Soils are major support systems of human life and welfare. Pollution of soil is caused by the presence of contaminants or other alteration in the natural soil environment. There are many petroleum hydrocarbons polluted areas today due to incorrect use of oil products. The hydrocarbons biodegrading occur in most environments where hydrocarbons may serve as organic carbon sources. Bioremediation is based on the use of microorganisms or microbial processes to degrade environmental pollutants, and offers several advantages over the conventional chemical and physical technologies as costs and negative impact on soil structure. This method can be a low cost effective and also an environmental friendly technology. Low biodegradability and bioavailability of the petroleum hydrocarbons may limit the biodegradation in polluted areas. Biodegradation is defined as the biologically catalyzed reduction in complexity of chemical compounds. During remediation the bioengineer can enhance the biodegradation by adjustment of optimal technological parameters. The aim of this study is to develop and test in a greenhouse experiment an improved technology for bioremediation of crude oil polluted soils. The soil artificial polluted with crude oil will be treated with a natural biodegradable product and bacterial inoculum. The plant used in the greenhouse experiment is maize. In this paper are presented the resulted obtained in the second experimental year regarding the following parameters regarding plants growth: the number of plant/plot, the height of plants, the number of leaves and the biomass. It will be shown the influence of crude oil on plant growth in a soil treated with a natural biodegradable product. Bioaugmentation is frequently used for the enhancement of the biodegradative capacities of polluted soils. According with the results obtained, this method will be used in field and the rehabilitation and reuse in agriculture of soil polluted with crude oil will be possible in a shortened time.

biodegradation; polluted soils; maize; a natural biodegradable product

Presentation: oral