Abstract: Treating Oil Contaminated Soils and Oil Sludges in Hungary

KOVACS, ROZSA; ERNO TOROK; GYORGY ISAAK; ADAM BALAZS; LASZLO BARANY

Oil contaminated soils and high heating value oil sludges formed in the petroleum industry are rated by the legislation hazardous waste. There are various treating methods. The main methods are the biological cleaning, washing, extraction and thermal treating. The best way of treating oily soil and other oily wastes having a heating value (above 7000 kJ / kg) is the energetic utilization. This does not mean in general a direct utilization but such technical process where the basic material is the waste which is treated with mixing and homogenization. So such solid or liquid alternative fuels are made which can be used favorably to replace coal or heating oil. The environmental specialists of MOL Rt. deem very important these methods to utilize tank sludge and wastes arising from pipeline leakage. The specialists of MOL Rt in cooperation with the power plant engineers developed a method to utilize alternative fuels in power plants having fluid bed blocks. There is only one such a unit in Hungary, in the Bakony Power Plant Inc., in Ajka. A significant share of the hazardous wastes of the petroleum production and refinery (paraffinic press earth, malein acidic vessel residue, etc.) can be utilized by the so-called KALOREX process. This method is advantageous from environmental protection point of view not only for the MOL Rt but for the user and the region, too, because less flue gas, flying ash and cinders are formed and the emission of pollutant is reduced too, related to the pure coal firing.

AAPG Search and Discovery Article #90942©1997 AAPG International Conference and Exhibition, Vienna, Austria