108results about How to "Avoid chemical contamination" patented technology

The invention discloses a biological mixed bacterial fertilizer and a preparation method and application thereof. The biological mixed bacterial fertilizer is prepared from, by weight, 1-20 parts of a compound bacterial agent, 300-400 parts of organic materials, 500-600 parts of inorganic materials, 800-1000 parts of chemical fertilizers, 5-10 parts of trace elements, 300-500 parts of waste liquid, 30-50 parts of amino acid salts and 50-100 parts of additives.

The invention discloses a method for treating eutrophic lake cyanobacterial bloom. An enclosure parallel to the local prevailing wind direction is built to block water flow exchange, and large lake cyanobacteria are prevented from entering a control water area. By means of the characteristic that the cyanobacteria floating on the surface layer move with prevailing wind as main drive force, blocking is carried out, the cyanobacteria are guided to the down-wind lakeshore in the direction of the enclosure, and a cyanobacterium enrichment area is formed. A cyanobacterium removal facility is arranged in the cyanobacterium enrichment area, and the cyanobacteria are removed in a large area with high strength. A drainage facilitate with the water flow direction consistent with the prevailing wind direction is arranged, reclaimed water or clean water is drained to enter the control water area to replace contaminated water, and meanwhile water power is enhanced. A water layer mixing facility is arranged in the water area with low water power, the upper water layer and the lower water layer are disturbed, water flow circulation in the transverse direction and the longitudinal direction is generated to the water, the still water environment needed for accumulation of the cyanobacteria is damaged, and the aims of controlling and restraining the cyanobacteria are achieved. According to the method, the cyanobacterial bloom breakout intensity can be effectively controlled, the ecological environment of the nearshore water area is restored, and the water environment quality and the area landscape effect are remarkably improved.

The invention discloses a composite material and a preparation process thereof. The composite material comprises an upper layer perforated film (1) which is contacted with the skin of a user and a lower layer non-woven fabric (2) which is positioned on the lower side of the upper layer perforated film (1), wherein slim holes (4) which are punched in a vacuum absorption mode are uniformly distributed on the surface of the perforated film (1); the upper layer perforated film (1) and the lower layer non-woven fabric (2) are compounded together through fusion laminating points (3); and 50 to 90 percent of slim holes at the fusion laminating points (3) of the perforated film (1) in the composite material are closed due to lamination. The preparation process comprises the following steps of: compounding the perforated film (1) subjected to the vacuum absorption with the non-woven fabric (2) through secondary perforation, namely punching the slim holes (4) in a cast film (6) through a roller type perforation mesh cage (7) by using a vacuum suction nozzle, then mechanically perforating the cast film through compression rollers (15 and 16), and compounding the perforated film (1) with the non-woven fabric (2) through the fusion laminating points so as to obtain the composite material which has a dry, comfortable and flexible surface and can be well diffused in the longitudinal direction.

The invention relates to a laser removing device for enameled wire cladding layer. The laser output from a laser output head is focused on the cladding layer of the enameled wire through a transmission optical path assembly. The enameled wire is coaxially arranged with the laser output head and the rotary driver. The rotary actuator rotates the transmission optical path assembly about its axis, removing the enameled wire cladding. A laser removing device for enamel wire clad layer adopts an automatic operation mode and utilizes laser to act on that enameled wire clad layer, which overcomes thedefect that the manual contact operation mode is easy to damage the enameled wire body and improves the working efficiency of removing the enameled wire clad layer compared with the sandpaper polishing mode; Compared with paint stripper, it can effectively reduce chemical pollution and personal hazards to operators.

The invention belongs to the technical field of hydrogel materials, and particularly relates to degradable self-healing chitosan composite aldehyde guar gum hydrogel as well as a preparation method and application thereof. The method comprises the following steps: 1) obtaining a chitosan (CHI) solution; 2) preparing a solution of aldehyde guar gum (AGG); and 3) carrying out a reaction on the solution of aldehyde guar gum with the solution of chitosan to prepare the degradable self-healing chitosan composite aldehyde guar gum hydrogel. According to the preparation method, an aldehyde group on an AGG chain and an amino group on a CHI chain are subjected to a Schiff base reaction to form an imine bond, and the CHI/AGG hydrogel is obtained by taking the imine bond as a cross-linking point. Dueto a dynamic crosslinking mechanism, the hydrogel can realize self-healing within 5 minutes and can be degraded near a neutral environment.

The invention provides an efficient saline-alkali soil repair agent which is good in effect, short in time and free of pollution. The efficient saline-alkali soil repair agent is characterized by being prepared from calcium oxide, silicon dioxide, aluminium oxide, sulfur trioxide, ferric oxide, magnesium oxide, titanium dioxide, potassium oxide, manganese oxide, sodium oxide and water. Natural mineral substances serve as main raw materials. The efficient saline-alkali soil repair agent is green, environmentally friendly and free of pollution. The PH value of repaired soil can be kept neutral after the efficient saline-alkali soil repair agent is used, plant growth is not influenced, and secondary pollution to the surrounding can be avoided. The soiled repaired through the efficient saline-alkali soil repair agent is good in water-retaining property and fertilizer-retaining property. The efficient saline-alkali soil repair agent can be used for repairing sandy lands and arid lands. Repaired soil can not be dissolved in water before and after being repaired, water and soil loss can be prevented, malodor in soil can be closed, harmful substances can be solidified, and harmful substances can be prevented from flowing out and causing pollution to the surrounding. The efficient saline-alkali soil repair agent is low in cost and high in speed, soil repair can be completed within only one week, the repair effect is stable and durable, and an operation system is small and efficient.

The invention discloses a step-by-step grading sampling method suitable for a carbonatite sample. The step-by-step grading sampling method comprises the steps of: sample collecting, sample coarse crushing, sample fine crushing and sample selecting, wherein the sample coarse crushing is realized as follows: a target mineral is completely separated from surrounding rock by adopting a mechanical crushing method, and meanwhile a crushed sample containing the target mineral is obtained; and the sample fine crushing is realized as follows: the crushed sample containing the target mineral, obtained from the sample coarse crushing, is further crushed by adopting a mechanical crushing method to obtain the target mineral and the crushed sample containing the target mineral, and the acting point of the mechanical crushing is in the carbonatite surrounding rock. According to the step-by-step grading sampling method, the target mineral can be accurately selected without changing the chemical components of the target mineral and causing the pollution of other minerals, the reliability of analysis testing on the aspects of elementary composition, isotope composition and the like is improved, and the foundation is further laid for the research of a carbonatite reservoir.

The invention discloses a multifunctional low-density curing working solution system which is prepared from the following components in parts by mass: 100 parts of waste drilling fluid, 30-70 parts ofa curing agent I, 10 parts of a curing agent II, 1-5 parts of a flexibilizer, 1-6 parts of an activating agent, 0.5-5 parts of a strength enhancer, 0.1-3 parts of an anti-pollution agent, 0.1-3 partsof diluent and 0.1-3 parts of a suspension stabilizer, wherein the curing agent I is blast furnace slag; the curing agent II is pumice powder; the flexibilizer is a mixture of modified basalt fibersand rubber latex; the activating agent is sodium hydroxide or potassium hydroxide; and the strength enhancer is sodium metasilicate nonahydrate, calcium sulfate, sodium carbonate or a mixture thereof.The multifunctional low-density curing working solution system disclosed by the invention has the characteristics of low temperature early strength, low elasticity modulus, high cementing between twointerfaces, excellent plugging effect and the like, is low in cost, environment-friendly and convenient in site construction and has wide market application prospects.

The invention discloses a water-soluble fertilizer containing a carbon-enzyme polypeptide and a preparation method of the water-soluble fertilizer. The water-soluble fertilizer comprises the followingraw materials in parts by weight: 25-40 parts of polycarbon enzyme, 70-90 parts of citric acid, 150-200 parts of an organic material extract, 20-30 parts of trace elements, 30-45 parts of an additive, 10-20 parts of polypeptide, 500-700 parts of a waste liquid, 100-150 parts of a chemical fertilizer.

The invention discloses a multiplex RT-PCR kit for BTV-11, BTV-17, BTV-20, BTV-23 and BTV-24 genotype identification and a detection method of the multiplex RT-PCR kit. The multiplex RT-PCR kit is used for simultaneously discriminating and detecting bluetongue virus types 11, 17, 20, 23 and 24 with a single tube. According to the method, 5 pairs of PCR specific primers are designed according to conserved regions of VP2 gene sequences of various types of viruses, in addition, a pair of non-biogenic-derivation universal primers are synthesized with reference to a GeXP principle, the universal primers are separately added to upstream and downstream of each pair of specific primers to form 5 pair of specific embedded primers, reverse transcription is carried out with the specific primers, andfinally, multiplex PCR is constructed by adopting the universal primers and the specific embedded primers. By utilizing an optimized multiplex PCR system and conditions, one or more of the 5 genotypesof the bluetongue viruses can be simultaneously discriminated and detected with the single tube, specific amplification to other types of BTV, PPRV and FMDV nucleic acid is avoided, and the minimum detection concentration can reach a pg level. The method disclosed by the invention is high in sensitivity, high in specificity and easy in result observation and is timesaving and laborsaving.

The invention relates to a high-yield wild-imitating growing method of a remote lemongrass herb, and belongs to the technical field of agricultural planting. The method comprises 8 steps of preparing soil of a tea garden, collecting a wild remote lemongrass herb, furrowing, transplanting, watering, weeding, preventing insects in a pollution-free manner, harvesting and top-dressing, and further comprises the step of manufacturing the planted remote lemongrass herb into tea leaves. According to the invention, the scattered wild remote lemongrass herb is transplanted to the tea garden where the growing environment and the watering and fertilization are not changed, and is planted in close groups, so that the quality of the remote lemongrass herb is guaranteed from the source, and the problems that the number of the wild remote lemongrass herb is small and the remote lemongrass herb can only made into medicines instead of tea are solved. The method adopts the wild-imitating growing mode, and guarantees the original taste and flavor of the remote lemongrass herb as well as zero chemical pollution. Meanwhile, an excellent water supply and drainage system is provided, the weeds and the insects are timely physically controlled and prevented, the yield, the nutrition and the fragrance of the remote lemongrass herb are greatly improved, the remote lemongrass herb is harvested twice in a year, the yield per mu of the fresh herb is 1000kg to 1500kg, and a produced tea bag is higher in quality and better in palatability.

The invention discloses a zeolite loaded Bil-xRxVO4-Fe3O4 magnetic nano photocatalyst. The molecular formula of the photocatalyst is Bil-xRxVO4-Fe3O4/zeolite, wherein R is La or Pr, and x is 0-0.3. Apreparation method of the photocatalyst comprises the steps that a certain amount of R2O3 is weighed for use, concentrated nitric acid is added in R2O3, cooling is conducted, and a R(NO3)3 crystal isobtained; a certain amount of citric acid, Bi(NO3)3 5H2O, NH4VO3 and R(NO3)3 are weighed, the materials are added in distilled water, stirring is conducted, and precursor sol is obtained; zeolite, Fe3O4 and the distilled water are added in the precursor sol, the mixture is stirred to be uniform, heat preservation is conducted, and then the zeolite loaded Bil-xRxVO4-Fe3O4 magnetic nano photocatalyst is obtained. According to the magnetic nano photocatalyst, the catalytic effect is better compared with the catalytic effect of an existing photocatalyst, and the magnetic nano photocatalyst has theadvantages that the cost is low, the universality is high, and the requirements on raw materials are greatly lowered. The raw materials are easy to obtain, the threshold of production implementing islowered, and the magnetic nano photocatalyst is applicable to popularization, application and large-scale industrial production.

The invention provides a stamping reinforcement method of a weak rolling area of a roadbed and an application of the stamping reinforcement method of the weak rolling area of the roadbed. A high speed stamping reinforcement device-stamping rammer compactor is used, and a stamping pounder is lifted in a hydraulic or mechanical manner to punch a tamping plate with a buffer gasket for conducting stamping reinforcement on the weak rolling area of the roadbed which is normally rolled. An application of the stamping reinforcement method of the weak rolling area is further provided for the weak rolling area of the roadbed of a compact road rolled normally. Stamping reinforcement is carried out on junction of new and old roadbeds when the old road is widened, base of the roadbed newly widened, and newly filled roadbeds. Stamping reinforcement is carried out on a roadbed structure base and the weak rolling area of the roadbed of the compact railway rolled normally. Stamping reinforcement is carried out on water damage treatment of roadbeds of roads and railways. Stamping reinforcement is carried out on reinforcing the weak rolling area of river dams and brake back backfill water conservancy projects. The stamping reinforcement method of the weak rolling area of the roadbed provided by the invention has the beneficial effects that the backfill compactness of the weak rolling area of the roadbed is improved, the bearing capacity of the roadbed is improved, post-construction settlement of the weak rolling area is reduced, the project quality is effectively improved, the project expenses are saved, and the economical benefits are remarkable.

The present disclosure relates to dialysis devices. In some embodiments, a dialysis device may include a disposable housing having a storage chamber in fluid communication with a dialysate flow path. Also included may be a controller, an interface capable of operably coupling the controller and the disposable housing, a fluid displacement structure, a pump configured to actuate a deformable diaphragm, and a pressure sensor to trigger the reversal of the pump. The flow path may be fluidly sealed from the controller and the interface.

The invention relates to the technical field of production technologies of foamed cotton, and discloses a production technology of environment-friendly foamed cotton. The production technology of theenvironment-friendly foamed cotton comprises the steps of firstly, mixing and plastifying corresponding components of a material and reinforcing filler, and conducting primary banburying treatment; secondly, adding zinc oxide and stearic acid into a product obtained in the reaction for secondary banburying treatment; then adding a foaming agent, a foaming cross-linking agent, a PU colorant, an odor elimination agent and a stabilizer for tertiary banburying treatment; and finally, carrying out a milling-sheet extruding-cutting-foaming-cooling treatment technology process in sequence to obtain the polyurethane environment-friendly foamed cotton at last. According to the physical and chemical performance of the reactant components, reasonable sectional banburying treatment is conducted, thusthe output rate and quality of the foamed cotton are effectively improved, a mould-pressing physical gas foaming method is adopted, no chemical agents are used, thus chemical pollution is avoided, thetechnology is more environmentally friendly, and by controlling ageing and temperature of the reaction, foamed particles which are even in foam cell, controllable in size and controllable in foamingdensity can be obtained.

The invention discloses a disposing technology of stainless steel container surface, which comprises the following steps: adopting mechanic polishing to predispose, polishing local mirror, disposing decorative prevention, disposing shot-blast with diameter at 0.2-1.2mm, cleaning surface, coating surface, adsorbing dust, blowing dust, brushing, spraying film liquid, coating film liquid through high-pressure static specific equipment.

The invention discloses an environmental-friendly and waterproof urea-formaldehyde resin adhesive which comprises the following raw materials: high gluten flour, sulfuric acid, a urea-formaldehyde resin adhesive, pigments and a coagulation accelerator. The manufacturing process of the adhesive comprises preparation of a waterproof and environmental-friendly matrix; and adhesive formation. The release amount of free formaldehyde is 0 after the urea-formaldehyde resin adhesive is cured for 48h; the maximum release content is 0.02mg/L after the urea-formaldehyde resin adhesive is cured for 96h; the immersed peel length of each edge of a board is 0mm after the board is immersed for 4-6h in distilled water at 90-100 DEG C; and the adhesive is remarkable in environmental-friendly and waterproof performances.