+1 vote
in Environmental Engineering by (81.4k points)
The color of the septic sewage is __________

(a) Pink

(b) Red

(c) Black

(d) Grey

I had been asked this question in an online interview.

This is a very interesting question from Physical Characteristics of Waste Water topic in chapter Wastewater Characteristics of Environmental Engineering

1 Answer

+2 votes
by (693k points)
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Best answer
Correct option is (c) Black

Easy explanation: The color of septic sewage is black or dark brown. It contains either little or no oxygen.

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