Series R31 paddle aerator attachments for sludge drying and aeration of compost windrows from Brown Bear Corporation can be used for accelerated drying of all types of potable water and wastewater biosolids, hydrocarbon-petrochemical biosolids, industrial and mining waste, and for aeration of compost windrows. The 31-inch-diameter aerator provides a mechanical solution for accelerated air drying on pads and in drying beds, forming windrows, blending bulking agents or additives, pulverizing and aerating or water mixing for aerobic windrow composting. The rapid handling rate exposes the material to oxygen so noxious odors are minimized. It attaches to high-flow skid-steers and compact track loaders, and can be used with flows up to 50 gpm and pressures up to 5,500 psi. It is available with a universal skid-steer hitch and in either 8- or 10-foot widths. 641/322-4220; www.brownbearcorp.com.