EXAMPLE 7.4 SI Aerated Grit Chamber A municipal wastewater treatment plant has an average flow of 0.473 m/s. and two aerated grit chambers, are to be designed. Dual units are to be provided for flexibility in operation, since one could be used should the other require temporary maintenance. During normal operation, both cham- bers would be used. Each chamber is to be a rectangular tank with spiral- roll flow. The peak flow is 2.29 times the average flow. The tank width is 1.5 times the depth, and the length is 4.0 times the width. Determine: 1. The theoretical dimensions of the tanks, in meters, if the detention time is 3 min. 2. The total air flow in m/min, if 0.3 m/min per meter of tank length is to be provided.

EXAMPLE 7.4 SI Aerated Grit Chamber A municipal wastewater treatment plant has an average flow of 0.473 m/s. and two aerated grit chambers, are to be designed. Dual units are to be provided for flexibility in operation, since one could be used should the other require temporary maintenance. During normal operation, both cham- bers would be used. Each chamber is to be a rectangular tank with spiral- roll flow. The peak flow is 2.29 times the average flow. The tank width is 1.5 times the depth, and the length is 4.0 times the width. Determine: 1. The theoretical dimensions of the tanks, in meters, if the detention time is 3 min. 2. The total air flow in m/min, if 0.3 m/min per meter of tank length is to be provided.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Q4-A) Design a Grit chamber for the following condition: ( 2max=4000 m³/day Qavg= 1500 m³/day ,Qmin 0.3 Qavg.,The horizontal velocity is to be 250 mm/sec and naximum depth of flow is 0.5 m,Grit load = 0.05 m²/1000 m³ sewage Q4-B) Answer only one: خورد 1) Parameters effected on the optimal dose of chlorine? 2) Explain with sketch the processes and method of wastewater treatment.
Use Thoma's method. Kindly give me right solution with step by step clearly.
An aluminum alloy pipe with an outside diameter of 4.9 in. and a wall thickness of 2/16 in. cantilevers upward a distance of L = 21 ft. The pipe is subjected to a wind loading that increases from WA = 12 lb/ft at its base to we = 18 lb/ft at its tip. (a) Compute the maximum value of Q for the pipe. (b) What is the maximum vertical shear stress in the pipe? WB WA B L
1
answer the four bits given in image. please solive them.
QI:- Design a settling tank for a flow of 0.2 MGD if the overflow rate is not to exceed 600 gpd/n. Calculate dimensions if the tank is circular with a depth of 12 ft. Calculate dimensions if the tank is rectangular with a depth of 10 fit and a length to width ratio of 4 to 1 Q2:- The settling velocity of alum floc is approximately 0.0014 f/s in water at 10 C. Calculate the cquivalent overflow rate in gpd/f12. What is the minimum detention time in hours to settle out alum floc in an ideal basin with a depth of 10 ft? Q3:- Two rectangular clarifiers, cach 30 ft long, 15 ft wide, settle 0.40 MGD following alum coagulation. The effluent channels have a total weir length of 60 ft. Calculate the detention time, horizontal velocity, rate of flow over the outlet weir. Do these values meet the GLUMRB Standards for water works? Q4:- Calculate the diameter and depth of a circular sedimentation basin for a design flow of 3800 m3/d based on an overflow rate of 0.00024 m's and a detention time of 3…
Paz: (A) On testing the water Contet for asoil Sample, we have got the followsng dato , wz = lo 8.7 gm pa. ou ノW2 WI : 58.7 9m l05.1 er. r. w3= gm en
Solve early
Please use your hands
The design flow for a water treatment plant (WTP) is 4000 m3/d, the rapid mixing tank will have a mechanical mixer and the average alum dosage will be 50 mg/l. The theoretical mean hydraulic detention time of the tank will be 60 second and the depth is 1.4 m. Design a circular rapid mixing tank and determine the quantity of alum needed.
The results of a water analysis for Sungai Buaya is shown below: = 2.5 meq/L Mg²* = 0.6 meq/L Na* 1.7 meq/L SO? = 2.0 meq/L 0.2 meq/L Ca²+ HCO; %3D 2+7 = 0.4 meq/L = 0.4 meq/L Cl K+ (i) Calculate the concentration for each cation and anion component in mg/L (ii) Draw a miliequivalent per litre bar graph (iii) List the hypothetical combinations with values (iv) Calculate the non-carbonate hardness in mg/L as CaCO3
Two wastewater streams A and B, having an identical ultimate BOD are getting mixed to form the stream C. The temperature of the stream A is 20 °C and the temperature of the stream C is 10 °C. It is given that • The 5-day BOD of the stream A measured at 20 °C=50 mg/l • BOD rate constant (base 10) at 20 °C-0.115 per day Temperature coefficient = 1.135 The 5-day BOD (in mg/l, up to one decimal place) of the stream C, calculated at 10 °C, is ●