A bacteria injection scheme for in situ bioaugmentation
Journal
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Journal Volume
48
Journal Issue
9
Pages
1079-1085
Date Issued
2013
Author(s)
Abstract
This article presents an innovative design for inoculating the desired organisms to stratified geological layers at desired rates during in-situ bioaugmentation. The new delivery system consists of intermittent porous tubes connected in series with impermeable polyethylene tubes that run horizontally in each stratified layer of a contaminated aquifer. A bioaugmentation test using the new delivery system was conducted to inject an enriched culture of Escherichia coli (E. coli). Results of the test indicated that the distribution of E. coli through each porous tube was fairly uniform. A mathematical model previously developed to calculate the distribution of water flow through each porous tube was modified to calculate the distribution of E. coli. Geological layers often have different hydraulic conductivities. By controlling the permeability and the length of porous tubes placed in stratified layers, the new design provides a means to selectively deliver aqueous bacteria to various layers at desired rates according to aquifer heterogeneity. © 2013 Copyright Taylor and Francis Group, LLC.
SDGs
Type
journal article