79 results about "Induced gas flotation" patented technology

The invention relates to the environmental protection field, the microalgae cultivation engineering field and the biodiesel refining field, specifically an integrated production method of organic sewage/waste residue treatment, microalgae culturing and oil refining. The method comprises: treating the organic sewage and organic waste residue respectively by anaerobic biochemical technology to generate biogas for generating electricity and supplying heat; performing aerobic biochemical treatment to the sewage and biogas slurry; blending into nutrient solution, and adding into large-scale photobioreactor; passing into biogas, burning to generate carbon dioxide waste gas for culturing oil-containing microalgae; collecting the obtained microalgae by air floatation method and breaking the walls; separating the oil-containing microalgae into microalgae oil, microalgae protein, microalgae polysaccharide and microalgae residue; and refining biodiesel accorded with the national standard using the microalgae oil as raw oil. The invention integrates the organic sewage and waste residue treatment, microalgae culturing and processing, and biodiesel refining; reduces production cost; realizes biodiesel clean production; and treats the 'three wastes'.

Methods of deoiling oily water such as SAGD and frac produce water. The oily water is treated with a natural coagulant selected from tannins and chitosan. A cationic and/or anionic flocculant may also be added to the treated oily water. The thus treated oily water may be subjected to conventional mechanical oil separation techniques such as hydrocyclonic separation, dissolved air flotation, entrapped air flotation, induced gas flotation, gravity filters, reverse osmosis filters, API, or Voraxial® bulk separators and the like.

A method for processing interface emulsion, water, and solids contained within a separator vessel that comprises the steps of continually extracting those components from the vessel and then passing them through a gas flotation cell. The cell, which is preferably a vertical induced gas flotation cell, separates the oil and water contained in the interface emulsion and discharges recovered oil from an upper portion of the cell and treated water from a bottom portion of the cell. The recovered oil and treated water may be further processed and recycled to the vessel or sent elsewhere. The treated water may also be recycled to the cell or sent to a process sewer. Fuel gas residing in an upper portion of the cell may be cooled and passed through a splitter. All the steps of the method comprise a closed system with no air emissions.

The invention relates to a treatment method of lignin production waste water, which comprises the following steps of: treating and recovering lignin residues in lignin waste water through a gas floatation method at first; respectively feeding gas floatation water and condensate water in a multi-effect evaporation stage into an electro-osmosis desalting device to obtain lignin waste water containing no salt basically and highly saline concentrated water; and recovering the lignin waste water containing no salt basically as supplementary water in the lignin production process, feeding the highly saline concentrated water into a multi-effect evaporation device to concentrate and crystallize, recovering the obtained evaporation condensate water in the electro-osmosis desalting device, and directly selling the obtained high-purity solid salt. Due to the process, resource recycling of waste water is realized; closed cycle of water is realized, so that the pollution abatement cost is reduced; organic combination of the electro-osmosis technology, multi-effect evaporation and the crystallization technology is sufficiently embodied; and the treatment method disclosed by the invention is a high-efficiency and economical treatment method.

The invention discloses a method for treating coal gas wastewater by adopting a nitrogen floating device, relating to a method for treating coal gas wastewater. The invention aims to solve the problem that air is used a gas source when coal gas wastewater is treated with a floating method currently, which causes the deep color of the wastewater to easily generate oxides which affect the following biochemical treatment. In the first technical scheme, nitrogen is dissolved into wastewater and enters a floating tank; supersaturated nitrogen is released in a form of tiny bubbles and mixed with a second part of water, and dispersed oil pollutant in the wastewater is adhered to the surfaces of the tiny bubbles to form composite particles; and the composite particles are scraped by a slag scraping machine. The second technical scheme is characterized in that compressed nitrogen escapes from the surface of a diffusion plate or a diffusion tube arranged at the bottom of the floating tank in a form of tiny bubbles. The third technical scheme is characterized in that the upper space of the floating tank is kept at normal pressure, the nitrogen dissolved in the wastewater reaches a saturated or supersaturated state, and the upper space of the floating tank is in a vacuum state through a vacuum pump. The method is used for treating coal gas wastewater.

The invention relates to a paper pulp wastewater treatment processing method, which comprises a bottom plate, a filtering device and a collecting device, wherein the filtering device is installed in the middle of the upper end of the bottom plate, the collecting device is installed on the outer side of the filtering device, and the collecting device is of an annular structure. In the prior art, when the existing equipment treats paper pulp wastewater, the residual paper pulp fibers in the wastewater cannot be effectively collected, so that the paper pulp recovery effect is poor, the waste is serious, and different degrees of pollutions can be caused to the water body; and when an air flotation method is adopted to treat paper pulp wastewater, the contact effect of the wastewater and injected air is poor, the impurities in the wastewater cannot be completely collected, more impurities are left in the treated wastewater, and the stability of the floating foam formed by contacting the airis poor, so that secondary pollution to the wastewater and other problems are easily caused. With the method of the invention, the problems in the prior art can be solved.

The invention relates to a sewage treatment method, in particular to a method for sewage treatment through a co-agglomeration gas flotation method, which integrates a clarification function with a gas flotation function together. The method comprises the following steps: (1) feeding raw water to a primary flocculation zone to be flocculated; (2) feeding the water to a secondary flocculation zone for contact agglomeration, and further conducting agglomeration gas flotation; (3) feeding the water to a gas flotation contact zone, conducting contact agglomeration on the gas trapped flocculation particles with gas dissolved water released by a releaser, enabling the the gas trapped flocculation particles to be in full contact with microbubbles to form co-agglomerated large bubble flocculation; (4) feeding the water to a solid-liquid separation zone. The method disclosed by the invention has the benefits that the conventional mechanical agitation clarification tank is organically combined with the gas floatation technology, the method organically combines the working procedures comprising mixing, primary flocculation, secondary flocculation, gas floatation, settling, and sludge reflux contact flocculation together; the gas dissolved water microbubbles directly participate in agglomeration and are co-agglomerated with flocculation to become large; the bubbles are placed inside the flocculated particles, so that the effect of agglomeration of the bubbles is fully played and the bubbles are firmly adhered to the flocculated particles to achieve co-agglomeration gas flotation.

The invention discloses an air-float predisposing method of organic effluent, which comprises the following steps: blending organic effluent and sludge with high-activity anaerobe; decomposing organics in the effluent under 15-60 deg.c through microbe; generating bubble; making non-decomposed particle impurity attached by bubble float on the water level; forming scum; remaining effluent for 1-2h to drain. the device contains a reacting pond bulk with reacting area and separating area separated by baffle on the pond bottom, wherein the pond wall top on the reacting area side possesses draining pipe with inlet pipe and blow-down pipe on the bottom; the diversion cylinder is set in the reacting area with stirrer on the diversion cylinder; the outlet pipe is set on the top of pond wall on the separating area side; the notch is opened on the top of baffle with reflux hole near the bottom.

The invention relates to a water treatment method for rearing shrimp seedling which comprises, conducting sand filtering to the cultivated shrimp seeds with sea water, removing the microtubule organic matter and foreign substance in the seawater through air-floating method, then performing short time sterilization and hazardous substance decomposition by means of circulating reflux mixing, stewing and filtering with activated charcoal, and stewing the filtered sea water.

The invention provides an industrial waste water treatment method and belongs to the technical field of industrial waste water treatment in the environmentally-friendly technology. The invention provides a treatment method for impurity content reduction and decoloration of industrial waste water. The method comprises the following steps of: removing macromolecular pollutant and solid matter from the industrial waste water by filtering or an air flotation method, and then discoloring the industrial waste water by an integrated process of physical-chemical precipitation (or air flotation), anaerobic treatment (and facultative treatment), aerobic treatment and physical-chemical precipitation.

The invention belongs to the technical field of a solid waste treatment method and particularly relates to a method for performing microplastic separation on the basis of a gas floatation method. Themethod comprises the following steps: adding ammonium triheptyl dodecyl iodide into water in which microplastic is dispersed, mixing completely, adding inorganic acid into the dispersing liquid, mixing completely, continuously introducing air or oxygen, enabling the introduced air or oxygen form bubbles in the dispersing liquid to ascend, driving the microplastic in the water to float while the bubbles ascend, and separating out a large amount of microplastic-containing liquid on the upper layer of the water to realize separation of the water and the microplastic.

The invention discloses a spore-imitating water body suspended matter capturing sinking ball, and belongs to the technical field of water treatment. The characteristics of spore-producing plants can be imitated; a plurality of drug release mother balls are uniformly put into a polluted water area; magnetic spore-like adsorption balls are matched with the drug release mother balls; based on the characteristics that a disintegration column vibrates at high frequency after absorbing water and releases a large amount of gas, on one hand, an elastic self-sealing bag on the drug release mother ballis matched; a flocculating agent in the elastic self-sealing bag is continuously transported and dispersed into the water body along the spore-like adsorption balls, suspended matters around the flocculating agent is flocculated and then captured and collected; on the other hand, released gas is used for forming stable bubbles in the water body; suspended matters are gathered and floated to the water surface by a simulation air flotation method; meanwhile, after the disintegration columns in the spore-like adsorption balls are consumed, the overall mass is reduced, the disintegration columns float upwards, suspended matters floating upwards along with bubbles can be collected again, the balls can be recovered and reused, and the suspended matter collection efficiency and effect are greatlyimproved.

The invention discloses a synchronous decoloring and nitrogen recovery method for printing wastewater.The synchronous decoloring and nitrogen recovery method is characterized by including the steps of adding cation exchange resin into the printing wastewater and stirring for 10-180 minutes; separating cation exchange resin precipitate from the wastewater; separating suspended matters in the wastewater from the wastewater by a conventional precipitation method or an air-flotation method; subjecting the precipitated cation exchange resin to dehydration and acid solution treatment sequentially, and recovering nitrogen to enable the resin to regenerate; adding the regenerated cation exchange resin into the printing wastewater and using circularly.The synchronous decoloring and nitrogen recovery method for the printing wastewater has the advantages that according to a treatment method, printing wastewater decolorizing ratio is above 99.5%, ammonium-nitrogen removal rate is above 85%, CODCr removal rate is above 90%, synchronous printing wastewater decoloring and nitrogen recovery are achieved, and the content of acid ions in the wastewater is not increased.

The invention publicizes the integration dynamical equilibrium processing method and its equipment for the sewage which contained oil , this method connects the water-treating equipment of jet-style with flotation process, the modified textile fiber ball water-treating equipment as well as the ultra filter diaphragm water-treating equipment with the sewage pipeline contained oil through the pipeline which establishes and contacts in turn in the same place, between the above equipments was equipped with process-adjust valve. The said jet-style flotation water-treating equipment takes the first level oil-contained sewage treatment, the modified textile fiber ball water-treating equipment takes the second level sewage treatment, the ultra filter diaphragm water-treating equipment takes the third level sewage treatment. At the sewage import end establishes one flowmeter, on the pipeline supposes three on-line oil-containing concentration detector and dynamic control system which carries on-line control and adjustment to each treating process according to the set treatment standard, then choice the next level processing equipment, which makes the sewage treatment in optimization process.

The invention relates to an in situ air-flotation treatment system of a riverway water body. The system comprises a feeding system, a push flow oxygen-increasing device, a micro-bubble generating device and a scum guiding device, wherein the feeding system comprises a feeding pipe and a material storage device used for storing a flocculating agent, and the feeding pipe is used for adding the flocculating agent to a pollution treatment zone; the push flow oxygen-increasing device is arranged in the pollution treatment zone and used for increasing the oxygen of the water body, making flows and flocculation stirring; the micro-bubble generating device is used for making the water body in the pollution treatment zone generate micro-nano bubbles; the scum guiding device is used for intercepting scum in the pollution treatment zone. Compared with a conventional land heterotopic air-flotation method, the in situ air-flotation treatment system of the riverway water body conducts in situ flocculating and air flotation treatment on pollution in the riverway water body, can obviously save floor space on the whole, can obviously save running energy consumption, and can simultaneously obviously improve the removal effect of the pollutants in the riverway water body through combination of multi-effect purification means namely flocculating, powerful aeration and micro-bubble air-flotation.

The invention discloses a treatment method of electroplating wastewater. The method successively comprises the following steps: removing suspension liquid and floating oil in raw water by virtue of anair floating method, and regulating the PH to 3 to 4; adding a fenton reagent, performing primary fenton reaction, and regulating the PH to 8 to 9; precipitating, and regulating the PH of supernatantto 4 to 6; performing secondary fenton reaction, and regulating the PH to 9 to 10; precipitating, and regulating the PH of the supernatant to 2 to 4; performing reduction reaction, and removing hexavalent chromium ions; regulating the PH to 8 to 9, precipitating, and introducing the supernatant to a biochemical tank to be treated; and discharging the water treated in the biochemical tank up to standard. The electroplating wastewater treatment process provided by the invention is simple in process, rapid for workers to operate and low in treatment apparatus cost.

The invention relates to a process for clarifying fish-farming sewage with an electro-coagulation air flotation method. The process comprises the following steps: (1) fish-farming sewage is introduced into an electro-coagulation air flotation reaction tank; current density is 0.15-0.20A/dm<2>, and electrolysis time is 20-30min; dirt produced by air flotation separation is regularly discharged from a water discharge port in the upper part of the tank body; (2) a flocculation solution produced under the effect of an electrochemical reaction is delivered through a precipitation reaction tank and is subjected to solid-liquid separation, wherein a precipitation time is 15-25min; precipitate is accumulated at the bottom and is discharged together; and a supernatant which is the clarified solution is returned to a fish-farming tank. The structure of the electro-coagulation air flotation reaction tank is as the follows: an insulation positioning strip is arranged on the bottom of the tank body; the positioning strip is provided with recesses; a plurality of pole plates are suspended on the wall of the tank; the lower parts of the pole plates are divided by using the positioning strip recesses; and the pole plates are connected with a mono-polar parallel connection method. The precipitation reaction tank has the following structure: a support is fixed on the wall or bottom of the tank; and a plurality of inclined tube fillers are uniformly arranged on the support, wherein the space between the tank bottom and the inclined tube fillers is 300-350mm, and a tilt angle of the inclined tube fillers relative to the water level is 50-60 DEG. The filling rate of the inclined tube fillers filling the space above the support of the precipitation reaction tank is 65-80%.

The invention discloses an oil-removing and slag-skimming device for a sewage treatment plant. The oil-removing and slag-skimming device structurally comprises an external power line, a water outlet,a multiple oil-removing and slag-skimming device, a maintenance door, a transparent observation window, a control panel, a protective shell and a water inlet, wherein the lower end of the water inletis vertically embedded into the upper end of the protective shell; the lower end of the control panel is welded with the front end of the protective shell by a pin rod; the left end of the external power line is embedded into the right end of the protective shell; the left end of the water outlet is embedded into the right end of the protective shell; the back part of the transparent observation window is embedded into the front end of the maintenance door. The oil-removing and slag-skimming device for the sewage treatment plant disclosed by the invention has the beneficial effects that the combination of an air flotation method and a flocculation method is adopted, oil-water separation can be quickly carried out by the air flotation method, the separated oil drops are adsorbed into floccules by the flocculation method and then are filtered, and raw water reaches the standard level for purification use in single purification, so that the purification cost is reduced.

The invention provides a method for fixing CO2 and treating oil field sewage by using microalgae. The method comprises the following steps: a, firstly, performing oil removing pretreatment on oil field sewage in an oil field sewage union station by using an exhaust gas flotation method, feeding the oil field sewage of which most crude oil is removed through air flotation into an activated sludge method or biological membrane method oil removing treatment system for further removing crude oil, and adding N and P nutritive salts according to a weight part ratio of TOC:N:P being 100:(5-10):1 in the activated sludge method or biological membrane method oil removing process; b, introducing flue gas of which the content of CO2 is 3-15% into the oil field sewage after aerobic biological method treatment in the step a; then, feeding into a race track type microalgae culture system, adding microalgae seeds into the race track type microalgae culture system, growing for 5-15 days until the density of microalgae is greater than 10<7>/ml and the grease content is greater than 20%; c, feeding the alga-containing oil field sewage treated by the race track type microalgae culture system into a flocculation settling pond, collecting microalgae by using a flocculation method, filter-pressing the algal sapropel by using a filter-press to make alga cakes, extracting biodiesel oil from the alga cakes; filtering, sterilizing and deoxidizing settling effluent, and refilling the settling effluent back to a stratum to remove oil.

The invention belongs to the technical field of oil stain separation, particularly relates to an oil refining wastewater oil stain separation device utilizing an air flotation method, and provides thefollowing scheme aiming at the problems that an existing oil refining wastewater oil stain separation device can basically separate oil stains in wastewater, but solid impurities such as sand grainsin the wastewater are difficult to collect and separate. The device comprises a workbench, a separation cylinder is fixed to the outer wall of the top of the workbench through bolts, an air bag is fixed to the inner wall of the bottom of the separation cylinder through bolts, air outlet holes distributed at equal intervals are formed in the outer wall of the top of the air bag, and air outlet pipes are inserted into the inner walls of the air outlet holes. The slag scraping hopper can drive the rotating roller and the stirring blades to rotate while rotating, the stirring blades can further stir sand grains in waste water while rotating, accordingly, the sand grain collecting speed of the filtering net bag can be increased, and people can take down the filtering net bag through the fixingbuckles to treat solid impurities in the net bag after separation is completed.