Waste Water Engineering

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. All the above
Answer: Option D.

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