16.06.2014

Bioremediation uses a consortium of crude oil-degrading bacteria derived from various naturally occurring and non-pathogenic bacterial cultures. Within four months, these biological organisms eat up the contaminants (mostly organic compounds), convert them into carbon dioxide and clean up the surrounding area without any harmful residue or side-effects. In the first two years of the SEED project, more than 36,000 tonnes of contaminated soil was remediated by bioremediation, the target being 200,000 tonnes by the end of the project. Thermal desorption technology utilises heat to increase the volatility of contaminants such that they can be removed (separated) from the solid matrix (typically soil). The volatilised contaminants are then either collected or thermally destroyed. The Thermal desorption units currently used remediate about 20–30 tonnes of soil per hour. Around 0.8 million cubic metres of contaminated soil is to be remediated through the thermal desorption and soil washing technology. Afterwards, the features are to be backfilled with remediated soil, and native plant species like Astragalus spinosus, Rhanterium epapposum, etc.