聚乙烯醇-海藻酸钠固定Flavobacteriumsp对地表水的修复效果

从河流底泥、河水水体中分离得到一株黄杆菌Flavobacteriumsp．（Oil56）．用聚乙烯醇（polyvinylalcohol，PVA）和海藻酸钠（sodiumalginates，Na·Alg）为包埋载体，以五硼酸铵和氯酸铁溶液为交联剂，固定黄杆菌Flavobacteriumsp．Oil56得到固定化球形颗粒．对比研究了固定化颗粒与游离菌对地表水的降解效果，结果表明在COD初始质量浓度为77~205mg／L时，用固定化Flavobacteriumsp．Oil56修复48h的COD去除率为48．2％～50．6％，比游离菌的降解效率提高了42．7％～45．8％．利用扫描电镜（SEM）研究了固定化球形颗粒在降解过程中的微环境变化．

Treatment efficiency of polyvinyl alcohol and sodium alginate immobilized Flavobacterium sp.

One strain was isolated from hydrocarbon-polluted surface water and sludge and was representative of Flavobacterium sp. （strain Oil-56）. Polyvinyl alcohol （PVA） and sodium alginates （Na·Alg） embedding technology were adopted for Flavobacteriurn sp. immobilization. Secondly, the study investigated the treatment efficiency of the immobilized Flavobacteriurn sp. The immobilized Flavobacterium sp. beads made in this study were suitable for remediation of COD- contaminated surface water with a wide range of initial COD values. At initial COD 77-205 mg/L, the residual COD values for immobilized cells were 38-98 mg/L after 48 h, with removal efficiencies of 48. 2%-50. 6%, which was 42. 7%-45.8% higher than the free cells. The Scanning Electronic Microscope （SEM） analysis indicated that the bead microstructure was suitable for growth of Flavobacterium sp.