Environmental Engineering Reference
In-Depth Information
Fig. 2.4 Cultivation of
bacteria for biocement
production in 50 L
fermentor(photo taken at the
Fermentation Facility, Iowa
State University,USA)
Application of microorganisms for ground improvement can be performed by
indigenous microorganisms of soil, without preparation and supply of the micro-
bial inoculum, and without downstream processes. However, there could be such
downstream step as detoxication of polluted air and water after biocementation.
The medium for microbial cultivation and the treatment medium for soil/par-
ticles can be mixed together or used separately in the form of solution, suspension,
or slurry by the mixing of chemical reagents and agricultural fertilizers. Different
kind of wastes or residuals such as mining and agricultural residuals, organic
fraction of municipal solid wastes, sewage sludge, and reject water of municipal
wastewater treatment plants can be used as a medium to reduce the cost of large-
scale biogeotechnical work.
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