50 results about "Struvite" patented technology

The invention discloses an ecological slope protection material, system and method based on struvite biomineralization technology.The ecological slope protection material comprises a slope stabilization material and a vegetation matrix, the slope stabilization material is composed of an enzyme-induced phosphate precipitation reaction solution and an enzyme-induced carbonate precipitation reaction solution, and through the synergistic effect of the two biomineralization technologies, the slope stabilization material can be used for slope protection. A biological mineralization reaction occurs in the side slope to generate struvite, magnesium carbonate and other minerals, so that side slope tailing sand reinforcement and heavy metal stabilization are realized, and slow-release nutrition is provided for plant growth. The invention further constructs a multi-layer slope protection system comprising a slope lattice beam, an in-situ remediation area, a slope drainage layer and a slope vegetation layer, and the multi-layer slope protection system is achieved through a construction method combined with a special grouting-sprinkling irrigation device. And finally, integrated safety reinforcement and ecological regreening of the side slope of the heavy metal tailings pond are achieved.

The utility model belongs to the technical field of industrial wastewater treatment, and particularly relates to a coking wastewater treatment system for industrial continuous production. Comprising a decomposition bin which comprises a moisture evaporation bin, an ammonia decomposition bin, a horizontal transmission belt penetrating through the moisture evaporation bin and the ammonia decomposition bin, a sedimentation tank, a filter connected to an outlet of the sedimentation tank, and a buffer bin connected to an outlet of the filter. The coking wastewater generates struvite in the sedimentation tank, redundant water is filtered out in the filter, and the struvite is stored in the surge bin and then sent to the decomposition bin. The ammonia gas enters the water evaporation bin through the horizontal conveying belt to evaporate redundant water, and then is fed into the ammonia gas decomposition bin to be thermally decomposed to release ammonia gas. The buffer bin can enable intermittent work of the filter not to affect continuous production of the system, the decomposition bin can achieve continuous evaporation dehydration and thermal decomposition processes, the wastewater treatment efficiency is improved, meanwhile, struvite decomposition products are reused in wastewater treatment, cyclic utilization of resources is achieved, and the energy consumption is reduced. The method has good economic benefits and environmental benefits.

The invention belongs to the technical field of sewage treatment, and discloses a DO-ORP coordinated regulation artificial tidal food web sludge in-situ reduction and phosphorus recovery method. Aiming at the problems of high energy consumption, serious phosphorus resource loss and the like of traditional sludge treatment, a multi-stage food chain consisting of microorganisms, protozoa and metazoan is implanted by constructing an artificial tidal environment with periodic alternation of wetting and drying; according to the method, the metabolic activity of sludge hydrolysis flora and phosphorus-accumulating bacteria is activated by utilizing cooperative regulation and control of DO concentration and ORP, microbial extracellular polymeric substances are triggered to be depolymerized by adopting tidal periodic oscillation, in-situ reduction of sludge biomass is realized by combining a food web cascade predation effect, and phosphorus is synchronously removed by virtue of an anaerobic phosphorus release-aerobic phosphorus uptake coupled struvite crystallization process. The method is suitable for treating the excess sludge of a municipal sewage treatment plant, and the high-purity magnesium ammonium phosphate fertilizer is produced while the dehydration energy consumption is reduced by 40%.

A method of recovery of ammonium phosphate comprises providing a start material (100) comprising struvite into a first aqueous process liquid (101) comprising monoammonium phosphate. The first aqueous process liquid (101) is mixed. Thereby the start material (100) comprising struvite is converted into monoammonium phosphate and / or diammonium phosphate in solution and a residue (103) comprising newberyite as a precipitate. The residue (103) is separated from the first aqueous process liquid (101), thereby giving a second aqueous process liquid (104) comprising monoammonium phosphate and / or diammonium phosphate. At least a part of said second aqueous process liquid (104) or a part of an aqueous process liquid (107, 112) emanating therefrom is returned into the first aqueous process liquid. Phosphoric acid (110) is added. A method for extracting nitrogen from reject water, an arrangement (1) for recovery of monoammonium phosphate and a system for extracting nitrogen from reject water is also disclosed.

The invention belongs to the technical field of sewage treatment, and particularly relates to a lateral flow anaerobic ammonia oxidation effluent deep nitrogen and phosphorus resource recycling method which comprises the following steps: mixing treated anaerobic sludge digestion liquid and untreated anaerobic sludge digestion liquid in an intermediate water tank to form mixed inlet water; adding a magnesium source into the mixed inlet water in the middle water tank to form a middle mixed solution; transferring the intermediate mixed solution into a short-cut denitrification-anaerobic ammonia oxidation coupled struvite reactor, adjusting the pH value of the intermediate mixed solution, and adding a carbon source into the pH-adjusted intermediate mixed solution to form a reaction solution; and carrying out solid-liquid separation on a product obtained after the reaction of the reaction liquid, and discharging the separated liquid or systematically recycling the separated liquid. According to the invention, deep nitrogen removal and phosphorus resource recovery under the condition of low carbon source can be realized, and a new way is provided for subsequent deep treatment of a short-cut nitrification-anaerobic ammonia oxidation process.

The utility model relates to a struvite dephosphorization device for anaerobic effluent, which mainly solves the technical problems of high moisture content, more impurities and the like of products of the existing dephosphorization device. The device comprises a fluidized bed reactor with a cylindrical structure, and the fluidized bed reactor sequentially comprises a collecting area, a reaction area and a settling area from bottom to top. The lower part of the reaction area is provided with a water inlet, a medicament inlet and a reflux inlet which are respectively connected with a water inlet pump, a medicament pump and a reflux pump; a reaction sleeve is arranged at the middle lower part of the reaction area; an aeration head is arranged in the reaction sleeve. And the diameter of the upper barrel of the reaction area is gradually increased and transited to the settling area. A settlement sleeve is also arranged in the settlement area. And the bottom of the sedimentation tank is connected with a reflux pump and a reflux inlet through a pipeline. A gas inlet is formed in the top of the settlement area and connected with an aeration head through a gas pipeline; the gas pipeline is connected with a flowmeter and a gas pump. The bottom of the collecting area is connected with a sludge pump through a pipeline.

The invention relates to a method for optimizing struvite production parameters based on response surface method and Minteq combined regulation and control, and belongs to the technical field of parameter optimization. The invention discloses a method for optimizing struvite production parameters based on response surface method and Minteq combined regulation and control. The method has the following advantages: (1) the pH can be regulated and controlled according to the concentration of heavy metals in wastewater, the concentration of bicarbonate maximizes the recovery rate of phosphorus, the occurrence of heavy metals in struvite products is minimized, and the yield of the struvite products is improved; optimal process parameters are provided for safe and healthy application of agricultural soil fertilization; (2) the adopted response surface method has the characteristics of simple operation, high feasibility and accurate prediction; (3) regulation and control can be performed according to the concentration and alkalinity of heavy metals contained in phosphorus-containing wastewater of pig manure wastewater, and high-quality phosphorus recovery of different types of wastewater is realized; and (4) parameter regulation and control can be carried out according to the measured wastewater with phosphorus recovery value, the dosage of sodium hydroxide is saved, and the cost is greatly saved.

The present invention relates to a fertilizing composition based on renewable phosphate fertilizers by proposing a composition which includes struvite, at least two trace elements, at least one secondary element, and at least one clay.

A sustainable control release fertilizer and a producing method thereof are developed. The sustainable control release fertilizer comprises a natural char / struvite composite with different ratio of the natural char to struvite (0:100, 25:75, 50:50, 75:25). The natural char / struvite composites represent a phosphorus pentoxid content in a range of 16 wt% to 25 wt% which is more than a common phosphate fertilizer. Furthermore, a mole ratio of Mg2+:NH4+:PO4 3- in the sustainable control release fertilizer is 2:1:1. The sustainable control release fertilizer can enhance phosphorus uptake of at least one plant at early stage of growth due to its composition as well as the developed producing method of sustainable control release fertilizer is based on recovery of phosphorus from wastewater that has the good economic and environmental effects.

This utility model relates to the field of wastewater treatment and resource recovery technology, specifically disclosing an integrated device for anaerobic fermentation of sludge to produce biogas and recover phosphorus, including: an anaerobic fermentation unit, a phosphorus recovery unit, a sludge treatment unit, a biogas recovery unit, a dosing unit, and a PLC control device. In this integrated device, after the phosphorus-rich supernatant released from the anaerobic fermentation unit enters the sedimentation tank, the PLC control device adjusts the pH to 8.5-9.0 according to data from a pH monitor, using a sodium hydroxide dosing machine, while simultaneously adding magnesium chloride via a magnesium chloride dosing machine. 2+ , prompting PO4 3‑ NH4 + With Mg 2+ The reaction produces struvite, which is then accelerated by adding PAM through a PAM dosing machine. Finally, the struvite is collected and dried through an inclined tube, realizing the targeted recovery and resource utilization of phosphorus in sludge. This avoids eutrophication of water bodies caused by phosphorus discharge with sludge and significantly improves the utilization rate of phosphorus resources.

The invention belongs to the technical field of environment-friendly fire extinguishing materials, and particularly relates to fire extinguishing powder based on seed crystal induced struvite and a preparation method of the fire extinguishing powder. The method comprises the following steps: by taking nitrogen and phosphorus-rich supernate in a sewage treatment plant as a raw material, firstly removing heavy metal ions in sewage through a cation selective permeable membrane, then adjusting the pH value of the supernate and the ratio of nitrogen to phosphorus, introducing seed crystal to induce struvite (MAP) to crystallize and precipitate, and filtering and drying to obtain seed crystal induced synthesized MAP particles; a horizontal planetary ball mill is further adopted, MAP and a modifier are evenly mixed and ground, and the MAP fire extinguishing powder with the good fire extinguishing performance is prepared. The layered double hydroxide (LDH) is creatively adopted as a seed crystal inducer, the pyrolysis starting temperature of the layered double hydroxide (LDH) can be remarkably increased, meanwhile, the thermal decomposition dynamic process is optimized, and therefore the thermal stability and the fire extinguishing efficiency of the layered double hydroxide (LDH) serving as the dry powder fire extinguishing agent are greatly improved.

The invention relates to a method for transforming dolomite-rich waste into, selectively, dicalcium phosphate, struvite and hydroxyapatite, said method comprising the following steps: 1. Dissolving the dolomite-rich waste using phosphoric acid 2. Precipitating the dicalcium phosphate by increasing the pH 3. Eliminating the calcium by adding ammonium sulfate 4. Precipitating the struvite by increasing the pH 5. Precipitating the hydroxyapatite by increasing the pH and adding calcium

The utility model provides a kind of nitrogen phosphorus recovery device for sewage treatment, comprising: air flotation system, the sewage to be treated enters to air flotation system, the air flotation system is used to form air flotation process, remove residue in sewage;First pH adjusting pool, the sewage after the air flotation system enters the first pH adjusting pool, the first pH adjusting pool is used to adjust sewage to preset pH value.The utility model is by air flotation system and first pH adjusting pool after sewage treatment, in coagulation tank, MgCl2 is added, sewage will occur as follows Reaction Mg 2+ +NH 4+ +PO4 3‑ +6H2O→MgNH4PO4·6H2O↓, so that the struvite "ammonium magnesium phosphate crystal" is generated, then through crystallization pool, sedimentation tank is handled, struvite is separated from sewage, and the struvite separated from sedimentation tank is discharged, to achieve the purpose of recycling struvite.

The invention discloses a treatment and resource utilization method of rural cultivation sewage. According to the method, nitrogen and phosphorus nutrient substances can be obtained through resource recovery on the basis of remarkably reducing the chemical oxygen demand value, the total nitrogen value and the phosphorus phosphate value of the sewage. According to the invention, pollutant components and relative content of actual rural cultivation sewage are fully considered, and organic substances in the sewage are degraded in the anode region through the microbial electrochemical action; phosphate radicals and part of ammonium ions in sewage are deposited on a cellulose membrane in a struvite crystal form in a supersaturated state by utilizing a magnesium ion modified nano cellulose membrane, redundant NH4 < + > is directionally migrated to a cathode region under the action of an electric field and is converted into NH3, and the NH3 is absorbed by an acid solution to form a nitrogen fertilizer. The method realizes resource utilization of nitrogen and phosphorus nutrient elements while efficiently removing pollutants in the rural cultivation sewage, and provides a scientific, economic and efficient method for actual treatment of the rural cultivation sewage.

The invention discloses a preparation method of a struvite slow-release fertilizer based on a sodium alginate binder, relates to the technical field of solid waste utilization, and aims to solve the problems that existing struvite powder is easy to fly and lose, nutrients are released too quickly, and a traditional granulation method is poor in bonding strength, pollutes the environment or dilutes the nutrients and the like. The method comprises the steps of raw material preparation, soft material preparation through mixing, granulation forming, washing and drying. The preparation method comprises the following steps: mixing a sodium alginate solution as a binder with struvite fine powder, carrying out extrusion granulation to form particles, and carrying out ionic cross-linking curing by using a calcium chloride solution to form a calcium alginate gel film. The prepared slow-release fertilizer particles have the advantages of being environmentally friendly, remarkable in synergistic slow-release effect, high in particle strength, mild and simple in process, low in nutrient dilution rate and the like.

The application relates to the technical field of water treatment and resource recovery, and discloses a water body phosphorus recovery method based on a biochar mineral composite material coupling and strengthening, which comprises the following steps: simultaneously adding a polyhydroxy carboxylic acid salt and a soluble borate into wastewater containing phosphate and ammonium ions, adjusting an initial pH to 8.0-8.5; raising the mixed solution to 35-45 DEG C and keeping constant as an incubation period, adding biochar particles loaded with magnesium oxide and maintaining stirring; after the incubation period, lowering the temperature to 10-20 DEG C at a rate of 0.1-0.5 DEG C / min, continuing to maintain stirring and aging; after the aging is completed, discharging the slurry for solid-liquid separation, collecting the filter cake, and obtaining biochar composite particles rich in struvite. The technical scheme that the polyhydroxy carboxylic acid salt and the soluble borate are simultaneously added into the phosphorus-containing wastewater achieves the technical effects of inhibiting initial precipitation at the solid-liquid interface and strengthening internal pore mass transfer.

The present application relates to a kind of for beryllium and thallium pollution in lithium residue-based artificial soil Control method, the control method is to carry out hierarchical repair to lithium residue-based artificial soil, including the following steps: using first composite passivation agent, second composite passivation agent and third composite passivation agent are respectively applied to the ecological function layer, buffer control layer and solidification sequestration layer of lithium residue-based artificial soil, repair is carried out;Wherein, first composite passivation agent includes modified biochar matrix, struvite, humus and microbial inoculant;Second composite passivation agent includes modified biochar matrix and alkaline buffer material;Third composite passivation agent includes modified biochar matrix and strong alkaline solidification material.The present application designs different, multi-level passivation scheme according to the function of each soil layer of artificial soil, realizes accurate repair, to systematically solve the potential risk problem of beryllium, thallium pollution metal vertical migration in lithium residue-based artificial soil, guarantee the safe use of artificial soil.

A method for recovering nitrogen from wastewater, the method comprising: providing (S10) wastewater having dissolved therein ammonium ions. The ratio between the alkalinity, expressed in equivalents per litre, and the molar concentration of dissolved ammonium ions in the wastewater is at least 0.5:1. Adding (S20) struvite to the wastewater, causing struvite to precipitate. During at least a part of the struvite precipitation, degassing (S30) the wastewater. Then separating (S50) the precipitated struvite from the wastewater. Also disclosed is a struvite precipitation reactor arrangement and a circulation arrangement for recovering nitrogen from wastewater.

This invention relates to a method for antibiotic removal using struvite as a carrier during phosphorus recovery from biogas slurry, belonging to the field of water pollution control and resource regeneration. The method involves: firstly, recovering nitrogen and phosphorus from biogas slurry using struvite crystallization. The initial pH of the biogas slurry is adjusted to 8.0-10.5, and the mixture is thoroughly stirred. A certain amount of magnesium source is added to initiate the struvite crystallization reaction. Simultaneously, a certain amount of persulfate PMS oxidant is rapidly added, and the reaction pH is adjusted to 8.0-10.5. The mixture is stirred evenly, and the reaction time is controlled at 20-90 minutes, effectively removing antibiotics from the biogas slurry. This invention, while ensuring a high yield of struvite recovery from biogas slurry, accelerates electron transfer rates through struvite crystallization, improving the efficiency of PMS degradation of antibiotics. It provides a simple and effective method to reduce the ecological risks caused by antibiotics during biogas slurry struvite recovery.

The invention discloses a microbial ardealite mineralization method based on electric field induction. The method comprises the following steps: S1, mixing a mineralized dry material, a microbial bacterial liquid and a curing agent containing calcium and magnesium ions, and dispersing to prepare ardealite mineralized primary pulp; s2, applying an electric field in the mineralization process of the phosphogypsum mineralization primary pulp, inducing ions to directionally migrate under the action of the electric field, and promoting the sediment to cure harmful substances; an electric field is applied to the microbial phosphogypsum mineralization process to induce directional movement of anions and cations in phosphogypsum mineralization primary pulp, under the tendency of relative movement of the anions and cations, the anions and cations are promoted to be combined to generate hydroxyapatite, struvite and calcium carbonate precipitates, and the purpose of promoting generation of phosphogypsum mineralization products is achieved; when the phosphogypsum slurry is solidified, cations move towards the cathode, and heavy metal ions are mostly high-valence cations, large in radius and prone to being complexed by SO4 < 2-> in the phosphogypsum slurry, so that compared with calcium and magnesium ions, the heavy metal ions move slowly and are easily solidified by precipitates, and the solidification efficiency of the heavy metal cations is improved.

The invention relates to the technical field of wastewater treatment, in particular to a white wine cellar bottom water resource recycling method which comprises the following steps: 1, adding mineral substances into white wine cellar bottom water; the mineral substances comprise diatomite and / or plant ash; 2, performing magnesium ion addition treatment and pH regulation treatment on the cellar bottom water obtained after the minerals are added in the step 1, and fully reacting to obtain a precipitate and a clear liquid; the molar ratio of the magnesium ions to the phosphate ions is (0-3): 1 in the cellar bottom water after the magnesium ions are added into the cellar bottom water; pollutants are adsorbed by adding plant ash or diatomite, a synergistic effect of adsorption-concentration-crystallization is formed by coupling with a struvite crystallization technology, key pollution factors (phosphorus and nitrogen) in cellar bottom water are efficiently, deeply and synchronously removed, and the finally generated struvite-mineral complex is an ideal slow-release fertilizer. And the purity of struvite reaches 92%.

The biomass energy comprehensive utilization system is characterized in that microorganisms in a first anaerobic reactor decompose organic matters in wastewater to generate biogas; ammonia nitrogen and nitrite nitrogen are converted into nitrogen in the first anaerobic ammonia oxidation reactor; solid particles in the wastewater are separated by the water separator; organic matters in the wastewater are decomposed into biogas in the second anaerobic reactor; magnesium ions, phosphate and ammonium ions in the struvite reaction tower react to generate struvite; ammonia nitrogen and nitrite nitrogen are converted into nitrogen in the second anaerobic ammonia oxidation reactor; denitrifying bacteria in the anoxic tank degrade nitrate by using organic matters in the wastewater to generate nitrogen; ammonia nitrogen in the aerobic tank is converted into nitrate, part of the nitrate-containing wastewater flows back to the anoxic tank, and the remaining part of the nitrate-containing wastewater is conveyed to a primary sedimentation tank; activated sludge in the wastewater is separated out through precipitation, one part of the wastewater flows back to the anoxic tank, and the remaining activated sludge is discharged to a sludge dewatering workshop; and adding a flocculating agent into the phosphorus-containing wastewater, and precipitating phosphorus in the secondary sedimentation tank.

The invention discloses a struvite organic fertilizer and a preparation method thereof, and belongs to the technical field of organic fertilizers. The struvite organic fertilizer is prepared from the following raw materials in parts by weight: 10 parts of mineral source potassium fulvate, 310 parts of struvite ore powder, 670 parts of humic acid and 10 parts of magnesium sulfate. In the struvite organic fertilizer, the number of effective active bacteria is greater than or equal to 0.5 billion / g, and the content of organic matters is greater than or equal to 40wt%. According to the struvite organic fertilizer, calcium, phosphorus, silicon, magnesium and other medium trace elements in struvite ore are fully reserved, humic acid and mineral source potassium fulvic acid are added, soil can be improved to a greater extent, the content of organic matter is increased, root growth is promoted, the disease resistance of plants is improved, flower bud differentiation is promoted, quality is improved, and the effect of increasing both production and income is achieved.

The application provides a method for preparing high value-added products by comprehensive utilization of phosphor tailings, which comprises the following steps: firstly, high-temperature forging and decomposition of the phosphor tailings to obtain calcined powder; then, water digestion and carbonization by introducing appropriate CO2 to obtain first filter residue containing calcium carbonate and first filtrate; adding hydrochloric acid to the first filter residue for acid leaching and filtering separation to obtain second filter residue containing SiO2 and second filtrate containing CaCl2; adding a certain amount of NH3H2O to the second filtrate containing CaCl2 and introducing a certain amount of CO2 for carbonization, and then filtering separation to obtain light calcium carbonate and third filtrate containing NH4 + ; adding an alkaline solution to the first filtrate for filtering separation to obtain magnesium hydroxide and fourth filtrate with alkalinity. The method is simple, and the obtained light calcium carbonate and magnesium hydroxide meet the preparation standards of the industry. The fourth filtrate is reacted with the third filtrate, magnesium-containing and phosphorus-containing components are supplemented into the reaction system, struvite is generated by crystallization, waste liquid generation and discharge are avoided, and the value-added utilization of industrial by-products is easy to realize.

The invention discloses a method for efficiently removing heavy metal ions in livestock and poultry manure, which adopts an eluting agent to form a stable chelate with the heavy metal ions through a coordination effect, realizes efficient total removal of the chelate from a manure solid phase, and breaks through the limitation that only the bioavailability can be reduced by a traditional passivation technology. The manure solid phase is subjected to neutral adjustment and then mixed with straw, a compound microbial agent composed of cellulose decomposition bacteria, nitrogen-fixing bacteria and phosphate solubilizing bacteria is inoculated, aerobic fermentation is carried out, and the high-quality organic fertilizer is prepared; leacheate containing heavy metal is subjected to electric-PRB combined treatment, the heavy metal is promoted to be enriched on a PRB material by utilizing electroosmotic flow and electrophoretic migration, and then phosphorus resources are recovered by a struvite crystallization process. According to the method, the removal rate of copper in the livestock and poultry manure is 96.2%, the removal rate of zinc in the livestock and poultry manure is 91.3%, the removal rate of cadmium in the livestock and poultry manure is 98.0%, the agricultural-grade organic fertilizer and the phosphorus recovery liquid are obtained, the process is flexible, the cost is low, industrialization popularization is easy, and the method is suitable for manure treatment of different livestock and poultry types and pollution levels.

The present application relates to a kind of struvite composite material and its preparation method and application, the struvite composite material can convert the large amount of struvite sludge formed when sewage treatment plant is urgently recycled and utilized to composite nanomaterial of core-shell structure, then utilize the product as adsorbent after high temperature calcination of this material, such as landfill leachate and other high ammonia nitrogen, high COD wastewater is adsorbed and handled, realize the effect of efficient removal of ammonia nitrogen and organic matter in wastewater, purify water quality;Simultaneously, the composite material has unique memory effect in structure, after high temperature calcination after adsorbing wastewater, can have adsorption function, realize renewable cyclic use.Further, the preparation method and process of the composite material are simple, raw material cost is low, supply is large, environmental friendly, wide applicability, reaction condition is mild, can greatly reduce production and input cost, suitable for popularization and application.

The application discloses a device and method for realizing high-efficiency recovery of phosphorus and PHAs by fermenting aerobic phosphorus-removing granular sludge, and belongs to the technical field of sewage biological treatment. The device comprises a difficult-biodegradable carbon source, an ammonia nitrogen and phosphate influent tank, a granular sludge reactor, a PHAs recovery tank, a phosphorus and ammonia nitrogen effluent tank, a pH regulator influent tank, a magnesium solution influent tank, a struvite reactor, a phosphorus recovery tank, an effluent tank and an online monitoring system. The method comprises the following steps: in an anaerobic stage, the difficult-biodegradable carbon source is converted into easily-biodegradable carbon source and stored as PHAs and phosphorus release; supernatant and granular sludge are discharged at the end of the anaerobic stage to realize recovery of phosphorus and PHAs, and meanwhile, sludge granulation is promoted by regulating non-stirring and sedimentation time of influent; and in an aerobic stage, excess phosphorus is absorbed. The application creatively solves the technical problems that the phosphorus-removing aerobic bacteria cannot utilize the difficult-biodegradable carbon source to realize simultaneous recovery of phosphorus and PHAs, and that external ammonia nitrogen needs to be added to match the phosphate for struvite formation.

The utility model provides an industrial wastewater denitrification treatment device which comprises a carrying table, a primary filtration module is mounted on one side of the top of the carrying table, an ion exchange module is mounted on the other side of the top of the carrying table, a treatment cylinder is mounted in the center of the top of the carrying table, and a top cover is arranged at the top of the treatment cylinder. Compared with the prior art, the device disclosed by the utility model has the following beneficial effects that the filter plate and the activated carbon filter screen of the primary filter box can effectively remove impurities and part of pollutants in wastewater, so that good conditions are provided for subsequent reaction; due to the special design of the stirring assembly, sufficient mixing of wastewater and chemicals is achieved, and the struvite generation efficiency is improved; the ion exchange resin plate further removes residual nutrient substances, so that the denitrification treatment is more thorough, the quality of treated wastewater is better, the risk of eutrophication of a water body is effectively reduced, nitrogen and phosphorus are removed by generating struvite, and meanwhile, the recycling of resources is realized.

This invention belongs to the fields of environmental engineering and solid waste resource utilization technology, specifically relating to a method for preparing a residue-based adsorbent for deep phosphorus extraction from sewage sludge. The preparation method includes the following steps: S1, adjusting the sewage sludge to a moisture content of 90% and performing a first-stage hydrothermal carbonization, after which hydrothermal carbon and aqueous product 1 are separated; S2, leaching the hydrothermal carbon in a mixed acid, after which phosphorus extract and leaching residue are separated; S3, performing MAP precipitation of the phosphorus extract using struvite, after which struvite is obtained to achieve phosphorus recovery, and residual extract is separated; S4, performing a second-stage hydrothermal carbonization on the leaching residue, adding a mixture of aqueous product 1 and residual extract before the reaction, adjusting the solid-liquid ratio to 1:10; after the reaction, solid product and aqueous product 2 are separated; S5, rinsing the solid product and then drying it, after which a high-efficiency residue-based adsorbent is obtained.

The present application belongs to the technical field of wastewater treatment, and relates to a method for simultaneously removing ammonia nitrogen and organic pollutants in landfill leachate. In view of the technical problem that the existing technology has poor removal effect on high-concentration ammonia nitrogen and organic pollutants in landfill leachate, limits the subsequent biochemical treatment effect, and easily causes a huge impact on the biochemical treatment system, the present application provides a method for simultaneously removing ammonia nitrogen and organic pollutants in landfill leachate, which comprises the following steps: performing a struvite crystallization reaction on the landfill leachate; performing solid-liquid separation after gravity sedimentation to obtain upper liquid and crystals; adjusting the pH value of the upper liquid to 2.0-3.0, adding struvite and H2O2, the struvite addition amount is 2 g / L-20 g / L, V(H2O2) / m(struvite) is 0.25 mL / g-5 mL / g, performing a photocatalytic reaction at constant temperature to obtain a photocatalytic reaction liquid, and filtering to obtain the photocatalytic reaction liquid. The method can greatly remove ammonia nitrogen and organic pollutants in the landfill leachate before the landfill leachate enters the biochemical treatment, improve the biodegradability of the landfill leachate, reduce the impact load of the biochemical treatment, and simplify the whole process flow.