Biochemical Engineering questions..?

[michaelespiritu31]

1) It is desired to reduce the bacterial count of polluted water from 8 million organisms per mL to 17 organisms per mL. The number of completely mixed chloine chambers in series, each having a detention time of 40 minutes, that would be required if the first order rate constant is 8 per hour..


question number 2...
2) Given a specie of a microorganism that doubles every 2.5 hours, the mass of biomass that may be expected from 500 Liters of seed if each liter contains 5 grams biomass and the fermentation culture was maintained for 12 hours is?