The rotary press from Fournier Industries uses two slowly rotating screens to create a 2-inch channel that sludge passes through as it dewaters. A pressure restrictor on the outlet allows the operator to vary final cake dryness. The unit has few components and is designed for ease of maintenance. The totally enclosed design mitigates odors and keeps the operator out of direct contact with the sludge. The system can be equipped with a single dewatering channel or expanded with up to six channels. 418/423-4241; www.rotary-press.com.