Question

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
f
at the end of 5 day incubation at 20°C.
The BOD of raw sewage will be
​

Answer 1

Answer:

For example: 1.0 mL of a full strength wastewater sample added to 9.0 mL of DI water results in a 0.1 dilution of the wastewater. The DO concentration (mg/L) reduction must then be multiplied by 10 to determine the final BOD concentration.