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0 m³/day. The used trickling filters shall have a diameter c of 2.4 m. (a) Find the number of filters in each stage so t of the first and second stages are not greater than 40mg/ =ctively. (b) Check the hydraulic and organic loading rates doto:

0 m³/day. The used trickling filters shall have a diameter c of 2.4 m. (a) Find the number of filters in each stage so t of the first and second stages are not greater than 40mg/ =ctively. (b) Check the hydraulic and organic loading rates doto:

Structural Analysis
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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Sanitary Engineering
A two-stage trickling filtration system treats sewage at an average flowrate of 36000 m³/day. The used trickling filters shall have a diameter of 25.1m and a depth of 2.4 m. (a) Find the number of filters in each stage so that the effluent BOD of the first and second stages are not greater than 40mg/L and 20mg/L, respectively. (b) Check the hydraulic and organic loading rates of the first and second stages. Use the following data: • The BOD of raw sewage is 250mg/l. • The percent of BOD removal in primary sedimentation unit is 31%. • The recirculated flowrate of the first stage is54000m³/day. • The recirculated flowrate of the second stage is 36000m³/day. The maximum allowed value of hydraulic loading rate is 40 m³ n³/m².day. • The maximum allowed value of organic loading rate is 2.4 kg BOD/m³.day. осно A
Transcribed Image Text:A two-stage trickling filtration system treats sewage at an average flowrate of 36000 m³/day. The used trickling filters shall have a diameter of 25.1m and a depth of 2.4 m. (a) Find the number of filters in each stage so that the effluent BOD of the first and second stages are not greater than 40mg/L and 20mg/L, respectively. (b) Check the hydraulic and organic loading rates of the first and second stages. Use the following data: • The BOD of raw sewage is 250mg/l. • The percent of BOD removal in primary sedimentation unit is 31%. • The recirculated flowrate of the first stage is54000m³/day. • The recirculated flowrate of the second stage is 36000m³/day. The maximum allowed value of hydraulic loading rate is 40 m³ n³/m².day. • The maximum allowed value of organic loading rate is 2.4 kg BOD/m³.day. осно A
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