Electrolytic recovery is normal in much of the industry, but AFAIK it destroys the fix. I have forgotten over all the years since I worked on this. Ulrich is right though, it must be carefully controlled to prevent evolution of unwanted gases.
Saw Dan's post after this went up. He is totally correct. KI added to the fix will precipitate out most all silver salts and complexes as Silver Iodide.
Sounds like it isn't so simple after all. Oh well. I had assumed the fix would be dead after silver recovery. Didn't plan on hearing about evolving oxygen and hydrogen.