Modeling biofilms on gas-permeable supports: Concentration and activity profiles
Modeling biofilms on gas-permeable supports: Concentration and activity profiles
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DOI：
10.1061/(asce)0733-9372(2000)126:3(250
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发表时间：
2000-03-01
期刊：
影响因子：
--
通讯作者：
Voller, VR
中科院分区：
文献类型：
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作者：
Essila, NJ;Semmens, MJ;Voller, VR
一些研究人员已经表明，膜氧合在生物处理中提供了许多优点。这些优点包括操作灵活性、降低的能源需求和挥发性化合物的汽提量减少。还观察到膜提供：微生物生长的支撑表面。该稳态模型研究了在透气膜和不透气固体支撑表面上的好氧异养生物膜的微生物对氧和碳源底物的吸收。该模型的预测表明，非常不同的浓度和活性分布可能会发现在固体表面和气体渗透膜上生长的生物膜。对于固体支撑的生物膜，最高浓度的氧气和基质以及最大的微生物活性位于生物膜的外部。对于膜支撑的膜，氧和底物从不以其最大浓度存在于相同位置，并且生物膜中最大生物活性的位置可以发生在膜内的其他位置。这些差异可能导致微生物生态学和生物膜种群的显著差异，进而导致生物膜形态的显著差异。
Several investigators have shown that membrane oxygenation provides a number of advantages in biological treatment. These include operational flexibility, reduced energy requirements, and less stripping of volatile compounds. Membranes have also been observed to provide: a support surface for microbial growth. This steady-state model study investigates the microbial uptake of oxygen and a carbon-source substrate for aerobic, heterotrophic biofilms on gas permeable membrane- and impermeable solid-supported surfaces. The model predictions indicate that very different concentration and activity profiles may be found in biofilms grown on solid surfaces and gas permeable membranes. For a solid-supported biofilm the highest concentrations of oxygen and substrate and the greatest microbial activity are located on the outside of the biofilm. For a membrane-supported film, the oxygen and substrate are never present at the same location in their maximum concentrations, and the location of maximum biological activity in the biofilm can occur at other locations within the film. These differences may lead to significant differences in the microbial ecology and populations of biofilms and, in turn, in biofilm morphology.