178 greenhouse gas (GHG) balance. Depending on the final energy configuration and the volume of methane captured, total GHG emission reductions are estimated at approximately 40–60% relative to the reference state. A comparative summary is presented in Table 3. Table 3 – Comparison of energy and emission balance (before and after) Parameter Reference state (before) Transformation variant (after) Energy consumption 20 – 25 GWh/year 20 – 25 GWh/year Energy production from PV 0 5 – 10 GWh/year Energy production from methane 0 depending on variant (CHP) Covering demand with renewable energy and gas 0 % > 25 – 40% CO₂ emissions (indirect) 10 – 12 thousand tons/year 3 – 8 thousand tons/year CH₄ emissions to the atmosphere no control significantly limited Total GHG emission reduction - 40–60%* * indicative value, depending on the actual volume of captured methane and energy configuration. The implementation of the mineral recovery module transforms concentrated brine streams from a waste by-product into a potential source of valuable mineral resources. Under the adopted reference assumptions, the recovery potential is estimated at 20,000–40,000 tonnes of mineral salts per year. Recovered salts may be directed to industrial or technological applications, thereby reducing the volume of waste requiring disposal and contributing to circular economic objectives. This approach enhances the economic viability of the system while simultaneously reducing environmental burdens associated with brine management. The transformation of the facility from a passive post-mining liability into an active environmental and energy hub generates additional functional benefits. These include: ● partial retention of employment; ● utilization and adaptation of technical competencies of the mining staff to new operational areas; ● extension of the functional lifespan of mining infrastructure beyond 20 years. These effects contribute to stabilizing local socio-economic conditions during the transition process and align with the principles of a just transition in mining regions. The
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