A PVA-SA hydrogel biocarrier was prepared by solution blending method with boric acid as crosslink-ing agent.Then the carrier was characterized by using specific surface area /aperture distribution, scanning e-lectron microscopy(SEM)and Fourier transform infrared spectroscopic methods.Furthermore,its biological ac-tivity and treatment efficiency in the wastewater treatment were investigated.The results show that the most suit-able PVA and SA concentrations are 7%and 1%respectively.Under these conditions,the specific surface area of gel beads is 24.233 m2· g -1.The average pore size is 60.895nm,and these pores are dominated by large and mesoporous pores.It is observed that the network of the gel beads is stable and has abundant pore structure under the scanning electron microscopy.With the formation of biofilm in the gel beads,the surface and internal of the gel beads effectively produce lots of microorganisms, which results in excellent biological activity.The batch test showed that the oxygen uptake rate of the carriers is 8.95 μgO2·(min· stars)-1and COD removal efficiency can reach 89%.Thus,the PVA-SA hydrogel gel bead can serve as an ideal biological carrier to speed up the biofilm formation and improve the efficiency of wastewater treatment.%该研究采用溶液共混法以硼酸作为交联剂制备PVA-SA水凝胶生物载体,并结合比表面积/孔径分布仪、扫描电镜及傅里叶红外光谱等分析手段对载体进行分析;通过快速排泥法对载体挂膜,考察其在废水处理中的生物活性和处理效果.结果表明,当PVA浓度为7%、SA浓度为1%时,制得PVA-SA水凝胶生物载体具有较好的热稳定性,比表面积为24.233 m2· g-1,平均孔径为60.895 nm,孔隙分布以大孔和中孔分布为主,微孔所占比例比较小.扫描电镜观察显示挂膜前的凝胶球空间网络稳定,有丰富的孔隙结构.挂膜后的凝胶球表面及内部有效富集了大量的微生物,生物活性较好,耗氧速率为8.95 μgO2·(min· 颗)-1,COD去除率能达到89%,能够作为一种理想的生物载体.
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