15 results about "Greywater reuse" patented technology

This application relates to the field of wastewater treatment technology, specifically to a method for controlling the reuse of recycled water in wastewater treatment processes. The method includes: collecting various parameter data; calculating the transmembrane pressure difference based on pressure, fitting a straight line to obtain the rate of change of the transmembrane pressure difference; constructing a trend sequence using desalination rate, transmembrane pressure difference, and permeate flow rate, and determining the RO membrane quality coefficient based on the variance of the trend sequence, the correlation differences among the data constituting the trend sequence, and the rate of change of the transmembrane pressure difference; fitting the permeate flow rate curve, and determining the pre-RO membrane characteristic coefficient based on the difference in the permeate flow rate change rate, the mean of influent turbidity, the mean of elemental change rate, and the RO membrane quality coefficient; adjusting the membrane cleaning interval after the adjustment in the previous cycle based on the RO membrane quality coefficient and the pre-RO membrane characteristic coefficient to obtain the adjusted membrane cleaning interval for each cycle; and cleaning the RO membrane based on the adjusted membrane cleaning interval for each cycle. This application ensures the stability of water treatment quality.

The application provides a sewage treatment method based on A2O-MBR membrane technology, and belongs to the technical field of sewage treatment. The technical scheme is as follows: step one, pretreating sewage; step two, feeding the pretreated sewage into an improved A2O biological treatment section; step three, carrying out sludge refluxing between the anaerobic section, the anoxic section and the aerobic section; step four, carrying out MBR membrane separation on the sewage treated by the improved A2O biological treatment; step five, carrying out advanced treatment on the effluent after the MBR membrane separation; and step six, intelligently controlling and energy-saving adjusting the system operation process and monitoring system operation parameters in real time. The application has the beneficial effects that: the application combines biological denitrification and dephosphorization, membrane separation and intelligent control, improves the sewage treatment efficiency and the effluent stability, reduces membrane pollution and operation energy consumption, and takes into account sludge reduction and water reuse.

This utility model belongs to the field of urban water conservation and discloses an integrated system for rainwater harvesting and greywater reuse in buildings. It includes a rainwater harvesting system comprising a rainwater tank, rainwater collection pipes, rainwater downpipes, and a rainwater outlet pipe. The rainwater tank is installed within the building body, the rainwater collection pipes are fixed to the top of the building body and connected to the rainwater tank, and a rainwater overflow pipe is installed inside the rainwater tank. The rainwater downpipes are installed on the side walls of the building body, and the rainwater overflow pipes are connected to the rainwater downpipes. The rainwater outlet pipe is installed on the side wall of the rainwater tank. A greywater system is also included. Rainwater is collected from the top floor of the building body through the rainwater collection pipes, and then connected to the greywater system through the rainwater outlet pipes. This allows the rainwater collected by the building body to be reused for indoor washing, avoiding the situation where rainwater collected by the building cannot be fully utilized by the rain garden, thus improving the utilization rate of rainwater.

The utility model discloses a novel coal chemical industry water reuse treatment device, its characterized in that, including solid -liquid separation equipment, sedimentation tank, tubular ultrafiltration membrane group, clear water pool, the sedimentation tank includes pool body, and the pool body is divided into first settlement chamber, second settlement chamber, third settlement chamber in portion, and first settlement chamber is communicated with second settlement chamber through high -lying first overflow port, and second settlement chamber is communicated with third settlement chamber through low -lying second overflow port, and each overflow port place all fixed mounting has filter plate, the liquid outflow end of solid -liquid separation equipment is communicated with the first settlement chamber of sedimentation tank, and the third settlement chamber of sedimentation tank is communicated with the liquid inflow end of tubular ultrafiltration membrane group through second water pump, the clean water outflow end of tubular ultrafiltration membrane group is communicated with clear water pool, and its sewage outflow end is communicated with the first settlement chamber of sedimentation tank through second pipeline, has simple structure, practicality is strong, can continuous operation, and wastewater treatment capacity is big, wastewater treatment effect is better and so on technical features.

The application discloses a kind of multistage water circulation system and method for mixed plastic cleaning, belong to plastic cleaning technical field.System includes plastic cleaning module, mechanical filtration module and sewage disposal module.Plastic cleaning module uses reverse water circulation design, the cleaning drainage of back-end water washing equipment is supplied to intermediate water washing equipment in reverse, the cleaning drainage of intermediate water washing equipment is supplied to front-end water washing equipment in reverse, realize the gradient utilization of cleaning water.Mechanical filtration module carries out coarse filtration and fine filtration to front-end cleaning drainage, filtrate is shunted according to water quality, part is directly reused to back-end water washing equipment, part enters sewage disposal module.Sewage disposal module produces high-quality reclaimed water by biochemical treatment and desalination treatment and is reused to back-end water washing equipment.The application improves cleaning effect and water resource utilization rate, reduces fresh water consumption and wastewater discharge, solves salt accumulation problem, and reduces operating cost.

The utility model discloses a kind of reclaimed water reuse device, belong to reclaimed water reuse technical field, it includes sedimentation bin, the one side of the sedimentation bin is equipped with filter bin, the one side of the filter bin is equipped with aeration bin, connecting rod is equipped between the sedimentation bin, filter bin and aeration bin.The reclaimed water reuse device, by setting sedimentation bin, filter bin and aeration bin, sedimentation bin, filter bin and aeration bin, form an organic whole processing system, this design makes the flow of reclaimed water between each processing link more smooth, avoids the water flow interruption or backflow phenomenon caused by the connection between device complex, from the preliminary filtration of sedimentation bin, to depth purification of filter bin, to biodegradation of aeration bin, whole processing process is complete, greatly improve the overall efficiency of reclaimed water treatment, make the operation of entire reclaimed water reuse device more efficient, stable, can better meet the demand of actual application to reclaimed water rapid treatment and reuse.

The utility model discloses MBR sewage treatment and water reuse device, include: device main body, filter component, device main body includes pretreatment pool, adjusting pool, MBR membrane filter pool, disinfection pool and the control box fixed installation of pretreatment pool outer end, filter component includes the filter grating of the movable installation in pretreatment pool. MBR sewage treatment and water reuse device of the utility model, the left filter chamber and the right filter chamber of the filter grating both sides setting in pretreatment pool can be adjusted to the filter of sewage in the bottom of inlet pipe alternately moves to the second electric push rod, to avoid the problem of the long -time use of single filter structure and appear the blockage, simultaneously, in the alternate use of left filter chamber and right filter chamber, the filter chamber that does not use can also carry out the timely unified push material of the filter impurities in it through the push material block of the drive of first electric push rod, to export through the one side's discharge port and discharge nozzle, avoid the impurities of filtration to accumulate in left filter chamber or right filter chamber.

The application provides a device and process for advanced treatment and reuse of gasification wastewater. The device comprises a pretreatment unit, two-stage AO treatment unit, advanced denitrification unit and reclaimed water reuse unit connected in sequence. The application also discloses a method for advanced treatment and reuse of gasification wastewater using the device. The method integrates two-stage AO biological denitrification, autotrophic denitrification and membrane separation and reuse technology, realizes a complete technical route from advanced denitrification to full reuse of gasification wastewater, and has the advantages of high denitrification efficiency, low risk of organic pollution of the membrane system, low operation cost, high water resource recycling rate and the like.

The utility model belongs to industrial wastewater treatment technical field relates to a kind of full-process salt separation zero discharge system of high-salt high-organic wastewater, including biochemical pretreatment system unit, main biochemical system unit, reclaimed water reuse system unit, salt separation concentration system unit and crystallization resource unit, the crystallization resource unit includes sodium chloride crystallization system unit, sodium sulfate crystallization system unit and miscellaneous salt crystallization system unit.The utility model is through biochemical pretreatment system unit, main biochemical system unit, reclaimed water reuse system unit, salt separation concentration system unit and crystallization resource unit, above process flow wastewater is all reused or converted into solid after processing, realize wastewater zero discharge;While obtaining two kinds of resource products of sodium sulfate and sodium chloride, remaining miscellaneous salt is disposed as solid waste, and miscellaneous salt rate is ≤15%.

This utility model discloses a constant pressure device for a greywater reuse system, including a fixed base plate. A first water pump and a second water pump are fixedly installed on both sides of the top of the fixed base plate, respectively. The constant pressure device of this utility model controls the opening of a first solenoid valve and a third solenoid valve, and the greywater in the greywater reuse pipe is introduced into a first outlet pipe through the first water pump, and then into an industrial water pipe. The water pressure at the end of the industrial water pipe is monitored by a first pressure gauge. If the pressure is lower than a preset value, the first pressure gauge will feed back the information to the corresponding control mechanism, which will then control the opening of a second solenoid valve and a fourth solenoid valve, and the greywater will be introduced into a second outlet pipe through the second water pump, and then into an industrial water pipe. The pressure in the middle section of the industrial water pipe is monitored by a second pressure gauge until the pressure reaches the preset value, thereby achieving a constant pressure supply of greywater.

A method for treating high-concentration wastewater and reusing it using a fully automated short-process membrane technology effectively solves the problems of lengthy processes, easy membrane fouling, and high investment and operating costs associated with traditional high-concentration wastewater reusing processes. The method includes the following steps: S1: Pretreatment and hardness removal: The high-concentration wastewater to be treated is passed through an integrated hardness removal device, where chemicals are added to remove hardness, turbidity, heavy metal ions, and organic matter; S2: Filtration and purification; S3: Precision filtration and core desalination; S4: Permeate reuse: The freshwater produced by the reverse osmosis device in step S3 is collected and transported to water usage points within the plant for reuse. This method greatly simplifies the process chain, reduces the number of equipment, system footprint, and pump energy consumption.

A nuclear wastewater resource utilization treatment process includes the following steps: S1, ion exchange impurity removal: The nuclear wastewater is passed through a multi-bed ion exchange unit to remove cationic and anionic impurities, resulting in deionized wastewater; S2, adsorbent deep purification: The deionized wastewater is passed through a multi-bed adsorbent adsorption unit to adsorb molecular pollutants, resulting in purified wastewater; S3, membrane tritium recovery: The purified wastewater is passed through a membrane separation unit to separate and recover tritium from the purified wastewater, resulting in tritium-enriched solution and low-tritium purified water; S4, greywater reuse: The low-tritium purified water is passed through a greywater reuse unit, and after passing testing, it is recycled to the plant's conventional water facilities. This invention optimizes the process, reduces adsorbent loss, realizes the resource utilization of nuclear wastewater, and has low system operating costs and strong environmental protection, making it suitable for treating nuclear industry wastewater containing various impurities.

The present application relates to the technical field of seawater comprehensive utilization, and particularly relates to a seawater resource high-concentration and salt separation method and product. The product is prepared by the method. The method comprises the following steps: after seawater raw water is filtered through a grid, the seawater is sequentially subjected to flocculation and precipitation treatment, multi-medium filtration treatment and ultrafiltration treatment to obtain purified seawater; the purified seawater is subjected to primary reverse osmosis treatment, the produced water is used as reclaimed water, and the concentrated water is subjected to first nanofiltration salt separation treatment; the produced water after the first nanofiltration salt separation treatment is subjected to main line treatment to obtain a main product; and the concentrated water after the first nanofiltration salt separation treatment is subjected to side line treatment to obtain a side product. The present application can truly realize the co-production of seawater "fresh water production" and "chemical raw material preparation".

The utility model discloses a kind of stirring device in pretreatment system based on reclaimed water reuse, including support frame and stirring cylinder, the stirring cylinder is rotatably connected in support frame interior by bearing, cleaning assembly is installed in the top of support frame, the cleaning assembly includes the mounting bracket one of support frame top outer wall fixed connection, four equidistance distribution mounting rods are rotatably connected in the inside of mounting bracket one, one spray head is fixedly connected in the middle position of four mounting rods, one bevel gear is coaxially fixed in the both ends of four mounting rods, two adjacent bevel gears are engaged with each other, one mounting rod is coaxially fixed with gear ring one outside, the utility model is set up cleaning assembly, the inside wall of stirring cylinder and stirring structure can be cleaned comprehensively, cleaning process is fast and convenient, ensure that device can be faster put into work, and staff need not directly contact dirt.

A kind of bleaching and dyeing wastewater treatment and water reuse equipment, belong to bleaching and dyeing wastewater treatment equipment technical field, including loading tank body, flushing device, rodless cylinder, filter device, drainage pipeline, blow-off pipeline, fixed leg, it is characterized by: the lower surface outside of the inside of the loading tank body is connected with flushing device, the upper surface middle of the flushing device is penetrated and inserted with rodless cylinder, the upper surface of the loading tank body is inserted with filter device in the center, the lower surface of the loading tank body is connected with drainage pipeline in the center, the side surface lower edge of the loading tank body is connected with blow-off pipeline, the lower surface rear edge of the loading tank body is evenly distributed and connected with several fixed legs, can filter out sediment from wastewater at one time, and when cleaning sediment, can save water resources by using filtered wastewater in container.