生物膜法污水处理用新型纤维素载体的制备与性能

Preparation & performance of a novel cellulose carrier for wastewater treatment by biofilm process

以麦草浆粕为原料,研究开发出了一种适用于生物膜法污水处理的多孔生物膜载体.实验通过对麦草浆粕碱化、黄化制备出酯化均匀的纤维素粘胶,并在此基础上选取合适的发泡成孔技术和纤维素再生工艺得到多孔纤维素载体成品.实验考察了各制备条件对载体性能的影响,总结出了该工艺下性能最优的载体的制备条件.研究结果表明,制得载体的孔隙率可达85%,比表面积在11m2.g-1以上,孔径从100μm^800μm均可人为控制.制得的多孔纤维素载体成本低廉,用于污水处理效果十分良好.

A novel porous carrier making from pulp of wheat straw was developed for bio-treatment of wastewater. Cellulose viscose was firstly prepared by alkalifying and esterifying wheat pulp （ containing 91% α-cellulose） , then the carrier was obtained after being foamed and regenerated with certain technology. The effects of produce conditions on performance parameters of carrier were discussed, and then the optimum process condition was concluded. The porosity and the specific surface area of the carrier can reach to 85% and 11m^2· g^-1 respectively, together with a controllable aperture ranging from 100μm to 800μm. All of these characteristics make this low-cost carrier high efficient for water treatment, especially for the using of bio- membrane reactor.