喷射环流膜生物反应器水力特性的研究

通过清水试验,确定了喷射环流膜生物反应器的最大吸气量,探讨吸气量、循环水量等因素对气含率、液相循环速度的影响,测定膜组件加入前后的气含率、液相循环速度大小,并与已有的生化反应器进行了比较.结果表明,装置的最大吸气量可达到0.67 m~3·h~(-1)吸气量是影响气含率的主要因素,并且随着吸气量的增加,气含率也随着增加;循环水量是影响液相循环速度的主要因素,随着循环水量的升高循环液速升高;膜组件的加入对气舍率、液相循环速度的影响非常小,与已有的生化反应器比较,JLMBR在水力特性方面具有明显的优势.所得结果可以为该类反应器的放大设计提供借鉴.

STUDY ON THE HYDRODYNAMIC CHARACTERISTICS OF JET LOOP MEMBRANE BIOREACTOR

The biggest suction of bioreactor was examined by using tap water. The influence of suction and liquid circulation on gas holdup and liquid circulation rate was discussed. Compared with existing bioreactor and measured gas holdup and liquid circulation velocity with membrane in the biore-actor or not. The results showed that the biggest suction could reach 0.67 m~3·h~(-1).The suction was primary factor which effected gas holdup, gas holdup would increase gradually as suction increased. The liquid circulation was primary factor which effected liquid circulation velocity, as liquid circulation increased; liquid circulation velocity would increase rapidly. Membrane had little effect to gas holdup and liquid circulation velocity. JLMBR has shown the comparative advantage in hydrodynamic characteristics to existing bioreactor. It provides a theoretical basis and base data for design and scaling up of the reactor.