The pH value of oxidised sewage is about_____________________?
Correct answer: C. 7.3
- A. 1.8
- B. 6.2
- C. 7.3
- D. 13.4
Explanation
After biological oxidation and stabilisation, sewage is generally close to neutral, with a typical pH around 7.3. The strongly acidic and strongly alkaline values are inconsistent with ordinary oxidised sewage.
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