Abrégé

Presented is an electric field intensity compensation method for constructing a non-uniform electric field through an auxiliary electrode, including steps of: in a matrix electrode unit, designing an auxiliary electrode arrangement position according to the spatial distribution of the pollutant concentration; designing the polarity of the auxiliary electrode according to the position relationship between the auxiliary electrode and matrix electrodes; and constructing a non-uniform electric field by the auxiliary electrode and the matrix electrodes to implement space compensation of the electric field intensity. In the present invention, a non-uniform electric field matching a pollutant concentration field is constructed by setting the space arrangement and polarity of the auxiliary electrodes on the basis of the matrix electrodes according to the spatial distribution of the pollutant concentration, the contradiction of consistency between the heterogeneity of the spatial distribution of the pollutants and the removal efficiency of the uniform electric field is solved, and the spatial difference of efficiency of electrokinetically remedying organic contaminated soil is avoided, thereby improving the overall space remediation efficiency of electrokinetic remediation.

Classes IPC  ?

• B09C 1/00 - Régénération de sols pollués
• B09C 1/08 - Régénération de sols pollués par des procédés chimiques
• B09C 1/10 - Régénération de sols pollués par des procédés microbiologiques ou utilisant des enzymes
• A01N 25/00 - Biocides, produits repoussant ou attirant les animaux nuisibles, ou régulateurs de croissance des végétaux, caractérisés par leurs formes, ingrédients inactifs ou modes d'applicationSubstances réduisant les effets nocifs des ingrédients actifs vis-à-vis d'organismes autres que les animaux nuisibles
• A01N 63/02 - Substances produites par, ou obtenues à partir de micro-organismes ou d'animaux
• C05G 3/04 - Mélanges d'un ou plusieurs engrais avec des produits n'ayant pas une activité spécifique d'engrais avec des conditionneurs de sol

Abrégé

The present invention relates to a potential difference-based diversion electrode arrangement and field intensity compensation method, comprising the following steps: the arrangement positions of paired diversion electrodes are determined according to the difference of potential around a position of field intensity to be compensated and the direction of an electric field line, and the paired diversion electrodes are inserted; and the field intensity enhancement rate of the position of field intensity to be compensated and the compensated field intensity value are calculated according to the difference of potential and arrangement positions of the paired diversion electrodes. In the present invention, the paired diversion electrodes are arranged in the direction of the electric field line by using the spatial difference of potential in the electric field, and the compensation of local field intensity is implemented, thereby beneficial to improving the overall efficiency of electrokinetic remediation for organic contaminated soil, and reducing the spatial difference of remediation efficiency.

Classes IPC  ?

• B09C 1/08 - Régénération de sols pollués par des procédés chimiques
• A01B 47/00 - Travail de la terre par application d'une différence de potentiel électrique entre les outils et le sol

Abrégé

The present invention relates to a field intensity compensation method of constructing a non-uniform electric field by means of an auxiliary electrode, comprising the following steps: designing a deployment position of an auxiliary electrode in a matrix electrode unit according to spatial distribution of pollutant concentration; designing the polarity of the auxiliary electrode according to a positional relation between the auxiliary electrode and matrix electrodes; and constructing a non-uniform electric field by means of the auxiliary electrode and the matrix electrodes, thereby implementing spatial compensation on intensity of the electric field. In the present invention, on the basis of matrix electrodes, the present invention constructs, a non-uniform electric field matching a pollutant concentration field is constructed by means of spatial deployment and polarity setting of an auxiliary electrode according to spatial distribution of pollutant concentration, thereby overcoming the contradiction between the heterogeneity of spatial distribution of pollutants and the removal efficiency consistency of a uniform electric field, and avoiding the spatial difference of electrokinetic remediation efficiency of organic contaminated soil, so that the overall spatial electrokinetic remediation efficiency is improved.

Classes IPC  ?

• B09C 1/08 - Régénération de sols pollués par des procédés chimiques

Abrégé

A potential difference-based current guide electrode arrangement and field strength compensation method comprises the following steps: determining arrangement positions of paired current guide electrodes according to potential differences around a position of field strength to be compensated and a direction of electric field lines; and calculating a field strength enhancement ratio of the position of field strength to be compensated and a field strength value after compensation according to the potential difference between the paired current guide electrodes and the arrangement positions thereof. By arranging paired current guide electrodes along the direction of electric field lines by using a spatial difference between potentials in an electric field, local field strength is compensated. The overall efficiency of electrokinetic remediation of organically contaminated soil is improved, and the spatial difference of remediation efficiency is reduced.

Classes IPC  ?

• B09C 1/08 - Régénération de sols pollués par des procédés chimiques

Abrégé

The present invention relates to the field of environmental protection and water treatment, and specifically to a method for removing Fe3+ acidity of acidic wastewater. In the present invention, a formate regeneration solution is cyclically used to transfer the alkalinity of lime/limestone so as to neutralize and remove Fe3+ acidity of acidic wastewater. By means of the present invention, the difficulty of neutralizing and removing Fe3+ acidity of acidic wastewater by using the alkalinity of lime/limestone is reduced, a highly pure and recyclable Fe3+ hydrolytic precipitate can be obtained, the yield and disposal difficulty of calcium-containing precipitated wastes are reduced, and the disposal difficulty of other pollutants in the acidic wastewater is reduced.

Classes IPC  ?

• C02F 1/66 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par neutralisationAjustage du pH
• C02F 1/64 - Composés des métaux lourds du fer ou du manganèse

Abrégé

Disclosed is a method for processing drinking water contaminated by nitrates using two-stage modified active sludge. Raw water is firstly sent to a first TiO2 modified denitrifying active sludge reactor (2), wherein a carbon source is added in a controlled amount, and nitrates are partly reduced with the production of an accumulation of nitrites; then the water is sent to a second TiO2 modified denitrifying active sludge reactor (3), wherein the carbon source and hydrogen are supplemented, and the remaining nitrates and the nitrites generated are reduced to nitrogen; the denitrified effluent is sent to a sedimentation tank (4), after having been subjected to an acid and alkali treatment, the precipitate containing TiO2 is injected into the first TiO2 modified denitrifying active sludge reactor (2) so as to form a recirculation of TiO2; after having been subjected to an ozone disinfection and an active carbon filtration, the effluent of the sedimention tank (4) has a suitable pH and a bicarbonate alkalinity, and the concentrations of the nitrates, nitrites and water-soluble organics meet the safety standard for drinking water. Also disclosed is a device for processing drinking water contaminated by nitrates using two-stage modified active sludge.

Classes IPC  ?

• C02F 3/34 - Traitement biologique de l'eau, des eaux résiduaires ou des eaux d'égout caractérisé par les micro-organismes utilisés
• C02F 3/28 - Procédés de digestion anaérobies

Abrégé

A safe utilization method for rice in a cadmium-polluted farmland comprises planting rice in the cadmium-polluted paddy field, and screening rejection-type rice varieties by using a cadmium limiting value of non-polluted rice specified in NY5115-2008, so as to obtain rice that can be safely produced in the cadmium-polluted paddy field.

Classes IPC  ?

• A01G 22/22 - Riz

Abrégé

A method for treating eutrophic water by using nitric acid and formic acid is provided. In order to treat eutrophic water and solve the problem of periodic outbreak of blue algae caused by eutrophic water, the nitric acid and the formic acid are added into the eutrophication water and/or the nitric acid is added into sediment interface of the eutrophic water with depth of 10-50 cm, wherein the water exchange is slow, the exogenous phosphorus pollution is controlled effectively while the endogenous phosphorus pollution is serious. The acid process in the water and the sediment improves the oxidation-reduction condition of the water-sediment interface, reduces the content of phosphorus in the water and the release strength of the sediment phosphorus, and further reduces the strength and frequency of outbreak of the blue algae and finally eliminates the outbreak condition of blue algae.

Classes IPC  ?

• C02F 1/66 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par neutralisationAjustage du pH

Abrégé

A method for synchronously removing heavy metal and nitrate in drinking water is provided. Micro molecular organic carbon including formic acid as the major component and acetic acid or ethanol as the minor component is added into raw water to be treated for acidizing so as to adjust pH to 5-3.9. The acidized water is passed through a heavy metal removing column (5) in the presence of oxygen, and heavy metal is removed by using fillings therein. The water, in which heavy metal is removed, enters into a denitrification reaction column (6) for removing nitrate in the water via synergistic effect of heterotrophic and autotrophic denitrification, wherein the micro molecular organic carbon without excessive additive amount is used as a carbon source and fillings in the denitrification reaction column (6) are used as an electron donor source. The residues in the water are filtered by aerobic circulation to obtain drinking water, from which heavy metal and nitrate are removed. An apparatus for carrying out the above method is also provided. In the method, heavy metal and nitrate in the raw water can be efficiently removed and the effluent is alkalescent.

Classes IPC  ?

• C02F 9/14 - Traitement en plusieurs étapes de l'eau, des eaux résiduaires ou des eaux d'égout une étape au moins étant un traitement biologique
• C02F 3/04 - Procédés aérobies utilisant des filtres lents
• C02F 1/62 - Composés des métaux lourds
• C02F 1/66 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par neutralisationAjustage du pH
• C02F 1/78 - Traitement de l'eau, des eaux résiduaires ou des eaux d'égout par oxydation au moyen d'ozone
• C02F 101/16 - Composés de l'azote, p. ex. ammoniac
• C02F 101/20 - Métaux lourds ou leurs composés

Abrégé

A system and a method for remediation of organic contaminated soil are provided, which comprises M*N electrodes to form an electrode matrix of symmetrical electric field structure. The field intensity is uniform in those points that are equidistant from each electrode in remediation area. The electrodes arrayed in mesh style in remediation area are carried out electrokinetic remediation. To exchange between positive polarity and negative polarity of the electrodes periodically is to make each electrode be a state of anode intermittently which has preferable remediation efficiency, by operation mode of reversing row/column electrode groups in manner of electrical scanning.

Classes IPC  ?

• B09C 1/08 - Régénération de sols pollués par des procédés chimiques
• G06F 1/26 - Alimentation en énergie électrique, p. ex. régulation à cet effet

Abrégé

A system and a method for remediation of organic contaminated soil are provided, which comprises M*N electrodes to form an electrode matrix of symmetrical electric field structure. The field intensity is uniform in those points that are equidistant from each electrode in remediation area. The electrodes arrayed in mesh style in remediation area are carried out electrokinetic remediation. To exchange between positive polarity and negative polarity of the electrodes periodically is to make each electrode be a state of anode intermittently which has preferable remediation efficiency, by operation mode of reversing row/column electrode groups in manner of electrical scanning.

Classes IPC  ?

• B09C 1/08 - Régénération de sols pollués par des procédés chimiques
• B09C 1/00 - Régénération de sols pollués
• B09C 1/10 - Régénération de sols pollués par des procédés microbiologiques ou utilisant des enzymes
• B01D 61/42 - ÉlectrodialyseÉlectro-osmose

Abrégé

A process for removing polymer and zooglea from crude oil comprises oxidizing-demulsifying crude oil for 10-25 minutes by stirring at a rate of 75-150 r/min under a temperature of 45-75 and adding a demulsifier at a concentration of 100-300 ppm, followed by three phases separation to remove polymer and zooglea from crude oil. The crude oil obtained from this process is easy to be electrically dehydrated.

Classes IPC  ?

• C10G 33/04 - Déshydratation ou désémulsification des huiles d'hydrocarbures par des moyens chimiques
• B01D 17/02 - Séparation de liquides non miscibles
• C09K 8/24 - Polymères

Abrégé

A microbial preparation for treating thick oil sewage and method for preparing the same. Said microbial preparation comprises, on basis of weight percent, 5~10% Pseudomonas aeruginosa, 10~15% Bacillus subtilis, 5~15% Bacillus licheniformis, 10~15% Propionibacterium freudenreichii, 10~20% Aureobacterium liquefaciens, 5~10% Bacillus circulans, 5~10% Curtobacterium flaccumfaciens, 5~10% Arthrobacter globiformis, 5~10% Clavibacter xyli, and 10~15% Anaerobaculum thermoterrenum. Said method comprises activating bacteria, shaking culture, proliferating, and mixing them.

Classes IPC  ?

• C12N 1/00 - Micro-organismes, p. ex. protozoairesCompositions les contenantProcédés de culture ou de conservation de micro-organismes, ou de compositions les contenantProcédés de préparation ou d'isolement d'une composition contenant un micro-organismeLeurs milieux de culture
• C12N 1/20 - BactériesLeurs milieux de culture
• C12N 1/26 - Procédés utilisant des hydrocarbures ou milieux de culture en contenant
• C02F 3/34 - Traitement biologique de l'eau, des eaux résiduaires ou des eaux d'égout caractérisé par les micro-organismes utilisés
• C12R 1/01 - Bactéries ou actinomycètes
• C12R 1/09 - Bacillus circulans
• C12R 1/10 - Bacillus licheniformis
• C12R 1/125 - Bacillus subtilis
• C12R 1/165 - Corynebacterium poinsettiae
• C12R 1/385 - Pseudomonas aeruginosa