Impact of Bioaugmentation on Treatment of Oily Sludge and Insights Based on GC-MS Analysis

Le résumé fourni par la source

This study reports the slurry phase treatment of oily sludge obtained from a petroleum refinery in India using specific oil-degrading microorganisms. The efficacy of bioaugmentation with strains Sphingomonas sp. (MSY) and Rhodococcus ruber (WSO) acclimatized to oil on treating oily sludge was explored. The initial oil content in the sludge was 9.48 ± 0.095%. Oil degradation in the bioaugmented systems over 30 days (50% and 48.9% for MSY and WSO, respectively) was almost comparable to the degradation in the nonbioaugmented controls (46 ± 3%). The nonbioaugmented controls showed a larger variability in oil degradation due to the uneven distribution of the indigenous oil degraders in the sludge. The sterile controls showed abiotic loss of only 4 ± 2% over 30 days. The maltene fraction in biodegraded samples was significantly enriched in polar components after 30 days, while the aliphatic and aromatic components showed significant depletion. Asphaltene enrichment in residual oil was observed due to the degradation of maltenes. GC-MS extracted ion chromatograms of the aliphatic fraction at specific m / z values provided valuable insights into changes in the targeted groups of components with biodegradation. This study revealed that biostimulation with nutrients and aeration would be adequate for the slurry phase treatment of fresh tank bottom sludge from refineries.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.