Prediction of microbial transport distances are usually based on the sticking efficiency, a parameter in the classical colloid filtration theory. This parameter represents the interaction between colloid and collector surfaces resulting in deposition. According to the theory, the sticking efficiency is invariable when physico-chemical characteristics of aquifer media are homogeneous. However, many research results have indicated variations within bacterial strains.

In this research, the transport of Escherichia Coli in saturated quartz columns were conducted in the laboratory. The objectives were to characterise the distribution of sticking efficiency, measure low sticking efficiency values of cells, and to develop a methodology to measure minimum values of sticking efficiencies within bacterial sub-populations. Also, the work assesses the contribution of phenotypic and genotypic characteristics of Escherichia coli on their attachment to quartz grains.

1. Introduction

2. Effects of surface characteristics on the transport of multiple Escherichia coli isolates in large scale columns of quartz sand

3. Towards understanding inter-strain attachment variations of Escherichia coli during transport in saturated quartz sand

4. Determining the minimum sticking efficiency of six environmental Escherichia coli isolates

5. Transport of Escherichia coli in 25 m columns

6. Transport of Escherichia coli strains isolated from spring water

7. Transport of Escherichia coli strains isolated from springs in Kampala, Uganda

8. Summary, conclusions and recommendations