Relation between Resident Time Distribution of Bioreactor and Its Efficiency of Brewery Wastewater Treatment

The resident time distribution(RTD) of bubble column bioreactor(BC) and airlift loop bioreactor(AL) could be described in combinated model according to the studies on the hydraulics of BC and AL. The full mixture volumes in AL were 2.15% larger than in BC and especially rate of short flow in AL was less than in BC, because the fluid was forced to flow by the draught tube. Compared with BC, AL is more efficient in the treatment of brewery wastewater as improvement of RTD. Experimental results indicated that improvement of RTD could promote the transfer of gas liquid and improve the efficiency of wastewater treatment obviously.