7022 results about "Ammonia nitrogen" patented technology

The invention relates to a catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater; the organic wastewater is collected to an adjusting tank and enters an air floatation tank for air floatation treatment to remove part of the organic matters after the adjustment of water volume and water quality; the scruff is collected or recovered; the wastewatergoes through Ph adjustment and then enters a catalytic iron-carbon and micro-electrolysis unit to improve the biochemical quality; the effluent goes through Ph adjustment and then enters a sedimentation tank; the effluent of the sedimentation tank adopts anoxic-aerobic biochemistry treatment to remove the organic matters and ammonia nitrogen and then is emitted after reaching the standard; and the filler of the catalytic iron-carbon and micro-electrolysis unit comprises iron, carbon and a catalyst, wherein the mass ratio of the iron, carbon and catalyst is 1: (0.3-1.5): (0.01-0.5). The invention can effectively improve the micro-electrolysis electrochemical reaction efficiency and the degrading capability to the organic matters, and reduce the wastewater treatment cost with convenient technological operation.

The present invention belongs to an industrialization aquiculture field, particularly relates to a closed cycle water industrialized fish cultivating system. The system separates solid and liquid in a storage sedimentation basin and a backwater channel sedimentation and rotational flow pool sedimentation, the tiny particulate matter is separated and purified by a sandrock filtering bed of a one level biological filter based on the water particulate matter separation, the water purified by the one level biological filter is feed into a two stage biological filter, the biological film of biologic filling material in the one level and the two stage biological filters is degraded with ammonia nitrogen and azote nitrous acid, the total purifying rate of the water particulate matter reaches more than 99%, the culturing water is added with oxygen mechanically or by liquid oxygen, finally the water is disinfected and sterilized through a ultraviolet ray sterilizer, and the clean ecological water is feed into a fish pool, thus the waste water of the fish pool may be purified and used in repeat. The fish-cultivating system implements completely closed cycle water industrialized fish cultivation, the fish is out of a disease or less, and the fish survival is more than 80%.

The invention discloses a microbial agent for treating ammonia-containing waste water and a preparation method thereof. The microbial agent for treating ammonia-containing waste water mainly comprises three bacterial strains of nitrobacter sp, nitrosobacteria nitrosomonas sp., denitrobacter sp., and the contents of the three bacterial strains can be regulated or proportioned according to specificcultivation conditions and product requirements through methods of oriented domestication, and the like. The cultivation method comprises the following steps of: enriching a bacterial source, purifying and amplifying stage by stage for cultivating. The microbial agent can be used for oriented domestication according to a waste water treatment result so as to improve the content of a target bacterial strain. The cultivation method has the advantages of high cultivation efficiency, large production capacity, and the like and is suitable for commercially producing complex microorganisms for treating the ammonia-containing waste water in a large scale. The obtained microbial agent can effectively treat low-COD (Chemical Oxygen Demand) and high-ammonia-nitrogen waste water, such as waste water of catalyst production, and the like.

The invention relates to a multi-effect pollution removal purifying agent and a method for applying the same. The purifying agent is complexly formed by a strong oxidant, an effective adsorbent and an assistant medicament by a weight percentage of strong oxidant 10-80%, effective adsorbent 10-70% and assistant medicament 5-50%. The surface water treatment process of using multi-effect pollution removal purifying agent of the invention comparing with the common flocculants has the following advantages: effectively improving the turbidity removal ratio, increasing the flcos formation amount and alum blossom density for the difficult coagulated surface water, improving the deposition efficiency, oxidizing and removing the organic matters in the water, eliminating the chroma and odor caused by the pollution, increasing the effluent conventional indexes, obviously improving the indexes such as oxygen consumption and ammonia nitrogen, wherein the removal rate of oxygen consumption and ammonia nitrogen can reach 25-60%, the removal rate of small organic molecules, benzenes and phenols can reach more than 80%, playing an obvious roll for the algae inactivation of lake water and reservoir water which are serious eutrophic, improving the algae removal efficiency of the deposition and filtration technologies with an algae removal rate of 80-90%, improving the coagulation efficiency, reducing 20-30% of the common flocculant dosage, effectively adsorbing the codeposition heavy-metal ion. The adding equipment of the invention is easy and convenient to use with little investment and fast effect.

The invention relates to an agrobacterium strain (Agrobacterium sp.) with heterotrophic nitrification-aerobic denitrification capability and an application thereof in nitrogenous effluent treatment. The bacterial strain is characterized in that: 16S rRNA gene contains nucleotide sequence shown in sequence table with a sequence length of 1418bp and a accession number FJ639330 in Genbank. The preservation number thereof is CGMCC No.2962. The agrobacterium of the invention has not only heterotrophic nitrification capability but also aerobic denitrification capability. During nitrogenous effluent treatment, and one aerobic phase can cause ammonian to change into gaseous product with high denitrification efficiency and easy operation and tremendous economic benefit compared with the traditional biological denitrification process.

One kind of short range nitrifying-anaerobic aminoxidizing sequencing batch type denitrifying biomembrane mode and plant is disclosed. The limited aerating mode with real-time control of the sewage temperature inside the reactor and high frequency alternation between aeration and anaeration can inhibit the growth of nitrite oxidizing bacteria and denitrifying bacteria so that the aminoxidizing bacteria and the anaerobic aminoxidizing bacteria become the dominant bacteria in the nitrifying and denitrifying stages. In the nitrifying stage, nitrification is stopped in the nitrite step; and in the denitrifying stage, ammonia nitrogen acts as the direct electron donor to reduce nitrite. The plant is provided with fixed spherical composite stuffing with spherical shell of polypropylene and filled inside biological composite material. Sectional discrete water feeding mode is adopted to feed the sewage to be treated in four stages into the reactor.

The invention relates to aerobic denitrifying paracoccus denitrificans and application thereof. A bacterial strain provided in the invention is paracoccus denitrificans DN-3CGMCC No. 3658; the Paracoccus denitrificans can carry out aerobic denitrification by using nitrate nitrogen under both aerobic and oxygen-limited conditions and can also carry out heterotrophic nitrification-aerobic denitrification by using ammonia-N, and a total nitrogen removal rate on above mentioned occasions is greater than 90%. The paracoccus denitrificans provided in the invention has stable hereditary features, isapplicable to treatment of a variety of nitrogen-containing waste water and produces a good nitrogen removal effect.

The invention relates to a rapid efficient ammonia nitrogen remover and a preparation method and application thereof. The rapid efficient ammonia nitrogen remover is prepared from the following components in percentage by mass: 5-35% of an oxidant, 5-50% of an inorganic coagulant, 2-40% of an adsorption material, 1-15% of a calcium salt and 1-20% of an effervescent disintegrant. The rapid efficient ammonia nitrogen remover can be dissolved in water, and is free of a residue, free of secondary pollution, the operation is simple and convenient, the time required for purifying the water is short, ammonia nitrogen can be quickly and efficiently removed, and the rapid efficient ammonia nitrogen remover has a certain removal effect on COD, total phosphorus and suspended matters at the same time. The rapid efficient ammonia nitrogen remover integrates oxidation, breakpoint chlorination, coagulating sedimentation, adsorption, pH value control and rapid collapse body dissolution, and the ammonia nitrogen can be quickly and efficiently removed.

The invention provides a process method for separating and purifying rare earth elements by solvent extraction. The method takes a mixed rare earth sulfate solution obtained from a rare earth ore treated by sulphuric acid as a raw material, directly adopts a nonsaponifiable P507 extraction agent or a synergistic extraction agent containing the P507 to completely extract rare earth in a material liquid into an organic phase, and then takes the organic phase as a rare earth material liquid to extract, separate and purify the rare earth or directly backextract to produce mixed chlorinated rare earth or rare earth nitrate. The process method is simple and flexible, does not saponify the organic phase during the extraction and separation process, does not produce ammonia nitrogen waste water, is easy to backextract middle and heavy rare earths, and has less consumption of acid and base and low production cost.

The invention relates to a waste water treatment system and a waste water treatment method for a power plant. The system comprises a pre-treatment system, an evaporation and crystallization system, an ammonia nitrogen treatment system and a membrane condensation and treatment system, wherein the pre-treatment system is connected to waste water of the power plant; the ammonia nitrogen treatment system is connected between the pre-treatment system and the evaporation and crystallization system and connected to waste water treated by the pre-treatment system; and the membrane condensation and treatment system is arranged between the ammonia nitrogen treatment system and the evaporation and crystallization system. A small amount of ammonia nitrogen in system water is removed or the ammonia nitrogen content of the system water is lowered by using the ammonia nitrogen treatment system; the NH3 content of blow-off tail gas produced after blow-off is very low and fully meets the requirement of national atmospheric pollutant emission standard; and the ammonia nitrogen content of water is lowered by a blow-off method (or an oxidation method) so that running cost is lowered. Moreover, the concentration of waste water can be increased by membrane condensation and treatment technology and crystallization can be performed, so that the steam consumption of the evaporation and crystallization system and the running cost are reduced; and the NaCl content of crystal salt is increased so that the crystal salt reaches the quality standard of industrial salt and the aim of recycling waste materials is fulfilled.

The invention relates to a device for ammonia nitrogen wastewater discharge reduction and ammonia nitrogen resource utilization and a method thereof, and belongs to the field of wastewater discharge reduction. The conventional steam blow-off method has high unit energy consumption (250-300 Kg steam/ton wastewater) in ammonia nitrogen wastewater treatment, thus resulting in very high ammonia nitrogen wastewater treatment cost. The inventive device comprises at least two stages of ammonia nitrogen stripping step and ammonia nitrogen reutilization step. The ammonia nitrogen wastewater to be treated is respectively fed into each stage of ammonia nitrogen stripping step, and the removal of ammonia nitrogen in wastewater is realized in ammonia nitrogen stripping tower and the resource utilization is realized in the ammonia nitrogen reutilization step. Except for the first stage of the ammonia nitrogen stripping tower requiring steam introduction, the steam required on other stages of ammonia nitrogen stripping tower is obtained by vaporization of a part of the tower bottom liquid in each tower by using the heat released via condensation of a part of steam in the upper stage tower and flash evaporation of the tower bottom liquid in the upper stage tower, so as to remarkably reduce steam consumption. The inventive device and method have the advantages of high ammonia nitrogen content wastewater treatment, low ammonia nitrogen content in wastewater after treatment, low steam consumption, and low treatment cost.

The invention comprises a composite microbial agent applicable to efficiency enhancement of common chemical industry sewage treatment systems. The composite microbial agent applicable to efficiency enhancement of the common chemical industry sewage treatment systems meets the demands on treatment on comment pollutants in existing chemical industry and environmental production as well as on establishment of functional bacteria required by a stable bacteria flora. According to one of the schemes, the composite microbial agent is composed of 108 microorganisms of three major functional types. When the composite microbial agent is added together with microbial growth promoting carriers, nutrient agents and the like into a biochemical system, the composite microbial agent can promote establishment of a complete food chain in the biochemical system through various microorganisms with special pollutant degrading capabilities and comprehensive metabolic manners to enhance utilization and metabolic decomposition of pollutants in sewage through the microorganisms, thereby achieving efficient reduction of COD (chemical oxygen demand), ammonia nitrogen, phosphorous, sulfur and like.

The invention discloses a removing method of ammonia nitrogen from water through ozone catalytic oxidation, which comprises the following steps: one, arranging activator in reactor; two, proceeding ozone disperse-gas in the reactor; three, controlling contacted time of ozone and waste water and activator and waste water with full of ozone; leading the disposing water out of reactor; getting yielding water. This invention can either dispose high concentrate ammonia nitrogen waste water, or low concentrate ammonia nitrogen waste water, and non-cause twice pollution.

The invention discloses a denitrifying strain with nitrifying function, a strain-containing water body improver of multiple active microorganisms and a preparation method of the water body improver, belonging to the technical fields of aquaculture and water body improvement. The strain disclosed by the invention is conserved in the China center for type culture collection (CCTCC), the CCTCC NO isM2011443; and the water body improver of the active microorganisms which is based on the strain comprises multiple strains such as Bacillus subtilis, Bacillus licheniformis, Bacillus pumilus, Bacillus cereus, Bacillus megaterium, Rhodopeudomonas palustris, Arthrobacter globiformis, Rhodotorula rubra and Lactobacillus plantarum. The strain is used to perform liquid fermentation and obtain fermentation liquor of which number of live bacteria is 0.5-3*10<10>cfu/mL, bacterial powder of which the number of live bacteria is 0.2-2*10<12>cfu/mL is further prepared; and the bacterial powder is used along with a diluent to prepare a liquid or powdery water body improver, wherein the effective live bacteria of the water body improver is 0.1-3*10<10>cfu/mL(or cfu/g). The water body improver has the function of reducing the contents of ammonia nitrogen, nitrites and nitrates in the culture water body; and the water body improver is suitable for different culture water bodies and has the function of improving the water quality.

The invention discloses a novel compound microorganism living bacteria agent. The agent comprises probiotics such as pediococcus, saccharomyces, bacillus and the like, wherein the total bacterial quantity is above 107 colony-forming units (cfu)/gram. The invention further discloses a method for preparing the novel compound microorganism living bacteria agent and applications of the novel compound microorganism living bacteria agent in preparation of organic sewage purification additives, deodorization fly dispelling agents, degreasing agents, pipeline blockage removing agents, feed additives and microorganism disease prevention agents. The novel compound microorganism living bacteria agent has the comprehensive effects of high removal rates to ammonia nitrogen, total nitrogen and total phosphorus, small sludge residues, energy saving, environmental friendliness and the like and the characteristics of convenience in use, safety and quickness in function, no secondary pollution, benefits to ecological protection, low treatment cost, good comprehensive profit and the like.

The invention relates to a set of electrocatalytic strong oxidizer materials, comprising a nano-function anode material which compounds nano oxide particles and catalyzes metal nano particles on a titanium substrate, and a nano-function cathode material which takes titanium or stainless steel as a substrate and introduces transition metal nano-particles on the surface thereof. By the electro-catalytic advanced oxidation technology, under the catalytic action of electrocatalytic strong oxidizer materials, water body can generate a hydroxyl radical with strong oxidizing performance and an oxygen radical; and if a chloride ion exists in water, hypochlorite can be generated. Under the joint action of a plurality of types of strong oxidizers, the algae cells in the water body and various harmful bacteria can be killed; and simultaneously the ammonia in water and the water-soluble organic matters can be degraded, so the goal of purifying water is achieved. According to the electrocatalytic advanced oxidation theory, the electrocatalytic strong oxidizer materials does not need to add any chemical agent when in application, does not have secondary pollution, and has good safety, high efficiency and low energy consumption.

The invention discloses a microbe complexing agent with high efficiency and method using thereof for processing municipal wastewater. The microbe complexing agent contains 5-20 shares of nitrifying bacteria, 5-20 shares of denitrifying bacteria, 5-15 shares of bacillus brevis, 5-20 shares of photosynthetic bacteria, 1-20 shares of saccharomycete, each grame culture medium of single species bacteria contains 1.0-3.5 hundred million numbers of bacteria. The invention adopts improved bio-contact oxidation process with a microbe complexing agent with high efficiency as main body, adopting soft assembly complexing biology stuff as biology carrier, increaing anoxia step in a integral SBQ biochemistry treating pool to make hydrolysis and good oxygen oxidize as an integer, nitrifying and denitrifying finished in a pool, removing effectively ammonia, nitrogen and phosphor via aeration regulation and regulation of microbe reaction process. The microbe complexing agent is in characterized in high efficiency and no pollution, the waste water processing method with low cost, less invest, low operation cost, and the method has strong adaptability, less mud product, having better economy and social benefit.

The nitrobacteria growth promoter consists of molasses 100 weight portions, metal salt 0.2-2.5 weight portions and adsorbent 1-8 weight portions. The metal salt includes component A of FeSO4 or FeCl2, and component B of MgSO4 and/or CaCl2, in the molar ratio of 10 to (0.5-5). The adsorbent is zeolite powder, diatomite, powdered active carbon, fly ash or their mixture. The nitrobacteria growth promoter is used in biological nitrification process of eliminating ammonia nitrogen and thrown into sewage directly to promote the propagation and growth of nitrobacteria in sewage. It has raised ammonia nitrogen eliminating rate and low cost.

The method of reusing ammonia nitrogen containing effluent as circular cooling water is characterized by the addition of alkali, bicarbonate, carbonate, hydrophosphate, dihydric phosphate or phosphate to increase the scaling factor of water and the cooperation with scale-inhibiting corrosion inhibitor and bactericide to control corrosion, scaling and bacterial growth in the reused effluent. The method of the present invention is suitable for reusing ammonia nitrogen containing effluent as circular cooling water.

The invention discloses a seawater factory-style circulating water fish farming treatment method which comprises, removing the residual bait and excrement from the seawater flowing out of the fish pond through full-automatic conduit pipe filter apparatus, entering foam separate tank from the circulating pump to remove part of the suspended matter and protein, then removing ammonia nitrogen through biological cleaning tank, adjusting water temperature and pH, disinfecting through ultraviolet rays, oxygenation, charging the detected water into the fish pond again, thus completing a circulation.

A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater through a main aerobic biological oxidation zone and therein oxidizing a portion of the BOD a portion of the ammonia nitrogen content (NH3-N); passing the effluent from said aerobic biological oxidation zone to an aerobic/mixing zone and therein mixing said effluent with effluent from the anoxic/anaerobic zone; passing the effluent from said aerobic/mixing zone to a settling zone and therein separating purified wastewater having reduced BOD and suspended solids, and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic/anaerobic zone and therein increasing the extracellular polymer content of said sludge, the release of phosphorus into solution and the reduction of nitrate nitrogen to molecular nitrogen gas; and recycling an effective amount of the effluent from said anoxic/anaerobic zone to said aerobic/mixing zone. In an alternative embodiment, a volatile acid is added to a zone to which no additional oxygen has been added that is in the flow path from the main aerobic biological oxidation zone or, alternatively, it may be added to the anoxic/anaerobic zone and the thus-treated effluent is passed to the aerobic/mixing zone wherein phosphate is removed from the effluent.

The nitrobacteria culture promoter consists of molasses 100 weight portions, ferrous salt 0.2-2.5 weight portions and adsorbent 1-8 weight portions. The ferrous salt includes is sulfate or hydrochloride. The adsorbent is zeolite powder, diatomite, powdered active carbon, fly ash or their mixture. The nitrobacteria culture promoter is used in biological nitrification process of eliminating ammonia nitrogen and thrown into sewage directly to promote the propagation and growth of nitrobacteria in sewage. Through combination with sewage temperature regulation, dissolving oxygen, regulating pH, etc, the nitrification may be completed in short period. It has raised ammonia nitrogen eliminating rate and low cost.