Sanitary engineering Fig.2 shows a two-stage trickling filtration system that treats sewage at an averageflowrate of 30000 m³/day and influent BOD of 250 mg/L. The first and second stagesare composed of three and two filters, respectively, with the diameters andrecirculation flowrates shown in the figure. If each of the five filters has a depth of2.4 m, find the BOD of the final effluent (S.2).Q=30000 m³/dayS=250 mg/lQr=25000 m³/dayØ25mQr=25000 m³/dayØ25mQr=25000 m³/dayØ25m1st stage TFQr=20000 m³/day-020m.Qr-20000 m³/dayØ20m2 stage TFS₂₂-7 mg/

two stage trickling filterin first stage there are 3 filters and in second stage there is two…

Owrate of 30000 m³/day and influent BOD of 250 mg/L. The first and composed of three and two filters, respectively, with the diamete circulation flowrates shown in the figure. If each of the five filters has a d m, find the BOD of the final effluent (S.2).

Owrate of 30000 m³/day and influent BOD of 250 mg/L. The first and composed of three and two filters, respectively, with the diamete circulation flowrates shown in the figure. If each of the five filters has a d m, find the BOD of the final effluent (S.2).

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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Concept explainers

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

Sanitary engineering

Fig.2 shows a two-stage trickling filtration system that treats sewage at an average
flowrate of 30000 m³/day and influent BOD of 250 mg/L. The first and second stages
are composed of three and two filters, respectively, with the diameters and
recirculation flowrates shown in the figure. If each of the five filters has a depth of
2.4 m, find the BOD of the final effluent (S.2).
Q=30000 m³/day
S=250 mg/l
Qr=25000 m³/day
Ø25m
Qr=25000 m³/day
Ø25m
Qr=25000 m³/day
Ø25m
1st stage TF
Qr=20000 m³/day
-020m.
Qr-20000 m³/day
Ø20m
2 stage TF
S₂₂-7 mg/

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