陶瓷膜在甘油发酵液除菌中的应用

将陶瓷膜应用于甘油发酵液的除菌操作中,考察了操作参数和清洗方法对膜通量的影响。结果表明,在压差0.1MPa、温度30℃、pH值7.0和错流速度3.5m/s条件下操作,有利于提高膜通量;发酵液过滤后,先以质量浓度为1%的NaOH和质量浓度为0.2%的NaClO混合液清洗膜40min,再以质量浓度为0.5%的HNO3溶液清洗5min,膜通量可迅速恢复。因此,陶瓷膜在甘油发酵液的除菌中是高效可行的。

The Application of Removing Cell from Glycerol Fermentation Broth with Ceramic Membrane

Removing cell from glycerol fermentation broth by ceramic microfiltration membrane and the effect of operation parameters on membrane filtrate flux was investigated. The conclusions were drawn that transmembrane pressure 0.1 MPa, temperature 30, pH 7.0 and cross-flow velocity 3.5 m/s were advantageous in enhancing the membrane filtrate flux. The action of membrane fouling was analyzed. The cleansing methods which can recover efficiently membrane filtrate flux were obtained. It took 40 minutes to clean the membranes by mixed solution composed of 1 % (w/v) NaOH and 0.2 % (w/v) NaClO. Thereafter, 0.5 % (w/w) HNO3 solution was used to clean the membranes for 5 minutes; the membrane filtrate flux can be recovered rapidly. The results indicate that removing cell from glycerol fermentation broth by ceramic microfiltration membrane was feasible.