Abstract: The present invention relates to an apparatus for extracting the inherent kinetic energy from water particles moving in substantially circular paths within waves. It comprises a coherent intake plane (1) extending continuously from the intake side (2) to the outtake side (3), along which intake plane the waves are to roll freely from the intake side (2) to the outtake side (3). A duct (5) includes an entrance portion connected to the plane (1) and directed substantially beneath the plane toward the intake side (2). The entrance portion defines a depression (4) into which the waves fall, breaking the water particles from their respective circular paths and causing them to flow in substantially the same direction in the duct (5) for delivery to an associated energy converter.

Abstract: In the preparation of homogeneous lime water solution for use in the purification of waste water, a lime water suspension is used as starting material. The lime water suspension is supplied at the bottom of a compartment in which it is caused to rise in order to leave at the upper part, while passing lamellas during its upward movement. The lamellas are arranged in such a way that they will create a sludge zone at their lower part in the compartment, in which zone the rising lime suspension is filtered, whereas they create at their upper part in the compartment a clarification zone in which fine particles are separated.