Economic Benefits of Waste Pickling Solution Valorization

Area of Science:

• Chemical Engineering
• Environmental Science
• Materials Science

Background:

• Pickling processes generate waste streams requiring sustainable management.
• Traditional methods often lack efficient valorization and recycling capabilities.
• There is a pressing need for innovative solutions to improve sustainability in the pickling industry.

Purpose of the Study:

• To propose and evaluate an integrated hybrid membrane process for valorization and onsite recycling of pickling waste streams.
• To demonstrate the economic feasibility and environmental benefits of the developed process.
• To optimize the process performance through mathematical modeling and parameter analysis.

Main Methods:

• Integration of diffusion dialysis (DD), membrane distillation (MD), and a continuous stirred-tank reactor (CSTR) unit.
• Economic analysis including Net Present Value (NPV) and Discounted Payback Period (DPBP) calculations.
• Mathematical modeling using gPROMS for steady-state simulation and optimization.

Main Results:

• The integrated process shows economic viability with an NPV of approximately EUR 40,000 and a DPBP of 4 years.
• Optimization identified key parameters (bath concentration, DD/MD membrane areas) for improved performance.
• Simultaneous optimization of operating and design parameters balanced profitability and environmental impact.

Conclusions:

• The hybrid membrane process presents a promising solution for sustainable pickling waste stream management.
• Integration of new technologies can significantly benefit the pickling industry's sustainability challenges.
• The developed process offers a viable pathway for onsite recycling and valorization of industrial waste.