Oil sludge wastes are generated in the processes of petroleum exploitation, storage, transportation and refining, and have been included in the list of hazardous wastes by most countries. A series of strict standards was formulated to limit the release of pollutants in hazardous waste in China. The firms will be subject to economic punishment or even legal sanctions if their discharge exceeds the limits. The treatment technologies of oil sludge, such as centrifugation, solvent extraction, biological treatment, pyrolysis and incineration, have some defects inevitably. Therefore the cooperative treatment of multiple technologies is a recent trend. Synergistic treatment of oil sludge by using the existing boiler in coal-fired power plant can achieve the goal of oil sludge reclamation, innocuity and reduction, and will not affect boiler operation status and efficiency due to the low proportion of oil sludge in co-combustion. Moreover, synergistic treatment of oil sludge by coal-fired power plant can rely on the existing boiler combustion system and flue gas treatment system in the power plant. So the costs of construction and operation will be much lower than professional incinerator for combustible hazardous waste. It is suggested that synergistic treatment of oil sludge by coal-fired power plant has obvious advantages.
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