Abstract: A cutter head assembly attachable to a boom of an excavating machine. The cutter head assembly includes a frame and a cylindrical cutter drum under the frame and attached to the frame through a pair of motors and a pair of torque converters. A mounting bracket is provided on the top of the frame for attachment of the frame to the boom of an excavating machine. The cylindrical cutter drum has longitudinal cutter bars with teeth spaced along the length of the cutter bars. The torque converters are attached to the cutter drum with a pair of hub adapters. Resilient grommets are located between the hub adapters and the cutter drum to absorb shock occurring when the cutter drum strikes a hard surface or object. A supply pipe is mounted to the top of the frame to receive a solidifying agent, such as dry cement, for solidifying liquid waste. Four distribution pipes are connected to the supply pipe and extend downward through the frame to distribute the solidifying agent over the top of the cylindrical cutter drum.