741results about "Treatment of wastewater with pathogenic microorganisms" patented technology

The present invention is a system that recycles shower water to promote water conservation. The system comprises a plurality water valves for opening and closing water lines, sensors for temperature and presence of soap/shampoo/conditioner in the water, a heater, a filter means, and a control center. This system has the capability to monitor when the water is clean and then channels water to be recycled and supplemented with heating, filtering, and a percentage of fresh hot and cold (ambient) water. The control center continuously monitors the water for cleanliness or contaminated with soap products and can switch between a recycle mode and a non-recycle mode. The temperature sensor monitors the recycle water temperature and activates a heater to increase the temperature if needed.

The invention relates to a charcoal loading nanometer zero-valent iron activated sodium persulfate system and preparation and application thereof. Firstly, biomass is burned into charcoal, the charcoal is cleaned and dried after being acidized, and added into a ferrous sulphate solution taking absolute ethyl alcohol and water as a dispersing agent for being stirred fully, then a sodium borohydridesolution is added dropwise to generate the charcoal loading nanometer zero-valent iron; lastly, a composite material prepared with pure water and ethyl alcohol is washed and dried, the obtained charcoal loading nanometer zero-valent iron activated material is placed in the solution, after ultrasonic treatment is carried out, the material is uniformly dispersed in the solution, at the moment, a sodium persulfate solution is added, the mixture is mixed evenly to obtain the charcoal loading nanometer zero-valent iron activated sodium persulfate system. The oxidation system is used for reducing waste, polluted surface water and target pollutants in the underground water, and the problems of the agglomeration and lower activity of sodium persulfate during the use of the nanometer zero-valent iron are solved.

This invention relates a wastewater purifying system in hospitals, comprising interconnected grilles, a regulating disinfection pool, a coagulation pool, a preliminary settling tank, a hydrolysis-acidification pool, an aerobic bio-filter, a secondary settling tank, an advanced oxidation device, a sludge pool and a recycling impounding reservoir. The regulating disinfection pool is used to accumulate original wastewater released from every source and the advanced oxidation device is used to oxidize remained organic matters into inorganic molecules via chemical and biochemical methods or via physical methods and could be an electric biological oxidation treatment device. This system possesses high purifying degree and purified water from this system can be used as reclaimed water.

Supercritical water (SCW) systems and methods using the properties of supercritical water to allow a raw water stream including water and a contaminant to be purified. A supercritical water oxidation (SCWO), water purifier may generally include water and oxidizer (such as oxygen in air) pumping and mixing apparatus, a supercritical water reactor, and a system for separating the resultant purified water from other relatively harmless outputs of the supercritical water reactor.

The invention discloses a preparation method of a heavy metal adsorbent based on shrimp shell biomass charcoal with a high specific surface area. The preparation method comprises the following steps:washing collected waste penaeus vanmamei shrimp shells with tap water; removing various impurities; carrying out air drying, and drying; carrying out temperature-rising carbonization; mixing with hydrochloric acid and removing ash; after drying and sieving, carrying out KOH or ZnCl2 modification to prepare shrimp shell based biomass charcoal; then mixing with hydrochloric acid and removing ash; filtering, and washing and drying filtering dreg; sieving and filling into a bottle. The biomass charcoal can be used for adsorbing heavy metal ions in the wastewater. The preparation method disclosed by the invention has the beneficial effects that the preparation method is simple and low in cost and an obtained product has the high specific surface area and a strong adsorption capability; the adsorption capacity on Cr<6+> and Cd<2+> in wastewater which has the mass concentration of 10 to 400mg/L and contains heavy metal ions including Cr<6+>, Cr<6+> and the like reaches 20 to 320mg/L and the adsorption rate reaches 90 percent or above; the preparation method is suitable for being popularized and better applied in the field of water treatment.

A target compound treatment apparatus of a size capable of being mounted under a sink, the apparatus comprising a destruction zone in which an aqueous solution containing at least one target compound is exposed to a destruction agent adapted to convert the target compound into destruction byproduct; a filtration zone in which a filtration agent removes the destruction byproduct from the solution; and a flow inducer/pump adapted to cause the aqueous solution to flow through the apparatus. The destruction agent may comprise an acid, a base, an oxidizing agent, or a reducing agent. The destruction agent may be available on a surface of a solid substrate disposed within the destruction zone, or it may be available in a gaseous or liquid reagent that is admixed with the aqueous solution. The filtration agent may be comprised of an adsorption media such as activated carbon and/or other filtration means for removing destruction byproduct. The pump may be manually activated, or it may be activated by a sensor that detects a solution entering the apparatus.

Disclosed is a method and system for treating carbonaceous waste materials. The method includes contacting the waste with ozone in order to promote oxidation of the organic materials in the waste. The process can be carried out in a large waste storage facility such as a lagoon, a pond, or an aboveground storage facility. In one embodiment, the process can be utilized for treatment of waste in remote access locations, such as on shipboard or other remote or isolated locations. The method can be used in an on-going batch or continuous treatment process or can be used for remediation and reclamation of storage facilities. The invention is also directed to a self-contained unit capable of treating small amount of waste. The treatment unit can be used to treat waste in isolated areas such as, for example, medical waste generated in medical or research facilities.

The invention relates to a preparation method of a flower-like molybdenum disulfide and UiO-66 combined photocatalyst, wherein the method comprises the steps: by using zircon salt and an organic ligand as precursors and a polar solvent as a dispersing agent, preparing a white solid product, namely spherical UiO-66 nanoparticles, by a solvothermal method; then dispersing the spherical UiO-66 nanoparticles into distilled water to form a milk white solution; sequentially adding a molybdenum source and a sulfur source into the milk white solution, ultrasonically dissolving and stirring for 30 min,transferring into an autoclave with a polytetrafluoroethylene liner, heating at constant temperature, cooling to room temperature, and centrifugally separating to obtain a grey black product; and finally, washing the grey black product with absolute ethyl alcohol, and performing vacuum drying to constant weight to obtain the flower-like molybdenum disulfide and UiO-66 combined photocatalyst. Themethod is simple to operate, the raw materials are easy to obtain, the cost is low, and the obtained photocatalyst has excellent photocatalytic degradation performance.

The invention discloses a medical waste liquid treatment device and belongs to the technical field of medical waste liquid treatment. The device comprises an impurity removal box, wherein an impuritydischarging port is formed in the left side of the impurity removal box, a push rod is arranged in an inner cavity of the impurity removal box, the left end of the push rod extends to the left side ofthe impurity discharging port, a pull ring is mounted at the left end of the push rod, a filtering plate is mounted under a scraper plate, a liquid discharging pipe is mounted at the bottom of the right side of the impurity removal box, a water pump is mounted on the liquid discharging pipe, the other end of the liquid discharging pipe extends to the top of an inner cavity of a purification box,and a heating pipe is mounted at the bottom of the inner cavity of the purification box. The device effectively filters out impurities in a waste liquid, pollution to the environment is reduced, organic matter in the waste liquid can be effectively removed through an adsorbent resin layer in a filter vat, peculiar smell in the waste liquid is removed through an activated carbon adsorption layer, adisinfection device is used for disinfecting the waste liquid, besides, the heating pipe is arranged and used for high-temperature sterilization treatment on the waste liquid, so that the waste liquid meets the discharge requirements, and pollution to the environment is further reduced.

The present invention is directed to black TiO2 nanoparticles having H2-plasma induced surface defects. The surface defects generate mid-band gap states, which enable the black TiO2 nanoparticles to absorb visible and IR light. The enhanced visible and IR light absorption allows the black TiO2 nanoparticles to serve as photocatalysts in the solar-induced decomposition of pollutant organic compounds in water, an important application in water treatment systems. The present invention is further directed to a method of generating the black TiO2 nanoparticles utilizing H2-plasma to introduce surface defects without changing the oxidation state of the titanium in the nanomaterial.

The invention provides a temperature responsive composite material, a preparation method and application thereof. The method comprises the steps of: 1, preparation of a g-C3N4 photocatalyst; 2, preparation of a Fe3O4/g-C3N4 composite material by hydrothermal technology; 3, preparation of a temperature responsive composite material PNIPAM/Fe3O4/g-C3N4. In the invention, g-C3N4 is a novel organic visible light catalyst, also Fe3O4 nanoparticles have excellent conductive properties, and the introduction of Fe3O4 and the synergistic effect with g-C3N4 improve the photocatalytic effect. In addition, because of the unique temperature response performance of PNIPAM, the prepared temperature responsive composite material PNIPAM/Fe3O4/g-C3N4 has very good stability and activity controllability.

The invention discloses a medical sewage disinfection and purification device with the function of separating waste materials, which comprises a medical sewage treatment tank, a sewage sterilization tank, a filter cylinder, a sewage mixing tank and a diversion cylinder. The top of the medical sewage treatment tank is welded with a sewage mixing tank Tank, the bottom of the sewage mixing tank is welded with a collecting funnel, the bottom of the collecting funnel is connected to the diversion cylinder, the inside of the collecting funnel and the sewage mixing tank is set as a mixing chamber, and the top of the sewage mixing tank is welded with medical sewage input Pipe and disinfectant delivery pipe, a stirring motor is installed in the middle of the top of the sewage mixing tank, the rotating shaft of the stirring motor passes through the top wall of the sewage mixing tank to connect to the rotating shaft, and several stirring rods are vertically welded on the rotating shaft; Preliminary disinfection treatment of wastewater; realize the separation of sewage and waste; realize the integrated treatment of disinfection, sterilization, filtration and purification of medical sewage; good cleaning effect, avoid clogging; facilitate the discharge of medical waste and improve the convenience of cleaning.

The invention discloses a laboratory carbon tetrachloride separation treatment system and a treatment process thereof. The laboratory carbon tetrachloride separation treatment system comprises an activated carbon filter box with S-shaped adsorption tanks and a treatment region with a nano-bubble generator. The activated carbon filter box and the treatment region are arranged in an aeration reaction box and partitioned through a partition plate and are communicated through a flow guiding pipe. The S-shaped adsorption tanks are filled with activated carbon filler and internally provided with suspension plates, and one end of each S-shaped adsorption tank is provided with a water outflow pipe. One end of the aeration reaction tank is provided with a residual liquid inflow pipe. The laboratory carbon tetrachloride separation treatment system and the treatment process thereof have the advantages that due to the adoption of an oxidation, aeration and adsorption joint treatment mode, the treatment efficiency is high, and the high removal effect is achieved for high-concentration volatile substances containing tetrachloride laboratory residual liquid; in the adsorption process of activated carbon, the activated carbon filter tank is divided into the multiple S-shaped adsorption tanks through the suspension plates, the laboratory residual liquid containing carbon tetrachloride flows in an S-shaped path, the contact time of the residual liquid and the activated carbon is prolonged, meanwhile, the contact area of the residual liquid and oxygen is increased, and treatment efficiency is improved.

The invention discloses a medical sewage disinfection and purification device with a waste separation function. The medical sewage disinfection and purification device comprises a box body, wherein acircular through groove is arranged in the middle of the rear side of the box body; the inner periphery of the circular through groove is rotatably connected with the outer periphery of a rotating plate through a bearing; the front side of the rotating plate is fixedly connected with the rear end of a coaxial transverse shaft; the front end of the transverse shaft is rotatably connected with the corresponding inner wall of the box body; the outer periphery of the transverse shaft is uniformly hinged with one sides of a plurality of net plates; and scraping plates are fixedly arranged at the other sides of the net plates respectively. The medical sewage disinfection and purification device is simple in structure and ingenuous concept; the net plates are used for primary filtration, and finefiltering holes are used for advanced filtering, so filtering is hierarchically performed, and the filtering efficiency can be accelerated; impurities primarily filtered out are thrown out through rotation inertia and self gravity of the net plates, and the impurities in holes of the net plates are shaken off through vibration, while the impurities filtered out of the fine filtering holes are scraped off through the scraping plates, so effective filtering of the fine filtering holes is kept, and the filtering efficiency is further improved; thus, the medical sewage disinfection and purification device can meet the market requirements, and is applicable to popularization.

An inline dispenser and purification device combination comprising an inline dispenser having fluid ports directly mateable to the ports of a fitted cartridge and a universal cartridge having no ports for connection with the fluid ports of the inline dispenser and a method of replacing a fitted cartridge located within a inline dispenser with a universal cartridge having no ports for connection with the fluid ports of the inline dispenser.

The invention relates to a hospital wastewater treatment and resource recovery method. The method can effectively solve the problems of standard non-reaching of general nitrogen and phosphorus removal, no harmless stable treatment of residual sludge and no consideration of outlet water reuse or resource recovery of existing hospital wastewater treatment technologies. The method is characterized in that water discharged from a mixed tank enters an A/O/A biological treatment system and undergoes nitrogen, phosphorus and organic matter removal, water discharged from the A/O/A biological treatment system enters an MBR reactor and undergoes enhanced nitrogen and phosphorus removal treatment, sludge in the MBR reactor returns to the A/O/A biological treatment system, water discharged from the MBR reactor enters an ultraviolet disinfection tank in order to kill pathogens in the water, water discharged from the ultraviolet disinfection tank enters a clear water tank and is temporarily stored, most of the obtained clear water can be used for lawn greening and toilet flushing, and the remaining water can be discharged after standard reaching. The method realizes the recovery of resources and energy in the hospital wastewater, realizes the harmlessness, recycling and reducing purposes of byproducts in the hospital wastewater treatment process, and is an innovation in wastewater treatment methods.

The invention provides an iron-based catalyst for strengthening ozone oxidation of organic pollutants. The catalyst can efficiently catalyze the organic pollutants which are difficult to degrade by the ozone oxidation under the condition of low ozone concentration to remove difficultly degraded organic substances, and is prepared by taking natural zeolite, artificial zeolite or a zeolite-like material as a carrier loaded with active components, wherein the active components comprise ferrihydrite and delta-hydroxyl oxidize iron in a mass ratio of (20 to 80): (20 to 80); the invention further provides a preparation method of the catalyst and a method for treating wastewater by using the catalyst which can effectively remove antibiotics such as metronidazole difficult to degrade in hospital wastewater; furthermore, the invention improves a disinfection device of existing hospital wastewater, namely a filling layer of the iron-based catalyst is added in an ozone contact pool, thereby not only disinfecting wastewater, but also decomposing the antibiotics in wastewater without changing original operating parameters.

Treatment of an aqueous solution to yield a product is more desirable for disposal by an advanced oxidation process. Ozone is mixed with the solution, and maintaining at an elevated pressure for a time. The process may include recirculation past injector that injects ozone into the solution. Influent may be sewage, septage, leachate, ballast, and so on. The process disinfects and/or denutrifies the effluent. It may include (a) back-to-back processing of batches (b) overlapping processing with a previously treated batch (c) off-gassing (d) repetitive high pressure and low pressure cycles (e) post processing steps, such as retention without addition of ozone for a period of time to permit flocculates longer to form (f) post process filtering to remove flocculates (g) simultaneous post-processing of one batch while another batch is being processed. The process may include the treatment of solutions containing pharmaceuticals.

The invention provides a hospital sewage treatment integrated device and method. The hospital sewage treatment integrated device comprises a wastewater pool, a flocculation device, a super magnetic separation device, an ultrafiltration device, an activated carbon adsorption device and a clean water pool, all of which are connected in sequence. The hospital sewage treatment integrated device is simple in structure and small in occupied area. Hospital sewage is treated through the devices in sequence, required stay time is short, and the hospital sewage can be efficiently and quickly treated. The hospital sewage treatment method is simple in process, liquid passes through the wastewater pool, the flocculation device, the super magnetic separation device, the ultrafiltration device, the activated carbon adsorption device and the clean water pool in sequence, the stay time of the liquid in each device is short, and the treatment efficiency is high. A physical method is adopted for water treatment in the ultrafiltration device and the activated carbon adsorption device, no chemical agent needs to be added, the influence of environmental factors is small, raw materials are easy to obtain, and practical application is convenient.

A method of controlling Legionella bacteria in cooling water systems is described. The method involves the heating of recirculating cooling water to temperatures of 70° C. for sufficient time to kill the bacteria. The method functions best in combination with chemical bactericides.