Rotary Press Revolutionizes Sludge Compaction

摘要

Optimization, cost reduction and mill sludge discharge are seldom combined as a topic of discussion, but evolution in technology has changed that. Dewatering sludge to form cake material with this design is proving to be an outstanding alternative to existing systems. With feed sludge or flow streams that can be as low as 0.7% total suspended solids, this upgrade to belt presses and screw presses produces a consistent extrusion of cake from all types of mill sludge. That includes recycled fiber sludge, combinations of fiber, filler and fines from primary capture sources and sludge from secondary biological treatment. When compared to equipment and operations currently in use, the rotary press reduces energy cost, decreases polymer cost, significantly cuts maintenance requirements and eliminates the need for operator attention during operation. Other benefits include a system that is free from the need for constant cleaning and is totally automated, from push button start to complete system monitoring and alarming. This paper discusses the technology, the successes and the benefits of a revolutionary rotary press technology for producing cake from sludge.