Civil Engineering - Waste Water Engineering - Discussion

25. 

Pick up the correct statement from the following :

[A]. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers
[B]. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated sewage in river
[C]. Solubility of oxygen in sewage is 95% of that of distilled water
[D]. Dissolved oxygen content of sewage, may be determined by Winkler's method
[E]. All the above.

Answer: Option E

Explanation:

No answer description available for this question.

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