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31 results about "Selenium pollution" patented technology
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In high concentrations, selenium acts as an environmental contaminant. Sources of pollution include waste materials from certain mining, agricultural, petrochemical, and industrial manufacturing operations. In Belews Lake North Carolina, 19 species of fish were eliminated from the lake due to 150-200 μg Se/L wastewater discharged from 1974 to 1986 from a Duke Energy coal-fired power plant. At the Kesterson National Wildlife Refuge in California, thousands of fish and waterbirds were poisoned by selenium in agricultural irrigation drainage.
Solid coated slow release selenium fertilizer and its preparation method
InactiveCN102515944AStable and fully absorbed and utilizedReduce the risk of contaminationOrganic fertilisersLayered/coated fertilisersCoprecipitationCore shell
The invention discloses a solid coated slow release selenium fertilizer, which comprises selenium fertilizer particles, and is characterized in that the selenium fertilizer particles possess a core-shell structure, the core of the selenium fertilizer particles is a selenium-containing fertilizer core, the shell of the selenium fertilizer particles is a coating wrapped outside the selenium-containing fertilizer core. The slow release selenium fertilizer reduces the conditions that available selenium in soil is absorbed by other minerals or fixed by coprecipitation, possesses obvious slow release characteristics, enables selenium to be stably and fully absorbed and utilized by plants, reduces non bio-available selenium in soil and can effectively mitigate the risk of selenium pollution.
Owner:SUZHOU SETEK
Method for culturing pleurotus geesteranus uniformly rich in selenium by using mixed selenium source
InactiveCN102150555ADifferent releaseAchieve stabilityHorticultureFertilizer mixturesYeastSodium selenate
The invention discloses a method for culturing pleurotus geesteranus uniformly rich in selenium by using a mixed selenium source. The method is characterized by comprising steps of: mixing selenium-enriched culture material additive in an amount which is 1 to 10 percent of the total weight of a dry culture material in the dry culture material, and culturing according to the common culture method to obtain the pleurotus geesteranus uniformly rich in selenium, wherein the selenium-enriched culture material additive has the total selenium content of 5 to 300mg / kg; the particles with the particle size of 0.005 to 5.0mm in the selenium-enriched culture material additive are in multi-particle-size regional distribution, and particles with the particle size of 1.0 to 5.0mm at least account for 10 percent of the total weight of the additive; particles with the particle size of 0.005 to 0.1mm at least account for 40 percent of the total weight of the additive; the mixed selenium source is a mixture of an organic selenium source and an inorganic selenium source; the inorganic selenium source is one or a combination of two of sodium selenate and sodium selenite; and the organic selenium source is selenious yeast. The pleurotus geesteranus prepared by the method has high utilization rate and stable selenium content in different batches; in addition, by the method, selenium pollution is avoided, and the method is easy to operate and easy to promote.
Owner:SUZHOU SETEK
Method for culturing pleurotus geesteranus uniformly rich in selenium by using selenium-enriched crop stalks
InactiveCN102150557AAchieve stabilityHigh Selenium UtilizationHorticultureFertilizer mixturesSelenium pollutionSe element
The invention discloses a method for culturing pleurotus geesteranus uniformly rich in selenium by using selenium-enriched crop stalks. The method is characterized by comprising the steps of: mixing selenium-enriched culture material additive in an amount which is 1 to 10 percent of the total weight of a dry culture material in the dry culture material, and culturing according to the common culture method to obtain the pleurotus geesteranus uniformly rich in selenium, wherein the selenium-enriched culture material additive has the total selenium content of 5 to 50mg / kg; the particles with theparticle size of 0.005 to 5.0mm in the selenium-enriched culture material additive are in multi-particle-size regional distribution, and particles with the particle size of 1.0 to 5.0mm at least account for 10 percent of the total weight of the additive; particles with the particle size of 0.005 to 0.1mm at least account for 40 percent of the total weight of the additive; and the selenium-enriched culture material additive comprises the following components in percentage by weight: 30 to 70 percent of selenium-enriched wheat stalk powder and 30 to 70 percent of selenium-enriched cornstalk powder. The pleurotus geesteranus prepared by the method has high utilization rate and stable selenium content in different batches; in addition, by the method, selenium pollution is avoided, and the method is easy to operate and easy to promote.
Owner:安徽硒谷生物科技有限公司
Method for carrying out rich-selenium culturing of plelmtus eqngiu by utilizing sodium selenite
InactiveCN102165894ADifferent releaseAchieve stabilityHorticultureFertilizer mixturesSodium HydroseleniteSodium selenate
The invention discloses a method for carrying out rich-selenium culturing of plelmtus eqngiu by utilizing sodium selenite. The method provided by the invention is characterized by comprising the following steps: mixing a rich- selenium culturing material additive the weight of which accounts for 1-10% of the total weight of a culturing dry material into the culturing dry material; culturing according to a common culturing method, thus obtaining rich-selenium plelmtus eqngiu, wherein the content of the selenium in the rich- selenium culturing material additive is 0.5-100mg / kg, the numerical values of the particle sizes of the particles of the rich-selenium culturing material additive are distributed in multiple different numerical vaue intervals within a range from 0.005mm to 5.0mm, the particles with the particle size of 1.0-5.0mm accounts for 10wt% of the total additive, and the particles with the particle size of 0.005-0.1mm at least accounts for 40wt% of the total additive; and the rich-selenium culturing material additive is prepared from the following raw materials in parts by weight: 100 parts of corn cob powder and 0.0011-0.022 part of sodium selenite. The plelmtus eqngiu cultured by the method has the advantages of high selenium utilization ratio and stable selenium content in batches; and the method ensures no hidden selenium contamination trouble and is convenient to operate and easy to popularize.
Owner:SUZHOU SETEK
Method for cultivating oyster mushroom uniformly rich in selenium with sodium selenite as selenium source
InactiveCN102150559ADifferent releaseAchieve stabilityHorticultureFertilizer mixturesAnimal scienceOyster
The invention discloses a method for cultivating oyster mushroom uniformly rich in selenium with sodium selenite as the selenium source. The method is characterized in that the method comprises the steps of mixing selenium-rich cultivating material additive accounting for 1-10 percent of the total weight of dried cultivating material into the dried cultivating material, and cultivating oyster mushroom according to an ordinary cultivation method to obtain oyster mushroom uniformly rich in selenium; the selenium-rich cultivating material additive has a total selenium content of 5-500 mg / kg, the grain sizes of the particles in the selenium-rich cultivating material additive are in the range of 0.005-5.0 mm with multi-grain-size regional distribution, the particles having a grain size of 1.0-5.0 mm account for at least 10 percent of the total weight of the additive, while the particles having a grain size of 0.005-0.1 mm account for at least 40 percent of the total weight of the additive; according to the respective parts by weight portions, the raw materials of components used in the selenium-rich cultivating material additive comprise 100 portions of cotton shells and 0.0011-0.11 portion of sodium selenite. The method has the advantages that the selenium utilization factor in oyster mushroom is high, and the selenium content in different batches of oyster mushroom is stable; besides, the method has no potential danger of selenium pollution, is convenient to operate, and easy to promote.
Owner:SUZHOU SETEK
Method for carrying out uniform selenium-enriched cultivation of pleurotus geesteranus by using selenium yeast
ActiveCN102177809AGood selenium enrichment effectHigh content of organic seleniumHorticultureFertilizer mixturesAnimal scienceSelenium pollution
The invention discloses a method for carrying out uniform selenium-enriched cultivation of pleurotus geesteranus by using selenium yeast, which is characterized by comprising steps of mixing a selenium-enriched cultivation material additive of which the weight is 1-10 percent of the total weight of a cultivation drier into the cultivation drier and carrying out cultivation according to a common cultivation method to obtain the uniform selenium-enriched pleurotus geesteranus, wherein the total content of selenium in the selenium-enriched cultivation material additive is in the range of 5-200mg / kg; the diameters of particles in the selenium-enriched cultivation material additive are distributed in a multiple diameter region mode in the range of 0.005-5.0mm; the weight of the particles with the diameter in the range of 1.0-5.0mm is at least 10 percent of the total weight of the additive; the weight of the particles with the diameter in the range of 0.005-0.1mm is at least 40 percent of the total weight of the additive; and the selenium-enriched cultivation material additive comprises the following composition raw materials in parts by weight: 100 parts of maize cob meal and 0.45-18 parts of selenium yeast. The pleurotus geesteranus obtained by using the method has high selenium utilization rate and stable selenium content between batches. Moreover, the method has no hidden dangerof selenium pollution and is convenient to operate and easy to popularize.
Owner:宁夏硒产业发展有限责任公司
Method for decreasing methyl mercury content in rice
InactiveCN105052646ALower levels of methylmercuryReduced bioavailabilityRice cultivationSulfide generationSulphate reduction
The invention relates to a method for decreasing methyl mercury content in rice. The method comprises the steps that on the condition of planting rice in a flooded mode, inorganic selenium salt or a mixture of inorganic selenium and sulfate is applied to soil at least 20 days before the rice is planted to decrease the methyl mercury content in rice, wherein in terms of total selenium, the content of the inorganic selenium salt in per kg of soil is 2-3 mg, and the content of the sulfate is 2 times that of the sulfate in soil. According to the method, on the condition that the rice is planted in the flooded mode, inorganic selenium and inorganic mercury are mainly utilized for forming inert mercury on the anaerobic condition to decrease the methyl mercury content in soil; meanwhile, sulfate reduction causes sulfide generation, the bio availability of methyl mercury in soil can be decreased to a certain degree, and then the methyl mercury content in rice is decreased. In order to avoid potential soil selenium pollution risk caused by high selenium using amount, the total selenium applying amount is not larger than 2-3 mg / kg in the method.
Owner:NANJING UNIV +1
Cultivation method for organic selenium-rich edible or tea water lilies
InactiveCN110012807APromote absorptionImprove the conversion efficiency of organic seleniumFlowers cultivationFertilising methodsWater lilyWater level
The invention discloses a cultivation method for organic selenium-rich edible or tea water lilies, and belongs to the technical field of aquatic plant cultivation. According to the method, the varietyof the water lilies is selected, cultivation patterns, including direct pond culture sinking and pot culture sinking, are realized through a planting pond and a pot culture container, selenium-rich bio-organic fertilizer and soil are optimally blended to be applied into the planting pond and the pot culture container, and the organic selenium-rich edible or tea water lilies are cultivated throughfurther water level control, topdressing, maintenance and management. The cultivation method has the advantages that the pure-natural organic selenium-rich edible or tea water lilies are obtained ina simple, convenient and efficient way, the eating and tea making value of the water lilies is increased, and the problems of existing cultivation methods, including proneness to selenium pollution, large cultivation workload, high cost and low working efficiency are solved.
Owner:GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
Comprehensive treatment method and device for Se-containing wastewater
ActiveCN108069562AReduce processing costsHigh removal rateWater treatment parameter controlWater contaminantsFlue gasSelenate ion
The invention relates to a comprehensive treatment method and device for Se-containing wastewater. Two stages of reactors are adopted, the Se-containing wastewater enters a second reactor firstly andis subjected to a reaction with sulfur-containing flue gas, SO2 in the flue gas is removed, and purified gas is discharged; effluent of the second reactor enters an anaerobic reactor, and selenate ions in the wastewater are reduced into selenite ions; effluent of the anaerobic reactor returns to a first reactor and is subjected to a reaction with the flue gas, and the selenite ions are removed; effluent of the first reactor enters an aerobic reactor, and effluent of the aerobic reactor is subjected to flocculating sedimentation, solid-liquid separation is performed, and a product is discharged. The Se-containing wastewater is treated by the sulfur-containing flue gas, so that the Se-containing wastewater and the sulfur-containing flue gas are treated efficiently simultaneously, waste is treated by waste, treatment cost of the Se-containing wastewater is reduced, the removal rate for Se pollutants in the wastewater is higher than 95%, and content of SO2 in the sulfur-containing flue gasis lower than 20 mg / L.
Owner:FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
Organic chelate selenium fertilizer synergist and preparation method and application thereof
ActiveCN108503469ALow toxicityIncrease profitFertilising methodsOrganic fertilisersWater insolubleInorganic selenium
The invention relates to an organic chelate selenium fertilizer synergist which is prepared from poly-aspartate, organic chelate zinc and organic chelate selenium in a weight ratio of (5-1):(5-20):(3-14), preferably (8-12):(10-15):(6-10). The invention also relates to a method for preparing the synergist, and a fertilizer containing the synergist. According to the invention, inorganic selenium isseparated from organic selenium by ethanol, so as to ensure the content of organic selenium in the fertilizer, and effectively prevent the problem that water insoluble matter is produced by slow chelating of inorganic selenium and poly-aspartate at normal temperature. After the organic chelate selenium is added to the fertilizer, the fertilizer can achieve a non-toxic standard, and after the prepared selenium-containing fertilizer is applied to soil, the residual amount is extremely low, and selenium pollution cannot be caused to the soil, and therefore, the synergist disclosed by the invention can be directly used for single fertilizers and compound fertilizes, and is wide in application scope.
Owner:CHONGQING JIANFENG INDAL GROUP
A comprehensive treatment method and device for selenium-containing wastewater
ActiveCN108069562BReduce processing costsHigh removal rateWater treatment parameter controlWater contaminantsSelenious AcidFlue gas
The invention relates to a comprehensive treatment method and device for Se-containing wastewater. Two stages of reactors are adopted, the Se-containing wastewater enters a second reactor firstly andis subjected to a reaction with sulfur-containing flue gas, SO2 in the flue gas is removed, and purified gas is discharged; effluent of the second reactor enters an anaerobic reactor, and selenate ions in the wastewater are reduced into selenite ions; effluent of the anaerobic reactor returns to a first reactor and is subjected to a reaction with the flue gas, and the selenite ions are removed; effluent of the first reactor enters an aerobic reactor, and effluent of the aerobic reactor is subjected to flocculating sedimentation, solid-liquid separation is performed, and a product is discharged. The Se-containing wastewater is treated by the sulfur-containing flue gas, so that the Se-containing wastewater and the sulfur-containing flue gas are treated efficiently simultaneously, waste is treated by waste, treatment cost of the Se-containing wastewater is reduced, the removal rate for Se pollutants in the wastewater is higher than 95%, and content of SO2 in the sulfur-containing flue gasis lower than 20 mg / L.
Owner:FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
Plant source liquid reinforcer for repairing selenium-contaminated soil and application thereof
PendingCN113355098AImprove adsorption capacityImprove enrichment capacityContaminated soil reclamationOrganic fertilisersSoil scienceHyperaccumulator
The invention discloses a plant source liquid reinforcer for repairing selenium-contaminated soil. The reinforcer is obtained by mixing cardamine hirsute extract, alfalfa extract and water according to the mass ratio of (0.05-5): (1-30): (100-3000). Meanwhile, the invention also discloses an application of the reinforcer in repairing the selenium-contaminated soil, and the application is that the reinforcer is sprayed on the soil where the hyperaccumulators are planted in the flowering period of the hyperaccumulators. The plant source liquid reinforcer for repairing the selenium-contaminated soil is extracted from plants, is environmentally friendly and safe, does not cause secondary pollution to the soil, and can enhance the adsorption and enrichment effects of hyperaccumulators on selenium in the soil when being sprayed on the soil in the flowering period of the hyperaccumulators.
Owner:SHAANXI SCI TECH UNIV
Treatment method and device for synchronously removing selenium pollution and sulfide pollution
ActiveCN112159049ACarbon savingShort reaction timeWater treatment parameter controlWater contaminantsSelenious AcidSulfide
The invention discloses a treatment method and device for synchronously removing selenium pollution and sulfide pollution, and belongs to the technical field of environment-friendly wastewater treatment. The treatment method for synchronously removing selenium pollution and sulfide pollution comprises the following steps: reducing selenate ions (SeO4<2->) in wastewater into selenite ions (SeO3<2->) in an anaerobic bioreactor; using an intermediate collecting device to collect the reacted selenium-containing wastewater after the selenium-containing wastewater passes through a membrane; using apH adjusting device to adjust the pH of the selenium-containing wastewater after reaction; introducing the selenium-containing wastewater with the adjusted pH into a reaction device to react with sulfide-containing wastewater so as to remove selenium and sulfur pollutants synchronously; and collecting reacted wastewater by a final collecting device. According to the method, the sulfide-containingwastewater can be used for treating the selenium-containing wastewater, the purpose of treating waste with waste is achieved, the removal rate of selenium and sulfur is high, carbon source consumptionis low, and the operation is easy and convenient.
Owner:ZHEJIANG UNIV
Method for carrying out uniform selenium-enriched cultivation of pleurotus geesteranus by using selenium yeast
ActiveCN102177809BDifferent releaseAchieve stabilityHorticultureFertilizer mixturesAnimal scienceSelenium pollution
Owner:宁夏硒产业发展有限责任公司
Treatment method for SO2-containing flue gas and treatment device
ActiveCN108067090AImprove economic efficiencyReduce processing loadWater contaminantsDispersed particle separationChemistryPollutant
The invention relates to a treatment method for SO2-containing flue gas and a treatment device. A double-section flue gas desulfurization reactor is adopted, the flue gas enters the first-section reactor and is subjected to a reaction with Se-containing wastewater discharged by an acidification reactor, and selenite ions are removed; the flue gas enters the second-section reactor and is directly subjected to a reaction with the Se-containing wastewater, SO2 in the flue gas is removed, and purified gas is discharged; effluent of the second-section reactor enters the acidification reactor, acidification pH is controlled at 2-6, and selenate ions are reduced into the selenite ions; effluent of the acidification reactor enters the first-section reactor and is subjected to a reaction with the flue gas, and the selenite ions are removed; effluent of the first-section reactor enters an aerobic reactor, and ammonia nitrogen, COD and remaining Se pollutants in the wastewater are removed; effluent of the aerobic reactor enters a flocculating sedimentation tank for treatment. The Se-containing wastewater is taken as a desulfurization absorption liquid, so that the Se-containing wastewater andthe SO2-containing flue gas are treated efficiently simultaneously, waste is treated by waste, and the economic benefits are increased greatly.
Owner:FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
Method for culturing pleurotus geesteranus uniformly rich in selenium by using mixed selenium source
InactiveCN102150555BDifferent releaseAchieve stabilityHorticultureFertilizer mixturesSodium selenateInorganic selenium
The invention discloses a method for culturing pleurotus geesteranus uniformly rich in selenium by using a mixed selenium source. The method is characterized by comprising steps of: mixing selenium-enriched culture material additive in an amount which is 1 to 10 percent of the total weight of a dry culture material in the dry culture material, and culturing according to the common culture method to obtain the pleurotus geesteranus uniformly rich in selenium, wherein the selenium-enriched culture material additive has the total selenium content of 5 to 300mg / kg; the particles with the particlesize of 0.005 to 5.0mm in the selenium-enriched culture material additive are in multi-particle-size regional distribution, and particles with the particle size of 1.0 to 5.0mm at least account for 10 percent of the total weight of the additive; particles with the particle size of 0.005 to 0.1mm at least account for 40 percent of the total weight of the additive; the mixed selenium source is a mixture of an organic selenium source and an inorganic selenium source; the inorganic selenium source is one or a combination of two of sodium selenate and sodium selenite; and the organic selenium source is selenious yeast. The pleurotus geesteranus prepared by the method has high utilization rate and stable selenium content in different batches; in addition, by the method, selenium pollution is avoided, and the method is easy to operate and easy to promote.
Owner:SUZHOU SETEK
Detergent for selenium-polluted building wastes
InactiveCN105087187ASurface-active detergent compositionsDetergent compounding agentsHydrogenTetralone
The invention relates to a detergent, in particular to a detergent for selenium-polluted building wastes. The detergent is prepared by the following raw materials of 1-propyl-2-pyrrolidone, 2,6,6,8-tetramethyltricyclo[5.3.1.0]undecan-8-ol, 1,2,3,4,5-adonitol, 1,3,4,6,7,8a-hexahydro-1,1,5,5-tetramethyl-2H-2,4a-methanonaphthalen-8(5H)-tetralone, (6-methoxyl-4-quinolyl)(5-vinyl-1-[2.2.2]octanes-2-yl)methanol, and the like. The detergent for the selenium-polluted building wastes has the advantages that the detergent can be directly used for cleaning the building wastes; the efficiency of removing the antimony element in the antimony-polluted building wastes is more than 95%, the cleaning efficiency is high, and the removal effect is good; a new direction is developed for the research of the selenium pollution.
Owner:烟台顺隆化工科技有限公司
A selenium-resistant bacterial strain enterobacter ludwigii GX-C3 and its application
Owner:GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI +2
A treatment method and device for simultaneously removing selenium pollution and sulfide pollution
ActiveCN112159049BCarbon savingShort reaction timeWater treatment parameter controlWater contaminantsSulfideWaste treatment
The invention discloses a treatment method and device for synchronously removing selenium pollution and sulfide pollution, belonging to the technical field of environmental protection wastewater treatment. The treatment method for simultaneous removal of selenium pollution and sulfide pollution is as follows: selenate ions (SeO 4 2‑ ) reduced to selenite ion (SeO 3 2‑ ); the intermediate collection device collects the selenium-containing wastewater after the reaction through the membrane; the pH adjustment device adjusts the pH of the selenium-containing wastewater after the reaction; the selenium-containing wastewater after adjusting the pH enters the reaction device and reacts with the sulfide-containing wastewater, and removes it synchronously Selenium and sulfur pollutants; the final collection device collects the post-reaction wastewater. The method of the invention can use the sulfide-containing wastewater to treat the selenium-containing wastewater, realizes waste treatment with waste, high removal rate of selenium and sulfur, low carbon source consumption, and simple operation.
Owner:ZHEJIANG UNIV
Cultivation method of organic selenium-enriched water lily for food or tea
InactiveCN110012807BPromote absorptionImprove the conversion efficiency of organic seleniumFlowers cultivationFertilising methodsWater lilyGround water level
The invention discloses a method for cultivating organic selenium-enriched edible or tea water lilies, belonging to the technical field of aquatic plant cultivation. Through the selection of water lily varieties, the cultivation methods of direct pond planting and potted plant submersion are realized by using the planting pond and potting container at the same time, and the optimal deployment of selenium-rich bio-organic fertilizer and soil is applied to the planting pond and potting container, and then through further Water level control and topdressing, maintenance and management, thus cultivated to obtain organic selenium-enriched water lilies for food or tea. The invention realizes the acquisition of pure natural organic selenium-enriched edible or tea water lilies in a simple and efficient manner, improves the edible and tea value of water lilies, and at the same time solves the problem that the existing cultivation methods easily cause selenium pollution and the cultivation workload is large , high cost and low work efficiency.
Owner:GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
Method for culturing pleurotus geesteranus uniformly rich in selenium by using selenium-enriched crop stalks
InactiveCN102150557BAchieve stabilityHigh Selenium UtilizationHorticultureFertilizer mixturesSelenium pollutionPleurotus
The invention discloses a method for culturing pleurotus geesteranus uniformly rich in selenium by using selenium-enriched crop stalks. The method is characterized by comprising the steps of: mixing selenium-enriched culture material additive in an amount which is 1 to 10 percent of the total weight of a dry culture material in the dry culture material, and culturing according to the common culture method to obtain the pleurotus geesteranus uniformly rich in selenium, wherein the selenium-enriched culture material additive has the total selenium content of 5 to 50mg / kg; the particles with theparticle size of 0.005 to 5.0mm in the selenium-enriched culture material additive are in multi-particle-size regional distribution, and particles with the particle size of 1.0 to 5.0mm at least account for 10 percent of the total weight of the additive; particles with the particle size of 0.005 to 0.1mm at least account for 40 percent of the total weight of the additive; and the selenium-enriched culture material additive comprises the following components in percentage by weight: 30 to 70 percent of selenium-enriched wheat stalk powder and 30 to 70 percent of selenium-enriched cornstalk powder. The pleurotus geesteranus prepared by the method has high utilization rate and stable selenium content in different batches; in addition, by the method, selenium pollution is avoided, and the method is easy to operate and easy to promote.
Owner:安徽硒谷生物科技有限公司
Systems and methods of reducing selenium contamination in waste water
ActiveUS20200299156A1Reduce pollutionControl oxidationWater treatment parameter controlGas treatmentSelenium CompoundFlue gas
A method of reducing selenium contamination in a waste water stream is described herein. The method includes channeling a flue gas stream through an absorber, contacting the flue gas stream with an aqueous alkaline-based slurry, such that any selenium byproduct in the flue gas stream forms a selenium compound within the aqueous alkaline-based slurry, controlling oxidation of the selenium compound in the aqueous alkaline-based slurry, and adding a precipitation agent to the aqueous alkaline-based slurry to cause the selenium compound within the aqueous alkaline-based slurry to precipitate.
Owner:GENERAL ELECTRIC CO
A kind of pollution-free organic compound fertilizer rich in zinc, iron and selenium
InactiveCN103265375BGood weeding effectAntibacterial propertiesFertilizer mixturesOrganic compoundDrug resistance
The invention relates to a zinc-iron-selenium-rich pollution-free organic compound fertilizer. The zinc-iron-selenium-rich pollution-free organic compound fertilizer is characterized by being prepared from the following materials in parts by weight: 80-100 parts of agricultural wastes, 20-30 parts of wild peppers, 20-30 parts of gingko seed coats, 20-30 parts of fructus cnidii and the like. Compared with the prior art, the zinc-iron-selenium-rich pollution-free organic compound fertilizer has the advantages of being good in weeding effect, safe to environment, unlikely to generate weed drug resistance and the like, and is extensive in application prospect.
Owner:苏州禾润农业科技有限公司
Method for culturing pleurotus geesteranus uniformly rich in selenium by utilizing sodium selenate
InactiveCN102150558BDifferent releaseAchieve stabilityHorticultureFertilizer mixturesSodium selenateBiology
The invention discloses a method for culturing pleurotus geesteranus uniformly rich in selenium by utilizing sodium selenate. The method comprises the following steps: mixing the selenium-enriched cultivation material additive with the dry cultivation material, wherein the weight of the selenium-enriched cultivation material additive is 1-10% of the dry cultivation material, and then culturing according to a common culture method, thereby acquiring the pleurotus geesteranus uniformly rich in selenium, wherein the total selenium content in the selenium-enriched cultivation material additive is5-500mg / kg; the sizes of the grains in the selenium-enriched cultivation material additive are 0.005-5.0mm and the additive is in various grain sizes area distribution; the grains, the sizes of whichare 1.0-5.0mm are at least 10% of the weight of the additive; the grains, the sizes of which are 0.005-0.1mm are at least 40% of the weight of the additive; and the selenium-enriched cultivation material additive comprises the following raw materials in parts by weight: 100 weight parts of corncob powder and 0.0012-0.12 weight parts of sodium selenate. The selenium is high in use ratio, the selenium contents in the pleurotus geesteranus in different batches are stable, the method is free from hidden danger of selenium pollution, the operation is convenient, and the method is easily popularized.
Owner:SUZHOU SETEK
A kind of selenium-resistant bacterial strain gx-d6 and its application
The invention belongs to the technical field of microbiology, and in particular relates to a selenium-resistant bacterial strain GX-D6 and its application. A selenium-resistant bacterial strain GX‑D6, whose taxonomic name is Klebsiella pneumoniae subsp. rhinoscleromatis, was deposited in the Guangdong Microbial Culture Collection Center on December 10, 2020, with the preservation number GDMCC No.61356. The selenium-resistant bacterial strain Klebsiella pneumoniae subsp. rhinoscleromatis GX-D6 of the present invention can remove selenium in soil at a maximum of 40.04% at a selenium concentration of 4000 μg / mL. The results can provide bacterial strain resources for bioremediation of selenium polluted areas, and provide reference for the development and utilization of selenium resources.
Owner:GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
A treatment method and device for flue gas containing sulfur dioxide
ActiveCN108067090BReduce processing costsHigh removal rateWater contaminantsDispersed particle separationFlue gasSelenate ion
The invention relates to a treatment method for SO2-containing flue gas and a treatment device. A double-section flue gas desulfurization reactor is adopted, the flue gas enters the first-section reactor and is subjected to a reaction with Se-containing wastewater discharged by an acidification reactor, and selenite ions are removed; the flue gas enters the second-section reactor and is directly subjected to a reaction with the Se-containing wastewater, SO2 in the flue gas is removed, and purified gas is discharged; effluent of the second-section reactor enters the acidification reactor, acidification pH is controlled at 2-6, and selenate ions are reduced into the selenite ions; effluent of the acidification reactor enters the first-section reactor and is subjected to a reaction with the flue gas, and the selenite ions are removed; effluent of the first-section reactor enters an aerobic reactor, and ammonia nitrogen, COD and remaining Se pollutants in the wastewater are removed; effluent of the aerobic reactor enters a flocculating sedimentation tank for treatment. The Se-containing wastewater is taken as a desulfurization absorption liquid, so that the Se-containing wastewater andthe SO2-containing flue gas are treated efficiently simultaneously, waste is treated by waste, and the economic benefits are increased greatly.
Owner:FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
Method for monitoring and removing poisonous substance selenium by using microorganism electrochemical system
ActiveCN107935195AEconomic Pollution Control TechnologyEfficient Pollution Control TechnologyWater treatment parameter controlTreatment by combined electrochemical biological processesEnvironmental resistanceWater quality
The invention belongs to the technical field of sewage treatment, and provides a method for monitoring and removing poisonous substance selenium by using a microorganism electrochemical system. Basedon a microorganism electrochemical system and an external circuit system, the method comprises: 1) assembling a microorganism electrochemical system; 2) performing positive electrode carbon brush culture to form an electricity generation biofilm; and 3) performing continuous operation, adding 0-150 mg / L of selenium-containing waste water, carrying out stable operation, recording the voltage periodof selenium-containing waste water in a concentration gradient, and measuring the concentration, which is a characteristic concentration, of selenium-containing waste water outlet. Based on the microorganism electrochemical system, selenium pollution of water is monitored in real time on line, and poisonous substance selenium is removed. The method has multiple functions of electricity generation, monitoring, and poisonous substance removal, and is economic eco-friendly treatment technology.
Owner:DALIAN UNIV OF TECH
A selenium-enriched bacterium and its isolation method
ActiveCN109971691BCharacterized by selenophilic microorganismsEasy to operateBacteriaMicroorganism based processesBiotechnologyMicroorganism
The present invention provides a selenium-enriched bacterium and its isolation method. The scientific name of the selenium-enriched bacterium is Comamonas sp. W41, and the depository unit is: General Microbiology Center of China Microbiological Culture Collection Management Committee; Address: Beijing Institute of Microbiology, Chinese Academy of Sciences, No. 1, Yard 1, Beichen West Road, Chaoyang District; date of deposit: May 24, 2018, deposit registration number: CGMCC NO.15803. The strain has the characteristics of selenophilic microorganisms, and has potential application value in the biotransformation of selenium, the microbial synthesis of nano-selenium, and the remediation of selenium-polluted environments.
Owner:BEIJING UNION UNIVERSITY
Method for cultivating oyster mushroom uniformly rich in selenium with sodium selenite as selenium source
InactiveCN102150559BDifferent releaseAchieve stabilityHorticultureFertilizer mixturesAnimal scienceOyster
The invention discloses a method for cultivating oyster mushroom uniformly rich in selenium with sodium selenite as the selenium source. The method is characterized in that the method comprises the steps of mixing selenium-rich cultivating material additive accounting for 1-10 percent of the total weight of dried cultivating material into the dried cultivating material, and cultivating oyster mushroom according to an ordinary cultivation method to obtain oyster mushroom uniformly rich in selenium; the selenium-rich cultivating material additive has a total selenium content of 5-500 mg / kg, thegrain sizes of the particles in the selenium-rich cultivating material additive are in the range of 0.005-5.0 mm with multi-grain-size regional distribution, the particles having a grain size of 1.0-5.0 mm account for at least 10 percent of the total weight of the additive, while the particles having a grain size of 0.005-0.1 mm account for at least 40 percent of the total weight of the additive;according to the respective parts by weight portions, the raw materials of components used in the selenium-rich cultivating material additive comprise 100 portions of cotton shells and 0.0011-0.11 portion of sodium selenite. The method has the advantages that the selenium utilization factor in oyster mushroom is high, and the selenium content in different batches of oyster mushroom is stable; besides, the method has no potential danger of selenium pollution, is convenient to operate, and easy to promote.
Owner:SUZHOU SETEK
Systems and methods of reducing selenium contamination in waste water
ActiveUS11091378B2Reduce pollutionControl oxidationWater treatment parameter controlGas treatmentSelenium CompoundFlue gas
A method of reducing selenium contamination in a waste water stream is described herein. The method includes channeling a flue gas stream through an absorber, contacting the flue gas stream with an aqueous alkaline-based slurry, such that any selenium byproduct in the flue gas stream forms a selenium compound within the aqueous alkaline-based slurry, controlling oxidation of the selenium compound in the aqueous alkaline-based slurry, and adding a precipitation agent to the aqueous alkaline-based slurry to cause the selenium compound within the aqueous alkaline-based slurry to precipitate.
Owner:GENERAL ELECTRIC CO
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