Abstract:
La invencion provee un procedimiento para recuperar granos abrasivos aluminosos de entre materiales aglutinados, vítreos, hirviendo el material en una solucion acuosa de una base de metal alcalino.
Abstract:
Plant for treating urban refuse includes a cylindrical sterilisation and drying reactor with a central rotary shaft fitted with retractable blades. Retractable blades may also be disposed on the peripheral surface of the reactor. The blades turn over themass to facilitate and accelerate sterilisation and subsequent drying. On termination of the operation the blades are retracted so as not to obstruct the discharge of the mass. Drying is pref. carried out under vacuum in order to reduce treatment time.
Abstract:
A treatment apparatus capable of separating and recovering resins and metals, respectively, from an object being treated, which has resins and metals as its constituent, comprises a first gastight area (102), in which temperature and pressure are regulated so as to permit selective thermal decomposition of resins from the object (150) being treated, a second gastight area (103), which is partitioned from the first gastight area by an openable and closeable partition (105C) and in which temperature and pressure are regulated so as to permit selective gasification of metals from the object, first recovering means (111) connected to the first gastight area for recovering gases produced by thermal decomposition of resins, and second recovering means (115) connected to the second gastight area for recovering gasified metals.
Abstract:
A system and method for removing contamidated fluid from the ground in which water is pumped through a perforated pipe system into the ground to be decontaminated. The water and the contaminants are then drawn into a removal pipe system and to a treatment unit for separating the contaminants from the water before the latter is returned to the first perforated pipe system. According to an alternative embodiment the water is drawn into the removal pipe system by producing a high velocity stream of water using a venturi device and passing the stream over the upper end of the removal conduit. The vacuum created by the high velocity stream causes the water to flow into the removal conduit system.
Abstract:
The garbage chopping and sterilizing machine comprises a chopper unit (11) of the counter-rotating knive type and a hopper (10) for feeding trash to be processed. The chopper unit (11) is driven by a first gear motor assembly (14) and thereunder a garbage sterilization and withdrawal chamber (17) is provided comprising a trash processing and withdrawal auger (18) and a second gear motor assembly (19) for slowly rotating the auger (18), a duct-gate assembly (25, 26) being further provided for controllably feeding a steam flow in co-current relationship with the trash to be processed.
Abstract:
The present invention provides a process for oxidizing a contaminant in a permeable subterranean formation characterized by introducing an aqueous treating solution into the formation, the aqueous treating solution comprising 0.1% to 20% hydrogen peroxide and from 1 to 100 kilograms of a hydratable polymeric material per cubic metre of aqueous treating solution to provide sufficient viscosity to modify the distribution of the aqueous treating solution within the subterranean formation to provide sufficient hydrogen peroxide proximate to the contaminant to oxidize the contaminant to a less objectionable form yet minimize the distribution of hydrogen peroxide to portions of the subterranean formation free from the contaminant.
Abstract:
@ The present invention provides a process in which oxygen and nutrients are effectively supplied to biota for stimulating the biooxidation of a compound within a subterranean formation characterized by introducing an aqueous solution of hydrogen peroxide into the subterranean formation at at least one site, the 24-hour average concentration of the hydrogen peroxide initially introduced being between 0.0001% and 0.1% and increasing the 24-hour average concentration of hydrogen peroxide with time at a rate sufficient to provide a corresponding increase in oxygen available to the biota within the subterranean formation but without providing a toxic environment to the biota, and increasing intermittently the hydrogen peroxide concentration introduced into the formation for a short time sufficiently to be toxic to biota at or closely adjacent to the site of introduction thereof thereby removing the biota and thus increasing the permeability of the formation at or adjacent to the site of hydrogen peroxide introduction.
Abstract:
A method for treating municipal solid waste material in the presence of moisture for the separation and recovery of inorganic matter and organic matter wherein the waste material is fed into a pressure chamber and is agitated therein. The contents of the pressure chamber are subjected to heat under a pressure for a predetermined period of time to cook, sterilize and soften the organic matter contained therein. The moisture content ranging from about 60% to 70%. After releasing the pressure from the pressure chamber, the cooked waste material is removed and then separated and classified into various fractions thereof including an inorganic fraction and said fines of the organic fraction which have a residual moisture content ranging from approximately 60% to 70%.
Abstract:
Zur vollen Ausnützung für die Weiterverwertung von Müll, und zwecks Verhinderung einer vorzeitigen Verrottung desselben, wird dem Müll verrottungshemmendes Material zugeführt, welches aus Gasen, zB Ozon, Dämpfen von chemischen Mitteln, Imprägnierungs- oder Beschichtungs mitteln, bestehen kann. Diese Zuführung erfolgt bereits beim Einsammeln des Mülls und wird praktisch bei jedem Arbeitsgang oder jeder Lagerung erneut durchgeführt. Der Müll wird zu einem faserigen Endprodukt verarbeitet, das als technisch ver wendbarer Ersatzstoff dient.
Abstract:
The invention relates to a process for the recovery of raw materials from presorted collected waste, especially scrap electrochemical batteries and accumulators in which the scrap (10) is first mechanically prepared and divided into coarse and fine fractions (15, 16) which are further processed separately. Materials to be recovered are extracted by dissolution in steps by a first and a second solvent in a wet chemical preparation process from the fine fraction and then recovered individually from the two solutions.