摘要
制备了两种不同孔径（ｄ＞０．５μｍ）分率的聚丙烯酸酯类多孔载体，与多孔颗粒活性炭（ＧＡＣ）在完全相同的启动条件下，作厌氧流化床固定化微生物对比实验．结果表明：新型高分子载体能有效促进厌氧菌固定化速度，可比ＧＡＣ缩短反应器启动时间１５ｄ左右；扫描电镜观察发现，多孔高分子生物颗粒球形度高，表面生物膜致密坚实，内孔微生物聚集丰富，而ＧＡＣ生物颗粒形状不规则，表面生物膜疏松呈鳞片状，内孔不易驻留微生物．另外，根据高分子载体内孔产甲烷丝菌的形态和分布特征，获取了当生物膜持续增厚后（δ＞１００μｍ），基质扩散阻力影响内孔微生物活性的证据．
The effects of two polyacrylic carriers with different large POre(d>0.5μm)fraction and granular activated carbon(GAC)on start up performance of anaerobic fluidized bed were compered and evaluated under the same conditions. The experimental data indicated that the new polymer carriers could improve the microorganism immobilization rate and reduce the shirt up time by hall a month as compered with GAC.It was discovered by SEM that the bioperticles of porous polymer carriers were spherical,of which the outface film was very compact and the inner pores were filled up with microbes. But the bioperticles of GAC were of irregular shape and the outface film was very loose.It was difficult for cells to colonize in the inner pores of GAC.Furthermore,hosed on the different morphology of Methanothrix and the distribution characteristics of the inner pore microbes,when the bio film grew thicker(6>100μm),it was evident that the mass transfer resistance obviously affected the activity of inner pore cells.
出处
《应用与环境生物学报》
CAS
CSCD
1996年第2期147-151,共5页
Chinese Journal of Applied and Environmental Biology
基金
国家自然科学基金
关键词
废水处理
厌氧流化床
高分子载体
anaerobic fluidized bed
microcarriers
biofilm
immobilized microorganism cell
