Developers are usually one-shot. Dump them down the drain using plenty of water to dilute and wash it away.
However, check the manufacturer's instructions. Some are reusable and/or replenishable. If it is, save it. Otherwise, dump.
Developers are one shot only if they are diluted. Reusable developers include D-76, XTOL, ... if used as stock solutions. I prefer Kodak XTOL replenished for fine grain and smooth tonality. There are other developers that can be used replenished.
Pyros are one shot developers.
Warning!! Handling a Hasselblad can be harmful to your financial well being!
Nothing beats a great piece of glass!
I leave the digital work for the urologists and proctologists.