Question- A water treatment plant of capacity, 1 m³/s has filter boxes of dimensions 6 m × 10 m. Loading rate to the filters is 120 m³/day/m². When two of the filters are out of service for back washing, the loading rate (in m³/day/m²) is

Question- A water treatment plant of capacity, 1 m³/s has filter boxes of dimensions 6 m × 10 m. Loading rate to the filters is 120 m³/day/m². When two of the filters are out of service for back washing, the loading rate (in m³/day/m²) is

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Q- A water treatment plant of capacity, 2 m³/s has filter boxes of dimensions 6 m x 10 m. Loading rate to the filters is 100 m³/day/m². When two of the filters are out of service for back washing, Find the loading rate (in m³/day/m²).
Problem: 1. Design a facultative pond to treat (13500)gpm of sewage having (13500/20)mg/L of BOD. The average summer and winter temperature is 43oC and 13oC, respectively. Convert the same pond into aerated lagoon, if the concentration of influent BOD reaches to (13500)mg/L. 2. Determine the diameter of a trickling filter for a wastewater flowing at the rate of (13500)m3/day. The influent BOD (So) concentration for the wastewater is (13500 * 10)mg/L, whereas desirable effluent BOD should be as per NEQS.
Solve the points in the hand
2. A lake has a volume of 9 million m³ and an average depth of 3 m. There is an influent stream coming in to the lake with a flow rate of 20 m³/s and an ammonia concentration of 1 mg/L. Also, there is a wastewater outfall coming into the lake with a flow rate of 1 m³/s and an ammonia concentration of 180 mg/L. There is an effluent stream leaving the lake. The ammonia in the lake has a decay rate of 0.18/d. a. Draw a schematic diagram showing different inflows and outflows from the control volume. Indicate the values of different variables in the diagram. b. What is the steady-state concentration of ammonia in the lake?
A municipal wastewater flow of 1,000 m³/d contains 400 mg/L BOD5 and is treated to be in a trickling filter. The filter will use a plastic filter medium with a specific surface area of 200 m³/m² and will operate with a recirculation ratio of 100% and a hydraulic loading of 25 m³/m² -d. Based on a typical volumetric loading of 0.6 kg BOD5/m³-d, what volume (m³) of plastic media would be required?
Q avg = 0.181 m^3/s
Dr. Example 7: A water plant treating 30000 m³/day. The rapid mixing is used tank blend 35 mg/L of alum with the flow and is to have a detention time of 2 min. The tank is to have a square cross-section with vertical shaft and a flat blade impeller. Determine the following: 1- Quantity of alum added (Kg/day) 2- Dimensions of tank by using upper limits of specifications.
Determine the dimensions of a high rate trickling filter for the following data: (ii) Recirculation ratio = 1.5 (iv) BOD removed in primary tank = 25%. (i) Sewage flow = 3.0 MLD (iii) BOD of raw sewage = 250 mg/L (v) Final effluent BOD desired = 30 mg/L By what % the diameter of the filter will have to be modified if it is to be designed as a standard rate trickling filter for the above requirement.
Hello Would you please solve this question. I got the results but it is incorrect 466.8 m^3, 20,000 m^3, 64,000 m^3 all are incorrect.
An existing single-stage rock trickling filter treats a wastewater flow of 3785 m/d ("raw" influent BOD, = 240 mg/L), but it cannot meet the effluent limitation of 30 mg/L BODS. The actual effluent concentration is 65 mg/L. The existing system is operated without recycling. i) Design this biological treatment system by estimation of the volume of the existing rock trickling filter in m. ii) To reduce the effluent BOD, to 30 mg/L, an engineering firm proposed the addition of a second – stage tricking filter (the same dimension as the first-stage). Is this going to work? (show your calculation). ili) If the proposed two-stage system was operated with a recirculation (Q, = Q) in both filters, what will be the effluent BODS in mg/L from the two-stage system? 100 100 E, E, = - 0.532 W W. 1+0.532, 1+ 1-E, V,F,
Hello Would you please solve this question. I got the results but it is incorrect , 20,000 m^3, 10,000 m^3, 0.05 m^3 all are incorrect.