Abstract: The present invention discloses a filtering device used for removing impurities in a mixture of biological diatomite, which relates to the technical field of sewage treatment. This device includes a plurality of deflectors evenly distributed in multiple layers in the vertical direction. Each deflector includes a shell and a top plate. There is a filter unit symmetrically arranged on the left and right sides of each deflector. The top of the shell is covered with a top plate hinged with the depressed plate. The bottom of the shell is provided with water inlets which communicate with the shunt pipe, and the upper parts of the left and right side walls of the shell are provided with overflow ports. The shell also has a plurality of diversion folding plates located below the overflow ports and vertically staggered and distributed on the left and right side walls. The filter unit includes an inclined water guiding groove and a filtering plate.

Abstract: A device for decomplexation and enhanced removal of copper based on self-induced Fenton-like reaction constructed by electrochemistry coupled with membrane separation is disclosed. The device includes a reactor, two electrocatalytic anodes capable of generating hydroxyl radicals, an electrocatalytic cathode membrane assembly, a direct current power supply, an aeration system, an inlet pipe and an outlet pipe. The device of the present invention has a simple construction. Using this device to treat industrial wastewater containing copper complexes under specific conditions allows the decomplexation and the removal of the industrial wastewater containing the copper complexes to be simultaneously realized at a low consumption and a high efficiency. The coupling of electrochemistry with membrane separation can be achieved to protect the cathode from being contaminated by pollutants in the sewage and prolong the service life of the electrode.

Abstract: A flexible electrocatalytic membrane for removing nitrate from water, a preparation method and use thereof are provided. The method of the present invention includes dropwise adding an aramid fiber solution into deionized water to prepare an aramid nanofiber sol, then reacting an ethanol solution containing 3,4-ethylenedioxythiophene and ferric nitrate with the aramid nanofiber sol to prepare a conductive aramid nanofiber sol, and finally dropwise adding MXene nanosheets ultrasonically pretreated by a tetramethylammonium hydroxide solution into the conductive aramid nanofiber sol to prepare the flexible electrocatalytic membrane. The prepared flexible electrocatalytic membrane possesses good mechanical strength and flexibility, and can not only effectively remove nitrate but also avoid failure of electrocatalytic materials due to surface fouling in the process of electrocatalytic reduction of nitrate, and thus has a long service life.

Abstract: A method for assembling and synthesizing Cu2O particle-supported porous CuBTC includes the following steps of: 1) dissolving polyvinylpyrrolidone (PVP) in ethanol solution to obtain a PVP-ethanol solution; 2) dissolving copper salt in distilled water, and mixing with trimesic acid, salicylic acid, and the PVP-ethanol solution obtained in step 1) under stirring; and 3) conducting a hydrothermal reaction on the mixed solution obtained in step 2) at 120° C. to obtain Cu2O particle-supported porous CuBTC. The new method introduces salicylic acid during the synthesis of CuBTC. The salicylic acid, as a ligand precursor, forms a porous CuBTC material through the unsaturated coordination of a ligand under the catalysis of Cu ion. The resulting porous CuBTC supported with ultrafine Cu2O nanoparticles can adsorb high-energy molecules and exhibit excellent crystallinity, porosity, and stability.

Abstract: A method for enhancing biochemical water treatment by a powder carrier includes: (i) screening the powder carrier by removing impurities to obtain a screened powder carrier; (ii) dissolving the screened powder carrier by stirring to prepare a slurry, enabling the screened powder carrier to completely absorb moisture to obtain a soaked powder carrier slurry; (iii) adjusting the pH value and adding the soaked powder carrier slurry into a bioreactor or a biological reaction structure; (iv) distributing the soaked powder carrier slurry uniformly through a hydraulic agitation; (v) loading a microorganism on the inner pore and wrapping on the surface of the soaked powder carrier slurry to obtain powder-loaded biological floccules; (vi) settling the powder-loaded biological floccules in a sedimentation zone and separating the powder carrier from the microorganism for reuse.

Abstract: A recovery system of composite powder carrier in HPB municipal wastewater treatment includes a biochemical tank and a concentration tank. The composite powder carrier is added to the biochemical tank for biochemically treating on the wastewater. The mixed liquid is then made to flow into the concentration tank. The supernatant obtained after filtration is then discharged. The concentrated sludge is returned to the biochemical tank, and the excess concentrated sludge is transported to a separator. The separator separates the substances with large specific gravity from those having smaller specific gravity, and the substances with large specific gravity are recycled to the biochemical tank for reuse. Matter having smaller specific gravity is discharged. The separator can be used to separate the composite powder carriers for recycling, which improves the utilization rate of the composite powder carriers and reduces the operation cost of the HPB technology for wastewater treatment.

Abstract: The present invention relates to microbial carriers for wastewater treatment, and in particular, relates to an organic composite powder carrier and its application for strengthening biological denitrification in municipal wastewater treatment. The organic composite powder carrier is compounded by a microbial carrier with a relatively large equivalent particle size and an organic alternative carbon source in the form of ultrafine powder. The composite powder carrier in the present invention includes a dedicated organic alternative carbon source, such as polyhydroxyalkanoates (PHA). The organic alternative carbon source can exclude the competitive relationship between microorganisms to ensure that denitrifying bacteria exclusively obtain electron donors required for denitrification.

Abstract: A resource treatment system for urine and feces separation and recovery in urine diversion dehydration toilets, includes a urine-faeces division toilet, a urine and gray water treatment system, and a fermentation and biodegradation fecal system. The urine-faeces division toilet is configured to separate and recover urine and feces discharged by users. The urine and gray water treatment system includes an adjusting pool, a microalgae culture device and a metal-based electrogenerated dynamic membrane. The adjusting pool is configured to receive the urine in the urine-faeces division toilet and domestic sewage, and adjust a urine-to-domestic sewage ratio. The metal-based electrogenerated dynamic membrane includes a metal microfiltration membrane, a stainless-steel mesh and a power supply. The fermentation and biodegradation fecal system includes a collection and adjusting device, a fermentation bed and a biodegradation chamber.

Abstract: A thin-film composite polyamide reverse osmosis membrane with anti-bacterial and anti-biofouling effects and a preparation method thereof are disclosed. The preparation method includes: dissolving a highly water-stable metal organic framework CuBTTri in an n-hexane solution containing trimesoyl chloride by ultrasonic wave, immersing a polyethersulfone ultrafiltration membrane in an aqueous solution of m-phenylene diamine and taking out, and then immersing the ultrafiltration membrane in the trimesoyl chloride-n-hexane solution containing the aforementioned metal organic framework for reaction and modification, so as to obtain the thin-film composite polyamide reverse osmosis membrane. The resulting composite reverse osmosis membrane integrated with the anti-bacterial metal organic framework CuBTTri has a high reverse osmosis membrane permeability and possesses greatly improved and persistent anti-bacterial and anti-biofouling properties.

Abstract: An electrochemical membrane module for selectively removing pollutants and a preparation method thereof are provided. A Ti/SnO2—Sb substrate electrode is coated with a MI-TiO2 sol-gel by means of a dip-coating method, and then sintered to obtain a molecular imprinting type Ti/MI-TiO2/SnO2—Sb coated electrode; the coated electrode is adhered to a ceramic micro-filtration membrane using epoxy resin glue to obtain a Ti/MI-TiO2/SnO2—Sb MI-anodic conductive composite membrane; the MI-anodic conductive composite membrane is used as an anode, and a titanium mesh is used as a cathode, so that the electrochemical membrane module capable of selectively removing pollutants is obtained. The invention effectively combines an electrochemical micro-filtration membrane and a molecular imprinting technique. When the electrochemical membrane module is used, suspended particles and refractory organics in the sewage are removed, and a highly selective removal of certain refractory pollutants can be achieved.

Abstract: A nanofiltration membrane with a high flux for selectively removing hydrophobic endocrine disrupting chemicals and a preparation method thereof are provided. The method includes the following steps: immersing a porous support layer into a first solution, removing excess droplets from a surface of the support layer after taking the support layer out of the first solution, and then immersing the support layer attached with the first solution into a second solution for an interfacial polymerization reaction, followed by washing after completion of the reaction to obtain the subject nanofiltration membrane. The first solution is an aqueous solution containing a polyamine monomer and an acid binding agent, and the second solution is an organic solution containing an acid chloride monomer and a metal-organic framework.

Abstract: The present disclosure relates to a primer and a kit for rapid detection of bacteria and an application thereof, belonging to the technical field of bacterial detection. The present disclosure provides a primer for rapid detection of bacteria, a nucleotide sequence of a forward primer for the detection is shown in SEQ ID NO.1, and a nucleotide sequence of a reverse primer is shown in SEQ ID NO.2; a degenerate base W=A/T in the forward primer, and a degenerate base R=A/G in the reverse primer. The primer of the present disclosure may achieve rapid, wide, high-sensitivity and quantitative detection of bacteria, can be applied in the field of bacterial detection, and is more suitable for the clinical research and application of cells and stem cell-based products.

Abstract: An image coding method and apparatus and an image decoding method and apparatus are provided by the present document. The image coding method includes: implementing matching coding for pixels of an input video image to obtain one or more matching relationship parameters, herein the matching relationship parameters are parameters used in a process of constructing predicted values and/or reconstructed values of the pixels in the image; mapping the matching relationship parameters to obtain mapped values of the matching relationship parameters; and performing entropy coding on the mapped values of the matching relationship parameters. The present document addresses the problem existing in the conventional art which is caused by the direct implementation of entropy coding for matching relationship parameters and achieves a good data compression effect through entropy coding.

Abstract: Provided is an encoding and decoding method and device for data compression. The encoding method includes: adaptively selecting a constrained string mode from a plurality of preset constrained string modes; and performing, according to the selected constrained string mode, string-matching encoding on a coding block to obtain information of a constrained string encoded in the selected constrained string mode and to obtain a bitstream of a syntax element of the constrained string encoded in the selected constrained string mode.

Abstract: The invention relates to a method for person re-identification based on deep model with multi-loss fusion training strategy. The method uses a deep learning technology to perform preprocessing operations such as flipping, clipping, random erasing and style transfer, and then feature extraction is performed through a backbone network model; joint training of a network is performed by fusing a plurality of loss functions. Compared with other deep learning-based person re-identification algorithms, the present invention greatly improves the performance of person re-identification by adopting a plurality of preprocessing modes, the fusion of three loss functions and effective training strategy.

Abstract: A method for treating wastewater containing fluoroquinolone antibiotics by activating peroxyacetic acid heterogeneously with lanthanum ruthenate perovskite (LaRuO3) catalyst. The method includes: adding peroxyacetic acid to wastewater containing ciprofloxacin, mixing to obtain a peroxyacetic acid solution, adjusting a pH of the peroxyacetic acid solution; and adding lanthanum ruthenate perovskite to the peroxyacetic acid solution to obtain a mixed solution, and stirring the mixed solution in a constant temperature shaker, and removing the ciprofloxacin at a normal temperature.

Abstract: The present invention provides a method and system for preparing fuel gas by utilizing an organic waste with high water content. The method comprises the following steps: 1) providing an organic waste with high water content; 2) performing hydrothermal reaction by using the organic waste with high water content as a reactant to obtain a hydrothermal reaction product; 3) enabling the hydrothermal reaction product to generate steam, and separating a solid product and an oily liquid product in the hydrothermal reaction product; 4) performing gasification reaction by using the solid product, the oily liquid product and the steam as reactants to obtain a gasification reaction product; and 5) purifying the gasification reaction product to obtain clean fuel gas. The present invention further provides a system for preparing fuel gas. The method can be used for preparing clean fuel gas from the organic waste with water content of 60% or more.

Abstract: Disclosed are an image encoding and decoding method, image processing device, and computer storage medium, comprising: entropy-encoding a plurality of replication parameters of a current encoding block according to their order after adjustment, to generate a video code stream comprising information of the plurality of replication parameters; said plurality of replication parameters comprising one or more types of replication parameter components. Parsing the video code stream, comprising the information of the plurality of replication parameters, of a decoding block; entropy-decoding said plurality of replication parameters to obtain binary code of said plurality of replication parameters; adjusting said binary code to obtain the values of said plurality of replication parameters; said plurality of replication parameters comprising one or more types of replication parameter components.

Abstract: The present invention relates to a loaded-to-frame detection equipment for backfill grouting of a shield tunnel, including an automatic loaded-to-frame transmission apparatus, a ground penetrating radar, and an intelligent backfill grouting processing and analysis software. The equipment is integrated by using software and hardware, and can implement real-time visual detection of a backfill grouting layer in a shield construction process. The loaded-to-frame automatic transmission apparatus mainly includes a track, a synchronous belt, a transmission mechanism, a servo machine, and a drive and reducer; and a new air-coupled radar detection apparatus is carried on the loaded-to-frame automatic transmission apparatus and is installed on a shield frame. With the shield performs tunneling, circular detection on a grouting body of the shield and visual layered display of the grouting body are implemented.

Abstract: A method for treating organic wastewater includes: proceeding with anaerobic fermentation on organic wastewater to obtain a fermentation liquid; nitrifying a portion of the fermentation liquid to obtain a first fermentation liquid containing nitrate nitrogen, and separating the remaining portion of the fermentation liquid to obtain a second fermentation liquid containing propionic acid; mixing the first and second fermentation liquids to obtain a mixture; and removing nitrogen and phosphorus from the mixture and then proceeding with sedimentation to obtain a sediment and a supernatant discharged as purified water. An organic wastewater treating system includes an anaerobic fermentation reactor, an aeration tank, a fermentation liquid separating equipment, a biological removal reactor for removing nitrogen and phosphorus, and a sedimentation tank.