Oily wastewater consists of fats, oils and greases together with a broad spectrum of dissolved organic and/or inorganic substances in suspension. It is regarded as one of the most hazardous wastewaters, causing serious environmental and health threats to the ecosystems, flora and fauna. The global increase in the discharge of oily wastewater coupled with stringent regulations for effluent discharge and incessant drive for re-use of treated wastewater necessitate the need for treatment of the wastewater. Conventional approaches employed in the past are inept for oily wastewater treatment due to low treatment efficiency and high operational costs, among others, hence the need for adoption of advanced technologies as promising alternatives to existing treatment systems for oily wastewater. Furthermore, the use of combined treatment processes is effective for the removal of hazardous pollutants present in high-strength oily wastewater. This review provides insights into advanced and emerging state-of-the-art technologies for safe and efficient treatment of industrial oily wastewater.

含油废水由脂肪、油和油脂以及各种悬浮的溶解有机和/或无机物质组成。它被认为是最危险的废水之一，对生态系统、动植物群造成严重的环境和健康威胁。全球含油废水排放量的增加，加上对废水排放的严格规定和对处理过的废水再利用的不断推动，需要对废水进行处理。过去采用的常规方法由于处理效率低和运营成本高等原因不适用于含油废水处理，因此需要采用先进技术作为现有含油废水处理系统的有前途的替代方案。此外，使用联合处理工艺可有效去除高浓度含油废水中存在的有害污染物。这篇综述提供了对安全有效处理工业含油废水的先进和新兴最先进技术的见解。