CN105314762B - A kind of integrated conduct method of glyphosate waste water - Google Patents
A kind of integrated conduct method of glyphosate waste water Download PDFInfo
- Publication number
- CN105314762B CN105314762B CN201410375398.7A CN201410375398A CN105314762B CN 105314762 B CN105314762 B CN 105314762B CN 201410375398 A CN201410375398 A CN 201410375398A CN 105314762 B CN105314762 B CN 105314762B
- Authority
- CN
- China
- Prior art keywords
- aluminium
- phosphorus
- wastewater
- integrated conduct
- conduct method
- 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
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of integrated conduct method of glyphosate waste water, be by using diethanol amine as initiation material, the phosphorus-containing wastewater that the different process process of the IDA route glyphosate synthesis of the preparation process comprising dehydrogenation is produced and aluminium wastewater by interaction remove the pollutant factor.The method of the present invention is by adjusting the technical controlling main points such as optimization material ratio, pH and reaction temperature, replace dephosphorization agent to carry out dephosphorization generation phosphoric acid aluminum precipitation using sodium metaaluminate waste water to remove, the removal effect of phosphorus and aluminium can not only be preferably realized, and realize the purpose of the treatment of wastes with processes of wastes against one another.There is environment-friendly and its economized.
Description
Technical field
The invention belongs to glyphosate production process mother liquor recycling, harmless treatment field.
Background technology
Glyphosate is interior suction steriland herbicide, destructive to perennial weeds underground organization very strong, but is entered after soil
Lose activity, same day site preparation sowing, has no adverse effects to plant growth after medicine.Therefore it is widely used in tea place, mulberry field, fruit
Weeding before field sowing that garden, field of lying fallow, wheat, rape etc. are no-tillage, and the directed spraying of corn, cotton field in the ranks, for preventing and kill off almost
All annual or perennial weeds.
Preparing the technique of glyphosate at present has a lot, mainly there is glycine method and IDA methods.And IDA methods are increasingly becoming at present
Diethanolamine Dehydrogenation oxidation route is more considered as the route of most clean manufacturing in the trend of Future Development, IDA methods.
During diethanolamine method synthesizing glyphosate, skeletal copper catalyst preparation process used by Diethanolamine Dehydrogenation：Using
Sodium hydroxide solution is reacted with albronze, removes aluminium element therein to produce skeletal copper.Produced in dealumination process
A certain amount of aluminium wastewater, the waste water can not carry out biochemical discharge because aluminium content is higher.It is specific as follows：
Al+NaOH+H2O→NaAlO2+1.5H2↑
The processing for aluminium wastewater is generally mainly resource reutilization at present, and main utilization ways have as follows
Several directions：
1st, aluminium polychloride is prepared：
Because the aluminium wastewater main component is sodium metaaluminate, in addition containing a small amount of NaOH, polymerization chlorine is such as prepared
Substantial amounts of hydrochloric acid need to be added and neutralized by changing aluminium, then be concentrated again, desalination, the technique such as aging.During produce it is substantial amounts of
Still more dissolving sodium chloride is contained in industrial waste salt, and the polymeric aluminum chlorides solution produced.
The aluminium polychloride is used for wastewater treatment process again, needs to carry out readjustment PH using alkaloids in turn again
Value.Whole process not only wastes substantial amounts of soda acid resource and energy resource consumption.The secondary pollutions such as industrial waste salt can also be produced.
2nd, for preparing aluminum oxide：
Because aluminium content is relatively low (being less than 5%) in the aluminium wastewater, then waited by neutralizing, precipitating filtering, drying and dewatering
The alumina production cost that journey is produced is higher, without economy.And the brine waste that process is produced can equally produce secondary dirt
Dye.
It is also well known that a key character pollution factor in glyphosate waste water is total phosphorus.Glyphosate waste water is in warp
The total phosphorus crossed after pretreatment and biochemical treatment is typically extremely difficult to the requirement less than 8ppm, at present both at home and abroad to the biochemical waste water
Typically using dephosphorization process be mainly dosing precipitation filtering by the way of.Medicament mainly includes：Poly-ferric chloride, polyaluminum sulfate
Iron, aluminium polychloride or mixture etc., although treatment effect can reach requirement, weak point be add in waste water it is more
The anion such as chlorion, sulfate radical, and increase medicament use cost.It is mostly acid medicine additionally, due to the medicament used, place
Waste water after reason, which still needs, to be adjusted after pH value and can be discharged using more alkaline material, further increases place
Manage cost.
From the point of view of above-mentioned technology contrast situation, contamination characteristics factor aluminium and phosphorus in above two waste water can essentially
Progress interacts to form precipitation, so as to realize the purpose mutually handled.Only need to find a suitable process route,
The clearance of two kinds of characterization factors is set to reach peak.In order to reach this purpose, on the basis of lot of experiments, we realize
Following invention.
The content of the invention
It is an object of the invention to：A kind of economized comprehensive processing technique of new glyphosate waste water is proposed, can be passed through
Gentle handling process produces the aluminium wastewater produced in Diethanolamine Dehydrogenation catalyst preparation process and glyphosate production process
Raw phosphorous biochemical waste water carries out interaction generation phosphalugel precipitation under certain condition, so as to realize dephosphorization except aluminium together
The effect of removal.
The present invention above-mentioned purpose be achieved through the following technical solutions, the percentage composition used in this specification without
Special instruction is weight/mass percentage composition：
There is provided a kind of economized integrated conduct method of glyphosate waste water, be by by initiation material of diethanol amine,
The waste water that the different process process of the IDA route glyphosate synthesis of preparation process comprising dehydrogenation is produced, by mutual
Effect removes the pollutant factor, and the integrated conduct method includes herein below and step：
1. the Waste produced with the aluminium wastewater of Diethanolamine Dehydrogenation catalyst preparation process and glyphosate production process
The phosphorus-containing wastewater that water is obtained after pretreatment, biochemical treatment is to handle in raw material, described aluminium wastewater in terms of aluminium ion
Aluminium content is 1%~5%, and sodium hydrate content is 0.2%~1%；In described phosphorus-containing wastewater total phosphorus content be 50~
200mg/L, COD are 500~1000mg/L；
2. two kinds of waste water interaction processing procedure：By step, 1. described phosphorus-containing wastewater is mixed with aluminium wastewater and hydrochloric acid
Close, more than 0.2hr is reacted under conditions of 0~50 DEG C, reaction system pH is 5.0~8.0 for control；
3. flocculant is added into step 2. reacted material, is flocculated, settled, filtered；The filtrate finally given
Middle total phosphorus residual quantity is less than 8mg/L, and aluminium element residual quantity is less than 10mg/L, and COD residual quantities are less than 400mg/L, reaches discharge mark
It is accurate.
Wherein 2. described interaction processing procedure can be a kind of process of batch process processing to step, specifically include：
First by step, 1. described phosphorus-containing wastewater adjusts pH to 3~5 using hydrochloric acid, then adds step 1. described aluminium wastewater regulation
System pH is to 5.0~8.0, and in 0~50 DEG C of scope insulation more than 0.2hr, during still needed to finely tune pH value according to response situation,
Untill pH is constant.In this step, by hydrochloric acid and phosphorus-containing wastewater blended sliver pH, then processing method of the present invention selection is first
Mixed again with aluminium wastewater, thus obtained treatment effect is ideal；As first hydrochloric acid mixed with aluminium wastewater, then with it is phosphorous
Biochemical waste water is mixed, then treatment effect is substantially reduced.
Wherein 2. described interaction processing procedure can also be a kind of process of serialization oxidative treatment to step, have
Body includes：In the stirring container that a residence time reaches more than 0.2hr, under the conditions of 0~50 DEG C, while adding step 1. institute
The phosphorus-containing wastewater and aluminium wastewater stated, and hydrochloric acid tune system pH all-the-time stables are continuously added in 5.0~8.0, continuous feed, discharging
Water outlet more than more than 1hr reaches processing requirement.
Wherein step 2. described in pH value be preferably controlled in 5.8~6.6, optimal is 6.0~6.4.
Wherein step 2. described in reaction temperature be preferably 10~35 DEG C.
Wherein step 2. described in phosphorus-containing wastewater and aluminium wastewater ratio with the aluminium element and P elements in reaction system
Between mol ratio meters, its ratio with 1/1~5/1 preferably, more excellent is 1/1~2/1.
Wherein step 3. described in flocculant can be anionic, cationic or nonionic, preferred cationic type；
Flocculant amount used is preferably 5~20ppm of overall reaction system.
Compared with prior art, the method for the present invention is by adjusting the technology controls such as optimization material ratio, pH and reaction temperature
Main points processed, replace dephosphorization agent to carry out dephosphorization generation phosphoric acid aluminum precipitation and remove using sodium metaaluminate waste water, can not only be preferably real
The removal effect of existing phosphorus and aluminium, and realize the purpose of the treatment of wastes with processes of wastes against one another.There is environment-friendly and its economized.
Embodiment
With reference to embodiments, the present invention is described in detail, to more fully understand present disclosure, specifically such as
Under：
The technique waste water for taking glyphosate production process to produce, the phosphorus-containing wastewater after pretreatment, biochemical treatment (referred to as contains
Phosphorus waste water, similarly hereinafter), it is 850mg/L through analyzing total phosphorus 102mg/L, COD.Take the aluminium wastewater (letter of dehydrogenation preparation process
Claim aluminium wastewater, similarly hereinafter), contain aluminium 4.53%, NaOH 0.76% through analysis.
Batch process method
Embodiment 1：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 2.5g under 20 DEG C of stirrings, PH=4.2 is adjusted.At such a temperature
Above-mentioned aluminium wastewater is gradually added into, and is incubated 35min, terminal PH=6.15, consumption aluminium wastewater 3.4g is maintained.Add under stirring
Enter 0.3% cationic PAM (polyacrylamide) flocculant aqueous solution 3.5g, continue to stir after 5min standing, it is a certain amount of heavy
Form sediment.Clear liquid is taken to analyze wherein aluminium element content 1.8ppm after toppling over filtering, total phosphorus 4.5mg/L, COD are 312mg/L, chlorion
Content 0.08%.98.8% is reached according to aluminium element clearance is calculated, total tp removal rate reaches that 95.5%, COD clearances reach
63.3%.
Embodiment 2~8：
Process of the test and embodiment 1 are basically identical, and the optimization and its interpretation of result for technical controlling point are specific such as table 1：
Table 1：The test data of embodiment 2~8 is counted
Embodiment 9：
Phosphorus-containing wastewater 1000g is taken, in adding above-mentioned aluminium wastewater 3.5g under 20 DEG C of stirrings, now PH=9.6.At this
At a temperature of be gradually added into 30% hydrochloric acid, and be incubated 35min, maintain terminal PH=6.28, hydrochloric acid 2.4.Added under stirring
0.3% PAM aqueous solution 3.5g, continue to stir after 5min standing, a certain amount of precipitation.Clear liquid analysis is taken after toppling over filtering wherein
Aluminium element content 17.55ppm, total phosphorus 14.1mg/L, COD are 503mg/L, chloride ion content 0.08%.According to calculating aluminium element
Clearance reaches 88.83%, and total tp removal rate reaches that 85.9%, COD clearances reach 40.82%.
Embodiment 10：
2.5g hydrochloric acid is mixed in advance with 3.4g aluminium wastewaters, is now had more white precipitate to produce, is taken phosphorus-containing wastewater
1000g, in mixed under 20 DEG C of stirrings.Continue to be incubated 35min, terminal PH=5.88 at such a temperature.Stirring
The PAM aqueous solution 3.5g of lower addition 0.3%, continue to stir after 5min standing, a certain amount of precipitation.Clear liquid point is taken after toppling over filtering
Wherein aluminium element content 1.7ppm is analysed, total phosphorus 21.8mg/L, COD are 611mg/L, chloride ion content 0.08%.According to calculating aluminium
Element clearance reaches 98.87%, and total tp removal rate reaches that 78.48%, COD clearances reach 28.12%.
Embodiment 11：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 2.5g under 20 DEG C of stirrings, PH=4.2 is adjusted.At such a temperature
Above-mentioned aluminium wastewater is gradually added into, and is incubated 35min, terminal PH=6.17, consumption aluminium wastewater 3.4g is maintained.Add under stirring
Enter 0.3% anionic flocculant aqueous solution 3.5g, continue stir 5min after stand, a certain amount of precipitation.After toppling over filtering
Clear liquid is taken to analyze wherein aluminium element content 3.7ppm, total phosphorus 10.35mg/L, COD are 354mg/L, chloride ion content 0.08%.Root
97.6% is reached according to aluminium element clearance is calculated, total tp removal rate reaches that 89.8%, COD clearances reach 58.5%.
Embodiment 12：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 2.5g under 20 DEG C of stirrings, PH=4.3 is adjusted.At such a temperature
Above-mentioned aluminium wastewater is gradually added into, and is incubated 35min, terminal PH=6.09, consumption aluminium wastewater 3.4g is maintained.Add under stirring
Enter 0.3% flocculant in non-ion type aqueous solution 3.5g, continue stir 5min after stand, a certain amount of precipitation.After toppling over filtering
Clear liquid is taken to analyze wherein aluminium element content 7.9ppm, total phosphorus 12.5mg/L, COD are 401mg/L, chloride ion content 0.08%.Root
94.8% is reached according to aluminium element clearance is calculated, total tp removal rate reaches that 87.7%, COD clearances reach 53%.
Embodiment 13：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 1.5g under 20 DEG C of stirrings, PH=5.2 is adjusted.At such a temperature
Polyaluminium water solution is gradually added into, and is incubated 35min, terminal PH=4.2, consumption poly-ferric chloride 5.2g is maintained.Stir shape
The cationic PAM aqueous solution 3.5g of addition 0.3% under state, continue to stir after 5min standing, a certain amount of precipitation.Through toppling over filtering
After take clear liquid analyze wherein iron content 28.9ppm, total phosphorus 21.84mg/L, COD are 489mg/L, chloride ion content
0.19%.According to calculating, total tp removal rate is that 78.36%, COD clearances are 41.86%.
Embodiment 14：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 2.5g under 20 DEG C of stirrings, PH=4.33 is adjusted.In the temperature
Under be gradually added into above-mentioned aluminium wastewater, and be incubated 35min, maintain terminal PH=6.14, consumption aluminium wastewater 3.4g.Under stirring
The PSAA aqueous solution 1g of addition 4%, continue to stir after 5min standing, a certain amount of precipitation.Clear liquid is taken to analyze it after toppling over filtering
Middle aluminium element content 8.9ppm, total phosphorus 14.1mg/L, COD are 412mg/L.94.2% is reached according to aluminium element clearance is calculated,
Total tp removal rate reaches that 86.1%, COD clearances reach 51.2%.
Embodiment 15：
Phosphorus-containing wastewater 1000g is taken, in adding 30% hydrochloric acid 2.7g under 20 DEG C of stirrings, PH=4.04 is adjusted.In the temperature
Under be gradually added into above-mentioned aluminium wastewater, and be incubated 35min, maintain terminal PH=6.05, consumption aluminium wastewater 3.3g.Under stirring
The PSF aqueous solution 1g of addition 4%, continue to stir after 5min standing, a certain amount of precipitation.Clear liquid analysis is taken after toppling over filtering wherein
Aluminium element content 23.7ppm, total phosphorus 7.7mg/L, COD are 379mg/L.84.1% is reached according to aluminium element clearance is calculated, always
Tp removal rate reaches that 92.4%, COD clearances reach 55.1%.
Continuous treatment method：
Embodiment 16：
The clear liquid 800g added in 1000ml overflow beaker after being handled in embodiment 1, in equal under 20 DEG C, stirring
It is even it is continuous added into beaker phosphorus-containing wastewater (flow is with 1000g/hr), aluminium wastewater (3.5g/hr, it is dilute using proper amount of clear water
Release rear feeding), and hydrochloric acid is added dropwise, system PH=6.0~6.4 are remained, 5hr is continuously run.Water outlet be proportionally added into sun from
After subtype PAM flocculant process.Analyze its index table 2 specific as follows：
Table 2
Claims (10)
1. a kind of integrated conduct method of glyphosate waste water, it is characterised in that：By it is by initiation material of diethanol amine, comprising de-
The waste water that the different process process of the IDA route glyphosate synthesis of the preparation process of hydrogen catalyst is produced, goes by interaction
The depollution thing factor；The integrated conduct method comprises the following steps：
1. the technique waste water produced with the aluminium wastewater of Diethanolamine Dehydrogenation catalyst preparation process and glyphosate production process is passed through
The phosphorus-containing wastewater obtained after pretreatment, biochemical treatment is crossed to handle the aluminium in raw material, described aluminium wastewater in terms of aluminium ion to contain
Measure as 1%~5%, sodium hydrate content is 0.2%~1%；Total phosphorus content is 50~200mg/L in described phosphorus-containing wastewater,
COD is 500~1000mg/L；
2. two kinds of waste water interaction processing procedure：By step 1. described phosphorus-containing wastewater and aluminium wastewater and mixed in hydrochloric acid,
More than 0.2hr is reacted under conditions of 0~50 DEG C, reaction system pH is 5.0~8.0 for control；
3. flocculant is added into step 2. reacted material, is flocculated, settled, filtered；It is total in the filtrate finally given
Phosphorus residual quantity is less than 8mg/L, and aluminium element residual quantity is less than 10mg/L, and COD residual quantities are less than 400mg/L, reach discharge standard.
2. the integrated conduct method described in claim 1, it is characterised in that：2. described interaction processing procedure is one to step
The process of batch process processing is planted, is specifically included：First by step, 1. described phosphorus-containing wastewater adjusts pH to 3~5, Ran Houzai using hydrochloric acid
Adding step, 1. described aluminium wastewater regulation system pH is to 5.0~8.0, and in 0~50 DEG C of scope insulation more than 0.2hr, mistake
Fine setting pH value is still needed to according to response situation in journey, untill pH is constant.
3. the integrated conduct method described in claim 1, it is characterised in that：2. described interaction processing procedure is one to step
The process of serialization oxidative treatment is planted, is specifically included：In the stirring container that a residence time reaches more than 0.2hr, in 0~
Under the conditions of 50 DEG C, while add step 1. described phosphorus-containing wastewater and aluminium wastewater, and it is continuously added to hydrochloric acid and adjusts system pH all the time
Stabilization is 5.0~8.0, and the water outlet of continuous feed, discharging more than more than 1hr reaches processing requirement.
4. the integrated conduct method described in claim 1, it is characterised in that：2. the pH value is controlled 5.8~6.6 step.
5. the integrated conduct method described in claim 1, it is characterised in that：2. the pH value is controlled 6.0~6.4 step.
6. the integrated conduct method described in claim 1, it is characterised in that：2. the reaction temperature is 10~35 DEG C to step.
7. the integrated conduct method described in claim 1, it is characterised in that：Step 2. described in phosphorus-containing wastewater and aluminium wastewater
Ratio is 1 in terms of the mol ratios between the aluminium element and P elements in reaction system:1~5:1.
8. the integrated conduct method described in claim 1, it is characterised in that：Step 2. described in phosphorus-containing wastewater and aluminium wastewater
Ratio is 1 in terms of the mol ratios between the aluminium element and P elements in reaction system:1~2:1.
9. the integrated conduct method described in claim 1, it is characterised in that：Step 3. described in flocculant for anionic,
Cationic or nonionic.
10. the integrated conduct method described in claim 9, it is characterised in that：Described flocculant is cationic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375398.7A CN105314762B (en) | 2014-07-31 | 2014-07-31 | A kind of integrated conduct method of glyphosate waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410375398.7A CN105314762B (en) | 2014-07-31 | 2014-07-31 | A kind of integrated conduct method of glyphosate waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105314762A CN105314762A (en) | 2016-02-10 |
| CN105314762B true CN105314762B (en) | 2017-07-11 |
Family
ID=55243195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410375398.7A Active CN105314762B (en) | 2014-07-31 | 2014-07-31 | A kind of integrated conduct method of glyphosate waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105314762B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019005718A1 (en) | 2017-06-26 | 2019-01-03 | Monsanto Technology Llc | Phosphorus control for waste streams from glyphosate manufacturing processes |
| CN111592154B (en) * | 2020-06-02 | 2022-10-14 | 江苏扬农化工集团有限公司 | Treatment method and device for epoxy resin production wastewater |
| CN112744960A (en) * | 2021-03-02 | 2021-05-04 | 上海玉畔环保科技有限公司 | Pretreatment system and method for aluminum and aluminum alloy anodic oxidation phosphorus-containing wastewater |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180535A (en) * | 2011-03-25 | 2011-09-14 | 中国科学院南京土壤研究所 | Method for removing phosphorus in organophosphorus pesticide waste water by using metal compound complex mineral material |
| CN102775012A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for removing high concentration phosphorus in glyphosate wastewater |
| CN103523887A (en) * | 2013-09-29 | 2014-01-22 | 贾冬梅 | Treatment method for glyphosate wastewater |
| JP5501544B1 (en) * | 2014-01-30 | 2014-05-21 | 株式会社テクノス北海道 | Flocculant for wastewater treatment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7828976B2 (en) * | 2007-06-22 | 2010-11-09 | I. Kruger, Inc. | Method of removing phosphorus from wastewater |
-
2014
- 2014-07-31 CN CN201410375398.7A patent/CN105314762B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180535A (en) * | 2011-03-25 | 2011-09-14 | 中国科学院南京土壤研究所 | Method for removing phosphorus in organophosphorus pesticide waste water by using metal compound complex mineral material |
| CN102775012A (en) * | 2012-07-18 | 2012-11-14 | 常州大学 | Method for removing high concentration phosphorus in glyphosate wastewater |
| CN103523887A (en) * | 2013-09-29 | 2014-01-22 | 贾冬梅 | Treatment method for glyphosate wastewater |
| JP5501544B1 (en) * | 2014-01-30 | 2014-05-21 | 株式会社テクノス北海道 | Flocculant for wastewater treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105314762A (en) | 2016-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Guadie et al. | Enhanced struvite recovery from wastewater using a novel cone-inserted fluidized bed reactor | |
| Jordaan et al. | Phosphorus removal from anaerobically digested swine wastewater through struvite precipitation | |
| Telzhensky et al. | Selective separation of seawater Mg2+ ions for use in downstream water treatment processes | |
| KR101093557B1 (en) | Method for treating phosphorus and nitrogen comprised in sewage or wastewater using iron ore wastewater | |
| CN102491562A (en) | High-ammonia-nitrogen waste water resource recovery technology | |
| CN105314762B (en) | A kind of integrated conduct method of glyphosate waste water | |
| CN100393636C (en) | Process for treating waste water of high concentration containing phosphorus | |
| CN110510768A (en) | The combination treatment method of chemical nickle-plating wastewater | |
| CN108218129A (en) | The processing method of chemical nickle-plating wastewater | |
| CN105350084A (en) | Surface modification method for calcium sulfate whiskers | |
| CN109095642A (en) | A kind of alkalinity erosion copper waste liquid environmental protection recovery process of zero-emission | |
| Lew et al. | Favorable operating conditions for obtaining high-value struvite product from sludge dewatering filtrate | |
| Lavanya et al. | Phosphate recovery from swine wastewater by struvite precipitation and process optimization using response surface methodology | |
| CN107265696A (en) | A kind of desulfurization wastewater sofening treatment device and method | |
| JP2008237947A (en) | Ion-containing wastewater treatment apparatus and method | |
| CN104261443A (en) | Process for calcium-method production of magnesium hydrate by using nanofiltration membrane | |
| CN108892302A (en) | The integrated conduct method of Prochloraz production waste water | |
| JP2006142301A (en) | Method and equipment for treating phosphorus-containing water | |
| CN105293614B (en) | A kind of method that Phosphorus From Wastewater is removed using flyash | |
| CN108977823A (en) | A kind of nitrogen phosphorus fluorine recovery method based on electrochemical reactor | |
| CN111635086A (en) | Zero discharge system for producing ammonium salt from ammonia nitrogen-containing wastewater and treatment process thereof | |
| CN107416863A (en) | The method that the waste water of ferric phosphate production prepares technical grade ammonium salt | |
| CN100396599C (en) | Method for producing phosphorous acid and gypsum using hydrochloric acid method | |
| CN105439319A (en) | Incineration wastewater treatment method | |
| SE447370B (en) | DEVICE AND PROCEDURE FOR CHEMICAL CONDITIONING OF SLAM |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |