The unique Salsnes Filter from Norway is a self-contained primary and secondary treatment system that is available at low capital cost. Suspended solids greater than 200 microns can be continuously removed as a comparatively dry sludge of 40% solids by weight. This will allow for ease of solids handling and disposal. With domestic sewage for example, 60-90% of the BOD is in the form of suspended solids.

Lackeby Products manufacture Heat Exchangers for sludge/water or sludge/sludge heating applications based on a modular principle with circular sludge channels. This means the design can be adapted to each wastewater treatment plants unique conditions. The channels provide a large throughput area that keeps pressure loss low and minimises the risk of clogging.