Abstract: Disclosed is a method for preparing a fully-degradable non-woven fabric by spun-bonding, including: (S1) preparation of a poly(caprolactone-co-lactide acid) (P(CL-co-LA)); (S2) preparation of a copolymerized-modified poly(lactide acid) (PLA); and (S3) preparation of a full-degradable non-woven fabric using a spun-bond method. In this disclosure, the PLA is modified in gradient several times to prepare the full-degradable non-woven fabric in combination with an optimized spun-bonding method.

Abstract: The present disclosure relates to a scaling-resistant and yellowing-resistant composite reverse osmosis membrane and a preparation method thereof. By modifying the stability and yellowing of a coating of the reverse osmosis membrane, and grafting 2-(methacryloyloxy)ethyl)dimethyl-3-sulphoproyl) ammonium hydroxide (MEDSAH) and ethylene glycol methacrylate (EGMA) as amphoteric monomers and N-(isobutoxymethyl)acrylamide (IBMA) as yellowing-resistant particles on a surface of the reverse osmosis membrane using active polymerization, the present disclosure forms a three-network high-performance PMEDSAH/PEGMA/PIBMA composite coating. By active regulation of a polyamide (PA) layer through the three systems, the reverse osmosis membrane has high compatibility due to PMEDSAH, and stability, high hydrophilicity and anti-protein fouling property due to PEGMA, as well as yellowing-resistant property by coating PIBMA on the surface.

Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.

Abstract: A heat exchanger end cover integrated with a rubber ball cleaning apparatus is disclosed, including a ball collector and a booster pump which are arranged outside the heat exchanger end cover, and a ball-receiving filter screen arranged inside the heat exchanger end cover. The heat exchanger end cover is connected to a cooling water inlet pipe joint and a cooling water outlet pipe joint, the cooling water inlet pipe joint is provided with a water suction port and a ball-dispensing port, and the cooling water outlet pipe joint is provided with a water discharge port and a ball-receiving port.

Abstract: The application provides a compact precision angular-displacement-limiting impact-resistant vibration-isolating buffering platform for compact optoelectronic equipment. The platform comprises an optoelectronic equipment mounting plate and a bottom mounting plate, the optoelectronic equipment mounting plate and the bottom mounting plate are coupled via an angular-displacement-limiting assembly and a vibration-isolating buffering assembly, the vibration-isolating buffering assembly comprises a horizontal axial vibration-isolating buffering device and a vertical axial vibration-isolating buffering device, the vertical axial vibration-isolating buffering device has a vertical elastic supporting center O which is coincided with a mass center C, and the horizontal axial vibration-isolating buffering device has an elastic supporting plane which approaches to be coincided with a horizontal plane of the mass center.

Abstract: A formation of a biofilm is suppressed in piping having a relatively small liquid flow rate. A liquid processing nozzle connected to a liquid piping between a handpiece and a water supply source piping includes a nozzle body in which a liquid inlet, a liquid outlet, and a liquid flow path communicating the liquid inlet and the liquid outlet are formed, and a plurality of protrusions protruding from an inner surface of the liquid flow path into the liquid flow path. The protrusions are arranged so that protrusion amounts from the inner surface of the liquid flow path into the liquid flow path gradually increase as they go from an upstream side to a downstream side of the liquid flow path in a liquid flow direction from the liquid inlet to the liquid outlet.

Abstract: A combined logic control circuit and a sewage treatment system are provided. The combined logic control circuit includes: at least one signal input component, a control component and at least one signal output component; each signal input component transmits at least one path of first communication signal in a photoelectric isolated manner and converts the first communication signal into a second communication signal; the control component generates at least one path of first control signal according to the at least one path of second communication signal; and each signal output component processes one path of the first control signal to control at least one external electrical device, thereby implementing a particular circuit function; and the power switch component provides power supply to the various circuit components in a photoelectric isolated manner.

Abstract: A flow guide mesh has a water inlet side and a water outlet side opposite to each other, wherein a first water isolating material is provided on the water inlet side of the flow guide mesh to seal a part of the water inlet side, and an effective water inlet width is defined on the water inlet side, a second water isolating material is provided on the water outlet side of the flow guide mesh to seal a part of the water outlet side, and an effective water outlet width is defined on the water outlet side. In addition, the flow guide mesh has a comb-like structure comprising at least one comb tooth within the effective water outlet width of the water outlet side. Also disclosed are a membrane element and a filter assembly.

Abstract: The present invention discloses an apparatus for separating and removing dust from exhaust gas, and specifically relates to the field of exhaust gas handling technologies. The apparatus includes a rack, where a dust removal cylinder is disposed on an upper portion of an inner side of the rack, a filter cylinder is detachably connected to a middle portion of a bottom end of the dust removal cylinder, a dust removal mechanism is disposed inside the dust removal cylinder, the dust removal mechanism includes a guide column, an upper end of the guide column is fixedly mounted in a middle portion of an upper end of the rack, several grooves are disposed on an outer side of the guide column, and the groove includes a lower portion.

Abstract: The present disclosure provides a resource utilization method of crude sodium sulfate. The method comprises the following step: reducing the crude sodium sulfate to form a sodium sulfide solution; making the sodium sulfide solution perform a first reaction with chlorine to obtain sulfur and a sodium chloride solution; and electrolyzing the sodium chloride solution to obtain a sodium hydroxide solution and chlorine, and supplying the generated chlorine to the sodium sulfide solution to perform the first reaction.

Abstract: A reaction column comprises a plurality of cells each of which has a lower cell portion and an upper cell portion. The cells are arranged sequentially, from an uppermost cell to a lowermost cell. The fuel inlet is configured to direct fluid through the reaction column from a lower cell portion of the lowermost cell to an upper cell portion of the uppermost cell, and out of the fuel outlet. The reagent inlet is configured to direct reagent through the reaction column from the upper cell portion of the uppermost cell to the lower cell portion of the lowermost cell. The plurality of cells may be vertically or horizontally positioned, as well as inclined and the like. Systems and methods are likewise disclosed.

Abstract: A deep denitrification treatment system for wastewater by A2O based on high-oxygen three-phase contact is provided, including an annular anaerobic treatment device, a uniform water distribution device, a high-oxygen three-phase contact biological oxidative degradation device, a nitrification liquid collecting and shunting device, an annular nitrification liquid anoxic nitrification device and a sludge sedimentation reflux clean water discharge device sequentially connected between a water inlet and a water outlet, where the annular anaerobic treatment device surrounds a periphery of the annular nitrification liquid anoxic nitrification device, the annular nitrification liquid anoxic nitrification device surrounds a periphery of the sludge sedimentation reflux clean water discharge device, and an upper part of the sludge sedimentation reflux clean water discharge device is sequentially provided with the nitrification liquid collecting and shunting device, the high-oxygen three-phase contact biological oxidativ

Abstract: An air injection enthalpy-increasing scroll compressor is provided. The compressor has a main frame, a movable scroll plate and a stationary scroll plate. The movable scroll plate has a movable plate end plate and a movable scroll wrap arranged on a side end face of the movable plate end plate. A back pressure chamber is defined between the movable plate end plate and the main frame. The stationary scroll plate has a fixed scroll end plate and a stationary scroll wrap arranged on a side end face of the fixed scroll end plate. The stationary scroll wrap and the movable scroll wrap are engaged with each other to form crescent-shaped compression cavities. The movable scroll plate and the stationary scroll plate are provided with medium pressure passages that, during the rotation of the movable scroll plate, communicate the compression cavity with the back pressure chamber.

Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.

Abstract: Compositions comprising a blister pack, a container dimensioned to hold the blister pack and a pharmacological agent activity mitigation component are provided. Also provided are methods of making and using the compositions.

Abstract: The invention relates to the field of industrial wastewater treatment, and particularly discloses a nanofiltration membrane for treating printing and dyeing wastewater and its preparation method. The preparation method comprises the following steps: S1, pouring an aqueous solution containing m-phenylenediamine, camphorsulfonic acid and triethylamine onto the surface of a polysulfone ultrafiltration membrane, setting still for 10 s to 30 s, and then removing the excess aqueous solution from the surface; S2, pouring an organic solution containing trimesoyl chloride and an interface auxiliary polymerization agent onto the surface of the membrane obtained in step S1, reacting for 5 s to 20 s, and then removing the excess solution from the surface; and S3, setting the membrane obtained in step S2 still and then carrying out heat treatment and water rinsing on the membrane in sequence, thus obtaining the nanofiltration membrane.

Abstract: A wearable radon detector is an apparatus that measures radon exposure around a user. The apparatus includes a housing, an elongated plate, and a radon-detecting foil strip. The housing contains the elongated plate and the radon-detecting foil strip. The elongated plate positions and maneuvers the radon-detecting foil strip. The housing includes a receptacle portion, a storage portion, a first breakaway line, a plate-receiving slot, and a plurality of air passages. The elongated plate includes a grasping member, a setting member, and a second breakaway line. Radon collects within the receptacle portion through the plurality of air passages. The storage portion shields the radon-detecting foil strip once setting member has been slid from the receptacle portion and into the storage portion, the receptacle portion has been separated from storage portion along the first breakaway line, and the grasping member has been separated from the setting member along the second breakaway line.

Abstract: The present invention is a process, a method, and system for recovery and concentration of dissolved ammonium bicarbonate from a wastewater containing ammonia (NH3) using gas separation, condensation, and crystallization, each at controlled operating temperatures.