Treatment and reclamation of hydrocarbon-bearing oily wastewater as a hazardous pollutant by different processes and technologies: a state-of-the-art review

Abstract

<jats:title>Abstract</jats:title> <jats:p>Hydrocarbon-containing oily wastewater generated by various industries creates a major environmental problem all over the world since petroleum products are commonly used as energy sources and raw materials in various industries. In case of offshore/coastal oil recovery operations, produced water is discharged through either shore side outfalls or coastal rim releases. In many cases, current disposal practices leads to severe environmental pollution by contamination of petroleum hydrocarbon to the surface, ground, and coastal waterways. Therefore, it is necessary to evaluate the performance of various processes for the recovery of petroleum hydrocarbons from wastewater. In this paper, a detailed review on the different separation/treatment processes of oily wastewater is presented. Previous and recent research works are reviewed in the area of oil-water separation from wastewater and also highlight the new developments in these areas. Various separation processes and technologies such as gravity separation, flotation process, membrane process, adsorption process, biological treatment, freeze/thaw process, and photocatalytic oxidation process (PoPs)/advanced oxidation processes (AoPs) are discussed and reviewed. The adsorption properties of a wide variety of porous sorbent materials in oily wastewater treatment, particularly in the area of oil spill cleanup, are also reviewed. The advantages and disadvantages of each process are critically discussed and compared.</jats:p>

Influence of diffuser design on selected operating variables for wastewater flotation systems: a review

“…This then results in different flotations under DiAFs based on the equipment used, i.e., jet flotation, impeller air flotation, disc/sparger air flotation and pump suction pipe air flotation (Lu et al 2016). Rubio et al (2002) and Kundu & Mishra (2018) discussed various types of flotation systems and different ways of bubble generation techniques and processes which show variations in bubble generation technology (see Table 1). Many researchers have modified the currently existing flotation processes whereas others have even given the flotation processes different names according to the notable features of the processes.…”

Fluorine-free and hydrophobic hexadecyltrimethoxysilane-TiO2 coated mesh for gravity-driven oil/water separation

“…[3,4] Therefore, how to effectively treat oily waste water, to achieve water reuse and oil recovery, and to protect the environment have received increasing attention from the state and the society. [5,6] Traditional technologies, such as gravity separation [7], skimming [8], sorption [9,10], and flotation [11] are beneficial for the separation of oil/water mixtures but they afflict with low efficiency and high operation cost.…”

The Prospects for Processing Reservoir Oil Sludge into Hydrocarbons by Low-Temperature Hydrogenation in Sorbing Electrochemical Matrices in Comparison with Conventional High-Temperature Hydrocracking

“…Previously, our research team has developed a detergent (hereinafter-polycomplexone) that is a mixture of sodium salts of iminodiacetate derivatives of tri-and diglycerides of fatty acids and polymucosaccharides [11], used for dispersing oil sludges and destructing sulphur-containing compounds and metal complexes in water-oil emulsions [12]. Low-sulphur, low-viscosity, medium-density oil with a low content of metals was extracted from them.…”