11results about How to "Reduce COD" patented technology

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 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.

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 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.