Abstract

Microemulsion cleaning method has been proved to be an effective way to clean oily sludge with low interfacial tension and high solubilizing ability for non-miscible liquids. In this paper, the percentage range of the microemulsion in the formulation was obtained by studying phase behavior of the microemulsion. The response surface method was used to model and optimize the microemulsion to obtain the best formulation: n-BuOH content at 9.89%, NaCl content at 2.24% and AES/APG ratio at 3.75, and the oil removal rate reached 97.28%. Meanwhile, the cleaning conditions of oil sludge were also optimized by the response surface method and the optimal cleaning parameters were determined as liquid-solid ratio at 4.2, stirring rate at 157 r·min⁻¹, and stirring time at 38 min. In addition, some experiments were carried out to confirm the simulation results, affording the oil removal rate of 98.79%. SEM and FTIR confirmed that the oil on the sludge can be removed by microemulsion.

摘要

事实证明，微乳液清洗法是一种清洁油性污泥的有效方法，它具有低的界面张力和对非混溶性液体的高溶解能力。在本文中，通过研究微乳液的相行为来获得制剂中微乳液的百分比范围。用响应面法对微乳液进行建模和优化，以获得最佳配方：正丁醇含量为9.89％，氯化钠含量为2.24％，AES / APG比为3.75，除油率达到97.28％。同时，还通过响应面法对油污的净化条件进行了优化，确定了最佳的净化参数为液固比为4.2，搅拌速度为157r·min ^-1。，搅拌时间为38分钟。此外，进行了一些实验以验证模拟结果，除油率达到98.79％。SEM和FTIR证实，污泥上的油可以通过微乳液除去。