MACSI, University of Limerick, Limerick, Ireland,
Bull Math Biol. 2013 Oct;75(10):1985-2001. doi: 10.1007/s11538-013-9881-y. Epub 2013 Aug 10.
We provide a simple mathematical model of the bioremediation of contaminated wastewater leaching into the subsoil below a septic tank percolation system. The model comprises a description of the percolation system's flows, together with equations describing the growth of biomass and the uptake of an organic contaminant concentration. By first rendering the model dimensionless, it can be partially solved, to provide simple insights into the processes which control the efficacy of the system. In particular, we provide quantitative insight into the effect of a near surface biomat on subsoil permeability; this can lead to trench ponding, and thus propagation of effluent further down the trench. Using the computed vadose zone flow field, the model can be simply extended to include reactive transport of other contaminants of interest.
我们提供了一个简单的数学模型，用于描述渗滤系统下受污染废水浸出到地下土壤中的生物修复过程。该模型包括对渗滤系统流动的描述，以及描述生物量增长和有机污染物浓度吸收的方程。首先将模型无量纲化，可以对其进行部分求解，从而对控制系统效率的过程提供简单的见解。特别是，我们提供了对近地表生物膜对土壤渗透性影响的定量见解；这可能导致沟渠积水，从而使废水进一步向下沟渠传播。利用计算得到的非饱和带流场，模型可以简单地扩展到包括其他感兴趣的污染物的反应传输。
