Abstract: Methods of enhancing anaerobic digestion of wastewater are provided. The methods comprise pressure oxidation of digester material to remove sulfide and/or regenerate iron. Also provided are a pressure oxidizer device and a wastewater treatment system having one or more of such devices. The methods, device, and system have application in treatment of municipal wastewater, wastewater of agricultural and livestock operations, and in biofuels production.

Abstract: Methods of enhancing anaerobic digestion of wastewater are provided. The methods comprise pressure oxidation of digester material to remove sulfide and/or regenerate iron. Also provided are a pressure oxidizer device and a wastewater treatment system having one or more of such devices. The methods, device, and system have application in treatment of municipal wastewater, wastewater of agricultural and livestock operations, and in biofuels production.

Abstract: Indeterminate length fiber tows ends are joined by overlapping end portions of the first and second fiber tows. The first and second tows are secured in a clamp with a portion of the overlapping area exposed. The overlapping area of the tows is positioned on a sewing unit having a support and sewing head, at least one of which is displaceable along first and second axes, and a controller for executing a preprogrammed stitching pattern. The controller is actuated to form the preprogrammed stitching pattern in the exposed portion of the overlapping area, thereby splicing the first and second fiber tows.