سال انتشار: ۱۳۸۵

محل انتشار: هفتمین کنگره بین المللی مهندسی عمران

تعداد صفحات: ۸

نویسنده(ها):

M.Arbabi – Assistance professor
S.Nasseri – professor
A.R.Mesdaghinia – professor
M.A.Warith – professor

چکیده:

Polycyclic aromatic hydrocarbons (PAHs) are suspected toxis that accumulate in soils and sediment due to their insolubility in water and lack of volatility . there are several treatment methods for PAHs contaminated soils, but slurry – phase biological treatment is one the innovative technology that involves the controlled treatment of excavated soil in a bioreactor. This study presents the results of a bench-scale program which was conducted to remediation of PAH – contaminated soils using slurry phase bioreactor with mix bacterial consortium in this study we focused on clayey phenanthrene contaminated soil with three different contamination levels, namelt; 100 mg/l, 500mg/l and 1000 mg/l . soil samples, after enrichment process and nutrient adding putted in the shaker uncubator for a 45 day period. Results showed the concentration of 100 mg/l decreased to non detected level after 30 days, but concentrations of 500 mg/land 1000 mg/l reached to 5 mg/l and 160 mg/l after 45 days respectively. The removal time of biotreatment of phenanthrene in slurry bioreactor decreased as the concentration of it decreased.