APPARATUS AND METHOD FOR ANAEROBIC TREATMENT OF WASTEWATER

摘要

The present invention relates to an apparatus and method for anaerobic treatment of wastewater. The apparatus comprises an upflow anaerobic reactor having an enclosed vessel with a top and a bottom, an influent liquid conduit located near the bottom of the vessel and an effluent liquid conduit located near the top of the vessel thereby establishing a flow direction through the vessel from the influent conduit to the effluent conduit. The vessel comprises a plurality of compartments, each of the plurality of compartments includes a plurality of carriers to which microorganisms are attached to each of the plurality of carriers, and wherein the plurality of carriers in an uppermost compartment having a diameter smaller than the diameter of the plurality of carriers in a lowermost compartment. The apparatus also comprises a recirculation line for re-circulating at least a portion of the wastewater back into the apparatus.