Question
Download Solution PDFThe relative stability of a sewage sample whose dissolved oxygen is same as the total oxygen required to satisfy the BOD is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Relative stability:
The ratio of oxygen available in the wastewater (as dissolved oxygen) to the total oxygen required to satisfy its first state BOD is called relative stability.
\(Relative\;stability\; = \;\frac{{BOD\;removed}}{{Total\;BOD}} \times 100\)
Note:
As the DO level of the sewage is equal to the total oxygen required to decompose the organic matter present, total BOD will be removed.
∴ Relative stability = 100%
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