一种负载型生物载体的制备及性能研究

Study on Preparation and Performance of a Biological Carrier with Tourmaline

为强化载体表面生物膜的活性,研究以水性聚氨酯(waterborne polyurethane)为介质制备负载电气石的聚氨酯(tourmaline on polyurethane,TPU)载体.用扫描电镜(SEM)和持水倍率表征载体的物理性能,并且考察TPU载体对挂膜量及硝化能力的影响.结果表明,水溶性聚氨酯浓度能够影响TPU载体对电气石的负载量,导入电气石可以优化TPU载体上极性基团的数量以及环境pH值,亚硝酸菌和硝酸菌在TPU载体上的不可逆附着量分别提高了74.82%和71.89%.与未投载体相比,NH4+-N和NO2--N的去除率分别提高了8.12%和9.08%,表明优化的TPU载体能促进硝化作用.

In order to strengthen the activity of biofilm on the carrier surface, the tourmaline on polyurethane （TPU） carrier was prepared using waterborne polyurethane as medium. The physical properties of TPU carrier were characterized by scanning electron microscope（SEM） and water absorbency, and its effect on biofilm biomass and nitrifying ability was studied. The results showed that the tourmaline loading amount of TPU carrier can be affected by waterborne polyurethane. Tourmaline can optimize the number of polar groups of the TPU carrier and the pH of the nitrification condition. The amount of nitrobacteria and nitrate bacteria irreversibly adsorbed on the TPU carrier was increased by 74. 82% and 71.89% , respectively. Correspondingly, the removing rate of NH4＋ -N and NO2 -N has risen by 8.12% and 9.08% , respectively, compared to the control without carrier. The TPU carrier was indicated to promote the nitrification.