REAKTOR ZUM ENTHÄRTEN UND/ODER AUFBEREITEN VON WASSER

摘要

An industrial water softener has an inlet and aeration zone with a compressed air feed. Aerated water flows to a de-gassing zone where compressed air and water with dissolved CO2 move in the same direction. CO2 is surrendered to the air and discharged. Sludge flakes are precipitated in a sedimentation zone, the upper side of which is in contact with the de-gassing zone and the lower side with the aeration zone. A rest zone is located under the sedimentation zone for the separation and abstraction of sludge and treated water. Also claimed is a suitable assembly in which hard water may also bear an organic load. The water moves in a circuit from the aeration to de-gassing and sedimentation zones, and is subjected to suitable air pressure in the aeration zone. The gas employed has low CO2 content to promote CO2 uptake from the water and causing precipitation of calcium and magnesium carbonate at a pH of pref. 7.5. Absorbed CO2 is released with air. Organically laden water is treated within 24 hr, and water is softened within 60 min.