ENVIRONMENTAL ENGINEERING

CALCULATE THE HYDRAULIC RETENTION TIME, IF THE VOLUME AND DISCHARGE THROUGH REACTOR IS GIVEN

What is the hydraulic retention time for a factor that has a flow rate of 450 liter per minute and a volume of 32.5m^2

Steps to solve:

1. HRT is the ratio of volume of the reactor to the discharge through reactor.
2. convert the discharge from litres per day to cumecs.
3. now find the HRT 

CALCULATE THE BOD OF WASTE WATER 8ml, FOR WHICH INITIAL AND FINAL DO IS GIVEN

Steps to solve:

1. Calculate the dilution factor
2. Now find BOD.

CALCULATE THE DO OF WATER, WHEN WATER FROM FACTORY AND RIVER IS MIXED