In order to reduce or eliminate the harm of sludge to environment and human health,and to realize its resource,energy or reuse,the harmless treatment technology of oil-bearing sludge in large-scale oil field is put forward.Firstly,in the pretreatment stage,the oily sludge was crushed and mixed evenly.The aim of crushing is to distribute the crude oil and water in the sludge as evenly as possible in each particle,and mixing is to mix the various components of the sludge together fully.Then,chemical oxidation treatment,activated carbon adsorption treatment,biological treatment,respectively,to reduce the oil sludge solid impurities,oil content,and organic matter content.Finally,the oily sludge after biological treatment was reduced and reused by advanced treatment methods,such as high temperature incineration.The results showed that the oil content of oily sludge decreased by 5.01%,the water content by 6.61% and the solid impurity by 6.00%.
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