Automatic and energy efficient dewatering unit for waste water treatment: SAV

Ulf Johansson, Stigebrandt Hydroteknik AB,

Sweden

1: Filling and thickening of sludge + polymers.

Reject water returns to cleaning plant.

2: Pressing out water with the membrane press

3: Emptying of dewatered sludge

Cycle time (fase 1-3): ca. 30-100 min.

Dewatering of sludge from various water treatment processes

SAV has very few moving parts no screens, filters that requires special cleaning or regular exchanges.

Significant reduction in electricity consumption 4 kWh/1000 kg DS = large CO2 savings

SAV works continuously in unattended installations. 24 hour automatic operation.

Extensive development in Sweden 1995-1999.

1999 SAV was patented internationally.

Kazakhmys and Stigebrandt both brings environmental benefits to the industry.

Together we are strong.