent is 16 mg/L of TSS. Assume the effluent TSS is 0 mg/L. (a) Based on a filtration rate of 2 gpm/ft2, how big (area) must the filters be? (b) If 3% of the treated water is used for backwashing, what would the backwash TSS be? (Set up a mass balance analysis.) (c) How many tons of sludge (dry solids) would be generated in 30 days? Answers: 4170 ft2, 533 mg/L, 24 ton
A smooth concrete pipe with a 1.5 ft diameter carries carbon tetrachloride at 20 C from a tank to a facility 1 mile away, where it discharges into the air. The pipe begins in the tank 3 feet below the surface and descends on a 1:100 (vertical: horizontal) slope. Determine the flow rate, assuming minor losses are negligible.
Consider a rectangular wastewater treatment pond having a length of 100 ft,width of 20 ft, and depth of 20 ft. Assume the discharge from a wastewater treatment plant has aflow of 30 MGD with a solids concentration of 5 mg/L.a) Determine the mass flow rate of solids discharged in ton per day?b) Calculate the residence time of the pond in minutes?
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1. A mixture consisting of 30 mL of waste and 270 mL of seeded dilution water has an initial Do of 8.55 mg/L; after 5 days, it has a final DO of 2.40 mg/L. Another bottle containing just the seeded dilution water has an initial DO of 8.75 mg/L and a final DO of 8.53 mg/L. Find the 5-days BOD of the waste.
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