Shades of "The Expanse" and "Silo" series. IIRC Wool, etc.. had people being decomposed right back into the farm area, and the Expanse has bodies being fed in

Shades of "The Expanse" and "Silo" series. IIRC Wool, etc.. had people being decomposed right back into the farm area, and the Expanse has bodies being fed into the "recycler".