Embodiments of a slurry reactor and slurry mixer/contactor are shown and described. Each embodiment of the reactor includes a vessel for containing a liquid slurry or suspension of particles and microorganisms. In the inside of the vessel, generally along its centerline, is a vertical conduit...http://www.google.se/patents/US5744105?utm_source=gb-gplus-sharePatent US5744105 - Slurry reactor
