• Barkha Mishra
• Ajim Mollah

Industrial wastewater is both an environmental liability and a potential resource stream. This review highlights frontier chemistry-driven technologies that simultaneously enable pollutant degradation and resource recovery. Advanced oxidation processes (AOPs) such as Fenton, photo-Fenton, and ozonation, along with catalytic wet air oxidation (CWAO) and electrochemical treatments, are evaluated for their capacity to eliminate persistent pollutants and reclaim valuable metals. Industrial residues including red mud, sludge, and agricultural by-products are examined as low-cost precursors for catalysts and adsorbents, reinforcing circular waste-to-resource strategies. A central contribution of this work is the proposal of modular “reaction pods”—decentralized, skid-mounted treatment units that integrate photochemical, electrochemical, and adsorption modules with real-time pH/redox sensors and IoT-enabled control systems. Green solvent extraction methods, including deep eutectic solvents and hybrid chemico-biological approaches, are assessed for selective recovery of dyes, metals, and pharmaceuticals. Case studies from petrochemical, textile, and institutional wastewater highlight the applicability of these integrated packages. Finally, we present a vision for scaling through digital twin frameworks and industry–academia partnerships. Together, these advances outline a circular and scalable framework for industrial liquid waste management, grounded in sustainable chemistry and intelligent systems engineering.

Industrial liquid waste; Advanced oxidation processes; Resource recovery; Modular treatment pods; Circular economy; Digital twins

"Advanced Chemical and Hybrid Strategies for Industrial Wastewater Reuse: Catalysts, Modular Pods, and Smart Integration", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 9, page no.e639-e647, September-2025, Available :http://www.jetir.org/papers/JETIR2509473.pdf

"Advanced Chemical and Hybrid Strategies for Industrial Wastewater Reuse: Catalysts, Modular Pods, and Smart Integration", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 9, page no. ppe639-e647, September-2025, Available at : http://www.jetir.org/papers/JETIR2509473.pdf