Suppose you are to measure the BOD (biochemical oxygen demand) removal rate for a primary wastewater treatment plant. You take two samples of raw sewage on its way into the plant and two samples of the effluent leaving the plant. Standard five day BOD tests are run on the four samples with no seeding, producing the following data (See Figure attached) Find BOD5 for the raw and treated sewage, and the percent removal of BOD in the treatment plant. Find the DO (dissolved oxygen) that would be expected in sample two at the end of the test.What would be the maximum volume of treated sewage for Sample 4 that could be put into the 300-mL BOD bottle and still have the DO after five days remain above 2 mg/L? nitrifica(a) What is the five-day BOD of the wastewater?(b)AssumingWhat would be the remaining BOD after five days have elapsed?(d) Estimate the reaction rate constant k (day-¹).Suppose you are to measure the BOD removal rate for a primary wastewater treatmentplant. You take two samples of raw sewage on its way into the plant and two samples ofthe effluent leaving the plant. Standard five-day BOD tests are run on the four samples,with no seeding, producing the following data:Sample1234no nitrification effects, estimate the ultimate carbonaceous BOD.SourceRawRawBeing measured is carbonaceous.TreatedTreatedDilution1:301:151:20?ping. AssumeDO;(mg/L)9.29.29.09.0DO (mg/L)2.2?2.0>0

From the given data,now calculating for the treated sewage is,Substitute all the values, we get…

Answered: Suppose you are to measure the BOD…

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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Suppose you are to measure the BOD (biochemical oxygen demand) removal rate for a primary wastewater treatment plant. You take two samples of raw sewage on its way into the plant and two samples of the effluent leaving the plant. Standard five day BOD tests are run on the four samples with no seeding, producing the following data (See Figure attached)

Find BOD₅ for the raw and treated sewage, and the percent removal of BOD in the treatment plant.
Find the DO (dissolved oxygen) that would be expected in sample two at the end of the test.
What would be the maximum volume of treated sewage for Sample 4 that could be put into the 300-mL BOD bottle and still have the DO after five days remain above 2 mg/L?

nitrifica
(a) What is the five-day BOD of the wastewater?
(b)
Assuming
What would be the remaining BOD after five days have elapsed?
(d) Estimate the reaction rate constant k (day-¹).
Suppose you are to measure the BOD removal rate for a primary wastewater treatment
plant. You take two samples of raw sewage on its way into the plant and two samples of
the effluent leaving the plant. Standard five-day BOD tests are run on the four samples,
with no seeding, producing the following data:
Sample
1
2
3
4
no nitrification effects, estimate the ultimate carbonaceous BOD.
Source
Raw
Raw
Being measured is carbonaceous.
Treated
Treated
Dilution
1:30
1:15
1:20
?
ping. Assume
DO;(mg/L)
9.2
9.2
9.0
9.0
DO (mg/L)
2.2
?
2.0
>0

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