Integrated Method for Recovering Oil Sludge
V. S. OBSYANNIKOVA1, L. I. SVAROVSKAYA1, L. K. ALTUNINA1, D. A. FILATOV1, E. A. FURSENKO2 and V. A. KASHIRTSEV2
1Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Pr. Akademicheskiy 4, Tomsk 634021 (Russia)
varja@ipc.tsc.ru
2Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Pr. Koptyuga 3, Novosibirsk 630090 (Russia)
Keywords: oil sludge, sludge pits, hydrocarbons, surfactants, detergent compositions, hydrocarbon-oxidizing bacteria, biodestruction, reclamation
Pages: 155–162
Abstract
Results are presented concerning the recovery of an oil sludge model from the contamination by means of a complex microbiological and physicochemical method. It is demonstrated that washing with a detergent composition results in a 55–75 % decrease of soil contamination level. The subsequent biodestruction by native microflora further reduces the contamination by 20–30 % per month. In the case of the mechanical part of the sludge, the microflora is worthwhile for stimulation by nitrogen and phosphorus containing mineral substrates, whereas in the case of spent water the mineral nutrition can be provided by the components of the composition. Changing the structural and group as well as the individual composition of hydrocarbons in the spent water corresponds to the initial stage of biodestruction, whereas that in the washed soil corresponds to the middle stage thereof, which indicates a low activity of the indigenous microflora.
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