00:01
Here in the first question, the bod, these stands for biological oxygen demand.
00:13
And biological oxygen demand, this is the amount of oxygen that is required by the microorganisms to break down the oil.
00:30
Organic material.
00:34
And the cod, this stands for chemical oxygen demand.
00:46
This is the amount of oxygen that is required to break down the organic material via oxidation.
01:10
And here the given sample, it has coliform bacteria.
01:17
So this, by the presence of coliform bacteria, it can be considered as a domestic waste water sample.
01:28
And as per the domestic wastewater sample, concentrations the bod and cod here these are of the medium strong waste water and this is the answer here the medium next question the hrt these stands for hydraulic retention time and in wastewater management these hydraulic retention time this is used as a measurement of the average time spent in keeping the waste water water in tank next the fm these stands for food to mass ratio and these is a measure of the amount of food that is given to the microorganisms in the in the the erasing tank and b s r t.
03:15
These stands for biological solid retention time.
03:28
And here these solid retention time...