Abstract: The present invention relates to a method and arrangement for the treatment of liquid material based on organic waste products, in particular sludge from sewage disposal plants and the like, wherein the sludge material is added and mixed with chemicals, in particular sulphuric acid, nitric acid, and/or ammonia, during the vaporization and degasification of liquid from the material to increase the solids content thereof.

Abstract: The present invention relates to a method and arrangement for the treatment of liquid material based on organic waste products, in particular sludge from sewage disposal plants and the like, wherein the sludge material is added and mixed with chemicals, in particular sulphuric acid, nitric acid, and/or ammonia, during the vaporization and degasification of liquid from the material to increase the solids content thereof.

Abstract: A continuous process for treating a liquid-containing organic waste material. Sufficient acid is added to the material to achieve a pH of 2 or less in the material. The material is subjected to a beating treatment sufficient to (a) reduce the viscosity of the material, and (b) by heat-generated by friction during the beating treatment and by heat generated by reaction of the acid with the material, raise the temperature of the material so that liquid in the material is vaporized to gases. Sufficient alkaline medium is added to the material such that the pH of the material is raised to at least 5.

Abstract: Liquid containing organic waste material and chemicals are continually introduced into the upper part of a vertical, cylindical treatment chamber. While sinking through the chamber, the material is beaten by fast rotating treating elements which also mix the material. The treating elements also move in axial direction to free vapors and gases from the material. Vapors and gases are removed from the top of the chamber.