3398 results about "Flocculation" patented technology

The invention relates to the technical field of sewage treatment, and discloses a coagulant addition control method and system in sewage treatment, and the method comprises the steps: obtaining a floc image in a flocculation basin in real time, and inputting the floc image into an alumen ustum segmentation recognition model pre-trained based on a U-Net model after generative adversarial network optimization to obtain an alumen ustum recognition result; extracting floc characteristic parameters based on the alumen ustum identification result; acquiring water quality parameters of the sewage treatment plant in real time; inputting the floc characteristic parameters and the water quality parameters into a coagulant prediction model trained based on ensemble learning to obtain predicted coagulant adding data; and controlling the operation of the coagulant dosing pump based on the predicted coagulant dosing data. According to the invention, a proper coagulant addition amount can be accurately given according to real-time water quality data in combination with floc characteristics, and the method can be combined with an operation mechanism of a coagulation process, has very strong adaptability, is helpful to realize reasonable and accurate addition of the coagulant, optimizes resource utilization, and improves the cost performance of sewage treatment.

The invention discloses an intelligent monitoring system for sewage treatment in the coal chemical industry, and relates to the technical field of sewage treatment.The intelligent monitoring system is characterized in that a water quality monitoring unit is used for collecting parameters such as COD, turbidity, pH and heavy metal ion concentration in real time, the change trend of water quality in a short time is predicted through a long-short term memory (LSTM) network, and then adding parameters of a flocculating agent are dynamically calculated; the defects of a fixed adding curve or artificial experience adjustment are overcome, so that the adding amount, the type and the speed of the flocculating agent can be adaptively adjusted to be matched with the change of sewage components; the addition optimization unit is combined with a CNN-LSTM model to analyze the rheological characteristics of the sludge, so that the addition of the flocculating agent adapts to the rheological change of the sludge, the flocculation effect is optimized, and the sludge settling performance is improved; meanwhile, the stirring control unit adjusts the stirring strength and time in real time based on ultrasonic online monitoring data, so that the flocculating agent is fully dispersed, the particle distribution state is optimized, the flocculation reaction is more uniform, and the subsequent precipitation separation efficiency is improved.

Disclosed in the present invention are a flocculant addition amount real-time optimization method and system based on multi-flocculation jar testing. The method comprises: obtaining an addition amount of a flocculant and a coagulant aid during first operation; on the basis of a flocculant basic addition amount in an r-th round of flocculation jar testing, respectively obtaining three sets of floc image and water quality index data corresponding to three intelligent JarTest modules which carry out flocculation testing at the same time in the r-th round of flocculation jar testing; respectively inputting the three sets of floc image and water quality index data into a pre-trained deep learning model, to correspondingly obtain a supernatant turbidity predicted value Td1(r), a supernatant turbidity predicted value Td2(r), and a supernatant turbidity predicted value Td3(r) in the r-th round of flocculation jar testing; and on the basis of the supernatant turbidity predicted value Td1(r), the supernatant turbidity predicted value Td2(r), and the supernatant turbidity predicted value Td3(r), obtaining a new flocculant actual addition amount, and taking the new flocculant actual addition amount as a flocculant basic addition amount in the (r+1)-th round. The present invention can achieve real-time adjustment and optimization of the flocculant addition amount.

The invention provides a zero-discharge treatment process for recycling production wastewater, and relates to the technical field of water treatment and recycling, and the zero-discharge treatment process comprises the following steps: S1, oxidizing and degrading COD through ozone and a Fenton reagent, and generating a flocculatable intermediate; s2, intercepting suspended matters by using a gradient aperture filter bed in a grading manner, and monitoring a dynamic membrane resistance coefficient delta Rm in real time to automatically trigger backwashing; s3, coupling an ultrafiltration reverse osmosis membrane to realize that the organic matter rejection rate eta is greater than or equal to 98%, and synchronously regulating and controlling flux and operation pressure by an online spectrometry; s4, regulating and controlling the current density by adopting a rotational flow electric flocculation reactor for directional crystallization to produce industrial salt with Cl <-> less than or equal to 50mg / L; and S5, based on the total dissolved solid recovery rate TR and the comprehensive energy consumption, establishing a multi-target optimization model for real-time parameter adjustment. According to the method, a membrane pollution early warning and backwashing dynamic response mechanism is constructed through cross-scale cooperative regulation and control of delta Rm and the retention rate eta, and a catalytic oxidation effect strengthening and electric crystallization parameter self-tuning technology is combined, so that the problem of cooperative optimization of high-salinity wastewater salt gradient separation and pollutant deep removal is solved.

The invention discloses a dosing system for pre-oxidation enhanced coagulation in a water plant and an intelligent regulation and control method, and relates to the technical field of pre-oxidation enhanced coagulation water treatment. The system comprises a raw water pump, a mixing tank, a tubular static mixer, a flocculation tank, a sedimentation tank, an industrial personal computer and multiple online detection instruments which are sequentially connected in series, so as to monitor the flow, conductivity, pH value, temperature, turbidity, ultraviolet absorbance and organic matter concentration of raw water. Key water quality indexes are monitored in real time through data collection and a pre-oxidation enhanced coagulation regulation and control system based on machine learning of an industrial personal computer, and intelligent and accurate prediction of the dosage of oxidants (potassium permanganate, permanganate composite agents and potassium ferrate) and coagulants is achieved; the effluent turbidity, the effluent ultraviolet absorbance and the effluent organic matter concentration of the sedimentation tank are fed back in real time, the adding amount of the oxidizing agent and the coagulant is dynamically adjusted through a regulation and control algorithm, the effluent quality is guaranteed, and medicine consumption is reduced.

The invention belongs to the technical field of water treatment, and particularly relates to a whole-process three-stage linkage control intelligent flocculation dosing method, which comprises the following steps: collection: collecting water quality and water quantity parameters of inlet water and outlet water in real time in the water treatment process; collecting a floc image in the reaction process, analyzing the particle size distribution and the breakage rate of the floc image, and collecting a torque parameter of a stirring device at the same time; according to the invention, multiple types of sensors are deployed in the water inlet area of the flocculation tank, the reaction area and the water outlet area of the sedimentation tank, water quality, water quantity and reaction process parameters are collected in real time, and edge calculation and cloud optimization technologies are combined, so that full-flow intelligent control from agent pre-feeding, reaction process regulation and control to water outlet effect refinement is realized; the method is suitable for scenes such as municipal sewage treatment plants and industrial wastewater treatment stations requiring precise control of flocculant addition, and is especially suitable for water treatment processes with frequent water quality fluctuation and sensitive agent cost, so that the treatment efficiency can be remarkably improved, and the operation cost can be reduced.

The utility model relates to the technical field of industrial sewage treatment, in particular to industrial sewage purification equipment for environmental protection engineering. The problems that in the flocculant adding operation process, the adding amount of a flocculant is difficult to control, and the overall sewage treatment efficiency of equipment is affected are solved. The device comprises a treatment tank and a drainage pipe fixedly connected to the side face of the treatment tank. The device further comprises a flocculating agent feeding assembly and a stirring assembly. The propeller can automatically drive the oval block to rotate, and then the baffle is driven to intermittently block the discharging opening of the flocculating agent adding box, so that the flocculating agent adding box can automatically and quantitatively add a flocculating agent into the water inlet pipe, and flocculates in the treatment tank can be conveniently discharged through the slag discharging pipe; sewage in the stirring barrel is stirred through the stirring rod, so that the sewage and a flocculating agent are fully mixed, the sewage purification effect is improved, and meanwhile, a scraping plate scrapes away impurity attachments on the inner wall of the stirring barrel.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a phenolic resin industrial wastewater treatment process which comprises the following steps: S1, pretreatment: introducing collected industrial wastewater into a grating tank, and then adding a flocculant into coagulating sedimentation equipment to promote the coagulation of suspended solids so as to form particulate matters easy to precipitate for precipitation; s2, performing multi-stage biological enhancement treatment; s3, membrane separation deep treatment; and S4, recycling and discharging. Wherein the coagulating sedimentation equipment in the step S1 comprises a flocculation basin and a sedimentation basin body, a plurality of inclined plate bodies are arranged in the sedimentation basin body, the plurality of inclined plate bodies are movably mounted in the sedimentation basin body through a swing adjusting mechanism, a pollution discharge basin is arranged at the bottom of the sedimentation basin body, an overflow weir is arranged in the sedimentation basin body, and the overflow weir is arranged in the sedimentation basin body. The overflow weir is located above the inclined plate body, a drainage groove is formed in one side of the sedimentation tank body, and the drainage groove is communicated with the overflow weir; according to the invention, the precipitation treatment effect on colloids and flocculated suspended solids in wastewater can be improved.

The invention discloses a process and system for recovering phosphorus and fluorine from ardealite leachate, which comprises the following steps: feeding the ardealite leachate into an induced crystallization reactor for induced crystallization, discharging generated large-particle fluorapatite crystals from a crystal discharge port at the bottom of the induced crystallization reactor, and collecting and recycling; aluminum hydroxide flocs and fine-particle fluorapatite crystals enter a cyclone separator along with the effluent, the fine-particle fluorapatite crystals are separated and then flow back to the induced crystallization reactor, the aluminum hydroxide flocs form precipitates in the flocculation sedimentation tank through flocculation to be removed, and the effluent of the flocculation sedimentation tank enters a multi-stage treatment system. According to the method disclosed by the invention, fluorine and phosphorus in the phosphogypsum leachate are recovered together, the recovered fluorapatite finished product is high in purity and can be recycled, and the amount of chemical sludge is also greatly reduced, so that the treatment cost of the sludge is reduced.

The invention discloses an intelligent wastewater treatment system based on Internet of Things, and relates to the technical field of wastewater treatment, and the system comprises the following modules: a flocculation control module for obtaining the content value of to-be-treated wastewater, setting the stirring speed and the stirring time, obtaining the stirring rate through the product of the stirring speed and the stirring time, and controlling the flocculation control module; according to the scheme, suspended matters in the added wastewater are detected through the flocculation control module, so that the stirring speed, the stirring time and the adding amount of a flocculating agent are set according to the condition of the acrylic emulsion wastewater, and a proper flocculating agent is selected for flocculation according to the pH value of the wastewater, so that the situation that the flocculation effect of the flocculating agent is influenced by the pH value of the wastewater is avoided; according to the invention, the flocculating agent is added into the wastewater, so that the flocculating agent can better agglomerate and gather suspended matters, the addition amount of the flocculating agent can be automatically and intelligently set according to the actual condition of the wastewater, waste caused by excessive addition of the flocculating agent can be avoided, and influence on the flocculation effect caused by too little addition of the flocculating agent can be avoided.

The invention discloses a flocculation treatment device and method for removing high turbidity of a water sample. The method comprises the following steps: monitoring an inflow turbidity parameter in real time, continuously collecting original optical characteristic data of water through an optical sensor array, and calculating a turbidity fluctuation rate parameter after noise reduction treatment; carrying out graded rotational flow mixing treatment, forming a pressure gradient through three stages of tapered rotational flow pipes in sequence, activating an ultrasonic frequency field, and synchronously adding main and auxiliary flocculants; the method comprises the following steps: introducing a water sample into a multi-stage gradient flocculation reaction zone, and sequentially executing turbulent flow enhanced flocculation, slow stirring flocculation and pulsed electric field assisted flocculation to form a floc structure with different particle size distribution; running parameters of a sedimentation module are adjusted according to real-time effluent turbidity feedback, and the inclination angle of an inclined plate assembly and the opening degree of a mud discharging valve are dynamically adjusted; a parameter set is updated through a prediction model based on periodically collected system operation data, a closed-loop optimization control strategy is formed, the adaptability to extreme turbidity is enhanced, the solid-liquid separation efficiency is improved, the overall energy consumption is reduced, and the efficient and stable requirements of emergency treatment are met.

The invention discloses a low-cost treatment method for high-manganese-content difficult-to-treat mine acid wastewater, which is implemented by adopting a graded neutralization treatment process and comprises the following steps: regulating the pH value of the wastewater to be 5-6 in a first-stage neutralization reaction, feeding the wastewater into a first-stage flocculation reaction tank, and agglomerating hydroxide particles to form large flocculate; feeding the wastewater subjected to the primary flocculation reaction into a primary sedimentation tank to precipitate sludge in the wastewater, feeding discharged supernate into a secondary neutralization tank, feeding the discharged supernate into a secondary flocculation reaction tank, feeding the wastewater subjected to the secondary flocculation reaction into a secondary sedimentation tank to precipitate sludge in the wastewater, and taking supernate of the secondary sedimentation tank as qualified effluent; the method disclosed by the invention is simple in process, high in heavy metal removal rate, relatively small in agent use amount and small in sludge generation amount, can overcome the defects that manganese in the effluent of the mine acid wastewater is difficult to reach the standard, the effluent needs acid callback, the agent use amount is large and the sludge generation amount is large, and can efficiently ensure that the effluent of a mine acid wastewater treatment facility stably reaches the standard in an energy-saving manner.

The invention discloses a mud flocculation filter-press dehydration treatment device and a dehydration method, the treatment device is formed by sequentially connecting a vibration screening device, a flocculation stirring cavity and a filter-press dehydration device, and the flocculation stirring cavity is connected with a flocculant grouting device through a grouting pipe; according to the dehydration method, the coagulation filter-press dehydration treatment device is adopted, the slurry can be subjected to suction filtration and screening, meanwhile, the requirement of a flocculant is effectively controlled, the stirring speed is controlled to achieve sufficient stirring, and under the action of a water suction pump, the slurry subjected to sufficient flocculation and stirring can be conveyed to a filter-press integrated space to be subjected to efficient filter-press dehydration to form a mud cake to be conveyed out of a site; the method has the advantages of high efficiency, convenience, high controllability and the like.

The invention provides a water quality treatment device control method, system and equipment and a storage medium, and the method comprises the following steps: carrying out data acquisition on a water quality treatment device based on a water quality treatment duration required by a flocculation process to obtain multiple groups of target water inlet data and multiple flocculant addition amounts from a first moment to a second moment, the duration from the first moment to the second moment is the water quality treatment duration; on the basis of the multiple sets of target water inlet data and the multiple flocculating agent adding amounts, the turbidity prediction model is used for conducting effluent turbidity prediction, and the predicted effluent turbidity is obtained; and based on the predicted effluent turbidity and the actual effluent turbidity of the water quality treatment device at the second moment, controlling the water quality treatment device to carry out feedback regulation on the adding amount of the flocculating agent. According to the embodiment of the invention, the accuracy and the stability of predicting the effluent turbidity are improved, the control accuracy of the adding amount of the flocculating agent is improved, the actual effluent turbidity can be maintained near the required effluent turbidity, and the effluent quality stability is improved.

The invention relates to the technical field of printing and dyeing wastewater treatment equipment, and discloses an improved textile printing and dyeing wastewater treatment device and a use method thereof.The improved textile printing and dyeing wastewater treatment device comprises an equipment shell, and a plurality of supporting legs are fixedly connected to the bottom of the equipment shell. According to the textile wastewater treatment device, a second gear rotates to drive a plurality of second auxiliary rotating shafts on a conveying rotating shaft to rotate, the second auxiliary rotating shafts rotate to drive a transmission filter screen to rotate, and meanwhile, a stirring rod rotates to drive wastewater in an inner cylinder to rotate along the inner wall of the inner cylinder; flocculation groups in the wastewater are attached to the surface of the transmission filter screen, and at the moment, the transmission filter screen rotates to convey the flocculation groups in the inner cylinder into the flocculation cavity, so that on one hand, a large number of flocculation groups in the inner cylinder can be reduced in time, and on the other hand, the flocculation groups which are flocculated into clusters can be transferred into the flocculation cavity; therefore, the situation that the stirring force of the stirring rod is too strong, flocculation groups are broken, and impurity separation is not facilitated is prevented.

The invention discloses a movable geotextile pipe bag mud dewatering and curing treatment method, and relates to the technical field of sludge treatment.According to the movable geotextile pipe bag mud dewatering and curing treatment method, the adding amount of a flocculating agent is dynamically adjusted according to mud data monitored in real time, and the situation of agent waste or insufficient drug effect caused by a traditional fixed-proportion agent adding mode is avoided; a fuzzy control algorithm is adopted to dynamically adapt to the component change of the slurry, the cost of excessive use of chemicals is reduced, a chemical adding strategy is automatically adjusted, the slurry treatment effect is more stable, meanwhile, a multi-stage chemical adding mode is adopted, a flocculating agent is evenly distributed in the slurry, the flocculating agent can cover large particles and fine particles, and the treatment efficiency is improved. The problem of non-uniform flocculation caused by a single dosing point is improved, the overall efficiency of slurry dehydration is effectively improved by treating slurry with different particle sizes at different stages, and the stirring strength is dynamically adjusted based on slurry flow and particle size parameters, so that a flocculating agent and particles in the slurry are fully mixed, and the flocculation effect is improved.

The invention relates to the technical field of cement materials, in particular to a red-mud-containing steel slag composite cementing material and a preparation method thereof.The method comprises the steps that red mud, slag, steel slag, desulfurized gypsum and sulphoaluminate cement clinker are subjected to dry mixing to obtain an initial mixture; determining whether the excitation capability of the potential hydration activity reaches the standard or not based on the alkaline matching index, and adjusting the weight part of the sulphoaluminate cement clinker; adding a composite exciting agent to obtain activated slurry; determining whether the dispersion effect of the flocculation structure of the initial mixture is qualified or not based on the dispersion index of the flocculation structure, and adjusting the ball milling rotating speed; adding a polymer emulsion to obtain an initial composite cementing material; determining whether the synergistic enhancement effect of the polymer emulsion and the activated slurry is qualified or not based on the synergistic enhancement index, and adjusting the dripping rate of the polymer emulsion; the steel slag composite cementing material containing the red mud is obtained. The preparation stability of the red mud-containing steel slag composite cementing material is improved.

The invention relates to a preparation method and application of a mine water flocculation agent with an adsorption function. The mine water flocculation agent is prepared from the following raw materials: a mineral material, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. The preparation method comprises the following steps: carrying out heat treatment on a mineral material, then adding water and chitosan, then adding silicate, reacting to generate polysilicic acid, grafting the polysilicic acid on chitosan macromolecules, then adding aluminum chloride salt and ferric chloride salt, reacting, finally adding polyacrylamide, and aging to obtain the composite material. The mine water flocculating agent provided by the invention can synchronously remove suspended matters, fluorides and COD (Chemical Oxygen Demand), and has the advantages of low dosage, short reaction time and high settling speed.

The invention relates to the technical field of flocculants, in particular to a composite flocculant containing a cationic etherifying agent and a preparation method of the composite flocculant, and the composite flocculant is prepared from the following raw materials in parts by weight: 15-20 parts of carboxymethyl guar gum, 12-15 parts of cationic konjac glucomannan, 1.2-1.5 parts of the cationic etherifying agent, 1.8-2.2 parts of a magnetic polysilicate metal salt flocculant and 0.2-0.3 part of a preservative. According to the present invention, by compounding the flocculant, the flocculated floc has magnetism and can be recovered and repeatedly utilized, and the photoresponse azobenzene structure is grafted in the cationic konjac glucomannan, such that the controllable pollutant aggregation and separation can be achieved, and the good flocculation performance can be maintained after the composite flocculant is repeatedly recovered and repeatedly utilized.

The present invention discloses a high-drying high-pressure belt-type sludge dewatering machine, comprising a flocculation tank, a concentrated primary filter belt device, a skeleton agent automatic feeding device, a modifier feeding device, a mixing device, a mud homogenizing device, and a high-pressure filter belt device; the mixing device comprises a mixing bin, a mixing and stirring mechanism and a modifier spraying assembly arranged in the mixing bin, the sludge sent out of the outlet of the sludge primary filter belt assembly is fed into the sludge input port through a sludge input pipe, and the skeleton agent automatic feeding device inputs the skeleton agent into the mixing bin through the sludge input port. The sludge dewatering machine of the present invention greatly reduces the moisture content of the sludge output, and can achieve full-automatic continuous operation, integrating all the processing processes into one device, greatly reducing the occupied space, and simplifying the operation process.

The invention relates to the field of sewage treatment, in particular to a sewage treatment dosing system suitable for a sewage flocculation separation sedimentation tank, and aims to solve the problem that the feeding amount of a flocculant cannot be automatically adjusted according to the condition of sewage needing to be treated when the flocculant is fed. According to the invention, sewage needing to be treated and external environment interference factors of sewage treatment are collected, the flocculant addition amount is generated through a dynamic model simulation mode, then a sewage flocculation result is detected, whether the flocculant addition amount is enough is judged, insufficient addition of the flocculant is avoided, and the sewage treatment efficiency is improved. The method automatically corrects and adjusts the simulation model of the flocculant addition amount, monitors the sewage flocculation process, analyzes whether the addition of the sewage flocculant is excessive or not, avoids excessive addition of the flocculant, realizes automatic addition of a proper amount of the flocculant according to the sewage treatment requirements, and improves the sewage treatment efficiency. And the purpose of automatically optimizing the simulation accuracy of the putting amount of the flocculating agent is achieved, and the intelligent degree in the sewage treatment dosing process is improved.

The invention discloses a micro-nano air flotation coupling critical micro-flocculation phosphorus removal control method, which relates to the technical field of water treatment, and comprises the following steps: when the total phosphorus concentration is lower than a preset concentration threshold value, determining the proportion of non-target particles based on the water turbidity and particle spectrum distribution; adding a flocculating agent according to a preset critical dosage to generate target phosphorus floc, and synchronously forming a primary flocculation phase which can be distinguished from non-target particles; applying an interfacial activity regulation factor to the micro-nano bubbles based on the primary flocculation phase, and performing selective regulation; forming a bubble-phosphorus floc complex based on a selective regulation effect; the bubble-phosphorus floc complex is separated and removed in an air flotation mode, the competition intensity history of non-target particles is recorded, and a competition memory curve is formed. According to the method, interfacial activity regulation factors are applied to the surfaces of the micro-nano bubbles, so that the micro-nano bubbles can preferentially and selectively adsorb target phosphorus floc, and efficient removal of low-concentration total phosphorus is realized.

The invention discloses an in-situ treatment system for enhanced purification of overflow pollution of a river inlet discharge port, and belongs to the technical field of water environment treatment. The in-situ treatment system comprises a magnetic flocculation precipitation unit and an ecological slope protection purification unit. Overflow sewage of a river channel discharge port is firstly intercepted to the magnetic flocculation sedimentation unit by the sewage lifting pump, and in the process, the overflow sewage is firstly preliminarily mixed with a composite flocculant polyferric silicate sulfate in the sewage inlet pipe, and then enters the magnetic seed mixing reaction tank to be further fully and uniformly stirred and mixed with magnetic seeds. According to the invention, an integrated overflow sewage pretreatment device and an ecological slope protection deep purification filter tank are established near a river inlet discharge port side slope by utilizing a slope top and a large-area river side slope. And under the conditions of low investment and low operation cost, the problem that the river inlet discharge port overflow pollution treatment generally lacks a site is solved according to local conditions.

The invention discloses a method for cooperatively regulating and controlling the self-dilution water quantity of a thickener through a rotary mixing drum, relates to the technical field of thickener feeding wells and dilution modes thereof, and aims at solving the problems that the addition quantity of dilution water in the feeding wells is reasonably controlled, the sedimentation effect is poor due to unreasonable flocculation concentration and the like. The method comprises the following steps: S1, setting program parameters of a control system according to design indexes of a specific thickener; s2, when the thickener runs, the control system collects the concentration of the slurry entering the thickener in real time by controlling the ore pulp concentration meter, and further collects the flow of the slurry entering the thickener in real time through the ore pulp flow meter; the adaptability of the thickener in the aspects of feeding concentration and flow fluctuation is improved, the defect that an original fixed dilution opening cannot adjust the dilution water amount is overcome, the flocculation effect of a feeding well is improved, flocculant consumption is reduced, and the fractal dimension of flocs is improved, so that the comprehensive benefits of the thickener are improved.

The invention discloses a system and a method for classified sewage treatment, and belongs to the technical field of environmental engineering and water treatment. The system comprises the following components: an intelligent water quality detection module, which is used for real-time and accurate monitoring of COD, BOD, ammonia nitrogen, total phosphorus, suspended matter concentration and heavy metal content; the sectional bioreactor realizes deep removal of nitrogen and phosphorus and efficient biological treatment by flexibly adjusting reaction conditions of each section; the intelligent flocculation control module is used for automatically and accurately adjusting the adding amount of a flocculating agent, and is combined with integrated operation of efficient inclined tube precipitation and sludge concentration, so that the water quality of discharged water is stable, and the medicament consumption is reduced; the ultrafiltration membrane bioreactor effectively removes residual suspended matters and colloids, and ensures that the effluent stably reaches the standard for a long time through the synergistic effect of catalytic ozonation; and the sludge treatment module is used for realizing collaborative optimization management of sludge reduction, recycling and energy recycling.

The invention discloses a process and equipment for synthesizing fluorapatite from wastewater, the equipment comprises a blending tank, a dispensing tank, a crystallization fluidized bed reactor, a reaction tank, a coagulation tank, a flocculation tank, a sedimentation tank, a pH detection device, a lift pump and a control system, fluorine-containing sewage and phosphorus-containing sewage are mixed in the blending tank, so that the molar ratio of fluorine to phosphorus is 0.34-0.4; the method comprises the following steps: adding fluorapatite into a reaction tank, adjusting the pH value to 7.5-8.5, pumping the fluorapatite and lime slurry into a crystallization fluidized bed reactor according to a calcium-phosphorus molar ratio of (3-3.5): 1, carrying out a crystallization reaction, naturally airing the generated fluorapatite crystals, carrying out a reaction on crystallization treatment water and the lime slurry in the reaction tank to remove fluorine and phosphorus, carrying out coagulation, flocculation and precipitation treatment, and discharging the effluent after reaching the standard. The high-quality fluorapatite product is prepared from the fluorine-containing sewage and the phosphorus-containing sewage, so that the preparation cost is low, and resourceful treatment of the fluorine-containing sewage and the phosphorus-containing sewage is realized.

The invention provides an environment-friendly fabric printing and dyeing wastewater treatment system and method, and belongs to the technical field of wastewater treatment. An environment-friendly fabric printing and dyeing wastewater treatment system at least comprises a water storage tank, two flocculation tanks, two sedimentation tanks, a transition tank, an oxidation tank, a secondary sedimentation tank, a BAF tank, a disinfection tank and a discharge tank which are connected in sequence, the two flocculation tanks are connected to the water storage tank at the same time, the two sedimentation tanks are connected to the two flocculation tanks in a one-to-one correspondence mode, and the two sedimentation tanks are connected to the BAF tank in a one-to-one correspondence mode. The two sedimentation tanks are connected to the transition tank at the same time; adding a flocculating agent and magnetic powder into the flocculation basin at the same time; each sedimentation tank is internally provided with a treatment mechanism for accelerating sedimentation of magnetic flocs and rapidly removing suspensions, each sedimentation tank is internally provided with a water outlet assembly capable of being adjusted in height, and the water storage area of the transition tank is lower than the water outlet assembly. The sewage treatment device has the advantage of improving the sewage treatment efficiency.

The invention discloses a concrete polycarboxylic acid water reducing agent with high slump loss resistance and flocculation resistance and a preparation method of the concrete polycarboxylic acid water reducing agent, and belongs to the technical field of concrete admixtures. The water reducing agent is prepared from the following raw materials in parts by weight: 45 to 55 parts of isopentenyl polyoxyethylene ether, 3 to 8 parts of methacrylic acid phosphate, 8 to 12 parts of hydroxyethyl acrylate, 4 to 7 parts of N-isopropylacrylamide, 10 to 15 parts of auxiliary monomer, 8 to 12 parts of initiator and 0.3 to 0.6 part of chain transfer agent. And the technical problems that the fluidity of the concrete is reduced and the slump retaining effect is poor due to the fact that the temperature of the concrete is increased in the stirring process are solved.

The invention discloses a composite polyacrylamide flocculant based on a nano core-shell structure as well as a preparation method and application of the composite polyacrylamide flocculant. The composite polyacrylamide flocculant is a core-shell structure composite material which takes inorganic nanoparticles grafted with carbon-carbon double bonds on the surface as a core and takes a polyacrylamide copolymer as a shell; the polyacrylamide copolymer is prepared from the following components in parts by mass: 70 to 90 parts of acrylamide, 10 to 30 parts of functional monomer and 0.1 to 1.0 part of cross-linking agent. The basic conception of the flocculating agent provided by the invention is that the structural design of inorganic nano core-organic polymer shell is adopted, PAM molecular chains firmly grow on the surfaces of nano particles in a chemical grafting manner, high dispersion and functional synergy of nano units are realized, and the obtained product has the characteristics of high flocculation speed, dense floc, high removal efficiency and the like, and has a wide application prospect. The method is especially suitable for deep treatment of difficult-to-treat industrial wastewater such as oil-containing wastewater, dye wastewater and heavy metal wastewater.

The invention discloses a high-pressure belt conveyor low-cost sludge dewatering technology, and relates to the technical field of sludge dewatering, the technology comprises the following steps: S1, in a pretreatment stage, adding a ferric chloride agent and destroying a sludge colloid structure; s2, in the conditioning stage, lime powder is added to adjust the pH value, and a porous skeleton structure is constructed; s3, adding a polyacrylamide medicament in a flocculation stage to form a compact floc; s4, a high-pressure belt filter press is used for mechanical dehydration in the dehydration stage; s5, recovering the filtrate for redissolving the medicament; s6, performing dynamic linkage optimization of chemical dosing and filter pressing parameters through a dynamic chemical dosing algorithm of the control system; the dosage of chemicals is effectively reduced, the sludge dewatering effect is improved, the sludge dewatering treatment cost is reduced, and the cyclic utilization of resources is realized; the technical problems that an existing sludge dewatering technology is too high in agent cost, low in agent matching and combination reliability and insufficient in technology adaptability are solved.