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 outlet of the press allows the operator to vary the degree of cake dryness in the final product. The unit has very few components and is designed for ease of maintenance and unattended operation. The totally enclosed design mitigates odors and allows the operator to avoid direct contact with the sludge. It can be equipped with a single dewatering channel or can be expanded up to eight 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