Processing high hardness and salinity karst water by the immobilized Geotrichum candidum in Taiyuan City
固定化白地霉处理高硬度及高矿化度岩溶水的研究

The preparation and activity assay of the immobilization of Geotrichum candidum were investigated and the capability of its chemical adsorbent was analyzed with the application of Microbial flocculants in treating Karst water with the high hardness and salinity. The results showed that G. candidum culture medium (No.3) was proved to be the best medium for expand training, and G. candidum with plenty of good activity for immobilization was obtained on the second day. The three kinds of ways with sodium-alginate, polyvinyl alcohol mixed with sodium alginate and alginate-gelatin-polyvinyl to immobilize G. candidum were used in this study and the optimum flocculation conditions to treat Karst water, by analyzing the flocculation capability of G. candidum immobilization pellets, were 4 g·L-1 PVA-SA-gelatin immobilized pellets and stirring for 60 min. The biggest flocculation rate on salinity and hardness were 96.88% and 50.00%. These results indicate the microbial flocculants will have the characteristics and advantages of easy operation, no secondary pollution, and better flocculation effects compared to the chemical adsorbents.