24results about How to "Reduce COD" patented technology

The invention provides a method, device and system for sequentially coding device addresses, equipment and a medium, and belongs to the technical field of batteries. The method comprises the steps of obtaining a state indication code of an nth sub-device in response to connection of the nth sub-device and a power supply; the state indication code comprises a first indication code for indicating that the sub-device does not complete coding and a second indication code for indicating that the sub-device completes coding; in response to the state indication code being a first indication code, obtaining a communication message received by the nth sub-device; the communication message is sent by the coded sub-equipment; determining address information of the nth sub-device based on the communication message received by the nth sub-device; setting the state indication code of the nth sub-device as a second indication code; and sending a communication message and a control signal for indicating the power switch of the nth sub-equipment to be closed. According to the method for sequentially coding the device addresses, the number of hardware needed by coding can be reduced.

The invention relates to the technical field of industrial wastewater treatment, and discloses a wastewater treatment method in a carton printing production process, which comprises the following steps of: 1, filtering carton printing wastewater through a coarse grid and a fine grid in sequence to further remove particle suspended matters; 2, the filtered wastewater enters a regulating tank, the pH value of the wastewater is monitored through an on-line pH sensor, NaOH or H2SO4 is accurately added through an automatic control system according to the monitoring result, the pH value is regulated to 6-8, and the retention time of the wastewater in the regulating tank is controlled to be 6-8 h. Through multi-stage grid filtration and micro-electrolysis pretreatment, suspended particles and macromolecular organic matters in the wastewater are effectively removed, the load of a subsequent unit is reduced, meanwhile, the biodegradability of the wastewater is improved, favorable conditions are provided for subsequent biological treatment, the overall treatment efficiency is remarkably improved, and the risks of system blockage and equipment maintenance are reduced.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a high-performance catalyst and a method for recovering anhydrous sodium sulphate high-salt water by using the same. The preparation method of the high-performance catalyst comprises the following steps: (1) dissolving a magnesium salt, an iron salt, a lanthanum salt and a cerium salt in water, and ultrasonically dispersing uniformly to obtain an impregnation liquid; (2) placing a gamma-alumina carrier in the impregnation liquid, uniformly stirring, and standing to obtain a precursor solution; and (3) drying the precursor solution, and roasting the precursor solution in a muffle furnace to obtain the high-performance catalyst. Active components are loaded on the surface and the interior of a gamma-aluminum oxide solid-phase carrier material in the form of a salt solution through impregnation, and the loaded target elements form the catalyst with catalytic activity through the processes of roasting activation and the like. The problem that a heterogeneous ozone catalyst prepared from a single metal oxide is low in catalytic efficiency in actual wastewater treatment is solved.

This disclosure provides a cross-channel distributed video encoding and decoding method and system based on multidimensional attention, which can be applied to the field of video encoding and decoding technology. The method includes: acquiring a group of video images to be transmitted, the group of video images including a first key reference frame, a second key reference frame, and at least one intermediate video frame; encoding the first key reference frame and the second key reference frame into first encoded data and second encoded data, respectively; encoding each intermediate video frame into third encoded data based on a frame encoder; extracting multi-scale features from each third encoded data based on a multidimensional attention mechanism; processing the multi-scale features into fourth encoded data based on a multi-channel feature extraction mechanism; processing at least one fourth encoded data into a first bitstream; and converting the first encoded data and the second encoded data into a second bitstream, so as to transmit the video image group to the decoder via the first bitstream and the second bitstream.

Belonging to the technical field of underground water treatment, the invention provides an underground water treatment system, which comprises a raw water tank, a security filter, an ultrafiltration membrane assembly, an intermediate water tank, an ozone treatment device and a water production tank. An outlet of the raw water tank is communicated with an inlet of the main pipeline, and an outlet end of the main pipeline is communicated with the water producing tank; a security filter, an ultrafiltration membrane assembly, a middle water tank and an ozone treatment device are sequentially communicated from the inlet end to the outlet end of the main pipeline. Polluted groundwater is fed into the security filter through the high-pressure pump, suspended particles in the water are preliminarily removed, then the water enters the ultrafiltration membrane assembly for secondary filtration, macromolecular organic pollutants such as petroleum are further removed, the chemical oxygen demand of the polluted groundwater is greatly reduced, and the water subjected to secondary filtration flows into the middle water tank to be recycled. And further removing soluble organic matters in subsequent oxidation treatment.

This utility model relates to a vacuum low-temperature evaporation wastewater treatment system, including a chassis and a distillation kettle and a vacuum cooling device installed inside the chassis; wherein, the distillation kettle is provided with a wastewater inlet, a steam outlet and a concentrate outlet, the wastewater inlet is equipped with a liquid inlet valve and the concentrate outlet is equipped with a drain valve; a float level gauge is installed on the distillation kettle, the float level gauge is used to control the opening and closing of the liquid inlet valve; the vacuum cooling device is in fluid communication with the steam outlet, and is used to evacuate the distillation kettle and cool the steam into water; wherein, the vacuum low-temperature evaporation wastewater treatment system further includes a COD reduction and deodorization device, the COD reduction and deodorization device is used to treat the distilled water to reduce COD and deodorize it.

The application discloses a synthesis method of dextrophenethylsulfonic acid D-p-hydroxyphenylglycine complex salt, which utilizes the inactive enantiomer levorotatory phenethylsulfonic acid to prepare the dextrophenethylsulfonic acid D-p-hydroxyphenylglycine complex salt through racemization, recycles and utilizes the originally discarded inactive enantiomer levorotatory phenethylsulfonic acid in the mother liquor, greatly reduces the cost of the dextrophenethylsulfonic acid D-p-hydroxyphenylglycine complex salt, and greatly reduces COD in the mother liquor, thereby reducing environmental protection treatment pressure.

The utility model discloses an assembly type small-sized flowing riverway ecological auxiliary device, which comprises a water baffle, two water baffle clamping grooves and an unpowered mixer, the two water baffle clamping grooves are respectively arranged on riverway revetments on two sides, the water baffle is arranged between the two water baffle clamping grooves, a plurality of water passing holes are arranged on the water baffle, and the unpowered mixer is arranged on the water baffle. Each water passing hole is provided with an unpowered mixer, each unpowered mixer comprises a conical pipe, a fixed edge is arranged on the outer circle of the large-diameter end of each conical pipe, the conical pipes are installed on the water baffles through the fixed edges, feeding ports of the conical pipes correspond to the water passing holes of the water baffles, and the feeding ports of the conical pipes correspond to the water passing holes of the water baffles. And a dosing device is mounted at a feeding hole in the large-caliber end of the conical pipe. The device has the advantages of convenience in assembly and disassembly, energy conservation, good treatment effect, safety and environment friendliness.

The application discloses an electrophoretic wastewater pretreatment method, which comprises the following steps: performing electrochemical treatment on electrophoretic wastewater in an electrochemical reactor to obtain treated electrophoretic wastewater. The material of an anode plate in the electrochemical reactor comprises at least one of ruthenium iridium titanium, platinum gold titanium, iridium tantalum titanium, diamond, 316L stainless steel and a titanium plate; and the material of a cathode plate in the electrochemical reactor comprises at least one of 316L stainless steel, foamed nickel, a titanium mesh and a titanium plate. The electrophoretic wastewater pretreatment method reduces the sludge production amount, has no secondary pollution, and has high and stable wastewater treatment effect, thereby effectively reducing the treatment cost of the electrophoretic wastewater.

This invention provides a method for treating farmland drainage using an aerated ecological filter, relating to the field of wastewater treatment technology. The aerated ecological filter comprises, from top to bottom, a coarse-particle packing layer, an aeration device, a filter screen, a Fe-BC@CS-MOF porous material layer, another filter screen, and a fine-particle packing layer. Pseudomonas taiwanensis and Pseudomonas chengduensis are introduced into the aerated ecological filter for cultivation and acclimatization, which converts nitrate nitrogen in farmland drainage into ammonia nitrogen and degrades organic pollutants, reducing COD in the water. The Fe-BC@CS-MOF porous material layer can adsorb ammonia nitrogen, phosphate, and heavy metals. Ammonia nitrogen and phosphate are desorbed through acid leaching, while heavy metals are retained in the porous material, allowing for the recovery and reuse of ammonia nitrogen and phosphate.

The utility model provides a sewage treatment system which comprises a pretreatment tank group, a biochemical tank group, a sedimentation tank group and a disinfection tank group which are communicated in sequence, the biochemical tank group comprises a hydrolysis acidification tank, an anaerobic tank, a front anoxic tank, a front aerobic tank, a rear anoxic tank and a rear aerobic tank which are communicated in sequence, the hydrolysis acidification tank is communicated with the pretreatment tank group, and the front anoxic tank is communicated with the front aerobic tank. And the rear aerobic tank is communicated with the sedimentation tank group. The sewage treatment device can be used for effectively treating organic matters in sewage and reducing the ammonia nitrogen content in the sewage.

The invention relates to the technical field of pressurized water reactor nuclear power station primary loop chemical decontamination waste water treatment, in particular to a pressurized water reactor nuclear power station decontamination waste liquid treatment system and method. The system adopts a combined process of pre-oxidation and electron beam irradiation, can effectively remove organic matters in the organic waste liquid, greatly improves the degradation efficiency of the waste liquid, reduces the chemical oxygen demand, and ensures that the treated waste liquid meets the waste liquid discharge standard of a nuclear power station. And secondly, the heat exchange tube structure arranged in the reactor can quickly and uniformly increase the temperature of the waste liquid through an external high-temperature molten salt heating mode, so that the requirement of the oxidation reaction on the temperature is met, and the treatment efficiency is improved. Through automatic control and intelligent feedback adjustment, the adding amount of the oxidizing agent, the pH value of the waste liquid and the treatment conditions can be accurately controlled, errors caused by manual operation are remarkably reduced, and the stability and safety of system operation are improved.

The utility model provides a coking ammonia evaporation wastewater treatment device. The coking ammonia evaporation wastewater treatment device includes: the adjusting pool, the cooling water tank of fixed installation in the adjusting pool bottom, the frame of fixed installation in the adjusting pool top, the oxygen pool in the adjusting pool one side, the anaerobic tank in the oxygen pool one side, install the aeration mechanism for the wastewater in period in the oxygen pool and carry out aeration, install the circulating cooling mechanism for the coking ammonia evaporation wastewater and carry out cooling on the adjusting pool, install the oil removal mechanism for the coking ammonia evaporation wastewater and carry out oil removal on the frame. The coking ammonia evaporation wastewater treatment device provided by the utility model has the advantages of oil removal and cooling function to the coking ammonia evaporation wastewater, relatively convenient operation, and better treatment effect.

The utility model relates to the technical field of water treatment, in particular to a sewage deep nitrogen and phosphorus removal treatment device which comprises a first reaction tank, a second reaction tank, a sedimentation tank and a third reaction tank which are connected in sequence, the first reaction tank is used for carrying out denitrification treatment on the sewage, so that nitrate in the sewage is reduced into nitrogen, and the total nitrogen concentration of the sewage is reduced; the second reaction tank is used for carrying out aerobic treatment on the sewage, so that ammonia in the sewage is oxidized into nitric acid, and phosphorus, organic matters and chemical oxygen demand in the sewage are reduced; the third reaction tank is used for carrying out denitrification treatment on the sewage. The sewage treatment device has the beneficial effects that denitrification and aerobic reaction processes are optimized according to the quality of sewage, the denitrification reaction time is prolonged through the first reaction tank, organic matters in inlet water are fully utilized for denitrification nitrogen removal, and meanwhile, chemical oxygen demand and total nitrogen are removed. The second reaction tank is used for completing nitration reaction and further reducing the chemical oxygen demand of the sewage.

The application discloses a process for treating dyeing wastewater by a membrane method, and comprises the following steps: pretreating the dyeing wastewater, including grating, adjusting pool, coagulation and sedimentation, and filtration, to obtain filtered wastewater; the filtered wastewater enters a security filter to be subjected to secondary filtration, to obtain secondary filtered wastewater; the secondary filtered wastewater enters an NXF membrane system, and the wastewater is divided into two streams, one of which is a concentrated solution which does not reach a set concentration, and the other of which is a permeate; the concentrated solution which does not reach the set concentration returns to a front end inlet to be subjected to filtration in the NXF membrane system again; when the concentration reaches the set concentration, the concentrated solution enters a concentration storage tank to be subjected to other treatment; and the permeate enters subsequent treatment. The application aims at solving the technical problem of poor treatment effect of dyeing wastewater.

The invention discloses a method for activating, hydrolyzing and polymerizing papaya procyanidine by adopting plasma. The method mainly comprises the following steps: extracting and purifying procyanidine from pawpaw; a plasma device is adopted to prepare plasma activated water, the output power is 50-70 W, and the treatment time is 2-6 min; stirring the papaya procyanidine, the nucleophilic reagent and the plasma activated water according to the mass ratio of 1: 1: 98 at the temperature of 15-25 DEG C for 8-18 minutes; and carrying out centrifugal separation on the fully and uniformly mixed liquid, and carrying out freeze-drying treatment on the supernate at the temperature of 60 DEG C below zero for 36 hours to finally obtain the depolymerized papaya procyanidine. The papaya proanthocyanidins are subjected to plasma activation hydrolytic polymerization treatment, the polymerization degree of the papaya proanthocyanidins can be reduced, the biological activity of the papaya proanthocyanidins can be improved, the papaya proanthocyanidins can be absorbed by the human body more easily, and the method is safer to operate and can be applied to industrialized production; and meanwhile, no extra chemical reagent is added in the depolymerization treatment process, so that the method conforms to the green, environment-friendly and healthy development trend.

The invention discloses a microbial electrolysis hydrogen production method and system for ecological restoration, the system comprises a reaction tank, one side of the reaction tank is fixedly provided with a mounting box, the reaction tank is internally provided with a cathode chamber and an anode chamber, and the mounting box is internally provided with a lift pump; the cathode chamber and the anode chamber are separated through an exchange membrane, so that a water body flows through the anode electrode in a one-way manner, organic matters in the water body are oxidized and decomposed through electrogenesis bacteria attached to the surface of the anode electrode, the chemical oxygen demand in the water body is reduced, meanwhile, hydrogen ions and electrons are generated, the hydrogen ions enter the cathode chamber through the exchange membrane, and the electrons enter the anode chamber through the exchange membrane. The electrons enter the cathode electrode through an external circuit; in the cathode chamber, chlorella is used as a biological cathode to receive hydrogen ions and electrons, sewage treatment is carried out, and the chemical oxygen demand in the water body is further reduced.

This invention relates to the field of chemical synthesis technology and discloses a method for synthesizing methyl acetoacetate, an intermediate of nifedipine. The method includes: a first pretreatment system preparation step, in which methyl acetoacetate is mixed with a basic catalyst in an aprotic polar solvent, and a free radical scavenger and a complexing stabilizer are added to obtain a pre-activated solution; a second pretreatment system preparation step, in which 3-nitrobenzaldehyde is pre-complexed with a Lewis acid catalyst and a coordination stabilizer is added to obtain a pre-complexed solution; a microchannel rapid mixing reaction step, in which the two pretreatment solutions are rapidly mixed in milliseconds through a microchannel mixer to induce a condensation reaction; and a rapid quenching and product separation step, in which the reaction is immediately quenched at the microchannel outlet and the product is separated. This invention solves the technical problems of low catalytic efficiency, unstable pretreatment solutions, and uneven mixing in traditional methods.

The invention provides a method for treating and recycling spodumene beneficiation wastewater, and belongs to the field of beneficiation wastewater treatment. According to the method, the composite polymeric flocculant is prepared and added into the spodumene beneficiation wastewater, fine particles suspended in the wastewater can be effectively captured, floccules with larger volumes can be formed, and therefore efficient flocculating settling is conducted; and on the basis, the supernate subjected to flocculating settling is sequentially subjected to ultrasonic treatment and oxidation treatment, so that the oxidation effect can be enhanced by utilizing a force field of ultrasonic waves, and the degradation rate of organic matters is increased. By means of the mode, the chemical oxygen demand of the spodumene beneficiation wastewater and the content of suspended solids, calcium ions and magnesium ions in the wastewater can be effectively reduced through the simple technology, few raw materials and short time, and backwater obtained after treatment can be reused in the flotation technology of spodumene; and cyclic utilization and zero emission of spodumene beneficiation wastewater are realized.

The invention discloses a sewage treatment agent with biological activity and a preparation method thereof. The sewage treatment agent comprises the following components: 10-30 parts of diatomite, 20-40 parts of bentonite, 5-10 parts of iron powder, 5-10 parts of ferric trichloride, 12-20 parts of quick lime, 5-15 parts of activated carbon and 7-11 parts of a microbial agent. The sewage treatment agent with biological activity is quick and convenient to produce and low in cost, contains biological agents, can properly adjust the types and the amount of the biological agents in the treatment agent according to different sewage environments, greatly reduces COD, BOD and SS of the sewage treated by the treatment agent, correspondingly reduces the contents of total nitrogen, total phosphorus and ammonia nitrogen, and has a wide application prospect. The burden of the sewage after-treatment process is relieved; and large-batch production can be realized, a large amount of sewage can be effectively treated within a short time, and the sewage treatment efficiency is greatly improved.

The invention discloses equipment and a method for reducing organic matters in wastewater evaporation mother liquor, and relates to the technical field of wastewater treatment.The equipment is characterized in that a filter box is arranged at the bottom of a filter tank, and a first connecting pipe is arranged between the filter tank and the filter box; an electric treatment box is arranged on one side of the filter box; a flow guide pipe is arranged between the filter box and the electric treatment box; a treatment tank is arranged on one side of the electric treatment box, a water outlet pipe is arranged between the electric treatment box and the treatment tank, the other end of the water outlet pipe is located in the treatment tank, and the end, in the treatment tank, of the water outlet pipe is connected with an evaporation tank. According to the equipment and the method for reducing the organic matters in the wastewater evaporation mother liquor, the electric treatment box is arranged, so that COD in the mother liquor is reduced, and a salt product for producing crystalline salt is improved.

The utility model discloses a device for treating 2-amino-4-methylbenzothiazole production mother liquor, and relates to the technical field of chemical wastewater treatment. The device comprises a treatment tank for storing mother liquor, an ozone generator is arranged outside the treatment tank; the ozone generator supplies gas through an external gas source system, and the output end of the ozone generator is connected with an exhaust pipe; the exhaust pipe extends into the bottom end in the treatment tank; a submersible pump and an ultra-fine bubble generator are further mounted at the bottom end in the treatment tank; the submersible pump supplies liquid to the ultra-fine bubble generator; and the output end of the exhaust pipe is correspondingly connected with the air inlet end of the ultra-fine bubble generator. The device has the beneficial effects that the problems of poor treatment effect, high cost, high possibility of secondary pollution and the like in the existing treatment technology can be solved, and high-efficiency purification and secondary recycling of the mother liquor are realized.

The application discloses a pollution river and lake ecological management system and method based on renewable utilization of building solid wastes, and relates to the field of ecological management of polluted rivers and lakes.The pollution river and lake ecological management system comprises a primary filter device and a layered ecological restoration device.The layered ecological restoration device comprises a plurality of layered ecological restoration units connected in series, and each layered ecological restoration unit comprises a drainage layer, a composite filter material cushion layer, a composite renewable filler layer and a reverse filtration plant layer.The drainage layer is made of concrete building waste renewable aggregates and / or brick building waste renewable aggregates.The composite filter material cushion layer is made by mixing concrete building waste renewable aggregates, brick building waste renewable aggregates and non-sintered clay-based functional aggregates.The composite renewable filler layer is made by mixing concrete building waste renewable aggregates, brick building waste renewable aggregates, non-sintered clay-based functional aggregates and modified paper mill dry sludge particles.The application can realize purification treatment of polluted river and lake water and renewable utilization of building solid wastes.

The preparation method comprises the following steps: respectively forming an upper-layer film and a lower-layer film by using a soluble gel material through a protective film forming mold, and injecting various components of a liquid carbon source into different parts of the lower-layer film in a one-to-one correspondence manner according to a proportion; the upper outer layer film covers the surface of the lower layer film and hermetically connects the upper layer film and the lower layer film at the periphery of each component liquid carbon source, so that each component of the liquid carbon source is hermetically coated in each hollow cavity formed between the upper layer film and the lower layer film; the liquid carbon source is prevented from volatilizing outwards in the storage and transportation processes to pollute the environment and reduce the COD (Chemical Oxygen Demand) of the carbon source, the liquid carbon source is ensured to have high equivalent weight in use, and is directly added in use or added after being prepared as a medicament, the use is convenient, and the soluble gel material is prepared from a solid carbon source and is environment-friendly. The sealing performance, the stability and the environmental protection performance of the carbon source are ensured, and the utilization rate of the carbon source is also improved.