Patent ID: 8772020

Claim:
A fermentation system for production of biogas from solid organic material, said system comprising: a first fermentation reactor configured to produce a first biogas including: a vessel for housing a feed mixture having liquid and solid particles, the vessel containing an outlet port; a strainer assembly at the outlet port for filtering processed feed mixture from the vessel, the strainer assembly including: a strainer body having an inlet end fluidly connected to the vessel, service end, and drain opening intermediate the inlet end and service end; a mixture driving member positioned in the strainer body adjacent the drain opening, the mixture driving member having a driving surface configured to drive solid particles in the strainer body towards the inlet end and an upstream end configured to extend beyond the inlet end into the vessel; a filter member positioned in the drain opening configured to allow liquid effluent to pass therethrough and retain desired solid particles in the strainer body; and a drain pipe configured to receive the liquid passing through the filter member; and a second fermentation reactor in fluid communication with the first reactor, the second reactor configured to produce a second biogas, wherein the driving surface engages the filter member such that solid particles are driven from a surface of the filter member when the driving member is activated.