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Energy-Efficient Automatic Dewatering Unit for Wastewater Treatment

The SAV dewatering unit offers a revolutionary solution for waste water treatment with an automatic and energy-efficient design. Featuring a three-phase process including filling and thickening of sludge with polymers, pressing out water using a membrane press, and emptying of dewatered sludge, this system operates unattended. With a cycle time of 30-100 minutes, it significantly reduces electricity consumption to 4 kWh per 1000 kg of dry solids, leading to substantial CO2 savings. Patented in 1999, the SAV unit enhances environmental benefits in collaboration with Kazakhmys.

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Energy-Efficient Automatic Dewatering Unit for Wastewater Treatment

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  1. Automatic and energy efficient dewatering unit for waste water treatment: SAV Ulf Johansson, StigebrandtHydroteknik AB, Sweden

  2. 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.

  3. Dewatering of sludge from various water treatment processes Significant reduction in electricity consumption 4 kWh/1000 kg DS = large CO2 savings SAV works continuously in unattended installations. 24 hour automatic operation. SAV has very few moving parts no screens, filters that requires special cleaning or regular exchanges.

  4. 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.

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