34 results about "Anoxic waters" patented technology

The invention discloses an underwater swimming type jet oxygen-increasing machine. The underwater swimming type jet oxygen-increasing machine is characterized by comprising an underwater pump positioned below the water surface of a water body, a supporting plate for supporting the underwater pump, a positioning float bowl for adjusting the depth of the underwater pump, a positioning anchor for keeping the underwater pump at a selected position in the water body and a waterproof trailing cable with adjustable length for controlling an underwater swimming radius of the underwater pump. A middle opening of a three-way valve on the underwater pump is communicated with a water outlet of the underwater pump; the openings at both sides of the three-way valve on the underwater pump are respectively communicated with a sector diversion tube; the sector diversion tube is provided with a plurality of jet devices uniformly distributed along the radial direction; the jet devices are provided with air inlet tubes the openings of the upper end of which extend from the water surface; and the positioning anchor is positioned at the middle zone of the water body. The invention has the advantages of being capable of solving low energy oxygenation of anoxic water at the middle and bottom layers with a large scope, pushing the water body to do circular motion simultaneously, and generating downwelling and vertical convection so as to improve circulation of the water body and ecological restoration and realize pumping function.

The invention provides an attapulgite-loaded zero-valent iron repair material. The attapulgite-loaded zero-valent iron repair material uses attapulgite as a carrier; zero-valent iron is of monodisperse spherical or ellipsoidal morphology; and the average particle size of the zero-valent iron is in a range of 50 to 150 nm. A preparation method for the attapulgite-loaded zero-valent iron repair material comprises the following steps: (1) successively adding a ferric salt or/and a ferrous salt and attapulgite into oxygen-free anoxic water and carrying out stirring under the protection of inert gas so as to obtain mixed liquid; and (2) adding a reducing agent into the mixed liquid and carrying out stirring and solid-liquid separation so as to obtain a solid, i.e., attapulgite-loaded zero-valent iron. The attapulgite-loaded zero-valent iron prepared in the invention can make full use of interlayer and surface space of attapulgite, has better dispersibility and stability and more uniform particle size distribution, is not prone to particle agglomeration and autoxidation and presents better suspensibility and stability in an aqueous solution; and when applied to pollutants, the attapulgite-loaded zero-valent iron has longer reaction time and better adsorption capability.

The invention discloses a denitriding microbial nest based on basalt fiber filling materials and a culture method thereof. The denitriding microbial nest is attached onto a basalt fiber beam, and sequentially comprises an aerobic layer, an anoxic layer, an anaerobic layer and the like from outside to inside. Through the combination of the basalt fiber filling materials, a bioreactor and an aerator, the sewage is treated; the air and active sludge realize the strong mixing through the aerator; an ascending flow is generated; circulation flows are formed at the two sides of the basalt fiber filling materials; under the hydraulic effect, the basalt fiber beam performs coating and support on the active sludge attached onto the surface of the fiber beam; under the layered coverage of the basalt fiber on the active sludge, the spherical or spheroid active sludge microorganism aggregates, i.e., the denitriding microbial nests are gradually formed. The denitriding microbial nests are subjected to domestication culture; the goal of removing nitrogen in the sewage is achieved.

The invention discloses a CoMoO4/g-C3N4 composite photocatalyst. The photocatalyst is two-dimensional lamellar g-C3N4 loaded with a certain amount of CoMoO4 nanorods; and the loading capacity of the CoMoO4 nanorods on g-C3N4 is 5-15 mass%. The invention also discloses a preparation method of the CoMoO4 /g-C3N4 composite photocatalyst and an application of the photocatalyst in the adsorption and degradation of humic acid in anoxic water. The CoMoO4/g-C3N4 composite material has a good adsorption and degradation ability to humic acid in water under visible lights, and the CoMoO4/g-C3N4 can effectively activate persulfate to generate sulfate radicals when the persulfate exists in water in order to further improve the ability to degrade organic pollutants in water.

The invention relates to a ducted high-pressure high-concentration gas-liquid dissolver for the renovation of a water environment, which is a water quality protection and renovation device used for the deterioration of water quality caused by the consumption of in-water dissolved oxygen of an environmental water area. As shown in picture 1, the ducted high-pressure high-concentration gas-liquid dissolver mainly comprises a high-pressure submersible pump 1, a ducted high-pressure gas-liquid dissolution cabin 3, a high-pressure oxygen gas overflow and emission component 11 and a tail oxygen-enriched water ejector 15, wherein anoxic water in an anoxic water area is sucked in through the high-pressure submersible pump and is pressurized to move into the ducted high-pressure gas-liquid dissolution cabin; when passing through a duct of the high-pressure gas-liquid dissolution cabin, the anoxic water is mixed with oxygen gas emitted by the high-pressure oxygen gas overflow and emission pipe; the oxygen can be quickly dissolved in the duct of the high-pressure gas-liquid dissolution cabin at high pressure, thus forming oxygen-enriched water; and the oxygen-enriched water passes through the narrow tail ejector and is horizontally ejected to the anoxic water area of the same layer, thereby improving and renovating the water ecology. Meanwhile, due to the counterforce of the backward ejection of the oxygen-enriched water, the dissolver can be pushed to slowly advance, so that the water quality of more areas can be improved and renovated.

The application relates to a method for remediation and/or restoration of an anoxic body of water (10), wherein a calcium nitrate solution (3) is added to the anoxic body of water (10), and wherein the method comprises the steps of mixing water having a percent of oxygen saturation of between 50% and 150% with the calcium nitrate solution (3), resulting in a mixture, and pumping the mixture into the anoxic body of water (10), wherein the final concentration of nitrate-N in the remedied and/or restored anoxic body of water (10) is between 1 and 20 mg/l. The application furthermore relates to a system (1) for remediation and/or restoration of an anoxic body of water (10), wherein the system (1) is provided with means to add a calcium nitrate solution (3) to the anoxic body of water (10), wherein the means to add the calcium nitrate solution (3) to the anoxic body of water (10) consists of a mixing device (2) arranged to mix the calcium nitrate solution (3) with water having a percent of oxygen saturation of between 50% and 150%, resulting in a mixture, and wherein the system (1) comprises first pumping means (5) for pumping the mixture into the anoxic body of water (10).

The invention provides a biological retention system for efficiently degrading nitrate nitrogen. The biological retention system is composed of a biological system and a deoxidation system, wherein the biological system comprises a submerged layer (1), a first geotechnical cloth layer (2), a sand filter layer (3), a second geotechnical cloth layer (4), a deoxidation layer (5), a third geotechnicalcloth layer (6), a denitrification layer (7), a fourth geotechnical cloth layer (8), a planting soil layer (9) and plants (10); and the deoxidation system comprises a plurality of centrifugal pumps,a check valve (18), a solar cell panel (22), a storage battery (23), an Internet-of-things water dissolved oxygen detector (19), an Internet-of-things flowmeter (15), a deoxidized resin restorer (20),a pesticide storage tank (26) and a waste liquid tank (29). The biological retention system is capable of rapidly and efficiently providing an anaerobic environment and removing nitrate nitrogen in rainwater; and meanwhile, the biological retention system is capable of guaranteeing the recycle of an anoxic layer as well as the cyclic regeneration function and economical efficiency of the system.

The invention relates to the field of organic waste water treatment, and discloses an ethylene glycol industrial waste water treatment device and a method for treating ethylene glycol industrial wastewater. The ethylene glycol industrial waste water treatment device comprises a secondary adjusting control unit and a reaction and discharge unit, wherein the secondary adjusting control unit is usedfor adjusting the pH value of ethylene glycol industrial waste water and adding carbon source, nitrogen nutrient salt and phosphorus nutrient salt to obtain first waste water; the reaction and discharge unit comprises a feed pump, a circulating pump, an anoxic expansion bed reactor, an anoxic water outlet tank, a water outlet tank, a self-cleaning filter and a slag storage tank, and the reactionand discharge unit is used for carrying out denitrification reaction on the first waste water to obtain purified waste water; the anoxic expansion bed reactor comprises a main body, a water flow distributor and a three-phase separator which are arranged inside the main body, and the inside of the main body is divided into a water flow distribution area, an anoxic expansion bed reaction area and aseparated water outlet area from bottom to top in sequence. The device of the invention has low energy consumption, and can continuously treat the ethylene glycol industrial waste water containing high-concentration COD and NO3-N .

The invention discloses a curtain type manual down-flow device combined with fish reefs, and belongs to the technical field of ocean anoxia solving; the curtain type manual down-flow device comprisesfloating balls, ropes, curtain cloth, a steel fixing frame, artificial reefs and anchoring structures, wherein the floating balls are connected with the steel fixing frame through the ropes, the curtain cloth is fitted on the steel fixing frame, reinforcing ribs penetrate the steel fixing frame, and the artificial reefs are connected to the bottom of the steel fixing frame and fixed on the seabedthrough the anchoring structures. When oxygen-enriched water entrained by tidal currents flows through the device, a down-flow is generated under the induction of the inclined curtain cloth and is discharged after being mixed by the artificial reefs at the bottom of the device, and the discharged oxygen-enriched water is mixed with surrounding anoxic water so as to alleviate the anoxia problem ofthe seabed.

The invention provides an integrated anaerobic, anoxic and aerobic conversion combined wastewater treatment device. The integrated anaerobic, anoxic and aerobic conversion combined wastewater treatment device comprises a tank body, wherein the inner part of the tank body is divided into an anaerobic region, an aerobic region and an anoxic region which are mutually separated; the regions are internally provided with an anaerobic water inlet pipe, an aerobic water inlet pipe and an anoxic water inlet pipe respectively; each water inlet pipe is provided with an anaerobic water inlet valve; a filtering layer is arranged at the upper part of each region; overflowing weirs are arranged above the filtering layers; water discharging pipes are arranged at the outer sides of the overflowing weirs; the water discharging pipe of the anaerobic region is communicated with the anaerobic water inlet pipe; an anaerobic and anoxic communicating pipe is connected between the overflowing weir of the anaerobic region and the aerobic region; the water discharging pipe of the aerobic region is communicated with the anaerobic water inlet pipe; an anoxic and aerobic communication pipe is connected betweenthe overflowing weir of the anoxic region and the aerobic region. According to the device provided by the invention, one tank body is internally provided with the anaerobic region, the aerobic regionand the anoxic region; the combination and the combined application of all the regions can realize independent anaerobic, aerobic and anoxic reaction and the combination of various reaction forms, soas to be adaptive to the requirements of different water quality; the water quality of output water is stable.

The invention relates to a novel ozone gas-liquid conversion device. The device comprises a base, wherein a gas-liquid conversion device body, a suction pump and a dissolved gas pump are arranged on the base; a suction pipe is connected with the suction pump; and a water supply pipe is arranged at the bottom of the gas-liquid conversion device body. The device is stable and quick, and the dissolved oxygen of an anoxic water area can be quickly improved.

The invention discloses an advanced treatment process suitable for acidic industrial wastewater, which comprises the following steps: a pretreatment stage: feeding industrial wastewater to be treated into an oil separator, carrying out oil separation treatment, feeding the wastewater subjected to oil separation into a coagulating basin, and starting a flow propeller of the coagulating basin to carry out coagulation reaction for 2-3 hours; an alkalization treatment stage: putting the chemical wastewater after the pretreatment stage into a hydrolysis alkalization pool for hydrolysis alkalization, wherein the hydrolysis alkalization time is 1-2 hours; a biological treatment stage: treating anaerobic organisms and aerobic organisms by enabling the wastewater to sequentially pass through an anaerobic sedimentation tank, an anoxic hydrolysis tank and an aerobic tank; and a final treatment stage: adding polyaluminum chloride and polyacryloyl into the aerobic tank subjected to biological treatment, and carrying out mud-water separation. The acidity of the industrial wastewater can be adjusted through the alkaline compound, the industrial wastewater is pushed to be circularly stirred through the flow propeller, precipitates of a solution after reaction can be reduced through the flow propeller, and absorption of various plants and organisms is facilitated.

The invention discloses an underwater reoxygenation device, and relates to the technical field of underwater oxygenation, the underwater reoxygenation device comprises a water pumping device, a floating container, a water conveying pipe and a weight, the floating container is located on the water surface, the first end of the water pumping device is located below the water surface, and the secondend of the water pumping device is located at the upper end of the floating container; the water pumping device conveys water under the water surface to an upper end inlet of the floating container, the upper end of the water conveying pipe communicates with the lower end of the floating container, and a weight is fixed to the lower end of the water conveying pipe and located underwater. Oxygen-enriched water on the surface layer of a water body can be pumped out and conveyed to an underwater anoxic water layer along a water conveying pipe, and therefore the oxygen content of a target water layer is increased.

The invention discloses a solar multi-dimensional water pushing water body purification and algae removal device which comprises a water surface part, a water middle part located below the water surface part, an interlayer water channel arranged between the water surface part and the water middle part and a bottom water opening connected with the water middle part through a hose. The height of the interlayer water channel is at least 10 cm, and a supporting plate is further arranged in the interlayer water channel. The upper end of the supporting plate abuts against the lower side face of the water surface part, and the lower end abuts against the upper side face of the water middle part. According to the solar multi-dimensional water pushing water body purification and algae removal device, oxygen can be supplied to hypoxic water at the water bottom, algae on the water surface can be removed, water body protection is completed in a more economical mode, and industry progress is greatly promoted.