31results about How to "Improve phosphorus removal effect" patented technology

The invention discloses a phosphorus removal filler and a preparation method and application thereof, and belongs to the technical field of fillers. Sulphoaluminate cement, chitosan, sodium alginate and calcium peroxide are uniformly mixed in a nitric acid solution in an amino-containing coupling agent, then foaming and pore forming are performed under steam, and the phosphorus removal filler is prepared. And finally, uniformly mixing with titanium dioxide, sodium silicate, a ferrous sulfate solution and sodium borohydride to obtain the phosphorus removal filler with an excellent phosphorus removal effect, and the phosphorus removal filler has a rich pore structure and adsorption activity, can sufficiently perform physical adsorption on phosphorus elements, and has a good phosphorus removal effect. Meanwhile, the phosphorus removal filler further has excellent surface complexing activity and photocatalysis, insoluble salt precipitates can be generated through reaction of iron elements and calcium elements and phosphate in water, so that total phosphorus is removed, the material is ground after adsorption saturation and put into a fish pond to serve as a phosphorus supplementing material, resource recycling can be achieved, and the cost is reduced. Wide application prospects are realized.

The invention discloses a method for enhancing nitrogen and phosphorus removal effects of a whole-course autotrophic nitrogen removal system, and belongs to the technical field of sewage treatment. According to the method, the steel slag powder and the steel slag particles are applied to a nitrification section and a sulfur autotrophic denitrification section respectively, alkalinity consumed by nitrification is supplemented by adding the steel slag powder in the nitrification section, enrichment of nitrifying bacteria is facilitated, metal ions leached from the steel slag powder improve the ammonia nitrogen removal rate, meanwhile, part of phosphate is removed, and the ammonia nitrogen removal rate is increased. The average removal rate of ammonia nitrogen is 99.75%, and the average removal rate of phosphate is 23.22%. According to the invention, the denitrification potential and denitrification effect of the sulfur autotrophic denitrification section are improved, and when the HRT is 3h, the average 97.04% of total nitrogen and the average 86.4% of total phosphorus can be removed; in the denitrification process, metal ions leached from the steel slag can generate precipitates with phosphate, and H < + > generated in the denitrification process can accelerate erosion of the steel slag, so that the phosphorus removal capacity of the steel slag is improved.

The invention discloses a material and method for reducing the content of heavy metals and nitrogen and phosphorus in bottom mud, the material is suitable for reducing the content of heavy metals and nitrogen and phosphorus in bottom mud, and the material comprises the following components in parts by mass: 100 parts of calcareous shale, 20-40 parts of steel slag, 6-10 parts of activated carbon powder and 6-10 parts of medium-coarse sand; the sintering material is formed by sintering a mixed material, and the mixed material comprises the following components in parts by mass: 100 parts of calcareous shale, 20-40 parts of steel slag, 6-10 parts of activated carbon powder and 6-10 parts of medium-coarse sand; and 2-4 parts of an adhesive. The material for reducing the contents of heavy metals and nitrogen and phosphorus in the bottom mud not only blocks the pollution of sludge to water quality, but also effectively reduces the contents of heavy metals and nitrogen and phosphorus nutrients in the bottom mud in situ, and can reduce the thickness of the bottom mud, improve the characteristics of the bottom mud and really realize harmless treatment of the bottom mud.

The invention discloses a slow-release phosphorus removal material and a preparation method and application thereof, and belongs to the technical field of sewage treatment, the slow-release phosphorus removal material comprises the following components by mass: 40-55 parts of calcium peroxide, 25-35 parts of a binder, 2-5 parts of bentonite, 5-20 parts of calcined oyster shell powder, and 10-25 parts of iron-loaded modified red soil; the binder is prepared from Portland cement, polyacrylic acid and hydroxypropyl methyl cellulose ether according to the mass ratio of 1: (0.2 to 1): (0.1 to 0.8). Under the synergistic effect of the calcium peroxide, the binder, the bentonite, the calcined oyster shell powder and the iron-loaded modified red soil, the filter material can be used as a phosphorus removal filter material, can be directly used as a filter material of a filter tank, a wetland and the like independently or in combination with quartz sand, gravel and other filter bed filter materials, can permanently remove phosphorus in surface water, can also be directly put into rivers, lakes and ponds, and can be used as a filter material of a filter tank, a wetland and the like. In addition, the preparation cost is low, and wide application prospects are achieved.

The invention relates to a mine wastewater dephosphorization treatment system and a dephosphorization method, and belongs to the technical field of water dephosphorization. Iron nitrate nonahydrate and ferric chloride hexahydrate are creatively used as iron sources, glucose is used as a carbon source and a reducing agent, urea is used as an alkali source, a granular material with ferroferric oxide as a core and a carbon layer as a shell is synthesized on the basis of a hydrothermal synthesis method, then an aqueous hydrogen peroxide solution is used for further oxidation treatment, more oxygen-containing groups are constructed, and the oxygen-containing groups are prepared. The preparation method comprises the following steps: preparing a metal lanthanum modified material, then adding lanthanum chloride for doping lanthanum to obtain the metal lanthanum modified material, and finally, sequentially carrying out surface modification on the metal lanthanum modified material through polydopamine and an amino silane coupling agent to prepare the phosphorus removal agent, so that when the phosphorus removal agent is used for removing phosphorus from mine wastewater in a phosphorus removal treatment system provided with an electromagnet, only simple magnetic attraction treatment is needed, and the phosphorus removal efficiency is greatly improved. The dephosphorization agent can be separated and recycled through the method, meanwhile, metal lanthanum in the dephosphorization agent is still dissolved out less even though the dephosphorization agent is used for mine wastewater with high acidity, and the dephosphorization effect is very good.

The utility model relates to the technical field of dephosphorization equipment, and provides attapulgite deep dephosphorization equipment convenient to clean, which comprises a main body and a support column, supporting columns are uniformly arranged at the bottom end of the main body, a sewage inlet is formed in one side of the top of the main body, and phosphorus removal structures are uniformly arranged on the outer side of the top end of the main body; a water outlet is formed in one side of the bottom of the main body, a water outlet valve is arranged in the water outlet, and a stirring structure is arranged in the middle of the top end of the main body. By arranging the stirring structure, the motor is started to drive the stirring shaft to rotate, so that the stirring rod stirs the interior of the main body, phosphorus is more uniformly contacted with attapulgite, and the phosphorus removal effect is improved; while the treated water is filtered by the filter screen, the anti-blocking scraper is driven to rotate by a group of meshing gears at the bottom end of the stirring shaft, so that the blockage caused by impurities on the outer side of the filter screen is prevented, and the purposes of improving the phosphorus removal effect and preventing blockage are achieved.

The invention provides a degradation-resistant wastewater treatment system, which comprises: a chemical oxidation system, which comprises an acid adjusting tank, an electro-Fenton reaction tank, an alkali adding neutralization tank and a solid-liquid separation tank which are sequentially connected along a water flow direction; and the biochemical system comprises a denitration selection tank, an anaerobic tank, an anoxic tank, at least one aerobic tank and an eMBR membrane tank which are sequentially connected along the water flow direction. Compared with the prior art, the non-degradable wastewater treatment system has the advantages that the denitration selection tank is additionally arranged at the front end of the anaerobic tank, nitrite nitrogen returned by sludge is removed by using a raw water carbon source, the influence on the growth of phosphorus-accumulating bacteria is reduced, the phosphorus removal effect is improved, an anaerobic ammonia oxidation generation environment is created, and the denitrification effect of the system is enhanced.

The invention discloses a surface quasi-class II drinking water source water replenishment and regeneration treatment system and method, comprising an aerated grit chamber, a biological treatment section, an MBR tank, an ozone oxidation section, a sludge concentration and decomposition tank, a disinfection section and an artificial wetland section; the biological treatment section comprises a pre-anoxic zone, an anaerobic zone, a primary aerobic zone, a primary anoxic zone, a secondary aerobic zone and a secondary anoxic zone; the water outlet of the aerated grit chamber is respectively connected with the water inlets of the pre-anoxic zone, the anaerobic zone, the primary anoxic zone and the secondary anoxic zone; the water outlet of the secondary aerobic zone is connected with the water inlet of the pre-anoxic zone; the sludge outlet of the MBR tank is connected with the sludge inlet of the primary aerobic zone; the sludge outlet of the MBR is connected with the sludge inlet of the sludge concentration and decomposition tank, the sludge lysate outlet of the sludge concentration and decomposition tank is connected with the pre-anoxic zone, and the residual sludge of the sludge concentration and decomposition tank is processed into a mud cake and enters the artificial wetland. The surface quasi-class II drinking water source water replenishment and regeneration treatment system of the invention has the advantages of good treatment effect and low operation cost.

The invention relates to the technical field of sewage treatment, in particular to a multi-point water inlet inverted A / A / O mud film composite MBBR sewage nitrogen and phosphorus removal device and method.The sewage sequentially enters an anoxic tank, an anaerobic tank and an aerobic tank, and effluent of the aerobic tank flows back into the anoxic tank through a lifting pump and is mixed with sewage in the anoxic tank to form a mixed solution for nitrogen removal through denitrification; effluent of the anoxic tank enters an anaerobic tank to synthesize PBH for storage, and phosphorus is discharged at the same time; effluent of the anaerobic tank enters an aerobic tank, ammonia nitrogen in the sewage is converted into nitrate nitrogen by nitrifying bacteria, and phosphorus in the sewage is excessively absorbed by phosphorus-accumulating bacteria; effluent of the aerobic tank flows to the secondary sedimentation tank, one part of sludge in the secondary sedimentation tank flows back to the anoxic tank, and the other part of the sludge is discharged as residual sludge, so that phosphorus is removed, the nitrogen and phosphorus removal effect is improved, an organic carbon source in sewage is effectively utilized, the carbon source requirement of anoxic denitrification is reduced, and the energy consumption of sewage treatment is reduced.

The invention relates to the technical field of slow-release phosphorus removal materials, and particularly discloses a slow-release phosphorus removal material and a preparation method and application thereof. The slow-release phosphorus removal material is prepared from the following raw materials in parts by weight: 95-105 parts of harmless aluminum ammonium alum slag; 1-3 parts of an exciting agent; 5-8 parts of a curing agent; 2-3 parts of water; the preparation method comprises the following steps: mixing and grinding the harmless aluminum ammonium alum slag and the exciting agent to obtain aluminum-based micro powder; the aluminum-based micro powder, a curing agent and water are mixed and laid in a mold, and cold press molding is conducted to obtain a prefabricated blank; the prefabricated blank is subjected to hot pressed sintering, the temperature is increased to 300-400 DEG C within 30 min, heat preservation is conducted for 4-6 min, then the temperature is increased to 500-600 DEG C within 20 min, heat preservation is conducted for 4-6 min, and the slow-release phosphorus removal material is obtained after cooling and demolding. When the slow-release phosphorus removal material is applied, organic synergy of chemical phosphorus removal and physical adsorption phosphorus removal can be formed, the advantages of a chemical method and a physical method are achieved, the effect of slowly releasing aluminum can be achieved, and the utilization rate of aluminum ions in the phosphorus removal process and the phosphorus removal continuity are improved.

A composite dephosphorization integrated device comprises a sewage tank, a reaction tank and an adsorption tank which are sequentially connected, an aerator is arranged on the outer wall, close to the sewage tank and the adsorption tank, of the reaction tank and at the end close to the ground, and a stirring structure is arranged in the center in the reaction tank. A scraping structure is arranged at the end, away from the ground, of the stirring structure. A spraying ring pipe and rotary adsorption structures are arranged in the adsorption tank, and the rotary adsorption structures comprise a first rotary adsorption structure and a second rotary adsorption structure. According to the composite phosphorus removal integrated device disclosed by the invention, the sewage tank, the reaction tank and the adsorption tank are arranged, so that total phosphorus in sewage is synergistically and compositely removed, and a rotary adsorption structure is arranged in the adsorption tank, so that the capability of adsorbing organic phosphorus by active coke is greatly improved; and finally, sewage which does not reach the standard can be subjected to repeated phosphorus removal treatment by arranging a circulating pipeline, so that the phosphorus removal capability is improved.

The invention discloses a compound agent for deep phosphorus removal of domestic sewage, a preparation method and a use method, and aims to solve the technical problem that the phosphorus removal effect of a current agent is unsatisfactory, the compound agent comprises polyaluminum ferric chloride and aluminum sulfate according to the ratio of 1%-10%: 90%-99%; the method comprises the step of uniformly mixing polyaluminum ferric chloride and aluminum sulfate, the use method comprises the following steps: (1) adding the compound agent into raw water to be treated in the efficient sedimentation tank of the domestic sewage treatment plant; mixing by using a stirrer; (2) adding a coagulant aid and stirring; (3) standing and precipitating, wherein supernate is treated water; the invention aims to optimize the phosphorus removal performance by scientifically proportioning two main components, namely PAFC (polyaluminum ferric chloride) and aluminum sulfate, overcome the defects in the prior art and realize a more efficient and economical phosphorus removal effect so as to meet the requirements on deep phosphorus removal in current and future domestic sewage treatment.

The invention discloses a device and a method for coupling Fenton residual iron sludge with iron ammoxidation and anaerobic ammoxidation. The device comprises a water inlet tank, a five-section reactor, a secondary sedimentation tank and a Fenton reactor which are connected in sequence. According to the method, iron sludge (containing ferric iron) generated by a Fenton reactor flows back to a five-section reactor to realize enrichment of iron ammonium oxidation flora in activated sludge, nitrite and nitrate nitrogen generated by iron ammonium oxidation are directly or indirectly utilized by anaerobic ammonium oxidation bacteria on filler, and anaerobic ammonium oxidation reaction is performed; nitrate nitrogen generated in the aerobic zone can be subjected to short-cut denitrification anaerobic ammonia oxidation reaction by utilizing a carbon source and ammonia nitrogen in inlet water for denitrification. According to the method, reduction and innocent treatment of the Fenton iron sludge are realized, and refractory organic matters are removed while high nitrogen and phosphorus removal efficiency of the industrial wastewater is realized.

The enhanced phosphorus removal anaerobic device comprises a hollow tower body and a degassing device, a wastewater mixed solution with activated sludge enters a lower layer area of the hollow tower body, the mixed solution rises in the hollow tower body and enters a degassing cover, a stirring device is started, the output end of the stirring device rotates at a high speed, and the degassing cover is opened; the mixed liquid in the degassing cover generates centrifugal force due to high-speed rotation of the stirring device, a negative-pressure vortex is formed in the center of the mixed liquid, dissolved oxygen in the mixed liquid is separated upwards from the center of the vortex, the mixed liquid is dispersed around the vortex, an absolute anaerobic environment is formed in the mixed liquid, and phosphorus-accumulating bacteria in the sludge can be degraded due to the absolute anaerobic environment. The phosphorus-accumulating bacteria release all phosphorus in the body, the sludge and the wastewater which release all phosphorus are subsequently discharged into the aerobic tank, and because all phosphorus in the body is released by the phosphorus-accumulating bacteria, more phosphorus in the wastewater can be absorbed in the aerobic tank, so that the phosphorus absorption effect of the phosphorus-accumulating bacteria is enhanced, and the phosphorus removal efficiency of the whole system is improved.

The invention belongs to the field of wastewater treatment, and discloses a method for inhibiting low-temperature sludge bulking by adding diatomite. The method comprises the following steps: treating sewage by adopting an activated sludge process under the condition that the water temperature is 4-15 DEG C, monitoring the settling property of the sludge during sewage treatment, adding a diatomite dispersion liquid into a biochemical reaction zone when the sludge expands, so that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L, and after the diatomite dispersion liquid is added, adding the diatomite dispersion liquid into the biochemical reaction zone to ensure that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L, so that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L; the inhibition of low-temperature sludge bulking can be realized; the diatomite dispersion liquid is obtained by fully dispersing diatomite with the particle size of 2-50 microns in water. The invention provides a more economical and efficient method for controlling low-temperature sludge bulking.

The invention relates to the technical field of wastewater phosphorus removal, in particular to a modified phosphorus tailing phosphorus removal adsorbent, a preparation method thereof and application of the modified phosphorus tailing phosphorus removal adsorbent in phosphorus-containing wastewater phosphorus removal. The preparation method comprises the following steps: grinding phosphate tailings, sieving with a 200-mesh sieve, drying to obtain pretreated phosphate tailings, and calcining the pretreated phosphate tailings in a muffle furnace at 500-1050 DEG C for 0.6-3 hours to obtain the modified phosphate tailing dephosphorization adsorbent. The dephosphorization conditions are as follows: the pH value of a phosphorus solution before reaction is 4-9, the reaction temperature is 37 DEG C, the rotating speed is 200r / min, the reaction time is 0.7-48h, and the maximum adsorption capacity can reach 112.41 mg / g. And combining the calcined phosphate tailings and the uncalcined phosphate tailings according to a certain mass ratio to prepare the unfired ceramsite. The method provided by the invention is simple and economic, and can effectively utilize phosphate tailing resources to prepare the high-performance adsorbent.

The invention discloses a sequencing batch activated sludge method for removing phosphorus in cooling circulating water of a power plant by taking ammonia nitrogen as a nitrogen source, and belongs to the technical field of water treatment. When ammonia nitrogen is used as a nitrogen source and nitrate nitrogen is used as a nitrogen source to directly remove phosphorus from the circulating cooling water of the power plant, the phosphorus removal effect is poor, and the inlet water quality and the operation mode of the reactor need to be adjusted to a certain degree to improve the phosphorus removal effect. Therefore, the optimal water inlet condition and the reactor operation condition during the operation of the two processes are explored by simulating the circulating cooling water, so that the phosphorus removal effect of the reactor on the circulating cooling water of the power plant is improved and contrastive analysis is carried out; after the phosphorus removal effect reaches the standard, the water inlet condition and the operation mode of the reactor are adjusted, so that the operation and maintenance cost of the reactor is reduced on the premise that the effluent TP meets the requirement.

The utility model discloses a dephosphorization agent distribution device for a sewage treatment plant, which comprises a support frame and a distribution box body arranged on the support frame, the top surface of the distribution box body is opened, and a cover body is arranged on the top surface of the distribution box body; a steady flow plate and an overflow plate are arranged in the distribution box body, and the steady flow plate and the overflow plate are arranged in parallel at an interval so as to divide the distribution box body into a medicine inlet cavity, a steady flow cavity and a distribution cavity; a medicine inlet is formed in one side wall, corresponding to the medicine inlet cavity, of the distribution box body; a plurality of flow stabilizing holes are uniformly distributed in the lower part of the flow stabilizing plate; a plurality of partition plates are arranged in the distribution cavity, all the partition plates are arranged in parallel at intervals and are perpendicular to the overflow plate so as to divide the distribution cavity into a plurality of distribution grooves, meanwhile, a plurality of V-shaped overflow grooves are formed in the overflow plate, the number of the V-shaped overflow grooves corresponding to the distribution grooves is equal, and a medicine outlet is formed in the position, corresponding to the bottom of each distribution groove, of the bottom of the distribution box body. According to the dephosphorization device, the dephosphorization agent can be uniformly distributed, a good dephosphorization effect can be obtained under the condition that the dosage is small, and the equipment investment is reduced.

The invention relates to the technical field of sewage treatment, and particularly discloses a low-concentration municipal sewage aerobic granular sludge rapid culture and stable operation method which comprises the following steps: adding sodium acetate, monopotassium phosphate and allyl thiourea into low-concentration municipal sewage of which the COD (Chemical Oxygen Demand) is less than or equal to 200mg / L; after addition, the COD concentration of the inlet water is increased by 100-200mg / L, the PO4 < 3->-P concentration is increased by 2.5-5.0 mg / L, and the ATU concentration is increased by 5-10mg / L; then inoculating activated sludge of a common municipal sewage treatment plant into the reactor, wherein the concentration of the activated sludge is 3000-6000 mg MLSS / L; culturing the aerobic granular sludge, wherein the time length of each period is 3-4 hours, and water feeding, stirring, aerating, precipitating and water discharging are performed in sequence; the volume exchange ratio of each period is 33%-50%; when the granulation rate reaches 80% or above, a stable operation period is started; at the moment, only low-concentration municipal sewage is used for feeding water, each period is 4-6 hours, and the volume exchange ratio of each period is increased to 50%-75%. The invention aims to solve the problems that the starting period is long and the aerobic granular sludge is difficult to maintain stably when low-concentration municipal sewage is used for culturing the aerobic granular sludge.

This invention discloses an online detection method for the working status of a descaling nozzle in a rolling mill, relating to the field of hot rolling technology. Its main purpose is to avoid product waste, reduce production costs, and improve detection efficiency. The main technical solution of this invention is as follows: The detection method includes: placing a calibration plate coated with a detection coating at a designated position above the work rolls of the rolling mill; activating the descaling nozzle of the rolling mill and continuing for a first preset time to allow descaling water to wash over the detection coating, forming watermarks; acquiring characteristic parameters of the watermarks, including morphological and positional parameters; and determining the working status of the descaling nozzle based on a comparison of the characteristic parameters with preset parameter thresholds.

The utility model discloses a dephosphorization hot-rolled steel bar system, including dephosphorization mechanism, heating mechanism, reducing machine in proper order, dephosphorization mechanism includes first support, dephosphorization subassembly, dephosphorization subassembly installs in the top of first support, steel bar passes through dephosphorization subassembly and is dephosphorized, heating mechanism includes second support and heating subassembly, the heating assembly is arranged on the top of the second support, the dephosphorized steel bar penetrates through the heating assembly to be heated at high temperature, the steel bar heated at high temperature enters the diameter reducing machine to be subjected to diameter reducing treatment, and a tensile machine used for pulling the steel bar to move transversely is arranged at the rear end of the diameter reducing machine. The steel bar dephosphorization device not only can meet the production requirements of steel bars, but also has the advantages of no pollution and good dephosphorization effect.

The invention belongs to the field of microbial technology and environmental protection technology, and discloses a method for removing inorganic phosphorus from high-salinity wastewater by using a mixed community of marine biofilms. The method comprises collecting marine biofilm samples and culturing microorganisms; extracting DNA of the cultured strains for PCR amplification and Sanger sequencing to determine the classification of the isolates; annotating the genome of each strain to determine whether there is ppk1、ppk2 and pap Genes are used to determine whether it is a polyphosphate bacteria; bacterial strains with phosphorus removal ability are inoculated and cultured and the absorbance value is adjusted to obtain a mixed community of marine biofilms; the mixed community of marine biofilms is enriched and cultured with a seawater salt concentration culture medium (marine broth 2216E), and the phosphate removal efficiency of the mixed community is measured with a 2216E liquid culture medium with phosphate added. When the initial phosphorus concentration is 26.5 mg / L, the phosphorus removal efficiency of the present invention reaches 73.97% in 72 hours, providing a new direction for biological phosphorus removal.

The invention provides a biological contact oxidation method and a biological contact oxidation system, which are applied to the technical field of water pollution control and treatment, and the method comprises the following steps: introducing sewage into a reaction tank of the biological contact oxidation system, and treating the sewage based on an iron-carbon filler and activated sludge in the reaction tank; wherein microorganisms in the iron-carbon filler and the activated sludge are subjected to a coupling reaction to jointly treat the sewage. According to the biological contact oxidation method and system provided by the invention, an acidic biofilm is formed on the surface of the iron-carbon filler by using microorganisms to provide an acidic environment and promote the generation of micro-electrolysis, decomposed iron ions can enhance the settling performance of activated sludge and enhance the sewage dephosphorization effect, and activated carbon can adsorb pollutants in sewage, so that the sewage treatment effect is improved. The sewage purification effect is improved. The iron-carbon filler has the effect of promoting short-cut nitrification and denitrification of microorganisms, the required aeration rate is low, and energy conservation and consumption reduction are facilitated. The whole process does not need to add an acid-base agent, so that the process is simplified, and the influence on the sewage purification effect is avoided.

The utility model discloses an environment-friendly steel surface dephosphorization device, and relates to the technical field of dephosphorization. An environment-friendly steel surface dephosphorization device comprises a steel dephosphorization table, a guide assembly is fixedly mounted at the top of the steel dephosphorization table, a dephosphorization assembly is located on the steel dephosphorization table and comprises a plurality of cleaning cylinders, a plurality of cleaning frames, a plurality of gear rings, a plurality of gears, a dephosphorization box and a mounting box, and the dephosphorization box is fixedly connected to the top of the steel dephosphorization table; the multiple cleaning barrels are fixedly connected to the top of the steel dephosphorization table and located in the dephosphorization box, the multiple cleaning frames are rotatably connected to the interiors of the corresponding cleaning barrels, and through cooperation of the cleaning frames, the cleaning barrels, gear rings, gears and water supply pipes, the cleaning frames can rotate to clean phosphorus skin on the surfaces of steel bars; and flushing liquid can be discharged from the corresponding water outlets, so that the cleaning frame can perform 360-degree dead-corner-free phosphorus removal on the reinforcing steel bars under the cooperation of the flushing liquid, and the phosphorus removal effect on the reinforcing steel bars is further improved.

The present application relates to a kind of mine wastewater phosphorus removal treatment system and phosphorus removal method, belong to water body phosphorus removal technical field.The present application is creatively with nine water ferric nitrate and six water ferric chloride as iron source, glucose as carbon source and reducing agent, urea as alkali source, based on hydrothermal synthesis method, the particle material with four-iron oxide as core and carbon layer as shell is synthesized, then it is further oxidized by using hydrogen peroxide solution, more oxygen-containing groups are constructed, then lanthanum chloride is added for lanthanum doping, metal lanthanum modified material is obtained, finally after surface modification of polydopamine and amino silane coupling agent in turn, a kind of phosphorus removal agent is prepared, when it is used for phosphorus removal of mine wastewater in the phosphorus removal treatment system provided with electromagnet, only simple magnetic attraction treatment is needed, the separation and recovery of phosphorus removal agent can be realized, and at the same time, even in the face of strong acid mine wastewater, metal lanthanum in phosphorus removal agent still dissolves less, and the phosphorus removal effect is very good.

The invention relates to the technical field of autotrophic denitrification and dephosphorization filter materials, and discloses a composite autotrophic denitrification and dephosphorization filter material, a preparation method and an application thereof; the preparation method comprises the following steps: adding redispersible rubber powder and a slow-release adsorbent into deionized water and stirring evenly to obtain a binder; adding sodium thiosulfate, clay and sulfur into deionized water and stirring evenly, adding a binder, granulating, aging and drying at room temperature to obtain slow-release adsorption particles; adding sulphoaluminate cement, ferrous sulfate and silica fume into deionized water and stirring evenly to obtain a concrete premix; and mixing the slow-release adsorption particles and the concrete premix evenly to obtain a mixed slurry.

The invention provides a preparation method, an application and a regeneration method of a reproducible phosphorus removal fast separation ball. The preparation method of the reproducible phosphorus removal rapid separation ball comprises the following steps: S1, modifying pelelith to obtain modified pelelith; s2, soaking the modified pelelith in a rare metal solution, adjusting the pH to 10.0-11.0 and the temperature to 60-70 DEG C, stirring and soaking for 20-30 hours, washing with deionized water until the pelelith is neutral, and drying to obtain negative lanthanum pelelith; and S3, loading the lanthanum-loaded pelelith into the porous suspension ball to obtain the phosphorus removal rapid separation ball. The prepared phosphorus removal rapid separation ball can effectively remove total phosphorus in biochemical effluent, the phosphorus removal adsorption filler capable of being regenerated and desorbed can be obtained in a simple mode, the filler can be repeatedly used and is high in mechanical strength, small in abrasion and easy to operate, generated precipitates and filtrate can be utilized, and the phosphorus removal rapid separation ball has excellent economic benefits.

This application relates to the field of wastewater treatment technology, specifically disclosing a method for rapid cultivation and stable operation of aerobic granular sludge in low-concentration municipal wastewater. The method includes adding sodium acetate, potassium dihydrogen phosphate, and allyl thiourea to low-concentration municipal wastewater with COD ≤ 200 mg / L. After addition, the COD concentration of the influent increases by 100–200 mg / L, and the PO4 concentration decreases by [missing value]. 3‑ The concentration of -P is increased by 2.5–5.0 mg / L, and the concentration of ATU is increased by 5–10 mg / L. Then, activated sludge from a conventional municipal wastewater treatment plant is inoculated into the reactor at a concentration of 3000–6000 mg MLSS / L. The aerobic granular sludge is cultivated in cycles of 3–4 hours, following the sequence of influent, stirring, aeration, sedimentation, and effluent discharge. The volume exchange ratio per cycle is 33%–50%. When granulation reaches over 80%, the system enters a stable operation period. At this time, only low-concentration municipal wastewater is used as influent, with each cycle lasting 4–6 hours, and the volume exchange ratio per cycle increasing to 50%–75%. The purpose of this patent is to solve the problem of the long start-up period and difficulty in maintaining stable operation when cultivating aerobic granular sludge using low-concentration municipal wastewater.

The utility model discloses an integrated sewage treatment system relates to sewage treatment technical field, and this system includes the pretreatment unit, biochemical treatment unit, secondary treatment unit and sludge treatment unit that connect gradually, and biochemical treatment unit includes the anaerobic pool, the anoxic MBBR pool and CWSBR biological pool that connect gradually, and CWSBR biological pool includes the aerobic MBBR pool, reaction area and balance area that arrange gradually, and secondary treatment unit is used to carry out flocculation precipitation and filtration treatment to sewage, and sludge treatment unit is used to carry out centralized treatment to the sludge of each unit generation, the utility model discloses through multistage biochemical coupling and depth treatment combination, and the efficiency of denitrification and phosphorus removal and the anti -impact load capacity of a large margin are promoted, and the effluent quality is stable, and the sludge centralized disposal, and the system integration degree is high, and the land area is small, and the operation cost is low, is applicable to town sewage and industrial waste water treatment.

The invention belongs to the technical field of sewage treatment, particularly relates to an efficient integrated chemical phosphorus removal control system in an EGA intelligent tank, and provides the following scheme aiming at the problems that in the existing feeding process, granular chemicals can be caked, so that the chemical feeding is not smooth, manual feeding is not accurate enough, and waste is easily caused, the efficient integrated chemical phosphorus removal control system comprises the EGA intelligent tank, a water inlet pipe and a water outlet pipe are arranged on the two sides of the EGA intelligent groove in a penetrating mode respectively, at least two exhaust pipes are fixedly arranged on the top of the EGA intelligent groove in a penetrating mode, the tops of the two exhaust pipes are sleeved with a mounting plate, a first charging barrel is arranged on the top of the mounting plate in a penetrating mode, and the bottom of the first charging barrel communicates with the EGA intelligent groove through a liquid inlet pipe. The stirring spoon is arranged in the first charging barrel, the stirring spoon can be conveniently and additionally arranged on the EGA intelligent groove in the later period through the arrangement of the storable stirring spoon and the positioning matching of the mounting plate and the exhaust pipe, the application capability of the stirring spoon can be improved, and the stirring spoon can be automatically limited after being mounted, so that the EGA intelligent groove is convenient to mount and use.