**Question:**Based on the typical sedimentation tank overflow rate for the above problem, the water depth, H, is _____________, in m.**Options:**1. 6.52. 4.53. 5.54. 7.55. 3.5---**Explanation of Content:**This multiple-choice question is designed to test your knowledge of sedimentation tank design, specifically focusing on determining the appropriate water depth, H, given typical overflow rates. The correct depth needs to be deduced from the provided options, applying the principles of sedimentation theory and tank design. This concept is crucial for understanding how to efficiently and effectively plan for sedimentation in water treatment facilities. ### Designing Sedimentation Tanks for a Water Treatment Plant**Objective:**As a process engineer, you are tasked with designing sedimentation tanks for a new drinking water treatment plant (WTP) using a conventional treatment process. The main goal of the WTP is to remove turbidity from the water using alum as a coagulant.**Specifications:**- Design flow rate (\(Q\)): 0.50 m³/s- Detention time (Θ): 4.5 hours- Number of sedimentation tanks (N): 2**Formulas and Parameters:**1. **Overflow Rate (\(V_o\))**: The overflow rate is calculated using the formula: \[ V_o = \frac{Q}{A_s} \] where \(A_s\) is the surface area of the sedimentation tank.2. **Detention Time (Θ)**: The detention time relation is given by: \[ Θ = \frac{V}{Q} \] where \(V\) is the volume of water.3. **Water Volume (\(L\))**: The volume of water can be calculated as: \[ L = V_{water} \times Θ \] Note: 1 day = 86,400 seconds**Graph and Detailed Explanation:**The table below summarizes the performance of various applications for different tank configurations:| Application | Long rectangular and circular (m³/d⋅m²) | Upflow solids-contact (m³/d⋅m²) ||----------------------------|----------------------------------------|----------------------------------|| **Alum or iron coagulation** | | || Turbidity removal | 40 | 50 || Color removal | 30 | 35 || High algae | 20 | 30 || **Lime softening** | | || Low magnesium | 70 | 130 || High magnesium | 57 | 105 |**Source:** AWWA, 1990.This table provides a quick reference for understanding the efficiency and appropriateness of different tank designs (long rectangular/circular vs. upflow solids-contact) under various treatment applications. It is essential for optimizing the design parameters to meet specific water treatment goals.

Surface area is given by A A = QVo Where ; Q = discharge per tank = 0.5 / 2 = 0.25 m3 /s Vo = From…

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 V Ө Q L = Vwater x 0 1 day = 86,400 s Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Long rectangular and circular m³/d. m² 40 30 20 70 57 = 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 V Ө Q L = Vwater x 0 1 day = 86,400 s Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Long rectangular and circular m³/d. m² 40 30 20 70 57 = 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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