6. After your flash mix the water was sent to a clarification basin that was 24 feet in diameter and 20 feet tall. What was the detention time in hours of 0.43 MGD? 5.4 hours 4.3 hours 3.8 hours 2.3 hours After the water leaves your sedimentation basin, it is ready for filtration. Your two filters measure 10 feet in diameter. What is the filtration rate is gpm for your flow of 0.43 MGD? 19 gpm/sq/ft 29 gpm/sq/ft 39 gpm/sq/ft 49 gpm/sq/ft You have had a filtration breakthrough (failure) and have brought your old roughing filtration system on line. The old filter is 8 feet square and 4 feet deep. What is the filtration rate in gpm/sq/ft for your flow of 0.43 MGD? 10.33 gpm/sq/ft 8.55 gpm/sq/ft 5.99 gpm/sq/ft 4.66 gpm/sq/ft

6. After your flash mix the water was sent to a clarification basin that was 24 feet in diameter and 20 feet tall. What was the detention time in hours of 0.43 MGD? 5.4 hours 4.3 hours 3.8 hours 2.3 hours After the water leaves your sedimentation basin, it is ready for filtration. Your two filters measure 10 feet in diameter. What is the filtration rate is gpm for your flow of 0.43 MGD? 19 gpm/sq/ft 29 gpm/sq/ft 39 gpm/sq/ft 49 gpm/sq/ft You have had a filtration breakthrough (failure) and have brought your old roughing filtration system on line. The old filter is 8 feet square and 4 feet deep. What is the filtration rate in gpm/sq/ft for your flow of 0.43 MGD? 10.33 gpm/sq/ft 8.55 gpm/sq/ft 5.99 gpm/sq/ft 4.66 gpm/sq/ft

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 raw sewage sample was brought in for total suspended solids and volatile solids analysis. A portion of the sample was poured into a tared evaporating dish and weighed. The sample was then heated at 105°C for 4 hours, weighed, heated at 550°C overnight, and weighed again. The data are as follows: • Tare wt. 42.9073g• Wt of sample 104.4680g• 105 °C wt. 45.4140g• 550 °C wt. 43.3236g What is the TSS in g/L? What percent of the solids are volatile?
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Problem 1. A wastewater sample is examined for its solid contents. The ionic strength (μ) of wastewater is 0.01. It is known that 30% of total dissolved solids (TDS) is organic. The volumetric settleable solid concentration is determined as 20 mL/L using Imhoff Cone. It is assumed that 40% of total suspended solids (TSS) is equal to dry-settleable solids. The volumetric settleable solids composes of 2% of dried solids and 98% of water. The density of volumetric settleable solid concentration is given as 1020 g/L. Use information given in problem, calculate: a) Total Dissolved Solids (TDS) concentration as mg/L. b) Total Suspended Solids (TSS) concentration as mg/L. c) Total Solids (TS) concentration as mg/L.
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T Settled sludge and filter wash water from water treatment are thickened in Problems 703 clarifier-thickeners prior to mechanical dewatering. The settled sludge volume is 1150 gpd with 1.0% solids, and the backwash is 9800 gpd containing 500 mg/l of suspended solids. Calculate the daily quantity of thickened sludge, assuming a concentration of 3.0% solids
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3. A 100 mL of wastewater sample was drying on a 0.5 g empty dish weight at 104 °C to weight 0.5625 g. Another 100 mL of the same wastewater was first filtered and the filtrate was dried on a 0.5 g dish at 104 °C to weight 0.5325 g. Determine in mg/L the:a) TSb) TSSc) TDSd) VSS assuming it represents 70% of TSS
A sand bed filter is 50 ft in diameter and filled to a depth of 20 ft with sand. The sand particle diameter is 1 mm and the initial bed void fraction is .34. Wastewater containing 1% by volume suspended solids is fed to the filter at a rate of 4500 gpm by a positive displacement pump which can delvier this rate up to a discharge pressure of 45 psig. Determine how long in hours the filtration system can operate before shutting down for backwashing.
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Wastewater Engineering civil engineering (2)
Water treatment plant : SOR = 0.35 mm/sec; The analysis of this water found that there are 6 different particle sizes: 0.1 mm with settling velocity of 0.2 mm/sec; and percentage of particles = 10 %; 0.2 mm with settling velocity of 0.25 mm/sec; and percentage of particles = 20 %; 0.3 mm with settling velocity of 0.3 mm/sec; and percentage of particles = 15 %; 0.4 mm with settling velocity of 0.35 mm/sec; and percentage of particles = 5 %; 0.5 mm with settling velocity of 0.4 mm/sec; and percentage of particles = 30 %; 0.6 mm with settling velocity of 0.5 mm/sec; and percentage of particles = 20 %; Calculate the efficiency of this tank ?
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