PAC-membrane filtration process.: I:: Model development

被引:45
作者
Campos, C
Mariñas, BJ
Snoeyink, VL
Baudin, I
Lainé, JM
机构
[1] Ctr Int Rech Eau & Environm, Drinking Water Proc Dept, F-78230 Le Pecq, France
[2] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA
来源
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE | 2000年 / 126卷 / 02期
关键词
D O I
10.1061/(ASCE)0733-9372(2000)126:2(97)
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Adsorption is modeled when powdered activated carbon (PAC) is applied in continuous-flow reactors followed by membrane filtration units operated without carbon wastage between backwash events. Four reactor configurations are studied: (1) A membrane reactor dosed with a step input of PAC; (2) a continuous flow stirred tank reactor dosed with a step input of PAC and followed by a membrane reactor; (3) a plug-flow reactor dosed with a step input of PAC and followed by a membrane reactor; and (4) a membrane reactor dosed with a pulse input of PAC at the beginning of the filtration cycle. A steady-state operation is considered to describe the adsorption process through the continuous-flow stirred tank reactor and plug-flow reactor, whereas adsorption in the membrane reactor is modeled as a non-steady-state process. Adsorption kinetics is assumed to occur by homogeneous surface diffusion, and adsorption equilibrium is described with the Freundlich isotherm model. Analytical solutions of the homogeneous surface diffusion model with no external mass transfer limitation are used to evaluate adsorbate concentrations in the solid phase as a function of time. Part II of this study presents model simulations and verification with experimental data obtained in a bench-scale apparatus.
引用
收藏
页码:97 / 103
页数:7
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