Disclosed herein is a system and method for condensing moisture in a gas stream entering or leaving a bioreactor, the system comprising: a contact condenser container fluidically coupled to the bioreactor through an exhaust line; a condensate accumulator fluidically coupled to the contact condenser container through at least a first condensate line and a second condensate line; the condensate accumulator further fluidically coupled to the bioreactor through a condensate overflow line; a first condensate control device disposed on the first condensate line and configured to control a flow of condensate leaving the contact condenser container and entering the condensate accumulator; and a second condensate control device disposed on the second condensate line and configured to control a flow of condensate leaving the condensate accumulator to be mixed with the gas stream.