Optimization Design for the Hollow Fiber Membrane Module in Membrane Bioreactor

In optimization design for hollow fiber membrane module by using hydraulic calculation, it was found that the geometric dimension has great effect on water yield. Because the driving force of effluent keeps high value only in a short part of total fiber length, the water yield per unit length of fiber is on the progressive decrease along with the increased fiber length. As a result, under the allowable economic condition, the membrane should be made as short as possible. Meanwhile, the longer the cohesion length of fiber, the lower the water yield is. Thus, the cohesion length should also be manufactured as short as possible under the permissible condition of membrane strength. By using the efficiency per unit area as objective function, hydraulic calculation and optimization design were carried out for the membrane module only from the point of view of hydraulics. Other affecting factors shall be taken into consideration in practical engineering application.