The total flow entering a wastewater treatment plant is constant at 9,000 m^3/day. The flow is evenly split between Three biological reactors that are installed in parallel. Each of the reactors hasd a volume of 750,000 L. What is the hydraulic retention time (in hours) of each reactor?
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The total flow entering a wastewater treatment plant is constant
at 9,000 m^3/day. The flow is...
A drinking water treatment plant is designed with three sedimentation basins in parallel. Each basin is...
A drinking water treatment plant is designed with three sedimentation basins in parallel. Each basin is designed with an overflow rate of 1,200 gpd/ft2 (gallons per day per square foot). (“In parallel” means that the flow is split evenly between the basins as shown below.) A. If the plant flow is 20 mgd (million gallons per day), find the plan area of each basin in square feet. B. Calculate the dimensions of the basins (length and width in feet) if...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant in the raw waste is 850 mg/L with first-order reaction rate constant of 2.5/day. The industry splits the flow into three parallel continuous stirred tank reactors at 0.25 m/day to reactor one, 0.3 m/day to reactor two and the remaining 0.17 m®/day to reactor three. If each reactor must achieve removal efficiency of 90%, what is the required detention time and the volume for...
Water and Wastewater Treatment SP-WATER TREATMENT PLANT SEDIMENTATION BASIN Design a rectangular, horizontal flow sedimentation process...
Water and Wastewater Treatment
SP-WATER TREATMENT PLANT SEDIMENTATION BASIN Design a rectangular, horizontal flow sedimentation process for a water treatment plant for turbidity removal Design Maximum Day Flow-20,000 m2ld Two parallel sedimentation tank, each designed for half of the total flow Depth 4.5 m, Width 6 m, Surface Overflow Rate 50 m/day Chain and flight sludge collector will be used, hence the limiting width of 6 m. Minimum Hydraulic Retention Time (detention time) 2 hrs Maximum weir rate 250 m/day/m...
Just tell me which one is right? A wastewater treatment plant treats 1000 m3 day- of...
Just tell me which one is right?
A wastewater treatment plant treats 1000 m3 day- of wastewater. Calculate the effective volume of aeration tank of this plant, based on the following information: - Influent BOD5 concentration=200 mg L-1 - MLSS: 2000 mg L-? - HRT=5 hours Volume (m3): 208 308 408 500 1,080 A wastewater treatment plant treats 1000 m
A wastewater treatment plant discharges hot water (310K) to a river. The flow rate of the...
A wastewater treatment plant discharges hot water (310K) to a river. The flow rate of the river is 4×1010 L/day. Upon mixing, the hot water is cooled to 290K and the river water is heated from 288K to 290K. If 20% of the heat from the wastewater treatment plant effluent is radiated to the atmosphere, what is the wastewater treatment plant discharge rate (L/day)?
1. The total flow at a wastewater-treatment plant is on average 600 m' /day with a...
1. The total flow at a wastewater-treatment plant is on average 600 m' /day with a standard deviation of 45 m /day and behaves in accordance with a normal distribution. (a) With what probability would the flow on any given day exceed 680 m /day? (b) We can expect to see 90% of the days exhibit a flow above what value? (c) Suppose we wish to test whether the flow mean has changed based on the average taken over 9...
Secondary Treatment Based on a plant flow rate of 40 mgd, design an activated sludge, secondary t...
Secondary Treatment Based on a plant flow rate of 40 mgd, design an activated sludge, secondary treatment system with recycle which maintains a MLVSS = 2,000 mg/L in the aeration reactor and has an average Solids Retention Time (SRT)-4 days. The biota kinetic constants are Kinetic Coefficients for the Activated-sludge Process for the Removal of Organic Matter from Domestic Wastewater Endogenous Decay Coefficient- k(d) 0.1 Half-velocity constant- K(s VSS/qVss-da 15 Mg/L bsCOD Max. Specific Substrate Utilization Rate-k 6 G bsCOD/gVSS-da...
A wastewater treatment plant receives an average of 4.5 MGD of wastewater flow. Two rectangular primary...
A wastewater treatment plant receives an average of 4.5 MGD of wastewater flow. Two rectangular primary clarifiers operating in parallel will treat the flow. If the overflow rate is 700 gpd/ft2 and the depth of the clarifier is 10 ft, Determine: a) the dimensions of each clarifier assuming L:W ratio = 5:1. b) the detention time of each clarifier (in days).
An oil company produces a wastewater and would develop an integrated Unit for the biological treatment....
An oil company produces a wastewater and would develop an integrated Unit for the biological treatment. You are assigned to overview this project with some engineers available to construct all the steps of the process. The characteristics of the wastewater are the following: Total COD = 35 kg/m3 Soluble COD= 22 kg/m3 Total suspended solids and oil = 18.7 kg/m3 The pre-treated wastewater after the separation of suspended sis characterized by a BOD of 21.5 kg/m3. The engineer obtained 87%...
9.9 Design an aerated grit chamber system to treat a 1-day sustained peak hourly flow of...
9.9 Design an aerated grit chamber system to treat a 1-day sustained peak hourly flow of 1.6 m/s with an average flow of 0.65 m/s. See Table 9.4 for design guidance. Determine: a. The grit chamber volume (assuming two chambers will be used) b. The dimensions of the two grit chambers. c. The average hydraulic retention time in each grit chamber. d. Air requirements, assuming 0.20 m of air per m length of tank per minute. e. The quantity of...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant in the raw waste is 850 mg/L with first-order reaction rate constant of 2.5/day. The industry splits the flow into three parallel continuous stirred tank reactors at 0.25 m/day to reactor one, 0.3 m/day to reactor two and the remaining 0.17 m®/day to reactor three. If each reactor must achieve removal efficiency of 90%, what is the required detention time and the volume for...
Water and Wastewater Treatment
SP-WATER TREATMENT PLANT SEDIMENTATION BASIN Design a rectangular, horizontal flow sedimentation process for a water treatment plant for turbidity removal Design Maximum Day Flow-20,000 m2ld Two parallel sedimentation tank, each designed for half of the total flow Depth 4.5 m, Width 6 m, Surface Overflow Rate 50 m/day Chain and flight sludge collector will be used, hence the limiting width of 6 m. Minimum Hydraulic Retention Time (detention time) 2 hrs Maximum weir rate 250 m/day/m...
Just tell me which one is right?
A wastewater treatment plant treats 1000 m3 day- of wastewater. Calculate the effective volume of aeration tank of this plant, based on the following information: - Influent BOD5 concentration=200 mg L-1 - MLSS: 2000 mg L-? - HRT=5 hours Volume (m3): 208 308 408 500 1,080 A wastewater treatment plant treats 1000 m
1. The total flow at a wastewater-treatment plant is on average 600 m' /day with a standard deviation of 45 m /day and behaves in accordance with a normal distribution. (a) With what probability would the flow on any given day exceed 680 m /day? (b) We can expect to see 90% of the days exhibit a flow above what value? (c) Suppose we wish to test whether the flow mean has changed based on the average taken over 9...
Secondary Treatment Based on a plant flow rate of 40 mgd, design an activated sludge, secondary treatment system with recycle which maintains a MLVSS = 2,000 mg/L in the aeration reactor and has an average Solids Retention Time (SRT)-4 days. The biota kinetic constants are Kinetic Coefficients for the Activated-sludge Process for the Removal of Organic Matter from Domestic Wastewater Endogenous Decay Coefficient- k(d) 0.1 Half-velocity constant- K(s VSS/qVss-da 15 Mg/L bsCOD Max. Specific Substrate Utilization Rate-k 6 G bsCOD/gVSS-da...
A wastewater treatment plant receives an average of 4.5 MGD of wastewater flow. Two rectangular primary clarifiers operating in parallel will treat the flow. If the overflow rate is 700 gpd/ft2 and the depth of the clarifier is 10 ft, Determine: a) the dimensions of each clarifier assuming L:W ratio = 5:1. b) the detention time of each clarifier (in days).
9.9 Design an aerated grit chamber system to treat a 1-day sustained peak hourly flow of 1.6 m/s with an average flow of 0.65 m/s. See Table 9.4 for design guidance. Determine: a. The grit chamber volume (assuming two chambers will be used) b. The dimensions of the two grit chambers. c. The average hydraulic retention time in each grit chamber. d. Air requirements, assuming 0.20 m of air per m length of tank per minute. e. The quantity of...
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