determined by measuring the recycling depth. In order to determine the recycling depth, the recycled part of CFRP was removed with knife and the thickness of the remaining un-recycled part was measured. The recycled depth was calculated by subtracting the un-recycled thickness from the initial thickness (recycled depth = initial thickness - un-recycled thickness). The results of recycled depth at various solution concentration and applied current levels are shown in Fig.10. It can be seen that the higher concentration of NaCl solution did not accelerate the recycling as expected but retarded the process at all applied current levels.Moreover, at constant solution concentration, the higher applied current levels (I20 and I25) increased the recycling rate.However, considering the quality of recycled fibers, a current of 4 mA and electrolyte concentration of 3% are recommended as the best parameters for recycling purpose.The corresponding recycling rate (recycled depth/time duration) at these parameters was found to be 33 micro/day. However, in order to achieve a faster recycling rate, it is suggested that the parameters should further be optimised in future research.