testingmethodsop

                      SEED BOD CALCULATION    In BOD analysis we need to seed the sample when there is no microorganism in the sample i.e. bacteria that eat the organic matter present in the sample are not there in the sample so microorganism has to be added to the sample. We need to seed the sample only when the sample taken from waste water, we do not required seeding in the river or sewage samples because they already contain microorganism. How to estimate BOD in sample It is very important to select the suitable volume of sample for dilution other wise all effort will be  vail. so here are some calculation for the estimation of BOD, once you get idea about the estimated bod in the sample then you will be able to select suitable portion of sample for dilution. First we have to determined it's COD after that we can calculate estimated  BOD  generally your BOD will be 70% of COD. once you get estimated...