1. Treatment of petroleum industry wastewater: current practices and perspectives 2. Chemistry of petroleum wastewater 3. Concomitant degradation of petroleum products and microplastics in industrial wastewater using genetically modified microorganisms 4. Constraints and advantages of bacterial bioremediation of petroleum wastewater by pure and mixed culture 5. Prospects of green technology in the management of refinery wastewater: application of biofilms 6. Algal bioremediation versus conventional wastewater treatment 7. Application of microalgae in wastewater treatment: simultaneous nutrient removal and carbon dioxide bio-fixation for biofuel feedstock production 8. Membrane-based treatment of petroleum wastewater 9. Management of petroleum wastewater: comparative evaluation of modern and traditional techniques 10. Nanocomposite material-based catalyst, adsorbent, and membranes for petroleum wastewater treatment 11. Treatment of petroleum wastewater using solar power-based photocatalysis 12. Electrochemical treatment of petroleum wastewater: standalone and integrated processes 13. The viable role of activated carbon for the effective remediation of refinery and petrochemical wastewaters 14. Life-cycle assessment and cost-benefit analysis of petroleum industry wastewater treatment 15. Sustainability of wastewater treatment 16. Circular economy in petroleum industries: implementing Water Closed Loop System