藻菌包埋固定条件优化及对污水中氮磷去除率的影响  

Effects of Optimized Encapsulation Formulations of Microalgae and Bacteria on the Nitrogen and Phosphorus Removal from Wastewater

作　　者：李安琦 马晓君 安晓倩 刘志媛[1] 王永强[1] 

机构地区：[1]海南大学海洋学院,海南 海口

出　　处：《水污染及处理》2021年第4期155-165,共11页Water Pollution and Treatment

摘　　要：本研究以不同配比的海藻酸钠(SA)和聚乙烯醇(PVA)为复合载体材料制备包埋藻菌的凝胶球,首先以凝胶球的抗压强度和机械强度为指标筛选最佳配方为PVA 5%:SA 1.5% = 1:1.5。以优选配方包埋热带海域筛选的广盐性小球藻Chlorella sp. HNC11和假单胞菌,以及活性污泥,测定几种固定化微生物小球对模拟污水中 和TP的去除效率。研究结果表明,固定化藻球、固定化菌球和固定化藻–菌复合球在6小时内,三种固定化小球均显著降低了富氮磷水体中的N/P。配方I (4% PVA和1.5% SA的比例为1:1.5)制备的藻球和配方III (5% PVA和1.5% SA的比例为1:1.5)制备藻–菌球表现出最高的 去除效率,6小时去除率为8.99%,TP去除效率分别为71.27%和73.02%。以配方I制备的菌球表现了最高的TP去除率,为73.93%。In this study, gel beads for the encapsulation of microalgae were produced using different ratios of sodium alginate (SA) and polyvinyl alcohol (PVA) as composite carrier materials. And the best for-mulation of PVA 5%:SA 1.5% = 1:1.5 was selected based on the compressive strength and mechan-ical strength. The formulation was used to encapsulate Chlorella sp. HNC11 selected from tropical waters, Pseudomonas spp. and activated sludge to determine the efficiency of several embedded microbial beads for the removal of and TP from simulated wastewater. The results showed that all three types of embedded microbial beads significantly reduced N/P in simulated wastewater within 6 hours. The microalgal beads made by the formulations of PVA 4%:SA 1.5% = 1:1.5 and the microalgae-bacterial beads made by the formulations of PVA 5%:SA 1.5% = 1:1.5 showed the highest removal efficiency, which was 8.99%. And their TP removal efficiencies were 71.27% and 73.02% respectively. Bacterial beads produced by the formulations of PVA 4%:SA 1.5% = 1:1.5 showed the highest removal rate of TP, which was 73.93%.

关 键 词：藻菌共生体系 固定化 包埋技术 铵氮去除率 总磷去除率 

分 类 号：X70[环境科学与工程—环境工程]