اصلاح خاك هاي آلوده به تركيبات هيدروكربني بوسيله تكنيك زيست پالايي (مطالعه موردي: خاك هاي آلوده جنوب پالايشگاه تهران)

Remediation of hydrocarbon contaminated soils by means of bioremediation technology (Case study: Contaminated soils from southern lands of Tehran refinery)

In global view, soil is the most important part of environment. One of the results of sewerage and industrial wastes discharge to soil and groundwater is the accumulation of pollutant and toxic compounds in environment, whereas one of the best known of these pollutants are the hydrocarbon compounds. Bioremediation, in other hand biological removal of such compounds appears to be most reliable and confident technology among other remediation technologies. Therefore the aim of this work is to evaluate the ability of two isolates of indigenous bacteria which were isolated from oil contaminated soils, in cleaning and remediation of hydrocarbon compounds and investigating of their biological removal efficiency in optimal condition. This work was carried out through several steps including; 1- isolating and purification of indigenous bacteria for treatment of hydrocarbon contaminated soils. 2- Soil sampling and preparation for experiments. 3- Determination of biological removal rate for two bacteria in soil. Results showed that regarding to environmental conditions (temperature, 27±2; moisture, 60% FC and aeration) bacterial isolates could degrade and remove approximately 93% of gasoil after 45 days. It seems to be promising results, regarding to the time of experiment.