88results about How to "Efficient and stable removal" patented technology

The invention provides a process for treating domestic sewage with low CN (Carbon-Nitrogen) ratio by use of an anaerobic/aerobic SNDPR (Simultaneous Nitrification and Denitrification Phosphorus Removal) system capable of enriching phosphorus-accumulating bacteria and belongs to the field of biological sewage treatment. After the domestic sewage enters into an SNDPR SBR (Sequencing Batch Reactor), delayed anoxic/anaerobic stirring is carried out firstly, nitrogen removal by denitrification is performed on NO3<-1>-N and NO2<-1>-N left in last cycle by use of denitrifying bacteria and by utilizing organic carbon sources in the sewage, the anaerobic phosphorus release is realized by use of the phosphorus-accumulating bacteria and by utilizing the organic carbon sources in the sewage, and stored substances are synthesized in the cells of the phosphorus-accumulating bacteria. Due to delayed anaerobic treatment, after PAOs phosphorus release is finished, the denitrifying flora in the system is still capable of taking full advantage of organic matters in the sewage and storing the organic matters as an internal carbon source. Hereafter, aerobic aeration stirring is performed; as the concentration of dissolved oxygen is controlled, endogenous SNDPR of the denitrifying flora can be realized while phosphorus absorption of the phosphorus-accumulating bacteria is guaranteed. The method process for treating the domestic sewage with low CN ratio by use of the anaerobic/aerobic SNDPR system capable of enriching phosphorus-accumulating bacteria has the advantages that deep nitrogen and phosphorus removal of the sewage with low CN ratio is realized in one reactor, the process is simple, no external carbon source needs to be added, and the oxygen consumption and the energy consumption are reduced.

The present invention provides a carbon dioxide absorber capable of efficiently and stably removing carbon dioxide in a gas or solution. This carbon dioxide absorber contains an amine compound, a weakly acidic compound and water, the pKb value of the amine compound in an aqueous solution at 30° C. is 4.0 to 7.0, the pKa value of the weakly acidic compound in an aqueous solution at 30° C. is 7.0 to 10.0, and the weakly acidic compound is present in an amount within the range of 0.01 equivalents to 1.50 equivalents with respect to amino groups of the amine compound.

The invention relates to a plasma garbage gasification device and process. The device comprises a gasification reaction chamber, a steam heat exchanger, a steam buffer tank, an air buffer tank, an inner and outer double-cyclone heat exchanging dust collector, a cooling tower, a hydrogen sulfide removal sprayer, a water ring compressor, a gas-water separator, a gas storage tank and a control system of the device, which are connected through a gas pipeline; the gasification reaction chamber comprises an automatic feeding device, an automatic ignition device, a primary gasification zone and a plasma reaction zone; and the plasma reaction zone consists of a secondary refining zone and a gas refining zone. The process comprises the following steps of: gas generation; gasification medium preheating; gas purifying and filtering; and gas compression and storage. The invention has the characteristics of simple structural design, reasonable energy efficiency utilization, low primary input cost and low power consumption, and particularly, harmful substances such as dioxin and the like generated in the gasification process can be effectively removed, the volume reduction ratio is increased, and the waste is turned into the wealth.

The invention relates to a treatment device for a eutrophic water body, in particular to a combined bio-floating bed. The bio-floating bed comprises a bed body which is formed by connecting a plurality of floating bed single bodies and an aeration cavity in the bed body, wherein an aeration device is arranged in the aeration cavity. According to the combined bio-floating bed, a minitype aquatic ecosystem is built through increasing dissolved oxygen in the water body, introducing aquatic plants and increasing population and quantity of microorganism, nitrogen and phosphorus nutrients in the eutrophic water body in an urban landscape can be stably and effectively removed, and a new process is provided for water quality preservation in the northern urban landscape water body which takes tail water of an urban sewage treatment plant as the main nourishment source.

The invention provides a horizontal type three-phase biological fluidized bed and a sewage treatment method thereof. According to the horizontal type three-phase biological fluidized bed, a water inlet and water distribution anaerobic zone, a high-load facultative biological treatment zone, a baffling zone, a low-load aerobic biological treatment zone and a settling pond are horizontally arranged from a water inlet end to a water outlet end, and moreover suspended biological stuffing layers are arranged inside other zones except the baffling zone. Sewage is fed into the water inlet and water distribution anaerobic zone, in an anaerobic environment, BOD organic maters in the wastewater are converted into a fermentation product by facultative fermentation bacteria, polymerized phosphate stored in the cells is decomposed by phosphorus-accumulating bacteria, and then the sewage is fed into the high-load facultative biological treatment zone to remove COD and nitrogen, is further fed into the low-load aerobic biological treatment zone to reduce phosphorus in the effluent, and is finally settled, clarified and filtered by the settling pond so as to obtain clean water. As all process steps are accomplished in one same horizontal pond, the land is saved, the phenomenon that equipment such as a pump and a valve is blocked when dispersed type stuffing is adopted to treat sewage is avoided, and a carrier is prevented from loss, piling or hardening.

The invention relates to a lignin wastewater recycling technology. A micro-electrolysis system, a biodegradation system, a membrane pretreatment system, a membrane treatment system and an evaporation system are adopted in the technology, wherein the micro-electrolysis system at least comprises a micro-electrolysis reaction and coagulating sedimentation, the biodegradation system at least comprises anaerobic and aerobic composite biodegradation, the membrane pretreatment system integrates multiple technologies selected according to effluent quality of the biodegradation system, and the membrane treatment system at least comprises ultrafiltration and reverse osmosis. The biodegradability of high-content lignin wastewater is improved by the micro-electrolysis system, effluent of the micro-electrolysis system enters the biodegradation system for removal of partial COD (chemical oxygen demand), the wastewater enters the membrane treatment system after the hardness, the COD and suspended solids are reduced again by the membrane pretreatment system, produced water of the membrane treatment system is deployed and recycled, and concentrated water enters the evaporation system for evaporative crystallization. The technology treats and recycles the high-content lignin wastewater, the pollution caused by the wastewater to the environment is reduced, and efficient recovery of the water resource is realized.

The present invention provides a composite filler for biological filter bed. The described composite filler is mainly formed from non-metalic wire material, organic matter and porous light inorganic material. The described non-metalic wire material is used as supporting material. Said composite filler composition includes (by wt%) 10-60% of non-metalic wire material, 10-60% of organic matter and 10-60% of porous light inorganic material.

The invention relates to a combined set for treating a micro-polluted source water in counties and towns, and the combined set comprises an inclined tube sedimentation tank, an aeration biozeolite filter column and an activated carbon filter column, wherein the inclined tube sedimentation tank consists of a water inlet region, a sloped tube region and a water collection region, the water inlet region is provided with turbulent stones and a baffle, the water collection region discharges water through a perforated water collection tank, the aeration biozeolite filter column consists of a water/gas inlet region, a filter material region and a water collection region, aeration is carried out in a blast aeration mode, gas is mixed in the water inlet region and enters the filter material region through a long-handle filter head, the filter material consists of coarse-grain zeolite and common-grain zeolite, the effluent water of the aeration biozeolite filter column enters the activated carbon column in a hydraulic drop mode, and the activated carbon filter column consists of a filter material region and a water outlet region. The inclined tube sedimentation tank water inlet region is provided with the turbulent stones and baffle to enhance the flocculation effect of the coagulant and the removal effect of the sedimentation tank. The activated carbon filter column connected to the aeration biozeolite filter column performs a two-stage biochemical synergistic action, and implements advantage complementation, thereby enhancing the water quality of the effluent water and lowering the treatment cost. The combined set can effectively remove ammonia nitrogen, organic substances, manganese and other pollutants in the micro-polluted source water, has the advantages of compact technical linkage, low investment and operating cost and stable quality of effluent water, and is suitable for being used in small-scale water generation occasions, such as water supply to counties and towns.

The present invention relates to an infusion tank for injecting air for ground breaking and a medium for purification treatment, which is buried in contaminated soil in an oil such as gasoline or diesel; an air injector connected to the injection port for supplying high pressure air for underground crushing, a pressure vessel, and a compressed air control valve; an oxidant injector and a pump foroxidizing the contaminated soil; a microorganism injector and a pump connected to the injection well for biologically treating the contaminated soil; a nutrient injector and a pump for feeding microorganisms; an extracting unit for extracting volatiles from the soil outwards during the contaminated soil treatment; a vacuum pump for generating a vacuum in the extraction well to induce underground crushing; a gas-liquid separation tank and a pump for separating gas and liquid in the extracted volatiles; an activated carbon adsorption vessel for treating the volatilized gas; and an automatic control device and a field instrument. According to the invention, pollutants can be highly efficiently and stably removed, processing time is shortened and processing cost is reduced.

The invention belongs to the fields of treating odorous pollutants through chemical oxidation technology, and relates to a method for treating odorous gas by utilizing solution of hexavalent ferric salt. Odor is harmful to human respiratory, circulatory, digestive, endocrine and nervous systems, and odor pollution has become one of numerous environmental pollution problems to be solved; and in the method, the solution of hexavalent ferric salt and odorous substances are subjected to a chemical oxidation reaction, so that active groups in the odorous substances are changed. Due to oxidation of the hexavalent ferric salt on hydrogen sulfide, ammonia, methyl mercaptan and other odorous substances in the odorous gas, the active groups in the odorous waste gas are oxidized into non-toxic and harmless sulfate and other products. Therefore, the aim of purifying the odorous waste gas is fulfilled, and the odor of the odorous waste gas can be effectively removed.

The invention relates to a horizontal plasma garbage gasification reaction chamber and a gasification technology thereof. The reaction chamber comprises an automatic loading apparatus, a primary gasification zone, a plasma reaction zone, an automatic ignition device, a furnace temperature monitoring system, a furnace level monitoring system, an inlet and outlet gas temperature monitoring system, an inlet and outlet gas pressure monitoring system and a flame monitoring system. The primary gasification zone is provided with a rasping moving grate, a chain type adjusting and self-levelling apparatus; and the plasma reaction zone is a fission structure comprising a second thining zone and a gas fining cell. The gasification technology comprises the following steps of: automatic loading; primary gasification; plasma second thining; and plasma gas refining. According to the invention, gas is generated from calorific value of the garbage; the generated gas and slag are further processed by aplasma torch to remove harmful substances therein and increase gas output, reduce waste residue discharge, lower one-time investment cost and operating cost of garbage gasification and purify the gas.

A catalyst for treating exhaust gases having excellent durability and performance for removing nitrogen oxides and organic halogen compounds and a low SO₂ oxidation rate, a titanium oxide suitable for preparing the catalyst and a method for treating exhaust gases containing nitrogen oxides and/or organic halogen compounds using the catalyst are provided.

The BET specific surface areas of the titanium oxide and the catalyst for treating exhaust gases are in the range of 85 to 250 m²/g and in the range of 50 to 200 m²/g respectively. The titanium oxide and the catalyst for treating exhaust gases have each a ratio in the range of 15 to 145%, the ratio of the intensity of the peak indicating an anatase crystal present in the range of 2θ=24.7° to 2θ=25.7° of powder X-ray diffraction thereof (Ia) to the intensity of the peak indicating an anatase crystal present in the range of 2θ=24.7° to 2θ=25.7° of powder X-ray diffraction of the standard sample comprising a mixture composed of 15% by mass of pure anatase-type titanium dioxide and 85% by mass of pure rutile-type titanium dioxide (Ib).

Disclosed is a reverse osmosis concentrated water enhanced treatment method and device. The reverse osmosis concentrated water enhanced treatment method comprises adding hypochlorite or hypochlorous acid or chloramine into reverse osmosis concentrated water entering into an ultraviolet reactor for reaction under ultraviolet and mixing effects, wherein ultraviolet rays synergizes with the hypochlorite or hypochlorous acid or chloramine to produce hydroxyl radicals and chlorine radicals; preferably, also, adding sulfate oxidizing agent and oxidation promoter of copper ions into the reverse osmosis concentrated water for synergism to produce hydroxyl radicals and sulfate radicals to effectively remove organic matters; discharging water into a bioreactor, according the concentration of nitratein the discharged water and redox potential, adding in carbon sources to remove organic matters and nitrate nitrogen, then performing aerobiotic aeration reaction to remove residual organic matters,and add in porous iron-based filler into the bioreactor to promote electron transfer and further to promote nitrification and denitrification; passing the discharged water through microalgae/wetland to further remove pollutants such as phosphate.

An apparatus for removing a dud is disclosed, which makes it possible to safely remove a dud from various kinds of guns used as long-range firepower when a shell is caught in the inner diameter of a gun barrel and thus is not discharged. The apparatus includes a forward driving means providing a propulsive force for forwarding the apparatus along an inner surface of a gun barrel, a press driving part directly connected to the forward driving means and having a built-in motor to provide a rotating force, a sticking means connected to the press driving part and extended to an outside to be tightly stuck on the inner surface of the gun barrel by a main shaft being rotated by the motor, and a pushing part having one end part connected to the sticking means and the other end part coupled to a cap that is in contact with the dud, and pushing the cap through a forward movement of the main shaft after the sticking on the inner surface of the gun barrel is performed by the sticking means.

A photocatalysis apparatus has at least one unit structure (2). The unit structure has a photocatalyst module (6) and a pair of discharge electrodes (5) sandwiching the photocatalyst module. The photocatalyst module includes a photocatalyst and a three-dimensional ceramic mesh base carrying the photocatalyst. At least one of the discharge electrodes is a three-dimensional discharge electrode having an electrode body (3) and a conductive frame (4). The electrode body consists of cells made of a conductive foil and has front, back, and side faces. The front and back faces are separated from each other by a predetermined distance and have a shape selected from a group including a honeycomb, a lattice, and a mesh. The side faces of the electrode body is covered with the conductive frame.

One or more embodiments of the invention relate to the technical field of environmental management, in particular to a method for removing vanadium citrate in a water environment, a kit and application. The method comprises the following steps: putting a vanadium citrate solution into a reaction container; adding the iron-based ore material and the peroxymonosulfate solution into a reaction container to obtain a reaction system; wherein in the reaction period of the reaction system, the reaction system is stirred for reaction; adjusting the pH value of the reaction system after the reaction to 7.5 or above so as to separate out a precipitate from the reaction system; removing the precipitate to remove vanadium from the aqueous environment. The method can be used for stably and efficiently removing the vanadium citrate in the water environment.

The invention discloses a quick starting method for an aerobic granular sludge reactor for treating difficultly degraded waste water. Sucrose is used as a carbon source in the inlet water of the starting initial stage, the organic load is controlled at 1 to 1.6kg m<-3>d<-1>, the surface air velocity is 1.2 to 1.5cm s<-1>, the settling time of sludge is controlled at 5 to 15 minutes, and the biomass in the reactor reaches 6 to 8g L<-1> after operating for 7 to 10 days; the organic load of the inlet water is further improved to 3.0 to 3.5kg m<-3>d<-1>, the surface air velocity is increased to 2.4 to 2.8cm s<-1>, the settling time of the sludge is shortened to 3 to 5 minutes, and the operation is continuously carried out for 3 to 5 days; and 25 percent of carbon source is replaced by using a toxic organic substance, the organic load is maintained at 3.0 to 3.5kg m<-3>d<-1>, the ratio of the toxic organic substance to the carbon source of the inlet water is improved according to the gradient of 25 percent every 7 days after the removal rate of pollutants reaches over 95 percent, and the operation is continuously carried out for 20 to 25 days, so that quick start of the aerobic granular sludge reactor for treating the toxic difficultly degraded organic waste water is realized. After the operation is continuously carried out for one month, the reactor is stable. The method quickly realizes start of the aerobic granular sludge reactor for treating the difficultly degraded waste water, and simultaneously realizes efficient and stable removal of the difficultly degraded pollutants.

The invention relates to the technical field of water treatment, and in particular relates to a black titanium dioxide/silver phosphate composite photocatalyst as well as a preparation method and application thereof. The black titanium dioxide/silver phosphate composite photocatalyst provided by the invention comprises black titanium dioxide and silver phosphate dispersed on the surface of the black titanium dioxide. According to the method, the black titanium dioxide is compounded with the silver phosphate, so that the problem of low photocatalytic efficiency of the black titanium dioxide isovercome, and the stability in the application process of the silver phosphate is greatly improved by accelerating electron transfer; and the composite photocatalyst can efficiently and stably removesingle and combined contamination of typical harmful algae and/or antibiotics in water.