Abstract: This invention relates to a sewage sludge treatment system resulting in an oxygenated and/or ozonated treated sludge containing substantially no pathogens. The system includes apparatus and a process for mascerating raw sludge, adjusting the pH to about 2.5 to about 3, adjusting the solids content to about 2.5% to about 4%, adjusting the temperature, if necessary, to about 20.degree. C. to about 40.degree. C., mixing an oxygen-rich gas, such as oxygen and/or ozone with the sludge as the sludge is mixed or recirculated through a hyperbaric vessel and simultaneously injecting the oxygen-rich gas into a combination gas and sludge mixing and dispersing assembly in an upper portion of the hyperbaric vessel. Such injection causes mixing of the gas and sludge and dispersement of such mixture in a plurality of streams to atomize and oxygenate the sludge.

Abstract: This invention relates to apparatus for treating sewage sludge in a hyperbaric vessel in which the sludge is oxygenated by injecting an oxygen-rich gas into the sewage sludge and then dispersing the mixture of sludge and oxygen-rich gas into the upper portion of a hyperbaric vessel for further interaction with an oxygen-rich atmosphere. The oxygen-rich gas is injected into the sewage sludge by delivering the gas to a combination gas and sludge mixing and dispersing assembly. The gas and sludge are mixed within a plurality of channels formed in the assembly before the mixture is dispersed from the channels.

Abstract: The present invention relates to an apparatus for use in a sewage sludge treatment system comprising a hyperbaric vessel including sludge inlet means for conveying sludge to the vessel to be accumulated in a lower portion of the vessel, a sludge delivery means having a discharge end for delivering sludge particles from the lower portion to an upper portion of the vessel, oxygen inlet means for delivering oxygen to the upper portion of the vessel to oxygenate the sludge particles at a hyperatmospheric pressure therein, the oxygenated particles falling to and being collected in the lower portion of the vessel, gas outlet means for removing gas from the upper portion of the vessel, a sludge outlet means for rapidly removing the oxygenated sludge from the lower portion of the vessel using the pressurized oxygen as a propellant, the sludge outlet means comprising a discharge pipe connected to the lower portion of the vessel for conducting sludge to a separation apparatus, and a rapidly opening valve means controll

Abstract: Provided in an apparatus for sewage treatment is an improvement including, a recycling means for recycling gas from the upper portion of a vessel through a pumping means to pressurize the gas and into a second dispersing means, a second dispersing means comprising means for enabling a stream of pressurized gas from a plurality of gas dispersing nozzle assemblies to impinge upon a major portion of sludge being channeled from a first sludge dispersing means and to divide and disperse sludge particles within the upper portion of the vessel to become oxygenated as they interact with oxygen in the upper portion of the vessel, and to enable the oxygenated particles to fall to an to be collected in the lower portion of the vessel, each nozzle assembly directing a stream of the pressurized gas toward one outlet of a channeling means of the first dispersing means, the outlets of the first sludge dispersing means being arranged radially about the first sludge dispersing means, the nozzle assemblies being arranged radia

Abstract: The present invention relates to an apparatus for treating sewage sludge in which the sludge is conveyed to a vessel having an oxygen-rich atmosphere. The sludge is channelled through a first dispersing means to a plurality of second dispersing means by which it is dispersed throughout the oxygen-rich atmosphere where it is completely oxygenated. Preferably, the first dispersing means comprises separable components which define the channelling means. Preferably, the second dispersing means are aligned with the channelling means and either arranged around the inner periphery of the vessel, or attached to the first dispersing means.