Abstract: The invention relates to a method of and an apparatus for fermenting organic material in an apparatus comprising a container. The method includes the steps of feeding organic material and fermenting microbes (414) to a lower portion (410) of the container, whereby material already existing in the container (419, 421) moves upwards as a plug flow; fermenting the upwards moving material and generating gas from the fermenting; removing the generated gas and the fermented material from the an upper portion of the container, wherein the organic material and fermenting microbes in the lower portion (410) of the container are mixed by mixing equipment (412) arranged therein so that the mixing is cyclically stopped or slowed down and a liquid layer (415) is segregated from the mixed material to the bottom of the container; and the liquid layer is removed from the bottom of the container.

Abstract: A method and apparatus for treating pulp in connection with a blow tank or a storage tank. The pulp is discharged from a batch digester and fed either to the upper or the lower part of a blow tank, depending on the consistency of the pulp being discharged from the digester.

Abstract: A method and apparatus for treating pulp in connection with a blow tank or a storage tank. The pulp is discharged from a batch digester and fed either to the upper or the lower part of a blow tank, depending on the consistency of the pulp being discharged from the digester.

Abstract: A method and apparatus for treating pulp being fed into a blow tank or a storage tank. A preferred embodiment is that the pulp is discharged from a batch digester (10) and fed either to the upper or lower part of a blow tank (20), depending on the consistency of the pulp being discharged from the digester.

Abstract: Pulp is effectively and simply fed into a pulp tower using at least one feed pipe having a number of openings that are spaced different distances from the bottom of the pulp tower. The opening through which the pulp being fed into the tower flows automatically changes depending on the level of the existing pulp in the tower. The feed pipe may have a wide variety of different configurations with openings formed or shaped in different manners, and baffles or similar guides can be used to uniformly spread the pulp being fed through the feed pipe onto the top surface of the existing pulp without mixing. This configuration allows the amount of pulp pumping energy to be minimized while still effectively feeding pulp into a tower.

Abstract: Cellulose pulp is discharged from the dilution zone of a high consistency pulp tower at a substantially even volume flow and a substantially steady pulp consistency by mounting a particular parting member within a bottom portion of the tower. The parting member is constructed so as to define a first cross-sectional area between it and the tower side wall which is smaller than a second cross-sectional area below the parting member, in the dilution zone. The parting member may comprise a cone, cone frustum, pyramid, or pyramid frustum mounted substantially concentrically with the tower axis. The first cross-sectional area is at most 95% of a second cross-sectional flow area in the dilution zone, and typically about 90% or less. A ring may extend inwardly from the side wall at the parting member and define the first cross-sectional flow area with the parting member. Alternatively the parting member may itself comprise a ring having a substantially triangular (e.g.