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Discussion :: Environmental Engineering - Civil Engineering

  1. In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be

    2. A.

     100 ppm
    B.

     200 ppm
    C.

     300 ppm
    D.

     400 ppm

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    Answer : Option B

    Explanation :

    Explanation Not Provided

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