Title: Potential of preliminary test methods to predict biodegradation performance of petroleum hydrocarbons in soil 
Resource Type: web links 
Producers or distributor AIchberger, Hildegard 
Other producers or distributors: Marion Hasinger, Rudolf Braun & Andreas Paul Loibner 
Author / Producer Type: University research group / research institute 
Web link for product information: http://www.SaveOurSoils.at  
EUGRIS Keyword(s): Brownfields
 
Short description: Performance of preliminary tests at different scales to predict feasability, degradation rates and residual concentrations of bioremediation in the vadose zone. 
Long description: Preliminary sts at different scales such as degradation experiments ( laboratory) in shaking flasks, soil columns and lysimieters as well as in situ respiration tests ( field) were performed with soil from two different hydrocarbon contaminated sites. Tests have been evaluated i terms of their potential to provide information on feasability , dagardation rates and residual concentration of bioremediation in the vadose zone. Sample size, costs and duration increased with experimental scale in the order shaking flasks - soil solumns - lysimeter - in situ respiration tests, only time demand of respiration tests was relatively low. First-order rate constants observed in degradation experiments exhibited significant differences between both, different experimental sizes and different soils. Rates were in line with type and history of contamination at the sites, but somewhat overestimated field rate particularly in small scale experiments. All laobratory experiments allowed an estimation of residual concentrations after remediation. In situ respiration tests were found to be an appropriate pre-testing and monitorung tool for bioventing altough residual concentrations cannot be predicted from in situ respiration tests. Moreover this method does not account for potential limitaions that might hamper the biodegradtaion in the longer term but only reflects the actual degradation potential when the test is performed. 
Submitted By: Prof Dr Andreas P Loibner WhoDoesWhat?      Last update: 11/10/2005