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1. The design flow for a water treatment plant (WTP) is 1 MGD (3.8x103 m'/d). The...
Example 8: A 10 MGD (million gallons per day) surface water treatment plant proposes to use...
Example 8: A 10 MGD (million gallons per day) surface water treatment plant proposes to use alum coagulation for turbidity reduction using 45 mg/L alum! dosage. The raw water has an alkalinity of 20 mg/L as CaCo,. Commercial alum has the formula Al(SO2)2.144,0 (MW = 594). Determine the daily alum dosage required in kg/d. Z.6 -> EW - 99
A water treatment plant is to be designed to supply a daily flow of 35000 m/d....
A water treatment plant is to be designed to supply a daily flow of 35000 m/d. The raw water is taken from a local river that has a turbid water. The main treatment units of this treatment plant are as illustrated in Figure 1: Screen River Water > Sedimentation Coagulation Flocculation Filtration Adsorption Adsor prion > Disinfection Storage Distribution Figure 1: Water treatment plant main unit The design criteria of each treatment unit is as follows: 1. Coagulation tanks (Rapid...
A water treatment plant is processing water at a flow rate of 1.5 m/s using three parallel treatm...
A water treatment plant is processing water at a flow rate of 1.5 m/s using three parallel treatment trains. The detention times for the rapid mix tank, flocculation basin, and rectangular sedimentation basin are 10 sec, 30 min and 60 min, respectively. The velocity gradients for the rapid mix and flocculation tanks are 900 s and 60:40:20 s1, respectively. The viscosity of water is 0.001 Pa-s. (a) Determine the size and power requirements for rapid mix tanks. (b) Determine the...
1. A square rapid mixing basin, with a depth of water (i.e., basin's depth) equal to...
1. A square rapid mixing basin, with a depth of water (i.e., basin's depth) equal to 1.25 times the width, is to be designed for a flow of 2 million gallons per day. G is 790 per second; detention time is 40 second; operating temperature is 10 °C. Determine the following: Basin dimensions Horsepower required (mixer is 100% efficient) • 2. A rapid mix tank, equipped with a mechanical mixer, will be used to mix the coagulant into water at...
A water treatment plant (10 MGD) uses 50 kg/d of chlorine. The residual chlorine after 30...
A water treatment plant (10 MGD) uses 50 kg/d of chlorine. The residual chlorine after 30 minutes contact time is 0.55 mg/L. Find the chlorine dosage and chlorine demand of the water.
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...
4. (20 pts) A rapid mixing basin is designed to process 3.0 MGD of water. The...
4. (20 pts) A rapid mixing basin is designed to process 3.0 MGD of water. The basins will be square, and the depth is assumed to be 1.times of the width. Use a detention time of 30 s and velocity gradient of 750 s'. Two basins will be constructed each having a capacity to process exactly half the entire water flow. Determine: (a) Dimensions of the basin (L, W and H) (b) Power input (hp) (c) Rotational speed (rpm) of...
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...
You have been assigned the job of designing a rapid mix tank for a new water...
You have been assigned the job of designing a rapid mix tank for a new water treatment plant. The design flow rate is 1.0 m3/sec. The average water temperature is 10 oC. The following design assumptions have been made: 1. Number of tanks = 1 (with 1 backup) 2. Tank configuration: Circular with liquid depth of 1.0m. 3. Detention time = 40 sec. 4. Velocity gradient = 750 s-1 Design the rapid mix by providing the following: a) Water power...
Ex. 4 A water treatment plant with a maximum daily flow of 3 m/s (1.5 times...
Ex. 4 A water treatment plant with a maximum daily flow of 3 m/s (1.5 times the average flow) is treating a surface water. The water is coagulated with alum and the alum floc was measured to have a settling velocity of 2.2 m/h at 10 °C. Design a horizontal-flow rectangular sedimentation system based on the maximum day flowrate. Include the number of basins, dimensions and criteria checks.
Example 8: A 10 MGD (million gallons per day) surface water treatment plant proposes to use alum coagulation for turbidity reduction using 45 mg/L alum! dosage. The raw water has an alkalinity of 20 mg/L as CaCo,. Commercial alum has the formula Al(SO2)2.144,0 (MW = 594). Determine the daily alum dosage required in kg/d. Z.6 -> EW - 99
A water treatment plant is to be designed to supply a daily flow of 35000 m/d. The raw water is taken from a local river that has a turbid water. The main treatment units of this treatment plant are as illustrated in Figure 1: Screen River Water > Sedimentation Coagulation Flocculation Filtration Adsorption Adsor prion > Disinfection Storage Distribution Figure 1: Water treatment plant main unit The design criteria of each treatment unit is as follows: 1. Coagulation tanks (Rapid...
A water treatment plant is processing water at a flow rate of 1.5 m/s using three parallel treatment trains. The detention times for the rapid mix tank, flocculation basin, and rectangular sedimentation basin are 10 sec, 30 min and 60 min, respectively. The velocity gradients for the rapid mix and flocculation tanks are 900 s and 60:40:20 s1, respectively. The viscosity of water is 0.001 Pa-s. (a) Determine the size and power requirements for rapid mix tanks. (b) Determine the...
1. A square rapid mixing basin, with a depth of water (i.e., basin's depth) equal to 1.25 times the width, is to be designed for a flow of 2 million gallons per day. G is 790 per second; detention time is 40 second; operating temperature is 10 °C. Determine the following: Basin dimensions Horsepower required (mixer is 100% efficient) • 2. A rapid mix tank, equipped with a mechanical mixer, will be used to mix the coagulant into water at...
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...
4. (20 pts) A rapid mixing basin is designed to process 3.0 MGD of water. The basins will be square, and the depth is assumed to be 1.times of the width. Use a detention time of 30 s and velocity gradient of 750 s'. Two basins will be constructed each having a capacity to process exactly half the entire water flow. Determine: (a) Dimensions of the basin (L, W and H) (b) Power input (hp) (c) Rotational speed (rpm) of...
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...
Ex. 4 A water treatment plant with a maximum daily flow of 3 m/s (1.5 times the average flow) is treating a surface water. The water is coagulated with alum and the alum floc was measured to have a settling velocity of 2.2 m/h at 10 °C. Design a horizontal-flow rectangular sedimentation system based on the maximum day flowrate. Include the number of basins, dimensions and criteria checks.
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