The rotary press from Fournier Industries uses two slowly rotating screens to create a 2-inch-wide channel that the sludge passes through as it dewaters. A pressure restrictor on the press outlet allows the operator to vary the degree of cake dryness in the final product. The unit has few components and is designed for ease of maintenance and unattended operation. The enclosed design mitigates odors and allows the operator to avoid direct contact with sludge. It can be equipped with a single dewatering channel or can be expanded up to six channels on a single machine. Septage can be treated to a cake dryness in the more than 30 percent range. 418-423-4241; www.rotary-press.com.