摘要:
The invention relates to a method for ultra-dehydrating thickened or pasty biomass products, in particular sludge from wastewater treatment plants, according to which the products, in particular products having a dryness of 4% to 25%, are subjected to the following steps: hydrothermal carbonization treatment, including pressurization (1, 2) and thermal conditioning (30) for a duration in a closed reactor (4); followed by dehydration of the products by a ram press (12), obtaining a dryness of more than 50%; the temperature of the product upstream from the ram press dehydration being regulated by cooling between 40° C. and 90° C., advantageously to around 70° C., in order to optimize the filterability in the piston press; the steps of the method being performed in a confined space making it possible to prevent the release of smells into the atmosphere.
摘要:
A method for biologically treating effluent involves pouring the effluent into a basin in which mobile supports are submerged for developing a biofilm and for carrying out a treatment by fixed fluidized bed, aerating the effluent in the basin with a distribution of air flow, from the bottom of the basin, according to a floor configuration, the aeration supplying air for treating the nutrients, and keeping the supports moving, regulating the aeration to modulate the air flow depending on at least one parameter taken from the following parameters: the residual oxygen concentration, and/or the concentration of oxygen and the concentration of N—NH4, and/or the permitted load; modifying the distribution of the air supply from the floor configuration to a spiral flow configuration when the operating conditions result in an air flow lower than a minimum air flow required to keep the mobile supports moving in the floor configuration.
摘要:
The invention is directed to an automatic backwash filter system that includes at least one influent port for introducing a fluid to the filter; a plurality of partitions forming a plurality of compartments for holding a filtering media for filtering the fluid; at least one porous plate for supporting the plurality of partitions; wherein each of the partitions is mounted atop a continuous portion of the porous plate; and at least one effluent port for draining the fluid away from the compartments. The filter may also include a filter media comprising one or more selected from the group consisting of sand, anthracite coal, and activated carbon. The invention also includes a method for preparing the automatic backwash filtering system that includes the steps of arranging a plurality of partitions to form a plurality of compartments for holding a filtering media for filtering a fluid; binding together a plurality of porous plates by a lap joint at least one of the partitions; and securing the plurality of partitions to the plurality of porous plates so that each of the partitions is mounted atop a continuous portion of the porous plate to prevent the filtering media from passing therethough. Each of the plurality of partitions may be secured to the porous plate with angles and mounting bolts.
摘要:
A compound consisting essentially of polylysine conjugated to non-charged residues and recognition signals wherein the free amino functions of said polylysine are substituted with non-charged residues and said recognition signals, which non-charged residues consist of gluconalactone and which recognition signals are at least one member of the group consisting of galactoside, mannoside, fucoside, Lewis.sup.x, Lewis.sup.b, oligomannoside, oligolactosamine saccharides and peptide ANP and said conjugated polylysine contains at least 30% unsubstituted free amino functions and a method of transfecting cultured cells.
摘要:
Combined apparatus for the biological purification of waste waters by means of activated sludges, which comprises at least two coupled clarification tanks which are in communication with an aerator tank as well as means for recycling the settled sludges coming from the clarification tanks into the aerator tank, characterized by the fact that the means for recycling the settled sludges consist of air pumps of the ''''air-lift'''' type which discharge into the aerator from each of the clarifiers and which are fed with air with a pulsating intermittent flow, alternating in each of the clarifiers, which causes a pulsating recirculation of the settled sludges, alternately from each of the clarifiers towards the aerator. The air-lifts are so developed that they have a base which is flared with respect to their top, said base constituting the orifice thereof for the drawing in of settled sludges which are to be recycled.
摘要:
Improved fluidizing apparatus adapted to separate continuously ion exchange resins having different densities in order to perform their selective classification according to suitable granulometric distributions. The apparatus comprises a first separation chamber and in the lower portion of this first separation chamber a second chamber coaxially thereto having a gradually increasing cross-section from the bottom to the top. This apparatus is notably applicable to a method of separation if ion exchange resins in movable-bed demineralizing installations in which the resins and their supporting fluid are introduced in the bottom of the second chamber in which they circulate upwards in the first chamber from which they are discharged in different zones depending on their densities.
摘要:
THIS INVENTION PROVIDES A METHOD OF REGENERATING ION EXCHANGE RESINS IN A FLUID BED, WHICH CONSISTS IN LOOSENING, ACTUALLY REGENERATING AND THEREAFTER RINSING THE REGENERATED ION EXCHANGE RESINS AS A CONTINUOUS PROCESS IN A SAME AND SINGLE ENCLOSURE, IN SUPERPOSED SUCCESSIVE ZONES THEREOF, BY POSSIBLY VARYING THE UPWARD SPEED OF THE LIQUIDS CIRCULATING IN EACH ONE OF SAID ZONES IN COUNTER-CURRENT RELATIONSHIP TO THE RESIN FLOW, AS A FUNCTION OF THE SPECIFIC ONE OF THE AFORESAID OPERATIONS WHICH IS BEING PERFORMED IN EACH ONE OF THE AFORESAID ZONES. THE INVENTION ALSO COMPRISES, AN APARATUS FOR CARRYING OUT THIS METHOD, WHICH COMPRISES A COLUMN IN WHICH THE SATURATED RESINS CIRCULATE BY GRAVITY FROM TOP TO BOTTOM WITH THE REGENERATING, WASHING AND RINSING LIQUIDS CIRCULATING IN COUNTER-CURRENT RELATIONSHIP TO THE RESINS.
摘要翻译:1280859离子交换再生DEGREMONT SOC GENERALE D'EPURATION ET D'ASSAINISSEMENT 1969年11月19日[1968年11月20日] 56635/69标题B1J在单级逆流再生和洗涤离子交换器时,液体流动被控制为 在再生完成之前防止树脂进入洗涤区。
摘要:
A pressure measuring and/or regulating device incorporating a movable solid body placed in a liquid-filled chamber. The body has a fluid-filled lower recess and has vertical surfaces directed upwards and/or downwards. One of these is a downwardly directed surface which is exposed to the fluid in the recess and another is an upwardly directed surface which is exposed to the liquid medium. The second surface is higher than the first and serves to correct for the Archimedean thrust applied to a third surface of this body which is directed downwardly, which is lower than the first and second surface, and which is exposed to the liquid.