Dewatering and drying of sludge

Management of sludge produced in conventional activated sludge plants or in drinking water plants is a major problem, due to the huge daily amount of excess sludge. Treatment of excess sludge includes also, among others, its volume reduction before the final discharge and/or reuse.

Sludge Treatment Wetlands represent an ideal and economic solution for the on-site management of excess sludge at Wastewater Treatment Plants of municipalities, communities, companies etc.

The main benefits of Sludge Treatment Wetlands are the small investment, the minimum operation and maintenance cost, and the production of a final well composted and stabilized sludge material bio solids which can be exploited as fertilizer, soil amendment etc.

In contrast to the conventional mechanical methods (e.g. filter presses, centrifuges), energy consumption is minimum and takes place only for the sludge pumping. With Sludge Treatment Wetlands, the final sludge volume is reduced at a rate above 90%, with physical filtration which removes almost 100% of the total solids. After 8-12 years of operation, the solid content in the biosolids exceeds 50%, the biosolids are removed and a new feeding cycle begins.