A cost analysis was conducted to compare the proposed treatments implementable for small systems, while distinguishing the pros and cons of each. Influence of Biosurfactant and Non-Biosurfactant Producing Bacteria on Phenanthrene Removal from Model Soils , Thesis Defense by Julie Eyre , M.S. Chemical Engineering, November 23, 1999. PAHs include mutagenic and carcinogenic compounds, emphasizing the need for efficiently controlling and predicting their fate and transport in the subsurface. Some PAH remediation technologies that are currently in use include pump and treat systems, soil vapor extraction, and excavation. Each of these technologies are expensive and time consuming treatments.
Bioremediation offers a cost effective and efficient remediation option.
Because PAHs are hydrophobic, they tend to sorb strongly to soil particles. PAH biotransformation in soil is often limited by the rate at which PAHs can desorb from the soil. Previous research has shown that surfactant or biosurfactant addition increases the rate and extent of desorption and biotransformation of phenanthrene in soil. Few studies have examined how in-situ biosurfactant production effects desorption and biotransformation. Results indicate that phenanthrene initially adsorbed to PTFE particles can be biotransformed by biosurfactant and non-biosurfactant producing bacteria.