Treatment of oily wastewater using photocatalytic membrane reactors: A critical review. Issue 6 (December 2022)

• Record Type: Journal Article
• Authors: Samuel, Ojo; Othman, Mohd Hafiz Dzarfan; Kamaludin, Roziana; Kurniawan, Tonni Agustiono; Li, Tao; Dzinun, Hazlini; Imtiaz, Aniqa
• Is Part Of: Journal of environmental chemical engineering. Volume 10:Issue 6(2022)
• Publication Date: 2022-12
• Subjects: UV ultraviolet light -- Vis visible light -- API American petroleum institute separators -- PMRs photocatalytic membrane reactors -- PCRs photocatalytic reactors -- PAHs polycyclic aromatic hydrocarbons -- VOCs volatile organic compounds -- DNA deoxyribonucleic acid -- COD chemical oxygen demand -- BOD biological oxygen demand -- PTFE polytetrafluoroethylene -- PAN polyacrylonitrile -- OPW oilfield-produced water -- GCN carbon nitride -- FRR flux recovery ratio -- POME palm oil mill effluent -- MWCNT multi-walled carbon nanotube -- 2D two dimensions -- WCAs water contact angles -- OCA oil contact angle -- PVDF-HFP polyvinylidene fluoride-co-hexafluoro propylene -- CA-PEI catechol-polyethyleneimine -- TNM tubular nanofiber membrane -- TRL technological readiness level -- SEC specific energy consumption -- HRT hydraulic residence times -- TBL triple bottom line -- DPSIR driver- pressure-state-impact-response -- BAT best available technology -- LCA life cycle assessment -- EIA environmental impact assessment -- MOF metal-organic frame work -- AFM Atomic Force Microscopy -- CNT carbon nanotubes; Anti-Fouling and self-cleaning, Oily wastewater -- Physico-chemical treatment -- Photocatalytic membrane -- Advanced oxidation process; Chemical engineering -- Environmental aspects -- Periodicals; Environmental engineering -- Periodicals; Chemical engineering -- Environmental aspects; Environmental engineering; Periodicals; 660.0286
• DOI: 10.1016/j.jece.2022.108539
• Languages: English
• ISSNs: 2213-2929

Abstract

Abstract: Oily wastewater is generated from various sources such as oil/gas exploration (produced water), oil refining, pharmaceutical, food industries, and household waste. Toxins in oily wastewater often percolate into drinking water, seawater, and groundwater. This becomes a source of environmental and public health concern. Due to its hazardous nature, the discharge of oily wastewater into the environment is strictly regulated. This work critically reviews progress in photocatalytic membrane reactor (PMR) for oily wastewater treatment, regulations on allowable oil discharge, various factors that affect PMR performance, and its self-cleaning and anti-fouling properties in oily wastewater treatment. Their removal performance for stabilized oil emulsion and trace oil contaminants is highlighted. This work also evaluates trends of integrated techniques, utilization of functional materials, PMR scale-up and the outlook of PMR. It was evident from 226 published articles (1976–2022) that oily waste water contamination has been a source of concern and PMR which integrates both membrane filtration and photodegradation processes, has emerged as a promising technology for oily wastewater treament, simultaneously degrading oil emulsion and undertaking separation. The PMRs attained over 96% oil rejection. Both the UV and visible light aided the degradation of oil using the PMR. High membrane surface area, provides additional sites for the photocatalyst to occupy, contributing to an efficient degradation. Concludingly, PMRs can exhibit a high flux of recovery ratio after several filtration cycles under UV/Vis irradiation, and with proper design and fabrication methods, the membranes can do self-cleaning and be re-used for several cycles of filtration with high efficiency. Graphical Abstract: ga1 Highlights: Progress in photocatalytic membrane (PM) technology for oily wastewater was reviewed. Effects of oily wastewater on sustainability and regulatory framework were discussed. Modification with photocatalytic nanomaterial provides anti-fouling and self-cleaning. PM shows high flux recovery after several filtration cycles under UV Vis irradiation. With proper design and synthesis, PM can achieve high efficiency with self-cleaning.