Civil Engineering > GATE 2013 > Water Treatment
A student began an experiment for determination of 5-day, 20°C BOD on Monday. Since the 5th day fell on Saturday, the final DO readings were taken on the next Monday. On calculation, BOD (i.e., 7-day, 20°C) was found to be 150 mg/L. What would be the 5-day, 20°C BOD (in mg/L)? Assume the value of BOD rate constant (k) at the standard temperature of 20°C as 0.23/day (base e).
Correct : 127 to 133
Similar Questions
Activated carbon is used to remove a pollutant from wastewater in a mixed batch reactor, which follows first-order reaction kinetics. At a reaction rate of 0.38...
A water treatment plant treats 25 MLD water with a natural alkalinity of 4.0 mg/L (as CaCO3). It is estimated that, during coagulation of this water, 450 kg/day...
A hypothetical multimedia filter, consisting of anthracite particles (specific gravity: 1.50), silica sand (specific gravity: 2.60), and ilmenite sand (specific...
Total Unique Visitors
Loading......