Preparation and cleaning performance of compound cleaning agent for oily sludge

Cleaning agents play a very important role in the process of cleaning oily sludge, where the type, adding amount and compounding method all affect the effect of oily sludge cleaning. In this paper, alkaline inorganic salts, chemical surfactants and biosurfactants were screened through a series of experiments. Subsequently, the surface activity of the cleaning agents was analyzed by testing the surface tension of the solution, and the results of the screening were further verified. Finally, orthogonal experiments were used to determine the optimal preparation method of the compound cleaning agent, and its cleaning performance was verified through the experiment of oily sludge cleaning. The results showed that for the oily sludge in this paper, the optimal preparation method of compound cleaning agent was as follows: the addition amount of sodium dodecyl sulfate was 1.33%, the addition amount of sophorolipid was 0.17%, and the addition amount of sodium silicate was 2%. The cleaning effect of the compound cleaning agent was better, and the residual oil rate of oily sludge after cleaning was 1.83%, with a high oil removal rate of 87.55%.