1499. 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___________? September 7, 2025 by Admin A. 100 ppm B. 200 ppm C. 300 ppm D. 400 ppm ✅ The correct answer is option B.
