System requirement 

- The ashes recycling system shall be able to extract different metals from ashes.

Physical requirements 

- In the column system, the rotator shall be able to mix the two phases well enough to transfer the metal ions from the aqueous phase to the organic phase.

- The mixer shall be able to dissolve all soluble in the ash.

Chemical requirements 

- The column system shall be able to transfer the metallic salts from the solution to the solvent.

- The column material shall be able to withstand the corrosion with acid.

- In the column system, the rotator shall be able to mix the two phases well enough to transfer the metal ions from the aqueous phase to the organic phase.

- In the column system, the solvent used shall be able to extract a specific ion from the solution (e.g., LIX® 984N for copper ions).

- The mixer shall be able to dissolve all soluble in the ash into the acid.

- The pipes shall be able to withstand the corrosion with acid.

- The valves shall be able to withstand the corrosion with acid.

- The mixer shall be able to withstand the corrosion with acid.

Mechanical requirements 

- The column shall be made of stainless.

- The mixer shall be rotate in 375 rpm in continuous and dispersed phase flow rate.

- The filter shall be able to avoid the solid particles to intel the column

- Time of soaking the ashes solution with acid shall be enough to dissolve all ashes in the acid solution.

- The material of pipes shall be made of PPR.

- The pumps shall be able to pump the liquids up to the column.

Automation requirements 

- The sensors shall be able to control from the GUI.

- The valves shall be able to control from the GUI.

 - The inflows and outflows of the fluids shall be able to harmonize with each other.