51results about How to "To achieve the purpose of purifying wastewater" patented technology

The invention provides a treatment method of heavy metal wastewater, and particularly relates to a method for treating heavy metal wastewater by virtue of a precipitation method. The method comprises the following steps: adding sodium sulfide in a heavy metal wastewater treatment process, reacting sulfur ions with heavy metal ions in the wastewater to generate particulate matters, further adding sulfide precipitates of heavy metal, stirring, standing, and accelerating the sedimentation of micro particulate matters and other substances by using generated particulate matter precipitates; further preferably adding quartz sand, and accelerating the rapid sedimentation of the particulate matters and other substances under the wrapping action of quartz sand; further performing subsequent process treatment including sand filtration and ion exchange on a supernatant liquor obtained after sedimentation to reach the emission standard; and periodically discharging and collecting part of the precipitates, and recycling heavy metals in the precipitates. Because the method provided by the invention is simple in working procedure, low in cost and high in efficiency, the method can be widely applied to the treatment of industrial wastewater particularly the heavy metal wastewater.

The invention relates to a catalysis wet-type oxidation treatment method for cyanogen-containing wastewater, which is mainly used for solving the problem of incapability of simultaneously treating other organic pollutants in wastewater and secondary pollution during cyanogen-containing wastewater treatment. In the invention, industrial wastewater of which the COD (chemical oxygen demand) value is 2000mg/l to 200000mg/l and the total cyanogen content is 10 to 20000mg/l and gases containing elemental oxygen are taken as raw materials which are in contact with a catalyst under the conditions that the reaction temperature is 230 to 300 DEG C, the reaction pressure is 3 to 10MPa, the liquid space velocity is 0.5-2.5 h<-1> and the volume ratio in a standard state of the gas and liquid materials is (70-300):1 , and therefore, the removal rate of the COD is larger than 95% and the total cyanogen is less than 5 ppm after processed, wherein the catalyst comprises at least one oxide carrier selected from TiO2, Al2O3, SiO2 or ZrO2 and at least one metal or oxide carried on the oxide carrier and selected from Pt, Pd, Ru, Ir or Rh in parts by weight. The problem is nicely solved with the technical scheme, and the catalysis wet-type oxidation treatment method for cyanogen-containing wastewater can be used in the industrial treatment of cyanogen-containing industrial wastewater.

The invention provides a method for purifying waste water and recovering waste materials on line in electroplating and chemical plating processes. The method comprises the following steps of: directly arranging a capacitance deionizer in a water washing device on a production line to adsorb various negative ions and positive ions in waste water during charging a battery so as to purify the waste water; and then releasing and recovering waste materials through electrode discharge so as to realize zero release of pollutants. The invention ensures that the capacitance deionization method is suitable for the manufacturing processes of various electroplating or chemical plating products through the optimization of process parameters. Through on-line purification and recycle of washing water, the burden of the traditional waste water treatment system is obviously reduced, meanwhile, the quality of plating pieces is guaranteed because the water quality of the washing water is obviously improved, and the classified recovery of waste materials can be achieved. The method can also obviously reduce the COD in the waste water and has wide application prospect in the fields of electroplating and chemical plating.

The invention belongs to processing of organic junk and organic waste water and resource technology field, more particularly relates to a method of producing biological active water by livestock and poultry dung urine. The invention utilizes rocks containing various mineral matters and humus to culture soil microorganism crowd with humification function for clearing environmental pollution of livestock and poultry dung urine at the same time, processed effluent can improve sprouting rate and germinating biability of paddy seeds apparently, can be applied to organic farm production, improvement of livestock and poultry drinking water on farm, environmental improvement of hut microorganism; applied to paddy may strengthen resistance of rice blast, raise edible taste value of paddy, applied to vegetable and fruit may raise output and quality, strengthen the ability of resistance disease, reduce even avoid the use of pesticide and chemical fertilizer; applied to farm may avoid that livestock and poultry use antibiotic to reduce production accident. The invention not only reduce environmental burden, but also has ability of restoration destroyed environmental; may form cycle type agriculture in area, promote development of organic agriculture.

The invention discloses a method for nitrogen abundance transformation treatment of wastewater with high ammonia nitrogen by utilizing mixotrophic microorganisms; with use of microbial cells, such as microalgae, photobacteria and other chemical energy bacteria, obtained from pre-culture or harvested from a culture system, mixotrophic microbial cells are subjected to rapid culture accumulation in an abundant nitrogen culture medium, and followed by mixotrophic microorganisms are harvested and are transferred to a nitrogen limited culture medium, are subjected to nitrogen limited culture for 2-4 days, finally are transferred into the wastewater with high ammonia nitrogen and are subjected to autotrophic growth under illumination conditions; because the mixotrophic microorganisms need to synthesize liposome for saving energy in the nitrogen limited process, and simultaneously degrade chloroplast and other organelles, in the abundant nitrogen transformation process under the illumination conditions, a large number of ammonia nitrogen nutrient sources are needed for synthesizing chlorophylls and other assemblies needed for photosynthesis, and thus the high-concentration ammonia nitrogen in the wastewater can be effectively removed, and the purpose of purifying the wastewater is achieved.

The invention discloses a waste gas treatment device for fabric dyeing and finishing equipment. The waste gas treatment device comprises a case body; a partition plate is mounted in a middle positioninside the case body, and a cyclone separator is mounted on one side of the upper surface of the partition plate; a controller is mounted on one side, relative to the cyclone separator, on the upper surface of the partition plate; a heat exchanger chamber is connected with one side of the cyclone separator through a pipeline; a dust collecting box is connected with the bottom end of the cyclone separator through the pipeline, and an air outlet pipe is connected with one side of the cyclone separator; a dust outlet is formed in one side of the dust collecting box. The waste gas treatment devicedisclosed by the invention has the benefits that a waste oil filter tank and a wastewater filter tank are arranged, so that the purification of wastewater and waste oil is realized, the recycling ofwater resources is realized, water resources are saved, and meanwhile, the pollution caused by the discharge of the waste oil is prevented, therefore, the waste gas treatment device is more environmentally friendly; as an arc-shaped inner wall is arranged, the water flow rate and the water flow state are changed, so that the fluidity of the oil and the water is improved, the generation of water scales on the inner wall is prevented, and the service life of the device is prolonged.

The invention discloses an application of Aglaonena Commutatum in purification of livestock and poultry breeding biogas slurry and belongs to the field of wastewater treatment. With Aglaonena Commutatum planted in a livestock and poultry breeding biogas slurry polluted environment, polluted substances such as NH4<+>-N, TN, TP, CODcr and the like in the livestock and poultry breeding biogas slurry are absorbed by Aglaonena Commutatum. Aglaonena Commutatum has strong vitality, can be directly planted, requires no special cultivation and has a characteristic of perennation. Therefore, the pollution of livestock and poultry breeding biogas slurry can be permanently solved. The application requires less investment and low operation cost, has a good effect, is simple and easy to operate, and can guarantee a purification effect of a constructed wetland system in winter. By the utilization of Aglaonena Commutatum for wastewater treatment, environmental protection is combined with landscape construction, which embodies sustainable development concepts of sewage treatment, ecological restoration, landscape construction and economic benefit which are all taken into consideration. The application provided by the invention is characterized by the combination of theoretical research and practical application, and is of profound importance.

The invention discloses application of zephyranthes candida in purifying livestock breeding biogas slurry, which belongs to the field of wastewater processing. The zephyranthes candida is planted in a livestock breeding biogas slurry pollution environment; and the function of the zephyranthes candida for absorbing pollution matters such as NH4+-N, TN, TP, CODcr in the livestock breeding biogas slurry, and the characteristics that the zephyranthes candida has tenacious vitality, can be planted directly, has no need to be managed specially, and is perennial are fully utilized, so that the problem of livestock breeding biogas slurry pollution is solved permanently. The investment is small, the operation cost is low, the effect is good, the operation is simple and easy to realize, the purifying effect in winter is ensured, and meanwhile, the secondary pollution can be avoided. The harvested zephyranthes candida has certain medicinal value, and can be used for treating febrile convulsion and epilepsy. The zephyranthes candida is utilized for processing wastewater, and the environment protection is combined with landscape construction and economic construction, so that a sustainable development idea taking consideration of sewage processing, ecological restoration, landscape construction and economic benefit is embodied, which is profound.

The invention discloses application of mentha haplocalyx in heavy metal waste water treatment and belongs to the field of waste water treatment. The technical scheme adopted by the invention is as follows: mentha haplocalyx is planted in a heavy metal waste water environment, the absorption effect of the mentha haplocalyx to pollutants such as Cr(VI), Zn(II) and the like in waste water and the characteristics of strong life force, direct planting, no special management and perennation of the mentha haplocalyx are utilized, the mentha haplocalyx is planted into the heavy metal polluted water environment, and heavy metal in the waste water is absorbed, thus the aim of purification is realized. According to the invention, the operating cost is low, the effect is good, the operation is simple and practicable, the purification effect is guaranteed while a new plant resource variety used for heavy metal waste water treatment is developed, and the mentha haplocalyx with medical value can be recycled and utilized, thus providing new thinking for deep development of heavy metal waste water treatment by adopting an ecological floating bed technology and achieving far-reaching significance.

The invention discloses an organic wastewater treatment device. The device comprises a treatment box and a filter frame; a partition plate is fixedly connected between the two sides of the inner wallof the treatment box; a U-shaped frame is fixedly connected to one side of the treatment box; a threaded rod is rotatably connected between the two sides of the inner wall of the U-shaped frame; and amotor is fixedly connected to the top of the U-shaped frame. According to the organic wastewater treatment device, a filter plate, the threaded rod and other devices are arranged, so that impuritiesfloating on the surface of the wastewater can be scraped off before the wastewater is filtered, and therefore, subsequent filtering burden can be alleviated, a filtering procedure is omitted, the filter plate on the surface is prevented from being cleaned and replaced, the purpose of convenient use is achieved; the impurities on the surface of the wastewater can be collected through an impurity frame, a water filter plate and other devices, centralized treatment is facilitated, meanwhile, the wastewater can be continuously discharged into the filter frame through the water filter plate, and subsequent treatment is facilitated.

The invention discloses application of pityrogramme calomelanos link in restoration of soil polluted by cadmium. The pityrogramme calomelanos link is planted in the soil polluted by the cadmium. Due to the absorption effect of the pityrogramme calomelanos link on the cadmium and tenacious vitality of the pityrogramme calomelanos link, the pityrogramme calomelanos link can be directly planted without special management, and the problem of cadmium pollution to the soil is solved permanently according to perennial characteristics. The pityrogramme calomelanos link has small investment, low operating cost and a good effect, is easy to operate and is practicable; secondary pollution can be prevented while a purification effect is ensured; the accumulated heavy metal can be recycled by an advanced technology, so that a certain economic benefit is created; and the pityrogramme calomelanos link is suitable to be popularized in a large area.

The invention relates to a method for purifying wastewater containing emulsion. The method is characterized by comprising six steps of demulsification air flotation, ultraviolet catalytic oxidation, pretreatment flocculation air flotation, facultative membrane biological reaction, post-treatment flocculation air flotation and Fenton oxidation reaction. By combination of the steps, the method has the advantages of good treatment effect and high treatment efficiency for the wastewater containing emulsion, high purification degree of treated wastewater and the like. Compared with conventional design, the emulsion which is high in treatment difficulty and stably dispersed is subjected to demulsification air flotation and ultraviolet catalytic oxidation treatment. Thus, biodegradability of theemulsion is improved, wastewater purification efficiency is improved, unnecessary waste caused by excessive input of treatment agents is also prevented, and the cost is saved. Meanwhile, Fenton oxidation reaction is placed at the end of the whole treatment process, and the running cost of wastewater treatment is reduced. The treatment method has high impact load resistance and is simple to operate.

The invention discloses a farm wastewater treatment device. The device comprises a box body, supporting blocks and a base, wherein the box body is fixed above the base through the supporting blocks; awastewater inlet pipe is mounted above the box body; a filter plate is arranged below the wastewater inlet pipe; one end of the filter plate is rotationally connected with a vertical plate fixed in the box body; the other end of the filter plate penetrates through an L-shaped connecting piece and is connected with a spring fixed at the upper part in the box body; and a fixed rod is fixed to the inner wall of the right side of the box body; a second motor is installed on the fixed rod; a second rotating rod is installed at the output end of the second motor; a shifting rod is installed on thesecond rotating rod; a third motor is installed on the vertical plate; and a third rotating rod located in the extrusion tank is installed at the output end of the third motor. Solid and liquid in thewastewater can be separated out, the solid and the liquid are separately treated, the wastewater treatment efficiency is improved, and the service life of the treatment device is prolonged.

The invention provides a preparation method for a nevirapine intermediate. The preparation method comprises: performing a cyclization reaction of ammonia water, methyl cyanoacetate and methyl acetoacetate to form a compound hydroxyl: 2,6-dihydroxy-3-cyano-4-methylpyridine; adding triethylamine dropwise, introducing chlorine gas at the temperature until the reaction is complete, and obtaining 2,6-dichloro-3-cyano-4-methylpyridine; adding concentrated sulfuric acid, heating to 120 DEG C to react for 3-5 h, and then cooling to 60 DEG C; adding water to perform hydrolysis reaction, and obtaining 2,6-dichloro-3-amido-4-methylpyridine; adding a degradation reagent sodium hypochlorite, and obtaining a nevirapine intermediate 2,6-dichloro-3-amino-4- methylpyridine by Hofmann reaction. According tothe preparation method, commonly used phosphorus oxychloride is replaced with the directly introduced chlorine gas, which solves the problems that the wastewater content is too high, it is difficultto perform treatment and the odor of phosphorus oxychloride is bad, and the one-time yield of the product is 90.1%.