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Oily wastewater is a common wide range of large industrial wastewater , such as the mining and processing of oil transportation , electrical and mechanical processing, petrochemical and other industries emit large amounts of oily waste water every day , seriously endangering the safety of the water environment . Of oily wastewater treatment methods are mainly cloth float on air , dissolved air on the float , float on electrolysis , coagulation , filtration , biological method. Studies have shown that the surface under the action of loess in water softening , soil physical and mechanical properties of the water showing a clear rationale regularity , loess has some oil on the water adsorption, can handle oily wastewater . If by a certain method to improve soil nature , can improve the penetration rate and the treatment effect by changing external conditions such as pH , temperature, salinity , etc., or by adding a surfactant , such as changing the permeation rate of the materials , the treatment effect can be enhanced . This paper studies the surface loess of oily wastewater treatment effect by changing the external ambient temperature and pH to study the effect of oily wastewater to determine the optimal temperature and pH , and then the temperature and pH value by changing soil salinity , changing Malan loess soil permeability to study the treatment effect of oily wastewater . Then , and by adding a surfactant on the surface effect of loess oily wastewater treatment has been studied and found that adding a cationic surfactant and anionic surfactants are making their treatment effect is enhanced.
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