Patent ID: 8663468

Claim:
A reactor for anaerobic purification of waste water, the reactor comprising: a reactor vessel having: at least one inlet for supplying waste water to be purified into the reactor; at least one outlet for discharging purified water; at least one sediment drain; and at least two differently configured multi-phase separator devices arranged on top of one another, an upper of said at least two multi-phase separator devices including a drain for discharging purified water leading into an upper region of the reactor vessel; a gas removal pipe; a biomass-pipe for returning biomass into a lower region of the reactor; and a separator vessel having a filling height substantially below an inlet of said drain from said upper multi-phase reactor, wherein an upper region of said separator vessel being connected with said gas removal pipe and a lowest part of said separator vessel leads into said biomass pipe, said drain for discharging purified water being located between said biomass pipe and said filling height.