CN211283951U - Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness - Google Patents
Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness Download PDFInfo
- Publication number
- CN211283951U CN211283951U CN201921548827.0U CN201921548827U CN211283951U CN 211283951 U CN211283951 U CN 211283951U CN 201921548827 U CN201921548827 U CN 201921548827U CN 211283951 U CN211283951 U CN 211283951U
- Authority
- CN
- China
- Prior art keywords
- wastewater
- tank
- zero
- communicated
- struvite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The utility model discloses a waste water zero release pretreatment systems suitable for total alkalinity is greater than calcium hardness, include: the device comprises a reaction tank, a dosing device, a membrane filter tank, an ion exchange resin device, a zero-emission advanced treatment device, a regeneration device and a struvite preparation device; the medicine adding device is communicated to the reaction tank; the reaction tank is communicated to the membrane filtration tank; the membrane filtering tank is communicated to the ion exchange resin device; the ion exchange resin device is communicated to the zero-emission advanced treatment device; the regeneration device is communicated to the ion exchange resin device; the struvite preparation device is communicated to the regeneration device. The pretreatment efficiency of the wastewater zero-discharge pretreatment system suitable for the total alkalinity of which is greater than the calcium hardness is higher, the operation cost is effectively reduced, the recycling of substances can be realized, and the economical efficiency is improved.
Description
Technical Field
The utility model relates to a waste water zero release pretreatment systems suitable for total alkalinity is greater than calcium hardness.
Background
In the wastewater zero-discharge pretreatment system, whether the pretreatment can meet the design requirement is the premise that the system can stably run. The pretreatment mainly involves removal of substances causing membrane fouling such as calcium, magnesium ions, and the like. The mature softening process commonly used at present mainly comprises dosing softening. The common processes comprise lime softening, lime-soda softening, caustic soda softening, double-alkali softening, ion exchange resin softening and the like, while the ion exchange resin softening cannot really remove hardness from the system, and the dosing softening usually has the problems of high dosing cost, large dosage, high sludge content, more subsequent softening problems and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a waste water zero release pretreatment systems suitable for total alkalinity is greater than calcium hardness adopts following technical scheme:
a wastewater zero-discharge pretreatment system adapted for use with total alkalinity greater than calcium hardness, comprising: the device comprises a reaction tank, a dosing device, a membrane filter tank, an ion exchange resin device, a zero-emission advanced treatment device, a regeneration device and a struvite preparation device, wherein the reaction tank is used for reacting and precipitating wastewater, the dosing device is used for adding a medicament into the reaction tank, the membrane filter tank is used for filtering the wastewater treated by the reaction tank, the ion exchange resin device is used for adsorbing magnesium ions in the wastewater filtered by the membrane filter tank and is strong in acidity, the zero-emission advanced treatment device is used for collecting the wastewater treated by the ion exchange resin device and is advanced, the regeneration device is used for reducing the resin adsorbed with a large amount of magnesium ions in the ion exchange resin device to the strong acidity, and the struvite preparation device is used for treating regenerated waste liquid containing a large amount of magnesium ions and sodium chloride generated after the resin is reduced in the regeneration device to prepare; the medicine adding device is communicated to the reaction tank; the reaction tank is communicated to the membrane filtration tank; the membrane filtering tank is communicated to the ion exchange resin device; the ion exchange resin device is communicated to the zero-emission advanced treatment device; the regeneration device is communicated to the ion exchange resin device and the struvite preparation device.
Further, the upper part of the reaction tank is communicated to the membrane filtration tank.
Furthermore, a ceramic flat membrane is arranged in the membrane filter tank.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity larger than the calcium hardness is also provided with a regeneration waste liquid homogenizing tank for homogenizing the regeneration waste liquid in the regeneration device; the regeneration waste liquid homogenizing tank is communicated with the regeneration device and the struvite preparation device.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity being greater than the calcium hardness is also provided with a wastewater homogenizing tank for homogenizing the wastewater discharged into the reaction tank; the wastewater homogenizing pool is communicated to the reaction pool.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a wastewater reflux device for refluxing the wastewater which is treated by the struvite preparation device and then is subjected to magnesium ion and sodium chloride removal; the wastewater reflux device is communicated with the struvite preparation device and the reaction tank.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity greater than the calcium hardness is also provided with a sludge reflux device for refluxing part of sludge in the membrane filtration tank to the reaction tank; the sludge reflux device is communicated with the membrane filtering tank and the reaction tank.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity being greater than the calcium hardness is also provided with a sludge discharge device for discharging the other part of sludge in the membrane filtration tank and sludge generated by the reaction in the struvite preparation device; the sludge discharge device is communicated with the membrane filter tank and the struvite preparation device.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity being greater than the calcium hardness is also provided with a sludge concentration tank for collecting sludge discharged by the sludge discharge device; one end of the sludge discharge device is communicated to the sludge concentration tank.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity being greater than the calcium hardness is also provided with a struvite collecting device for collecting the struvite generated by the reaction in the struvite preparation device; the struvite collecting device is communicated to the struvite preparation device.
Furthermore, the wastewater zero-discharge pretreatment system suitable for the total alkalinity being greater than the calcium hardness is also provided with a wastewater homogenizing tank for homogenizing the wastewater discharged into the reaction tank; the wastewater homogenizing pool is communicated to the reaction pool.
The utility model discloses an useful part lies in the waste water zero release pretreatment systems who is applicable to that total basicity is greater than calcium hardness that provides and filters the combination through single medicine softening and ceramic membrane, softens efficiently. Only one inorganic salt is added in the medicine type, and organic substances such as flocculating agents and the like which are easy to block membrane pores are not added, so that the stability of the operation of a filtering membrane in the membrane filtering tank is ensured. The calcium ions can be removed and the magnesium ions can be reserved by controlling the pH value of the added medicine to be about 10. And the regeneration device is adopted to regenerate the resin in the ion exchange resin device, so that the cyclic utilization is realized. And (4) carrying out struvite preparation on the regenerated waste liquid in the regeneration device, and realizing the recycling of substances. Therefore, by adopting effective softening combination, the softening design requirement can be met, the dosage is greatly reduced, the dosing system is simplified, the economical efficiency is improved, the recycling of substances in the wastewater can be realized, and byproducts with higher economic value are generated.
Drawings
Fig. 1 is a schematic diagram of a wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness of the present invention.
The system comprises a wastewater zero-discharge pretreatment system 10 suitable for treating wastewater with total alkalinity larger than calcium hardness, a reaction tank 11, a dosing device 12, a membrane filtration tank 13, an ion exchange resin device 14, a zero-discharge advanced treatment device 15, a regeneration device 16, a struvite preparation device 17, a regenerated waste liquid homogenizing tank 18, a wastewater backflow device 19, a sludge backflow device 20, a sludge discharge device 21, sludge concentration 22, a struvite collection device 23 and a wastewater homogenizing tank 24.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a zero discharge pretreatment system 10 for wastewater with total alkalinity greater than calcium hardness comprises: the device comprises a reaction tank 11, a dosing device 12, a membrane filtration tank 13, an ion exchange resin device 14, a zero-emission advanced treatment device 15, a regeneration device 16 and a struvite preparation device 17.
The reaction tank 11 is used for reacting and precipitating the wastewater. The medicine adding device 12 is used for adding a medicine into the reaction tank 11. The membrane filtration tank 13 is used for filtering the wastewater treated by the reaction tank 11. The ion exchange resin device 14 is strongly acidic and can be used for adsorbing magnesium ions in the wastewater filtered by the membrane filtration tank 13. The zero-discharge advanced treatment device 15 is used for collecting the wastewater treated by the ion exchange resin device 14 and carrying out advanced treatment. The regeneration unit 16 is used to reduce the resin with a large amount of magnesium ions adsorbed therein in the ion exchange resin unit 14 to a strongly acidic one. The struvite preparation device 17 is used for treating the regeneration waste liquid containing a large amount of magnesium ions and sodium chloride generated after strong acidity of the reduction resin in the regeneration device 16 to prepare struvite. Specifically, the chemical adding device 12 is communicated to the reaction tank 11. The reaction tank 11 is communicated to a membrane filtration tank 13. The membrane filtration tank 13 is communicated to an ion exchange resin device 14. The ion exchange resin device 14 is communicated to a zero-emission advanced treatment device 15. The regeneration device 16 is communicated to the ion exchange resin device 14 and the struvite preparation device 17.
Specifically, the chemical adding device 12 adds a sodium hydroxide chemical into the reaction tank 11. The wastewater with the total alkalinity being larger than the calcium hardness is discharged into the reaction tank 11 and then is subjected to precipitation reaction with sodium hydroxide agent to remove the hardness in the wastewater. The wastewater after the precipitation reaction in the reaction tank 11 enters a membrane filtration tank 13 for membrane filtration. The wastewater after membrane filtration enters the strongly acidic ion exchange resin device 14. The resin in the ion exchange resin unit 14 reacts with the wastewater to further soften and remove magnesium ions from the wastewater to achieve deep hardness removal. The water treated by the ion exchange resin device 14 enters a zero-emission advanced treatment device 15 for use by a zero-emission membrane device. After the ion exchange resin device 14 reacts with magnesium ions, the resin absorbed with a large amount of magnesium ions enters the regeneration device 16 for reduction. The regeneration waste liquid generated by the regeneration device 16 for reducing the resin contains a large amount of magnesium ions and sodium chloride. And finally, discharging the regenerated waste liquid into a struvite preparation device 17 for preparing struvite.
In the scheme, the pH value in the reaction tank 11 is controlled to be 9.8-10.2, and the coagulating sedimentation time for the reaction of the wastewater and the sodium hydroxide medicament is 30-60 min. This ensures that the reaction between the waste water and the sodium hydroxide reagent is sufficient.
The regeneration liquid of the regeneration device 16 is 5% -8% sodium chloride solution or is prepared by adopting a zero sodium chloride product.
The struvite preparation device 17 comprises a dosing system, a crystallization system and a drying and centrifuging system.
The struvite preparation device can be an integrated or split preparation device and the like which can play the same role. The type of the drug added by the struvite preparation device can be a pH adjusting drug, a phosphorus-related drug or an ammonium-related drug. The prepared struvite product is sold as a product, and the economy of the wastewater zero-discharge pretreatment system 10 suitable for the wastewater with the total alkalinity being greater than the calcium hardness can be improved.
The agent of the dosing device can also be calcium hydroxide or quicklime.
In a specific embodiment, the filtering membrane in the membrane filtering tank 13 is a ceramic flat membrane.
This scheme adopts single medicine softening mode of adding to carry out the filtration combination with membrane filtration tank 13, and with pH value control about 10, has not only reduced and has added medicine kind and the medicine volume of adding, still makes charge device 12 simplify, has also practiced thrift the acid quantity for follow-up callback pH value simultaneously. And the alkalinity is removed, so that the scaling risk of a subsequent evaporation system and a membrane concentration system is solved. As the sustainable SS of the ceramic flat membrane can reach 8000-one 12000mg/L, the membrane filtration can be directly carried out without adding a flocculating agent, and the problem of membrane system blockage caused by adding the flocculating agent is solved. The single dosing process only realizes the removal of calcium ions and retains magnesium ions in the wastewater. Magnesium ions in the wastewater are adsorbed and removed in the resin softening process in the ion exchange resin device 14, and simultaneously residual trace calcium ions can be further removed, so that the wastewater is thoroughly softened. Most of the ions adsorbed by the ion exchange resin device 14 are magnesium ions, and the adsorption function of the resin can be recovered by the regeneration process of the regeneration device 16. The ions contained in the regeneration waste liquid in the regeneration device 16 are mainly magnesium ions and sodium chloride. The regenerated waste liquid is discharged into a bird wastewater preparation device to prepare struvite, so that magnesium ions are thoroughly removed, the product struvite has great economic value, and the effect of changing waste into valuable is realized.
As a preferred embodiment, the upper part of the reaction tank 11 is communicated to the membrane filtration tank 13, so that the effluent water after reaction and precipitation above the reaction tank 11 is discharged into the membrane filtration tank 13 for filtration.
As an alternative mode, the filtering membrane in the membrane filtering tank can also adopt a ceramic tubular membrane and other filtering membranes with strong alkali resistance.
In a preferred embodiment, the wastewater zero-discharge pretreatment system 10 suitable for the total alkalinity being greater than the calcium hardness is further provided with a regeneration waste liquid homogenizing tank 18. The regeneration waste liquid homogenizing tank 18 is used for homogenizing the regeneration waste liquid in the regeneration device 16 to ensure that the regeneration waste liquid can fully react with the medicament in the struvite preparation device 17 after entering the struvite preparation device 17. The regeneration waste liquid homogenizing tank 18 is communicated with the regeneration device 16 and the struvite preparation device 17.
In a preferred embodiment, the wastewater zero-discharge pretreatment system 10 suitable for the total alkalinity being greater than the calcium hardness is further provided with a wastewater homogenizing tank 24. The wastewater homogenizing tank 24 is used for homogenizing the wastewater discharged into the reaction tank 11 to ensure that the wastewater entering the reaction tank 11 can fully react with the medicament in the reaction tank 11. The wastewater homogenizing tank 24 is communicated to the reaction tank 11.
More specifically, the wastewater zero-discharge pretreatment system 10 suitable for use with total alkalinity greater than calcium hardness is further provided with a wastewater return 19. The wastewater reflux device 19 is used for refluxing the wastewater which is treated by the struvite preparation device 17 and then is subjected to magnesium ion and sodium chloride removal. The wastewater reflux device 19 is communicated with the struvite preparation device 17 and the reaction tank 11. The struvite preparation device 17 uses the regeneration waste liquid containing a large amount of magnesium ions and sodium chloride to prepare struvite, and then the waste water generated after the struvite is prepared is returned to the reaction tank 11 through the waste water return device 19.
As a preferred embodiment, the wastewater zero-discharge pretreatment system 10 suitable for the total alkalinity being greater than the calcium hardness is further provided with a sludge reflux device 20. The sludge reflux device 20 is used for refluxing a part of sludge in the membrane filtration tank 13 to the reaction tank 11. The sludge reflux device 20 is communicated with the membrane filtration tank 13 and the reaction tank 11. In this way, part of the sludge containing the magnesium hydroxide seed crystals in the membrane filtration tank 13 can be returned to the reaction tank 11. The magnesium hydroxide seed crystal can promote the softening reaction in the reaction cell 11.
Further, the wastewater zero-discharge pretreatment system 10 suitable for the total alkalinity being greater than the calcium hardness is also provided with a sludge discharge device 21. The sludge discharge device 21 is used for discharging the other part of sludge in the membrane filtration tank 13 and sludge generated by the reaction in the struvite preparation device 17. Specifically, the sludge discharge device 21 communicates the membrane filtration tank 13 and the struvite preparation device 17.
In a preferred embodiment, the wastewater zero-discharge pretreatment system 10 suitable for use with total alkalinity greater than calcium hardness is further provided with a sludge concentration tank 22. The sludge thickener 22 is used for collecting sludge discharged from the sludge discharge device 21. Specifically, one end of the sludge drain 21 is communicated to the sludge thickener 22.
As a preferred embodiment, the wastewater zero-discharge pretreatment system 10 suitable for the total alkalinity being greater than the calcium hardness is further provided with a struvite collecting device 23. The struvite collecting device 23 is used for collecting the struvite generated by the reaction in the struvite preparation device 17. Specifically, the struvite collecting device 23 communicates with the struvite preparation device 17.
In the scheme, the wastewater zero-discharge pretreatment system 10 suitable for the wastewater with the total alkalinity larger than the calcium hardness is combined with the ceramic membrane filtration through single dosing softening, and the softening efficiency is high. Only one inorganic salt is added in the medicine type, and organic substances such as flocculating agents and the like which are easy to block membrane pores are not added, so that the running stability of the filtering membrane in the membrane filtering tank 13 is ensured. The calcium ions can be removed and the magnesium ions can be reserved by controlling the pH value of the added medicine to be about 10. The resin in the ion exchange resin device 14 is regenerated by the regeneration device 16, and the cyclic utilization is realized. And the regenerated waste liquid in the regeneration device 16 is subjected to struvite preparation, so that the recycling of substances is realized. Therefore, by adopting effective softening combination, the softening design requirement can be met, the dosage is greatly reduced, the dosing system is simplified, the economical efficiency is improved, the recycling of substances in the wastewater can be realized, and byproducts with higher economic value are generated.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. A wastewater zero discharge pretreatment system adapted for use with total alkalinity greater than calcium hardness, comprising: the device comprises a reaction tank, a dosing device, a membrane filter tank, an ion exchange resin device, a zero-emission advanced treatment device, a regeneration device and a struvite preparation device, wherein the reaction tank is used for reacting and precipitating wastewater, the dosing device is used for adding a medicament into the reaction tank, the membrane filter tank is used for filtering the wastewater treated by the reaction tank, the ion exchange resin device is used for adsorbing magnesium ions in the wastewater filtered by the membrane filter tank and is strong in acid, the zero-emission advanced treatment device is used for collecting the wastewater treated by the ion exchange resin device and performing advanced treatment on the wastewater, the regeneration device is used for reducing the resin adsorbed with a large amount of magnesium ions in the ion exchange resin device to the strong acid, and the struvite preparation device is used for treating regenerated waste liquid containing a large amount of magnesium ions and sodium chloride and generated after the strong acid of the resin is reduced in the regeneration device; the medicine adding device is communicated to the reaction tank; the reaction tank is communicated to the membrane filtration tank; the membrane filtration tank is communicated to the ion exchange resin device; the ion exchange resin device is communicated to the zero-emission advanced treatment device; the regeneration device is communicated to the ion exchange resin device and the struvite preparation device.
2. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the upper part of the reaction tank is communicated to the membrane filtration tank.
3. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 2,
and a ceramic flat membrane is arranged in the membrane filter tank.
4. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the wastewater zero-discharge pretreatment system suitable for the total alkalinity larger than the calcium hardness is also provided with a regeneration waste liquid homogenizing tank for homogenizing the regeneration waste liquid in the regeneration device; the regeneration waste liquid homogenizing tank is communicated with the regeneration device and the struvite preparation device.
5. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a wastewater homogenizing tank for homogenizing the wastewater discharged into the reaction tank; the wastewater homogenizing pool is communicated to the reaction pool.
6. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a wastewater reflux device for refluxing the wastewater which is treated by the struvite preparation device and then is subjected to magnesium ion and sodium chloride removal; the wastewater backflow device is communicated with the struvite preparation device and the reaction tank.
7. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the wastewater zero-discharge pretreatment system suitable for the total alkalinity greater than the calcium hardness is also provided with a sludge reflux device for refluxing part of sludge in the membrane filtration tank to the reaction tank; the sludge reflux device is communicated with the membrane filtration tank and the reaction tank.
8. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 6,
the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a sludge discharge device used for discharging the other part of sludge in the membrane filtration tank and the sludge generated by the reaction in the struvite preparation device; the sludge discharge device is communicated with the membrane filter tank and the struvite preparation device.
9. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 8,
the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a sludge concentration tank for collecting the sludge discharged by the sludge discharge device; one end of the sludge discharge device is communicated to the sludge concentration tank.
10. The zero discharge pretreatment system for wastewater with total alkalinity greater than calcium hardness according to claim 1,
the wastewater zero-discharge pretreatment system suitable for the wastewater with the total alkalinity being more than the calcium hardness is also provided with a struvite collecting device used for collecting the struvite generated by the reaction in the struvite preparation device; the struvite collecting device is communicated to the struvite preparation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921548827.0U CN211283951U (en) | 2019-09-17 | 2019-09-17 | Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921548827.0U CN211283951U (en) | 2019-09-17 | 2019-09-17 | Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211283951U true CN211283951U (en) | 2020-08-18 |
Family
ID=72018285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921548827.0U Active CN211283951U (en) | 2019-09-17 | 2019-09-17 | Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211283951U (en) |
-
2019
- 2019-09-17 CN CN201921548827.0U patent/CN211283951U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105126742B (en) | A kind of method using modified kaolin sorbent treatment fluoride waste | |
| US20170044039A1 (en) | A water reclamation method integrating magnetic resin adsorption and electrosorption | |
| CN203878018U (en) | Desulfurization wastewater recycling and zero-discharge system | |
| CN107698092A (en) | A kind of packaged type fluorine-containing wastewater treatment method and device | |
| CN100564276C (en) | A kind of preparation method who removes the modified hydrotalcite of Trace Mercury in the water, cadmium ion | |
| JP2010172853A (en) | Boron-containing water treatment method | |
| CN103086545A (en) | Method and device for removing and recovering heavy metal in waste water through regenerated active carbon | |
| CN105541016A (en) | Inorganic-ammonium-salt-containing wastewater treatment system and recycling method thereof | |
| CN105540974A (en) | Processing method of high-hardness wastewater generated by ion exchange regeneration in high-concentration salt water treatment system | |
| CN211283951U (en) | Wastewater zero-discharge pretreatment system suitable for total alkalinity greater than calcium hardness | |
| CN207567053U (en) | A kind of packaged type fluorine-containing waste water processing apparatus | |
| JP4543481B2 (en) | Method for treating water containing boron and fluorine | |
| JP4618937B2 (en) | How to remove phosphorus from wastewater. | |
| CN101723430B (en) | Method for comprehensive utilization of waste water generated in purifying process of citric acid | |
| CN111115661A (en) | Nitric acid wastewater treatment system and method | |
| CN215798870U (en) | Low-concentration ammonia-nitrogen-manganese wastewater treatment system utilizing manganese tailings | |
| CN105198123A (en) | Membrane-softening treatment system and method used for supplement water for circulating water of reclaimed water source | |
| CN212640167U (en) | Membrane diffusion coagulation pretreatment system | |
| JP4543478B2 (en) | Method for treating boron-containing water | |
| CN209161509U (en) | A kind of salt refining system of electrolysis production chlorine and hydrogen | |
| JPS63236588A (en) | Treatment of phosphor-containing waste water | |
| CN209522723U (en) | Chemical nickel waste liquid and waste water treatment system | |
| CN205099513U (en) | Processing system is softened to circulating water makeup water embrane method at normal water water source | |
| CN211546188U (en) | Integrated device for advanced treatment of fluorine-containing wastewater | |
| CN111704291A (en) | Efficient treatment system and treatment process for benzofuranone wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |