Are there any setups that have been designed for making biochar that could be used with egg shells, sea shells or limestone to make calcium oxide? I love the idea of converting my chicken egg shells to slaked lime and then using it to preserve fresh eggs. Not to mention all the other boss things you can do with it. I wasn't sure where to post this question so if you have a suggestion for a better place to post it let me know.
Here are my inspiration vids:
https://www.youtube.com/watch?v=jOxaOTUGuKo
https://www.youtube.com/watch?v=yUYgguMz1qI
.png)
