胞外高分子物质对基质在复合生物膜内传质速率影响的测定

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胞外高分子物质对基质在复合生物膜内传质速率影响的测定

曹宏斌^a; 李鑫钢^b; 姜斌^b; 孙津生^b; 张懿^a

^a Institute of Process Engineering, Chinese Academy of Sciences, P.O.Box353, Beijing 100080, China ^b Chemical Engineering ResearchCenter, School of Chemical Engineering ＆ Technology, Tianjin University, Tianjin 300072, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-08-28 发布日期:2004-08-28
通讯作者: 曹宏斌

Evaluation of the Influence of Extracellular Polymeric Substances on the Mass Transport of Substrate within Multispecies Biofilms

CAO Hongbin^a; LI Xingang^b; JIANG Bin^b; SUN Jinsheng^b; ZHANG yi^a

^a Institute of Process Engineering, Chinese Academy of Sciences, P.O.Box353, Beijing 100080, China

^b Chemical Engineering ResearchCenter, School of Chemical Engineering ＆ Technology, Tianjin University, Tianjin 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2004-08-28 Published:2004-08-28
Contact: CAO Hongbin

摘要/Abstract

摘要： A model, for evaluating the effect of porosity and volume fraction of extracellular polymeric substances (EPS) within multispecies biofilms on the effective diffusivity, is developed and experimentally validated, based on the extraction of EPS from intact biofilms. The amount of EPS in biofilms significantly affects the effective diffusivity. For biofilms with porosity of 77%—95% in the top layers and 54%—58% in the bottom layers, the value of De/Dw decreases from 0.52—0.83 in the top layers to 0.23—0.31 in the bottom layers. Generally, the effective diffusivity in the heterotrophic/autotrophic biofilms is slightly lower than that in the heterotrophic biofilms, due to the lower porosity in the heterotrophic/autotrophic biofilms.

关键词: 聚合体;传送器;酶作用物;生物反应器;废水处理工艺

Abstract: A model, for evaluating the effect of porosity and volume fraction of extracellular polymeric substances (EPS) within multispecies biofilms on the effective diffusivity, is developed and experimentally validated, based on the extraction of EPS from intact biofilms. The amount of EPS in biofilms significantly affects the effective diffusivity. For biofilms with porosity of 77%—95% in the top layers and 54%—58% in the bottom layers, the value of De/Dw decreases from 0.52—0.83 in the top layers to 0.23—0.31 in the bottom layers. Generally, the effective diffusivity in the heterotrophic/autotrophic biofilms is slightly lower than that in the heterotrophic biofilms, due to the lower porosity in the heterotrophic/autotrophic biofilms.

Key words: biofilm, extracellular polymeric substance, effective diffusivity

曹宏斌,李鑫钢,姜斌,孙津生,张懿. 胞外高分子物质对基质在复合生物膜内传质速率影响的测定[J]. CIESC Journal.

CAO Hongbin,LI Xingang,JIANG Bin,SUN Jinsheng,ZHANG yi. Evaluation of the Influence of Extracellular Polymeric Substances on the Mass Transport of Substrate within Multispecies Biofilms[J]. .

胞外高分子物质对基质在复合生物膜内传质速率影响的测定

Evaluation of the Influence of Extracellular Polymeric Substances on the Mass Transport of Substrate within Multispecies Biofilms

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