菌藻共固定化降解微囊藻毒素

研究了微囊藻毒素降解菌S3和椭圆小球藻L1共固定化后,对微囊藻毒素(MC-LR)的降解作用.结果表明,共固定化藻菌体系比单独固定化菌对MC-LR有更好的降解效果,共固定的藻可促进降解菌S3的生长.固定化细胞对毒素的降解能力较稳定,受环境温度和pH变化的影响较小,重复使用仍可维持较高的降解活性.

Degradation of microcystin-LR by co-immobilizeation of a bacterium S3 and an algae Chlorella ellipsodea L 1

Cyanotoxins produced by cyanobacteria have caused pollutions in land surface water around the world. The most common toxin is microcystin,a cancer inducing hepatoxin.Microcystin is chemically stable in water and can't be effectively removed by conventional water treatment processes.Microbiological removing,especially bacte- rial degrading was an effective way to eliminate microcystins from water.In this research,Cyanotoxin degrading bac- terium strain S3 and Chlorella dlipsodea L1 were co-immobilized by sodium alginate to degrade microcystin-LR (MC-LR).Results showed that the alga could increase the growth of strain S3 in the gel beads.The co-immobi- lized bacteria had a higher degrading efficiency of MC-LR than independent immobilized cell.The degrading effi- ciency of immobilized cells was influenced less than the free cells when temperature and pH changed.When the immobilized cells were re-used,they could maintain high degrading efficiency.