The invention relates to a method for obtaining magnesium hydroxide from saline effluent, comprising an acidification and desorption step for the elimination of carbon species, and alkalinisation and basification steps for the purpose of precipitating the magnesium hydroxide.
The present invention relates to a catalyst comprising a noble metal, preferably palladium, incorporated on an indium oxide (In 2O3), which acts as an active catalytic support. The invention also relates to the production method thereof, and to the use of same in a method for the purification of contaminated water. Said catalyst is particularly suitable for removing nitrate (NO3), producing high nitrogen gas (N2) selectivity levels of close to 100% at high conversion values.
The invention relates to a set of hollow-fibre membranes woven into a mesh, and to the application thereof in membrane distillation processes for the treatment and/or desalinisation of fluids.
The invention relates to a method for the decoloration of aqueous solutions and/or effluents containing at least one organic dye from the following classes: anthraquinone, indigo, iminoquinone, nitroso and nitrated dyes, metal complex dyes, polyene dyes, and methine and polymethine dyes. The method of the invention involves catalytic hydrogenation reactions and comprises a step in which the effluent or solution is brought into contact with a catalyst comprising solid-supported noble metals and a reducing agent.
C02F 101/34 - Composés organiques contenant de l'oxygène
C02F 101/38 - Composés organiques contenant de l'azote
C02F 103/30 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'industrie textile
C02F 103/28 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant du traitement de plantes ou de parties de celles-ci provenant de l'industrie du papier ou de la cellulose
C02F 103/32 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'industrie alimentaire, p. ex. eaux résiduaires de brasseries
C02F 103/34 - Nature de l'eau, des eaux résiduaires ou des eaux ou boues d'égout à traiter provenant de l'industrie chimique non prévue dans les groupes
5.
SYSTEM FOR AUTOTHERMAL THERMOPHILIC AEROBIC DIGESTION, AND ASSOCIATED METHOD
The invention relates to a system for autothermal thermophilic aerobic digestion, for the hygienisation of sludge, which allows the non-treated sludge to be pre-heated in the digestion tank where the aerobic digestion of the sludge takes place under thermophilic conditions without any external energy input since it uses the residual heat present in the sludge that has already been treated in order to pre-heat the sludge before it is introduced into the digestion tank. The invention also relates to the method associated with said system.
The present invention relates to a method for treating, re-using and minimising industrial aqueous currents that have different osmotic pressures, using direct osmosis. The invention consists in putting in contact two currents having different osmotic pressures and separated by a semipermeable membrane. Owing to the osmotic pressure difference between the two currents, that having lower osmotic pressure transfers part of its liquid or solvent content to that having greater osmotic pressure. In this way, by direct osmosis, a concentrated current having lower osmotic pressure and a diluted current having greater osmotic pressure are obtained. Instead of the diluted current having greater osmotic pressure being again treated for the re-concentration thereof, this current can be directed to and used in an industrial process in which it is of use, given its properties.
The invention relates to a method for treating aqueous saline streams, in particular saline effluent, by means of membrane distillation with prior treatments, in order to eliminate total calcium hardness and permanent calcium hardness and the presence of sulphates in saline effluents, more specifically in waste brine from desalination plants. The system can be used to obtain a concentration of brine above 37 wt.-%, i.e. above saturation, allowing a considerable reduction in the volume of the brine and making it suitable for other industrial uses and for the production of pure water.
The invention relates to a bioelectrochemical system and method (1) for removing organic matter and nitrogen compounds from wastewater. Said system includes a plurality of biological batteries (2, 3) connected to one another, each respectively having: an anode chamber (2) configured to oxidize organic matter from wastewater, and a cathode chamber (3) configured to reduce nitrogen compounds in said waters. The biological batteries (2, 3) are connected to one another via a channel (12a, 12b) along which wastewater flows. Said system has two flow sections: a first section (12a) for oxidizing organic matter flowing through the plurality of anode chambers (2a, 2b, 2c, 2d, 2e, 2f) of each of the biological batteries (2. 3); and a second section (12b) for reducing nitrogenous compounds flowing through the plurality of cathode chambers (3a, 3b, 3c, 3d, 3e, 3f) of each of the biological batteries (2, 3).
The invention relates to a method for the remineralisation of fluids, in which final turbidity is controlled. The method includes steps comprising reagent dosing, remineralisation and filtration. More specifically, the invention relates to the treatment of water for human consumption, industrial processes, agricultural use and other uses that require the adjustment of parameters such as hardness, alkalinity, pH, Langelier saturation index (LSI), etc.
B01D 61/16 - Prétraitement du courant d'alimentation
C02F 1/68 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par addition de substances spécifiées, pour améliorer l'eau potable, p. ex. par addition d'oligo-éléments
C02F 1/44 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par dialyse, osmose ou osmose inverse
C02F 1/66 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par neutralisationAjustage du pH
C02F 103/08 - Eau de mer, p. ex. pour le dessalement
The invention relates to a brine treatment method consisting of the injection of a suitable dose of pre-determined reagents, followed by an extraction step for recovering the different agents obtained so that they can be re-used, while simultaneously rendering the brine suitable for other types of industrial processes, thereby offsetting part of the costs and the environmental impact of desalination plants.
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