Biostimulation and Monitoring of Diesel Fuel Polluted Soil Amended With Biowaste

Abstract

A lab-scale experiment was set up to investigate the efficiency of addition 5% (w/w) individually of three different organic solid waste amendments to enhance the rate of degradation at 5% and 15% diesel oil in polluted soil during 18 weeks. A total of 81% and 42% oil loss was recorded in soil amended with soycake at 5% and 15% oil pollution, respectively. The measured δ¹³C signature of CO₂ evolved from amending contaminated soil varied between –24 and –28‰. First-order kinetic model demonstrated that soycake had the highest rate of biodegradation of 0.114 days⁻¹ at 5% oil pollution. The results clearly indicate that those treatments amended with organic wastes had the best efficiency on the biodegradation of soil contaminated with diesel fuel.

Keywords:

• bioremediation
• contamination
• degradation
• diesel fuel
• organic waste