49results about How to "Efficient removal rate" patented technology

The invention discloses a magnetic composite functional material with both adsorption and flocculation effects for high efficiency removal of Congo red in water and a preparation method thereof, and belongs to the technical field of dye wastewater treatment. The magnetic composite functional material is prepared by compounding three components of sepiolite, Fe3O4 and cetyl trimethyl ammonium bromide (CTAB). The preparation method is as follows: purified sepiolite is thermally modified, a bivalent and trivalent iron ion mixed solution is added for magnetic modification, and a cetyl trimethyl ammonium bromide (CTAB) solution is added for organic modification to obtain organically-modified magnetic sepiolite, namely the magnetic composite functional material. The preparation method has the advantages of low cost, simple operation and strong operability. The magnetic composite functional material is applied to the treatment of Congo red model wastewater, the concentration range is 100-4500mg / L, under the optimized conditions, the maximum removal capacity of the Congo red is 4478.92mg / g, and the removal rate is 96.49%-99.92%.

The invention provides a microbial sewage treating agent for deep synergistic purification of sewage and a preparation method. Anaerobic digestive bacteria-silicone colloidal particles are formed by anaerobic digestive bacteria, seaweed nutrients, silicone and a dispersing agent through mixing and granulation, meanwhile, high molecular weight polyethylene and porous ceramic powder are mixed and ground, then, denitrifying bacteria are added, a denitrifying bacterium premix is obtained, an inorganic adhesive is sprayed to the surfaces of anaerobic digestive bacteria-silicone colloidal particles,the anaerobic digestive bacteria-silicone colloidal particles covered with the inorganic adhesive and the denitrifying bacterium premix are rolled and mixed, granulation and pelletizing are performed, and the microbial sewage treating agent for deep synergistic purification of sewage is obtained. According to the method, the anaerobic digestive bacteria are immobilized through silicone and covered with a denitrifying bacterium premix film, the defect that denitrifying bacteria and anaerobic digestive bacteria have difficulty in playing a role in sewage is overcome, the removal process is simple, the removal efficiency is high, the preparation and use cost is low, and large-scale popularization and application can be realized.

The invention provides a device and a method for treatment and recovery of nitrogen and phosphorus in wastewater by utilizing a seawater desalination concentrate. The device comprises a housing, wherein an inclined plate settling device and a clear water outlet are arranged at the upper part of the housing, a water inlet pipe is arranged at the lower part of the housing, a diversion plate for segmenting a housing channel into a diversion area and a circulation area is arranged in the housing, a baffle plate is arranged above the diversion area, a sedimentation area is arranged above the baffle plate, an outlet of the water inlet pipe is opposite to the bottom of the diversion area, an inlet of the water inlet pipe is connected with sewage and the concentrated wastewater produced by desalination of seawater, a sludge hopper and a sludge discharge pipe are arranged at the bottom of the housing, and a first circulation pump is arranged between the sludge discharge pipe and the water inlet pipe. The invention relates to the device and the method for nitrogen removal, phosphorus removal and recovery of the nitrogen and the phosphorus by taking a technology of using the concentrated wastewater produced by desalination of the seawater and reutilizing the reaction with phosphate ions to generate magnesium ammonium phosphate and hydroxyapatite crystals to achieve the recovery of the nitrogen and the phosphorus as the core, so that the treatment problem of the concentrated wastewater produced by a seawater desalination device can be solved, and the waste of resources and energy consumption can be further reduced.

The invention discloses a cutting fluid treatment process, which mainly comprises the following steps: adding sodium hydroxide to adjust the pH value to 7.6-8.5, adding a demulsifier to carry out demulsification, and carrying out oil-water separation ultrafiltration membrane separation on the wastewater after the demulsification is completed; adding the supernatant into a photocatalysis tank, andcarrying out photocatalytic membrane dynamic catalytic treatment to obtain a treatment solution; and adding the salt scale corrosion inhibitor into the treatment solution, and conveying to a concentration device for cyclic distillation to remove the salt solution to obtain a distillate. By limiting the molar ratio of the preparation raw materials, limiting the weight ratio of the compound demulsifier and functionally modifying TiO2, the cutting fluid treatment process with an excellent decontamination effect is researched, has extremely high COD removal rate and oil removal rate on cutting fluid wastewater, is suitable for being popularized and used as a cutting fluid treatment process in the field of water treatment, and has a wide development prospect.

The invention discloses a non-Newtonian fluid thickening polishing method based on a magnetic field assist. The method comprises the following steps: S1: adding non-Newtonian fluid polishing liquid with magnetorheological properties into a polishing liquid tank, and immersing a polishing workpiece in the non-Newtonian fluid polishing liquid through a holding device with a driving system, and turning on a magnetic field generating device; S2: under the action of the driving system, driving the polishing workpiece to rotate by the holding device, enabling the polishing workpiece and the non-Newtonian fluid polishing liquid to move relative to each other, and cutting the surface of the polished workpiece by abrasive grains in the non-Newtonian fluid polishing liquid, thereby completing the polishing process. The invention further correspondingly provides a non-Newtonian fluid thickening polishing system based on the magnetic field assist. The non-Newtonian fluid thickening polishing method provided by the invention is low in consumables cost, high in polishing efficiency and good in polishing effect, and can realize ultra-precision polishing of the polished workpiece.

The invention discloses a nanofiltration composite membrane, a preparation method and an application thereof, and belongs to the field of wastewater treatment. The preparation method includes the following steps: A) preparing a 2D nanomaterial dispersion; B) first preparing a solution of a certain concentration of a polymer material, and continuously adding a poor solvent under stirring conditions, so that the polymer material undergoes a chemical reaction to obtain a negatively charged The dispersion of polymer gel particles; C) the nanomaterial dispersion in step A) and the dispersion prepared in step B) are blended, film-formed, dried, and then put into a certain concentration of alkaline solution and pure water Soak in the medium to obtain nanofiltration composite membrane. The nanofiltration composite membrane of the invention can realize efficient removal of heavy metal complex ions through the synergistic effect of pore size screening and charge repulsion. Moreover, the interception rate and flux have not changed significantly after long-term use, which is beneficial to popularization.

The invention provides a modified active carbon and a preparation method application thereof. The method comprises the following steps of: placing active carbon into a quartz pipe of a muffle furnace; filling nitrogen in the muffle furnace at room temperature for 1-2 hours, wherein the gas flow rate is 80-120ml / min; then heating the muffle furnace to 400-800 DEG C at the speed of 10 DEG C / min under the protection of the same nitrogen flow and maintaining for 1-4 hours; after the temperature is reduced to 25 DEG C, stopping filling the nitrogen; continuously filling air at the flow rate of 80-120ml / min for 1hour and taking out to obtain the modified active carbon. The modified active carbon is used as an adsorbent and used for removing organic pollutants in the process of water treatment, has the advantages of high purifying ability and long service life and particularly can solve the problem of poor maneuverability on high-concentration phenol endocrine distributing object polluted water by the traditional water treatment method.

A salt-tolerant denitrifying bacterium and its application, the invention relates to the technical field of environmental microorganisms. The invention aims to solve the technical problem that the nitrogen removal ability of the existing common denitrifying bacteria is inhibited by high salinity and cannot remove the nitrite nitrogen in the saline culture wastewater. The strain is Alishewanella sp.F2, which was deposited in the General Microbiology Center of the China Committee for the Collection of Microbial Cultures. The preservation date was March 25, 2019. The number is CGMCC No: 17433. The strain can denitrify and denitrify under saline conditions. The bacterial strain of the invention is used for removing nitrite nitrogen pollutants in water bodies.

The invention discloses thick oil-degrading bacteria and application thereof. The bacterial strain is Acinetobacter sp. GS02 collected by China Center for Type Culture Collection on July 8, 2010, with the collection number of CCTCC M 2010172. The bacterial colony of the bacteria is round, has smooth protrusions and neat edges, is off-white and has viscosity. The bacteria are sporeless coccobacillus when observed under an electron microscope. The bacteria have the biological characteristics of oxidase negative, catalase positive, gram stain negative, no fermentation and obligate aerobe. The bacterial strain has good effect of removing alkane components, nonbiodegradable pristine and phytane in thick oil, and has high-efficiency thick oil removal rate and good adaptive capacity to environment compared with other bacterial strains. Based on the characteristics, the bacteria can be well applied to the restoration of thick oil-polluted water and soil.

The invention discloses a bacterial cellulose membrane / porous carbon adsorbent and its preparation. The adsorbent uses bacterial cellulose membrane as a substrate, and different sugars as carbon sources. The bacterial cellulose membrane / porous carbon adsorbent is prepared by hydrothermal carbonization. Due to the anchoring effect of a large number of hydroxyl groups on the surface of bacterial cellulose, the porous carbon It can be better dispersed in the bacterial fiber membrane, and at the same time, different sizes of nanopores can be obtained by adjusting the growth process of the cellulose membrane. The adsorbent of the present invention combines the dual functions of membrane nano-pore filtration and porous carbon adsorption, and is used to adsorb and remove PM2.5 smoke dust and toxic gases. The adsorbent has the advantages of environmental protection and high efficiency.

The invention discloses a method for treating catalytic ozone oxidation water. The method comprises the following steps of: (1) adding hydrogen peroxide and Ti4+ containing soluble compounds to waste water which contains organic substances and of which the pH value is adjusted to be between 0.5 and 3.5, and stirring the waste water for complete dissolution to obtain the mixed solution, wherein the organic substances are one or a mixture selected from acetic acid, acetophenone, oxalic acid and methyl benzene, and the mass ratio of charging materials of the organic substances of the H2O2 and the Ti4+ is 1:0.05-2:0.01-0.5; and (2) adding the mixed solution obtained at the step (1) to an ozone reactor, and filling ozone to the ozone reactor for degradation reaction. The method has the advantages of easy operation, high removal rate of organic substances, high utilization ratio of ozone, good economy and feasibility and the like.