生物流化床多孔生物颗粒沉降性能及床层膨胀特性研究  

Porous Bio-particles Settling and Bed Expansion Characteristics of Fluidized-bed Biological Reactor Treatment Wastewater Systems

作　　者：杨平[1] 郭勇[1] 石炎福[1] 

机构地区：[1]四川大学化工学院,四川成都610065

出　　处：《化学反应工程与工艺》2003年第1期89-96,共8页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金项目(20076030)

摘　　要：　以Richardson-Zaki公式为基础,研究了由HP多孔高分子载体固定化微生物废水处理时,形成的生物颗粒沉降性能及生物流化床的床层膨胀特性。研究表明:HP球形多孔载体CD值略高于其他研究者得到的生物颗粒CD值,其值为:CD=16.43Ret-0.41,(10<Ret<50);该值也比实心、刚性、球形载体的CD值高;HP载体生物流化床的床层膨胀仍可用Richardson-Zaki公式来表达,但膨胀指数n应作修正,修正后的表达式为:n=5.04Ret-0.114,1<Ret<50。The settling velocity and bedexpansion characteristics of the lowdensity spherical porous HP bioparticles were studied based on the RichardsonZaki equation. Experiments showed following results: because of the roughness, the drag coefficient (CD)of the bioparticles of HP is higher than that of other carriers, such as smooth, rigid and spherical particles and so on, and it is also higher than that obtained by other researchers. The drag coefficient equation for HP bioparticles is: CD=16.43Ret-0.41, (10<Ret<50). The bedexpansion characteristics of the bioparticle carriers can be expressed by RichardsonZaki equation. It was found that the expansion index is less than that of other carriers in a fluidizedbed bioreactor. The expansion index is: n=5.04Ret-0.114,1<Ret<50.

关 键 词：生物颗粒 床层膨胀 生物流化床 废水处理 

分 类 号：X505[环境科学与工程—环境工程]