113results about How to "Reduce the content of heavy metal ions" patented technology

A papermaking wastewater advanced treatment and recycling device and a method thereof relate to the treatment of papermaking wastewater. The invention provides a papermaking wastewater advanced treatment and recycling device which combines the nanometer catalytic electrolysis technology with the membrane technology, has lower cost and higher efficiency and can recycle wastewater, and a method thereof. The papermaking wastewater advanced treatment and recycling device is provided with a nanometer catalytic electrolysis system, a membrane filtration separation system and a membrane cleaning regeneration system. The method of the invention comprises the following steps: papermaking wastewater is extracted by a water pump and introduced in a nanometer catalytic electrolysis tank to perform nanometer catalytic electrolysis, then the obtained water is introduced in a filtering tank for filtration to remove the solid impurities, plankton, bacteria and colloid in wastewater and obtain the purified wastewater; and the purified wastewater is filtered and separated by the membrane filtration separation system to obtain dialyzate and concentrated solution, wherein the dialyzate is used for recycling; and one part of the concentrated solution flows back to the nanometer catalytic electrolysis system and the other part is directly discharged.

The present invention relates to an insect-preventing nuisance-free ecological liquid fertilizer, its component composition includes chitoglycan organic nutrient matter, amino acid organic nutrient matter, conventional fertilizer nutrients and mineral nutrient. Said liquid fertilizer not only can be used as fertilizer, but also has the action of preventing insects, and contains no any harmful substances.

Provided is an apparatus for producing reclaimed water based on electrolysis and double membrane technologies. The apparatus is disposed with an electrolysis system, an MBR system and a reverse osmosis system. Further provided is a method for producing reclaimed water using the apparatus, comprising the following steps: retrieving biochemical sewage through a water pump (12) and inputting the biochemical sewage into an electrolysis apparatus (13) of the electrolysis system to be electrolyzed, then enabling the sewage to enter an MBR reaction tank (26) through a grid (22) to obtain primary reclaimed water, pumping the primary reclaimed water into the reverse osmosis system with a high pressure pump (45) to separate dialysis water and concentrated water, enabling the dialysis water to enter a reclaimed water storage tank (48) to obtain ultrapure reclaimed water, enabling a part of the concentrated water to flow back for cyclic membrane filtering and separation, enabling a part of the concentrated water to flow back to enter an electrolysis procedure for cyclic use, and discharging the rest part of the concentrated water.

The invention relates to a sensitization-free and activation-free chemical silvering method for a polyamide base body. The method comprises the following steps: (1) soaking a polyamide fabric in a pretreatment solution, washing, taking out and cleanly rinsing to obtain the washed polyamide fabric, and performing ultraviolet laser radiation to obtain the treated polyamide fabric; (2) preparing chitosan and polyvinyl alcohol mixing solution, adjusting the pH value by using glacial acetic acid, and dropwise adding a cross-linking agent under a stirring state to obtain a chitosan derivative solution; (3) soaking the treated polyamide fabric obtained in the step (1) in the chitosan derivative solution, and baking to obtain the polyamide fabric modified by chitosan derivatives; and (4) soaking the modified polyamide fabric in a silvering reaction solution, chemically plating, performing vibrating reaction in a vibrating dyeing machine, and then taking out, washing and drying to obtain the polyamide base body. The preparation method is simple and convenient, production conditions and requirements are simple, and according to the method, sensitization-free and activation-free effects are achieved, the production cost is low and the environmental pollution is low.

The invention discloses a comprehensive wastewater reuse treatment method for a waste incineration power plant. The method comprises the steps of production sewage pre-treatment, flue gas wastewater pre-treatment, domestic sewage pre-treatment, landfill leachate pre-treatment, reverse osmosis deep treatment and dehydration treatment. According to the method, landfill leachate and domestic sewage are mixed and subjected to facultative and aerobic treatment, so that COD and NH3-N in the landfill leachate can be effectively reduced, the proportion of pollutants in sewage can be balanced, the mixed liquid has good biodegradability, and the effluent quality is good; the pretreated production wastewater, the biodegraded landfill leachate and domestic sewage are subjected to combined deep treatment, and only one set of treatment device is needed, so that the investment cost is reduced; and sewage combined treatment is adopted, so that the content of COD and heavy metal ions in the sewage which enters a reverse osmosis system can be effectively reduced, the problem of reverse osmosis membrane blockage can be effectively relieved, the frequency of chemical cleaning can be reduced, and the service life of the reverse osmosis membrane can be prolonged.

The application provides a mineral processing tailing wastewater treatment method. The mineral processing tailing wastewater treatment method comprises the following steps: A), mixing the mineral processing tailing wastewater and a destabilizing agent to obtain destabilized wastewater; B), mixing the destabilized wastewater and a first coagulant and sedimenting to obtain tailing wastewater supernatant and flocs; and C), mixing the tailing wastewater supernatant and a second coagulant and sedimenting to obtain purified water. During the treatment of mineral processing tailing wastewater, the wastewater is firstly destabilized so that suspended solids in the tailing wastewater is free from the steady state and then the destabilized tailing wastewater is further purified by virtue of a two-stage coagulating sedimentation method in a connected-in-series manner so as to accelerate the formation and sedimentation of coarse particle polymers, the contents of the suspended solids and heavy metal ions in the wastewater are decreased in a short time and the environmentally acceptable discharge of the wastewater is achieved.

The invention discloses a method for solidifying tailing sands by active magnesium oxide-based microorganisms, and a product thereof. Active magnesium oxide is used as a basic solidifier, and a microbial technology is used to provide CO2 required for carbonization and reduce heavy metals in the tailing sands, so the advantages of a technology for solidifying soil with magnesium oxide and the microbial technology are fully used; carbonate ions produced by hydrolysis of urea with bacillus are used for carbonizing the magnesium oxide solidified soil, so the strength of bricks is improved; and theextracellular complexation effect, extracellular precipitation effect and intracellular accumulation effect of the microorganisms on the heavy metals are used to reduce the content of heavy metal ions. The method has the advantages of simple process, sintering avoiding, short construction period, high strength, greenness, environmental friendliness, achieving of the win-win situation of environmental benefits and economic benefits, and good application prospect.

The invention discloses bitter apricot kernel oil with high nutritive value and an extraction method thereof. The bitter apricot kernel oil and the extraction method have the beneficial effects that bitter apricot kernels are taken as the raw materials, and the low temperature biological processing technology is adopted in the whole course, thus effectively avoiding losses of thermosensitive nutrients in the bitter apricot kernels, such as proteins, higher fatty acids and vitamins; free oil, emulsion, hydrolysate and apricot kernel residues are obtained after enzyme deactivation by microwave irradiation, freezing and breaking, enzymolysis and vacuum centrifuging; the emulsion undergoes vacuum centrifuging after undergoing biological demulsification to obtain free oil; the free oil is mixed to prepare the bitter apricot kernel oil with high oil extraction rate (93-97%), high nutrient and active substance content, strong food safety (the residual quantity of cyanides is below 0.08mg/kg) and long shelf life (5-6 years); the extraction method has the effects of increasing the variety, yield and added value of the byproducts after oil extraction while increasing the product quality and yield, further reducing the oil extraction cost, completely eradicating discharge of the three wastes and protecting the environment.

The invention discloses a high-density pleurotus eryngii liquid strain fermentation medium and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving strain cold and heat resistant irritability, immunity and infectious microbe resistant capacity are scientifically compounded in media of all stages of liquid seeds, shaking seeds, seed tank seeds and fermentation tank liquid strains; wood chip powder with raw material adaptation and a defoamer function is scientifically compounded; the spawn age and the multiplication algebra difference are shortened, and coated chitosan with special functions is fed timely, accordingly, pleurotus eryngii liquid strains which are thick in fermentation hypha, high in activity, small in mycelium pellet diameter, large in density and uniform in distribution are cultivated, the mycelium pellet density ranges from (4.5-5.5)*105/L, the mycelium pellet diameter ranges from 0.5mm to 0.7mm, the mycelium pellet dry weight ranges from 90g/L to 100g/L, germination time is in a range of 4h to 5h, and the exopolysaccharides is 3.0g/L to 3.5g/L.

The invention discloses a pleurotus eryngii liquid strain with small and many mycelium pellets and a fermentation method of the pleurotus eryngii liquid strain, and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving cold resistance, heat irritability resistance, immunity and bacterium-resisting capacity of the strain are scientifically compounded in culture mediums for liquid seeds, shaking flask seeds, seeding tank seeds and fermentation tank liquid strains in all stages, and meanwhile wood powder which has the feedstock adaptability and has the function of an antifoaming agent is scientifically compounded; manners of supplemental inoculation and segmentation variable temperature fermentation are adopted, and therefore the difference between the strain cell age and the multiplication algebra is shortened; and packaged chitosan with a special function is properly fed, and the pleurotus eryngii liquid strain with the thick and solid fermentative hyphae, high activity, small mycelium pellet diameter, large density and uniform distribution is cultured. The density of the mycelium pellets ranges from 4.5*10<5>piece/L to 5.5*10<5>piece/L, the diameter of the mycelium pellets ranges from 0.5mm to 0.7mm, the dry weight of the mycelium pellets ranges from 90g/L to 100g/L, the germination time ranges from 4 hours to 5 hours, and the exopolysaccharide ranges from 3.0g/L to 3.5g/L.

The invention discloses oxidization-resistant bitter almond oil and an extraction method thereof. Bitter almonds serve as a raw material, a low-temperature biological processing technology is adopted in the whole process, the loss of thermosensitive nutrient substances such as protein, higher fatty acid and vitamins in the bitter almonds is effectively avoided, free oil, emulsion, hydrolysate and almond residue are obtained through microwave irradiation enzyme deactivation, refrigeration crushing, enzymolysis and vacuum centrifugation, the emulsion undergoes biological demulsification and then undergoes vacuum centrifugation again to obtain free oil, and the free oil is merged to obtain the bitter almond oil which is high in grease extraction rate (93-97%), nutrition and active material content and food safety (the cyanide residue is 0.08 mg/kg or below) and long in guarantee period (5-6 years). According to the extraction method, the variety, yield and added value of by-products after grease extraction are increased while the product quality and yield are improved, the grease extraction cost is further reduced, the emission of three wastes is avoided, and the environment is protected.

The invention discloses a high-density pleurotus eryngii liquid strain and a fermentation method thereof, and belongs to the technical field of pleurotus eryngii cultivation. Scientific compounding is carried out on Chinese herb extracts capable of improving the cold resistance, thermal stress, immunity and infectious microbe resisting capacity of the strain in culture media of liquid seeds, shake flask seeds, seeding tank seeds and fermentation cylinder liquid strains at all stages, meanwhile, scientific compounding is carried out on wood bit powder with raw material adaptability and antifoaming agent functions, a supplemental inoculation and subsection temperature varying fermentation mode is adopted, the cell age of the strain and the multiplication generation gap are shortened, coated chitosan with the special function is fed in good time, the pleurotus eryngii liquid strain with thick and solid fermentation mycelia, high activity, the small mycelium pellet diameter, large density and even distribution is cultured, the mycelium pellet density is 4.5-5.5*105 per liter, the diameter of the mycelium pellet is 0.5 mm to 0.7 mm, the dry weight of the mycelium pellet is 90 g/L to 100 g/L, germinating time is 4 h to 5 h, and exopolysaccharides is 3.0 g/L to 3.5 g/L.

The invention relates to agricultural microorganism bacterium fertilizer granules which are prepared from, by weight, 5-10 parts of biological bacteria, 40-50 parts of sorghum residue, 10-20 parts of weed, 1-5 parts of cytex, 2 parts of chitosan, 5 parts of olivine powder, 2-5 parts of microelements, 1-2 parts of physical and chemical regulation factors, 5-10 parts of water, and a coating agent saccharose and 8-hydroxyquinoline. The invention further relates to a preparation method of the agricultural microorganism bacterium fertilizer granules. The preparation method comprises the steps of fermentation, granulation and two-layer coating. The agricultural microorganism bacterium fertilizer granules have the advantages that crop growth is promoted, plant diseases and insect pests are reduced, the chemical fertilizer utilization rate is improved, environmental pollution is reduced, and the heavy metal content in soil is reduced.

The invention discloses a garbage incineration fly ash treatment method and in particular relates to the technical field of environment engineering. The garbage incineration fly ash disposal method specifically comprises the following steps: S1, carrying out washing pre-treatment on fly ash; S2, carrying out initial leaching treatment on an ash/water mixed system after washing by using an inorganic solvent; and S3, carrying out secondary leaching by way of organically combining alkali leaching and acid leaching. By carrying out washing pre-treatment on the fly ash generated by combustion of household garbage by water and adding an inorganic agent solution into the ash/water mixed system after washing for initially leaching heavy metal ions, the inorganic agent solution and the heavy metalions in the fly ash are coordinated to form a stable soluble compound, and the ash/water mixed system after initially leaching the heavy metal ions in the fly ash by using the inorganic agent solutionis secondarily leached by way of organically combining alkali leaching and acid leaching, so that the content of the heavy metal ions in the fly ash can be reduced greatly.

The invention discloses a multi-element biological organic soil improved fertilizer and a preparing method thereof. The fertilizer is prepared from, by certain weight, urea, monoammonium phosphate, potassium chloride, domestic animal slaughtering waste, humic acid, expanded perlite, composite microbial agent, plant straw, potassium fulvic acid, copper sulfate, ferrous sulfate, zinc ion-porphyrin nanometer complex and nanometer titania powder. The fertilizer is reasonable in formula, balanced nutrients are released, nutrient requirements for the growth of crops are fully met, the yield of the crops can be obviously increased, and the quality of the crops can be obviously improved; meanwhile, the phenomenon that soil is hardened can be obviously avoided, and the content of heavy metal ions in the soil is lowered.

The invention discloses a liquid strain fermentation culture medium, and belongs to the technical field of pleurotus eryngii cultivation. Chinese herb extracts capable of improving cold resistance, heat irritability resistance, immunity and bacterium-resisting capacity of the strain are scientifically compounded in culture mediums for liquid seeds, shaking flask seeds, seeding tank seeds and fermentation tank liquid strains in all stages, and meanwhile wood powder which has the feedstock adaptability and has the function of an antifoaming agent is scientifically compounded; manners of supplemental inoculation and segmentation variable temperature fermentation are adopted, and therefore the difference between the strain cell age and the multiplication algebra is shortened; and packaged chitosan with a special function is properly fed, and the pleurotus eryngii liquid strain with the thick and solid fermentative hyphae, high activity, small mycelium pellet diameter, large density and uniform distribution is cultured. The density of the mycelium pellets ranges from 4.5*10<5>piece/L to 5.5*10<5>piece/L, the diameter of the mycelium pellets ranges from 0.5mm to 0.7mm, the dry weight of the mycelium pellets ranges from 90g/L to 100g/L, the germination time ranges from 4 hours to 5 hours, and the exopolysaccharide ranges from 3.0g/L to 3.5g/L.

The invention belongs to the technical field of rainwater reutilization and waterproof comprehensive pipe gallery construction and particularly relates to a waterproof comprehensive pipe gallery structure of an ecological system of a sponge city. The structure is used as a drainage device in heavy rain and applied for irrigation after raining, so that the content of heavy metal ions in rainwater is reduced, the influence on underground water is reduced, urban waterlogging is alleviated, the functions of the sponge city are realized, and ground precipitation is filtered and drained. Water in the soil around the comprehensive pipe gallery is collected and circulated, damaged caused to a gallery body by water accumulation at the periphery of the gallery body and water seepage, water leakage and the like in the gallery body, the service life of the gallery body is indirectly prolonged, and self-circulation of underground water in the soil can be formed; the waterproof and anti-corrosion construction problems of existing underground pipe galleries are solved, the maintenance cost of the underground pipe galleries in the later use period is reduced, and the service life of the underground pipe galleries is prevented from being shortened by water leakage and corrosion. In this way, the service life is prolonged, the problems of water acquirement, water utilization and the like of thecomprehensive pipe gallery are effectively solved, and the structure has high practicability and applicability.