Abstract
Oily sludge is the production and collection of a mixture of oil and sludge produced during crude oil processing. It contains crude oil, heavy metals, organic toxins, and harmful substances. It is characterized by high water content, poor fluidity, and large volume. Recycling and disposal have always been important aspects of environmental protection in the petroleum industry. Therefore, the safe treatment of oily sludge is particularly important. Hydrothermal oxidation technology is an emerging technology in which the treatment of oily sludge is comprehensive and without secondary pollution. This article describes the basic principles and research progress of wet oxidation and supercritical water oxidation and focuses on the latest experimental research, advantages and disadvantages, and development prospects in the treatment of oily wastewater.
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