Andritz Rebuilds Sludge Screw Press at Stora Enso Anjala Mill

Andritz, Graz, Austria, has successfully completed the rebuild of a sludge screw press at Stora Enso’s Anjala paper mill in Anjalankoski, Finland. The turnkey upgrade of the sludge screw press, which has been out of operation for the past few years, included dismantling of the baskets and shaft, rebuild of the baskets with new screen plates, overhaul of the counter-pressure unit, supply of all parts needed for the overhaul, as well as erection of the unit. 

The upgraded press replaced an existing, outdated sludge dewatering unit. 

Prior to award of the order, intensive laboratory sludge tests were conducted by Andritz to check the suitability of the screw press for the dewatering capacity needed and the sludge to be processed. 

Stora Enso is a provider of renewable solutions in paper, packaging, biomaterials, and wooden structures on global markets. The group has some 26,000 employees in more than 35 countries. Anjala Mill belongs to Stora Enso’s Paper division and is one of Europe’s largest producers of book paper.