3.Following information obtained from the Cooper's Town waterreservoir. To complete a 100,000 m³/d water treatment facility design,CationCa2+Conc. (mg/L)AnionConc. (mg/L)121.3HCO3254Mg2+36.2SO42-186Na+8.1CI48K+12NO3pH19.17.3a) Construct a line diagram based on reactivity of the ion species. b) Estimatethe scaling potential of sample using Langelier Index. c) Determine TotalAlkalinity, Total Hardness, Carbonate Hardness and Non-Carbonate Hardness(mg/L as CaCO3). d) Determine the theoretical amount of lime and soda (kg/d)for removing hardness by chemical precipitation without any amount in excess.ka2 = 4.17*10-11, kca = 5.25*10-⁹, and neglect the ionic strength.(Reactivity of ion species: Ca2+>Mg2+>Na+>K+, HCO3>SO4²->CI>NO3¯)

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Answered: 3. Following information obtained from…

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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6.7 Overall design of a municipal water treatment plant The following treatment processes are commonly used in municipal drinking water treatment: Coagulant addition-flocculation tank Deep-bed sand filter • Disinfectant addition-contact basin • Granular activated carbon sorption unit • Sedimentation basin (a) State the purpose and means of functioning of each unit. (b) If each of these processes were to be used in a single treatment plant, specify the order in which they would be applied. Justify your answer.
CIVIL ENGINEERING (ii) A treatment plant disposes 50 MLD of treated effluent into a river. The river flow rate is 20 m³/s and its DO is 8 mg/L before the mixing point. If the BOD of the effluent is 50 mg/L, find the BOD and DO of the river water at the d/s of mixing point. Assume BOD of river water as 0 and DO in WW effluent as 0.
3. Consider the design of a wastewater treatment plant (WWTP) for a community with the following design data: TABLE 1: Design Data Design data Flow-0.150m³. s-¹ Influent suspended solids-280mg L-¹ Influent BODs = 500mg L-¹ -1 Sludge concentration= 6.0% Efficiency= 60% Effective length= 40.0 m Width = 10.0 m Liquid depth = 2.0 m Weir length= 75.0 m Table 2: Acceptability Criteria Parameter Detention time (hours) Overflow rate (m- day) Weir loading (m³-day m¹') Acceptable range 1.5-2.5 80-120 <250 (c) Assume that the primary sedimentation process in this treatment facility removes 60% of the suspended solids (SS) and 40% of the BODs of the raw sewage. Determine the SS and BOD5 concentrations in the primary sedimentation effluent flow.
1.) These re process in a water treatment plant except: a. Collection of water from watershed b. Coagulation c. filtration d. sedimentation 2.) Which of the following is the fastest way by which you can get safe drinking water? a. Boiling b. Collecting rainwater c. forest d. watershed and dam 3.) Which of the following does NOT help collect and or store water? a. Aquifer b. Concrete roads and parking lots c. forest d. watershed and dam
An ion exchanger treats 1 MLD of water using an exchanger of capacity 100 kg/day/m3 with rate of flow being 0.5 m3/min/m2. Choose the correct statements assuming total hardness of water equal to 84 mg/1 as Cao. Total hardness of water is equal to 150 mg/l as CaCO3. Correct Option B Sodium Alumino - Silicates may be used as ion-exchanger. Correct Option lon exchanger can result in removing complete hardness. Correct Option Correct Option The height of ion exchanger required is 1.08 m if hardness of water is taken as 150 mg/1 as CacO3.
QUESTION: An aerated lagoon wastewater treatment is to be designed for a municipal wastewater. The design population is 5000 persons, and the aerated lagoon is to provide secondary treatment. Pertinent data are: flow = 380 L/cap-d, influent BOD5 = 255 mg/L; effluent BOD5 = 20 mg/L, K = 2.18 d-1 oxygen required 1.6 kg O2/kg BOD5 applied to the lagoons, and the primary clarifier removes 33 % of the influent BOD5. Calculate the total lagoon volume (m3)
1. A natural water with a flow of 4.0 MGD is to be treated with a commercial-grade alum dosage of 80 mg/l. Determine the amount of alum required (expressed in lbs/day), the amount of natural alkalinity required to complete the reaction (expressed in mg/l as CaCO3 and kg/day), and the amount of Al(OH)3(s) sludge produced (expressed in lbs/day and gal/day) if the sludge contains 2.2% solids by weight and the S.G. of the dry solids is 2.0.
A municipal wastewater treatment plant discharges a maximum flow rate of (5 m³/S), a BOD, @ 20 °C of (55 mg/L), a dissolved oxygen concentration of (2.0 mg/L), and temperature of (25.5 °C). The stream (upstream from the point of wastewater discharge) is found to have a minimum flow rate of ( 22 m/s), a BOD, @20 °C of (3.0 mg/L), a dissolved oxygen concentration of (7.0 mg/L), and temperature of (25.5 °C). Complete mixing of the wastewater and stream is almost instantaneous and the velocity of the mixture is (0.18 m/s) From the flow regime, the reaeration constant rate is estimated to be (0.3 d') at (20 °C) and the reaction constant rate is estimated to be (0.15 d') at (20 °C) Sketch the dissolved oxygen sag curve a (100-km) (D20.40.80.100) reach of the stream below the discharge? Temperature (°C 20 21 D. O (mg/L) 9.17 8.9 Temperature (°C) 22 23 D.O (mg/L) 8.7 8.6
The BOD just downstream from a wastewater pipe is 12.9 mg/L and the DO (dissolved oxygen) is 8.6 mg/L. The saturated value of dissolved oxygen is 9.6 mg/L, the deoxygenation constant (kd) is 0.21/day, the reaeration constant (kr) is 0.42. Find the time where oxygen deficit is at a maximum and find the minimum value of DO.
A groundwater supply has been designated as vulnerable to fecal contamination, and the state has specified a disinfection level of 99.99% (4.0-log) virus inactivation. The peak hourly pumping rate is 2000 gpm from the well field through a 4200-ft pipe with a 16-in diameter to a reservoir in the town. The water temperature is 10°C. A. what is the contact time in the pipeline? B. What chlorine residual is required in the water at the outlet of the pipeline? F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 %23 & 3 4 7 8 T Y D F G K CO LLI
A new water treatment plant is going to be constructed in Jacksonville to replacethe existing plant. The average annual water temperature is 19 oC. The following designassumptions for a flocculation tank have been made:Number of tanks = 1Detention time = 40 minVelocity gradient = 25 s−1Impeller type: radial, 3 flat blades, Np = 0.33Impeller diameter = 1.1 mRotational speed = 30 rpmWhat is the design flow rate in m3/d?
The wastewater from a synthetic textile manufacturing plant is discharged to a municipal treatment plant for processing with domestic wastewater. The characteristics of the synthetic textile wastewater are 1500 mg/L BOD, 2000 mg/L SS, 30 mg/L nitrogen, and no phosphorus. The characteristics of the domestic wastewater are 200 mg/L BOD, 240 mg/L SS, 35 mg/L nitrogen, and 7 mg/L phosphorus. Find the BOD, SS of the mixture. The ratio of flow rate is domestic/textile = 4/1

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