Oppdriftsløsning

Oppdriftsløsning refers to a method of treating wastewater, specifically sewage, where the primary separation of solids from liquids is achieved through buoyancy. This process is commonly implemented in septic tanks and similar settling systems. In an oppdriftsløsning, the wastewater enters a tank, and due to reduced flow velocity, heavier solids settle to the bottom as sludge, while lighter materials such as grease and oils float to the surface, forming a scum layer. The clarified liquid, known as effluent, then exits the tank for further treatment or disposal. The key principle is the difference in density between the solid particles and the water. Oppdriftsløsning is a passive process, relying on gravity and natural separation, and is a fundamental step in many decentralized wastewater treatment systems. It effectively removes a significant portion of suspended solids and organic matter, reducing the load on subsequent treatment stages. Regular removal of the accumulated sludge and scum is necessary to maintain the efficiency of the oppdriftsløsning system.