CN1513771A - Electrolytic treatment method of azodicarbonamide foaming agent waste water - Google Patents
Electrolytic treatment method of azodicarbonamide foaming agent waste water Download PDFInfo
- Publication number
- CN1513771A CN1513771A CNA021601186A CN02160118A CN1513771A CN 1513771 A CN1513771 A CN 1513771A CN A021601186 A CNA021601186 A CN A021601186A CN 02160118 A CN02160118 A CN 02160118A CN 1513771 A CN1513771 A CN 1513771A
- Authority
- CN
- China
- Prior art keywords
- waste water
- wastewater treatment
- cod
- electrolysis
- current density
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002351 wastewater Substances 0.000 title claims description 25
- 239000004156 Azodicarbonamide Substances 0.000 title claims description 7
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 title claims description 7
- 235000019399 azodicarbonamide Nutrition 0.000 title claims description 7
- 239000004088 foaming agent Substances 0.000 title claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 238000005868 electrolysis reaction Methods 0.000 claims description 20
- 238000004065 wastewater treatment Methods 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- KACAUYDQOUENGF-UHFFFAOYSA-N [Ta].[Ru].[Ir] Chemical compound [Ta].[Ru].[Ir] KACAUYDQOUENGF-UHFFFAOYSA-N 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000000247 postprecipitation Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 18
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 abstract description 7
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000000151 deposition Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 14
- 239000012267 brine Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 239000000975 dye Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 5
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000007844 bleaching agent Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 210000000582 semen Anatomy 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- QGZKDVFQNNGYKY-OUBTZVSYSA-N Ammonia-15N Chemical compound [15NH3] QGZKDVFQNNGYKY-OUBTZVSYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
An electrolytic process for treating the sewage of azodimethylamide includes depositing, regulating pH=5-11, pumping it in electrolyzer with non-diaphragm electrolyzer reactor using RuIrTi coated Ti plate as anode and activated ultralow-carbon stainless steel place as cathode, applying constant-current DC, and electrolyzing for 30-120 min. Its advantage is high effect to remove COD, ammoniacal nitrogen and hydrazine hydrate.
Description
Technical field
The invention belongs to the organic industrial sewage process field, particularly relate to a kind of electrolytic processing method of azodicarbonamide foaming agent waste water.
Background technology
In AC whipping agent (Cellmic C 121) production process, contain the pollutents such as COD, ammonia nitrogen and hydrazine hydrate of higher concentration in the waste water of discharge.Wherein the content of COD about 500-900mg/L, ammonia nitrogen content about 3000-4000mg/L, the content of hydrazine hydrate is about 15-20mg/L.In addition, the muriate and the sulfate radical that also contain higher concentration in the waste water.Because above-mentioned water quality specially, bring certain difficulty for the processing of waste water.These many people were carried out research, proposed various treatment processs,, all do not obtain the ideal treatment effect as treatment processs such as bleaching powder seminal fluid facture, neutralization-distillation method or blow-off method, crystallization-method of enrichment, photocatalytic oxidations.
" AC whipping agent Wastewater Treatment and application " (pollution prevention technique, 1999 the 3rd phases) introduced, and adopts the bleaching powder seminal fluid of AC whipping agent factory to make this waste water of oxidizer treatment.Bleaching powder seminal fluid main component is a Losantin, and Losantin is unstable in water, easily emits nascent state oxygen, and chlorine and nascent oxygen have very strong oxidation capacity, make the oxidation operation in the waste water, thereby reduces the COD value.Carrying out engineering test in Jiangsu AC whipping agent factory proves, the clearance of the COD of this waste water is 78.1%, and ammonia-N removal rate is 35.4%.This method major advantage is: treatment process is simple, handles the approach that adopts " waste recycling ", and reduced investment is applicable to the processing of chlor-alkali plant AC whipping agent factory effluent.The main drawback of this method is: in wastewater treatment process, because chlorine discharges, easily cause secondary pollution and equipment corrosion.In addition, not good to the ammonia nitrogen treatment effect.
Industrial, electrolysis process mainly is used in chlor-alkali industry.Because electrolysis has, and is drawn attention by people, also begins to use it for the processing of waste water in recent years.According to " progress of electrolytic process water technology " (chemical industry environmental protection, 2001,1 phase, 11～5) report, the major advantage of brine electrolysis treatment technology is: 1. the OH that produces in the process does not have the organic pollutant reaction in selectively direct and the waste water, it is degraded to dioxide, water and simple organic, does not have or seldom produce secondary pollution; 2. the energy efficiency height just can carry out at normal temperatures and pressures; 3. both can be used as the separate unit individual curing, can combine with other treatment processs again; 4. equipment and operate fairly simple.Abroad, the brine electrolysis treatment technology is also referred to as " environmental friendliness " technology.
Because above several aspects, the brine electrolysis treatment process has been used to the processing of waste water from dyestuff, reducing COD, decolouring, improves BOD
5Aspects such as/COD ratio demonstrate good effect, and are therefore selected as a kind of pretreatment process before the waste water from dyestuff biochemical treatment.CN1201760A discloses the report about " utilizing the waste water containing dye and the treatment process that contains pigment wastewater of heat energy " of one piece of Korea S, is exactly the application of brine electrolysis treatment process in dye wastewater treatment.But this piece report only relates to waste water containing dye and contains the processing of pigment wastewater, and its main inventive point is the decoloring ability that utilizes heat energy to improve electrolysis process and reaches the purpose that increases treatment capacity.
Summary of the invention
Purpose of the present invention is exactly by adopting the brine electrolysis treatment process, solves problems such as secondary pollution problem, equipment corrosion problem and ammonia nitrogen treatment effect in the Cellmic C 121 wastewater treatment process be not good.
The method that electrolytic process of the present invention is handled azodicarbonamide foaming agent waste water is achieved in that
The step of the electrolytic processing method of azodicarbonamide foaming agent waste water of the present invention is:
(1) waste water after adjusting pH is 5～11, preferred 5.7～10.6, enters electrolyzer through post precipitation;
What (2) electrolyzer adopted is the undivided cell reactor, chooses ruthenium-iridium-tantalum coated titanium plate and does anode, and Ultra-low carbon activation stainless steel plate is done negative electrode, and pole plate is spaced apart 3～10mm, and preferred polar plate spacing is 3mm;
(3) the constant current direct current that is provided by silicon controlled rectifier direct supply housing is provided pole plate, and control current density is 2450～6440A/m2, and preferred current density is 5550A/m
2Minimum pulse is spaced apart 0.1s.
(4) the electrolysis residence time is 30～120min.
After electrolysis treatment of the present invention, the COD of pollutent, ammonia nitrogen and hydrazine hydrate etc. can reach state sewage emission standard in the azodicarbonamide foaming agent waste water, even handle the degree that can't check.
Embodiment
Be described in further detail technical scheme of the present invention below in conjunction with embodiment.
In the electrolyzer of the present invention pole plate is housed because plate material and condition of surface have great effect to reaction, so choose corrosion-resistant, chlorine evolution potential is low, can bear the electrode of high current density.This research is chosen ruthenium-iridium-tantalum coated titanium plate and is done anode after screening, and Ultra-low carbon activation stainless steel plate is done negative electrode.
The constant current direct current that is provided by silicon controlled rectifier direct supply housing is provided pole plate.So-called constant current direct current is exactly to have rectification-alternating-current is become the current constant of direct current, constant current-maintenance output DC and the electric current of pulse-exportable pulsed current performance.Its minimum pulse is spaced apart 0.1s, and can be easily according to the different requirements of handling waste water, by regulating the size of electric current, the current density of conversion electrolytic pole board.
Principal pollutant analysis project: COD, ammonia nitrogen, hydrazine hydrate.
Embodiment 1-5
Embodiment 1-5 has illustrated the variation with electrolysis time of different current densities and COD clearance
Different current densities have bigger influence to the COD clearance, along with current density from 2450A/m
2To 6440A/m
2Increase, the reinforcement of electrolytic action, in the identical time, the COD clearance also increases thereupon, sees Table 1.
Different current densities of table 1 and COD clearance are with the variation of electrolysis time
| Embodiment | Current density, A/m 2 | ??COD | Electrolysis time, min | ||||
| ????0 | ????30 | ????60 | ????90 | ????120 | |||
| ????1 | ????2450 | Water outlet, mg/L | ????821 | ????808 | ????700 | ????592 | ????269 |
| Clearance, % | ????1.64 | ????14.75 | ????27.88 | ????67.2 | |||
| ????2 | ????3890 | Water outlet, mg/L | ????725 | ????430 | ????324 | ????213 | ????174 |
| Clearance, % | ????40.73 | ????55.25 | ????70.61 | ????75.92 | |||
| ????3 | ????4670 | Water outlet, mg/L | ????620 | ????384 | ????354 | ????177 | ????118 |
| Clearance, % | ????38.09 | ????42.08 | ????71.43 | ????80.95 | |||
| ????4 | ????5550 | Water outlet, mg/L | ????725 | ????483 | ????322 | ????188 | ????27 |
| Clearance, % | ????33.33 | ????55.55 | ????74.07 | ????96.32 | |||
| ????5 | ????6440 | Water outlet, mg/L | ????765 | ????490 | ????337 | ????165 | ????12 |
| Clearance, % | ????35.95 | ????55.95 | ????78.43 | ????98.43 |
Embodiment 6-8
Embodiment 6-8 represents different poles distance between plates and the COD clearance changing conditions with electrolysis time.
The more little electrolytic efficiency of spacing of theoretical electrolytic pole board is high more, but saliferous is higher in the waste water, and complicated component experiment showed, polar plate spacing when 3 ~ 10mm, and along with dwindling of polar plate spacing, in the identical time, the COD clearance also improves thereupon, sees Table 2.
Table 2 different poles distance between plates and COD clearance are with the variation of electrolysis time
| Embodiment | Polar plate spacing | Project | Electrolysis time, min | ||||||||
| ??0 | ??15 | ??30 | ??45 | ??60 | ??75 | ??90 | ??105 | ??120 | |||
| ??6 | ??10mm | Water outlet COD, mg/L | ??548 | ??434 | ??404 | ??350 | ??240 | ??204 | ??135 | ??30 | ??0 |
| The COD clearance, % | ??20. ??8 | ??26. ??3 | ??36. ??1 | ??56. ??2 | ??62. ??8 | ??75. ??4 | ??94. ??5 | ??100 ??.0 | |||
| ????7 | ????6mm | Water outlet COD, mg/L | ??556 | ??422 | ??412 | ??314 | ??220 | ??190 | ??95 | ??10 | ??0 |
| The COD clearance, % | ??24. ??1 | ??259 | ??43. ??5 | ??60. ??4 | ??65. ??8 | ??82. ??9 | ??98. ??2 | ??100 ??.0 | |||
| ????8 | ????3mm | Water outlet COD, mg/L | ??597 | ??433 | ??403 | ??284 | ??194 | ??149 | ??45 | ??0 | ??0 |
| The COD clearance, % | ??27. ??5 | ??32. ??5 | ??52. ??4 | ??67. ??5 | ??75. ??0 | ??92. ??5 | ??100 ??.0 | ??100 ??.0 | |||
Embodiment 9-11
Embodiment 9-11 explanation condition of different pH down with COD and ammonia nitrogen removal frank changing conditions with electrolysis time.See Table 3.
Table 3 condition of different pH down and COD and ammonia nitrogen removal frank over time
| Embodiment | ??pH | Project | Electrolysis time, min | ||||||||
| ??0 | ??15 | ??30 | ??45 | ??60 | ??75 | ??90 | ??105 | ??12 ??0 | |||
| ????9 | ??5.7 | Water outlet COD mg/L | ??597 | ??433 | ??403 | ??284 | ??194 | ??149 | ??45 | ??0 | ??0 |
| The COD clearance, % | ??27.5 | ??32.5 | ??52. ??4 | ??67. ??5 | ??75. ??0 | ??92. ??5 | ??100 | ??10 ??0 | |||
| The water outlet ammonia nitrogen, mg/L | ??339 ??8 | ??3265 | ??2839 | ??221 ??7 | ??159 ??4 | ??828 | ??48 | ??0 | ??0 | ||
| Ammonia nitrogen removal frank, % | ??3.9 | ??16.4 | ??34. ??8 | ??53. ??1 | ??75. ??6 | ??98. ??6 | ??100 | ??10 ??0 | |||
| ????10 | ??8.6 | Water outlet COD mg/L | ??537 | ??422 | ??375 | ??238 | ??186 | ??125 | ??34 | ??0 | ??0 |
| The COD clearance, % | ??21.4 | ??30.2 | ??55. ??7 | ??65. ??4 | ??76. ??7 | ??93. ??7 | ??100 | ??10 ??0 | |||
| The water outlet ammonia nitrogen, mg/L | ??354 ??5 | ??3509 | ??2972 | ??232 ??9 | ??159 ??4 | ??971 | ??166 | ??0 | ??0 | ||
| Ammonia nitrogen removal frank, % | ??1.0 | ??16.2 | ??34. ??3 | ??55. ??0 | ??72. ??6 | ??95. ??3 | ??100 | ??10 ??0 | |||
| ????11 | ??10.6 | Water outlet COD mg/L | ??567 | ??435 | ??388 | ??258 | ??199 | ??130 | ??41 | ??0 | ??0 |
| The COD clearance, % | ??23.3 | ??31.6 | ??54. ??5 | ??64. ??9 | ??77. ??1 | ??92. ??8 | ??100 | ??10 ??0 | |||
| The water outlet ammonia nitrogen, mg/L | ??324 ??3 | ??3198 | ??2792 | ??223 ??9 | ??124 ??4 | ??791 | ??110 | ??0 | ??0 | ||
| Ammonia nitrogen removal frank, % | ??1.4 | ??13.9 | ??31. ??0 | ??61. ??64 | ??75. ??6 | ??96. ??6 | ??100 | ??10 ??0 | |||
Embodiment 12
According to above result, under best electrolytic condition, current density is 5550A/m
2, polar plate spacing is 3mm, and pH is 5.7 o'clock, and the contaminant degradation rate sees Table 4 over time.
The best electrolytic condition contaminant degradation of table 4 rate over time
| Pollutent | Time, min | |||||||
| ??0 | ??15 | ????30 | ??45 | ??60 | ??75 | ??90 | ??105 | |
| ??COD，mg/L | ??597 | ??433 | ????403 | ??284 | ??194 | ??149 | ??45 | ??0 |
| The COD clearance, % | ??27.5 | ????32.5 | ??52. ??4 | ??67. ??5 | ??75. ??0 | ??92. ??5 | ??100 | |
| ??NH 3-N，mg/L | ??3398 | ??3265 | ????2839 | ??221 ??7 | ??159 ??4 | ??828 | ??48 | ??0 |
| ??NH 3-N clearance % | ??3.9 | ????16.4 | ??34. ??8 | ??53. ??1 | ??75. ??6 | ??98. ??6 | ??100 | |
| Hydrazine hydrate, mg/L | ??15.9 ??7 | ????0.16 | ??0 | |||||
| The hydrazine hydrate clearance, % | ????99.0 | ??100 ??.0 | ||||||
Claims (5)
1. the electrolytic processing method of an azodicarbonamide foaming agent waste water. the steps include:
(1) waste water after adjusting pH is 5～11, enters electrolyzer through post precipitation;
(2) the undivided cell reactor is adopted in electrolysis, chooses ruthenium-iridium-tantalum coated titanium plate and does anode, and Ultra-low carbon activation stainless steel plate is done negative electrode, and pole plate is spaced apart 3～10mm;
(3) the constant current direct current that is provided by silicon controlled rectifier direct supply housing is provided pole plate, and control current density is 2450～6440A/m2, and minimum pulse is spaced apart 0.1s;
(4) the electrolysis residence time is 30～120min.
2. method of wastewater treatment as claimed in claim 1 is characterized in that: described current density is 5550A/m
2
3. method of wastewater treatment as claimed in claim 1 is characterized in that: described polar plate spacing is 3mm.
4. method of wastewater treatment as claimed in claim 1 is characterized in that: described pH is 5.7～10.6.
5. method of wastewater treatment as claimed in claim 1 is characterized in that: described current density is 5550A/m
2Described polar plate spacing is 3mm; Described pH is 5.7～10.6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02160118 CN1212976C (en) | 2002-12-31 | 2002-12-31 | Electrolytic treatment method of azodicarbonamide foaming agent waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02160118 CN1212976C (en) | 2002-12-31 | 2002-12-31 | Electrolytic treatment method of azodicarbonamide foaming agent waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1513771A true CN1513771A (en) | 2004-07-21 |
| CN1212976C CN1212976C (en) | 2005-08-03 |
Family
ID=34237775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02160118 Expired - Lifetime CN1212976C (en) | 2002-12-31 | 2002-12-31 | Electrolytic treatment method of azodicarbonamide foaming agent waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1212976C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410193C (en) * | 2006-06-12 | 2008-08-13 | 江苏大学 | ADC foaming agent wastewater treatment method and integrated device |
| CN108314263A (en) * | 2018-02-28 | 2018-07-24 | 江苏大学 | A kind of ADC foaming agent condensed mother liquors treatment process |
-
2002
- 2002-12-31 CN CN 02160118 patent/CN1212976C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100410193C (en) * | 2006-06-12 | 2008-08-13 | 江苏大学 | ADC foaming agent wastewater treatment method and integrated device |
| CN108314263A (en) * | 2018-02-28 | 2018-07-24 | 江苏大学 | A kind of ADC foaming agent condensed mother liquors treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1212976C (en) | 2005-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105601039B (en) | A kind of method for the treatment of of Nitrobenzene class waste water | |
| JP4671743B2 (en) | Electrolytic treatment method and apparatus for wastewater containing ammonia nitrogen | |
| CN110642480B (en) | A method and system for landfill leachate treatment | |
| CN101723486A (en) | Method for treating salt-and-chlorine-contained wastewater | |
| Pattabhi et al. | Electrochemical degradation of reactive red 195 from its aqueous solution using RuO2/IrO2/TaO2 coated titanium electrodes | |
| CN105731604A (en) | Advanced treatment method for electroplating wastewater | |
| KR101046942B1 (en) | Water treatment method using electrolysis | |
| CN104140142A (en) | Coupling treatment method for fracturing flow-back fluid | |
| CN1212976C (en) | Electrolytic treatment method of azodicarbonamide foaming agent waste water | |
| KR102339425B1 (en) | Electrode plate for wastewater treatment and Nitrogen-based wastewater treatment system using the same, and Operation method thereof | |
| KR100492471B1 (en) | A continuous electrical analytic oxidation reactor of waste water with high concentrated nitrogen compound | |
| AU2006264553A1 (en) | Use of an anode for elimination or reduction of microbial impurities in liquids | |
| CN1796615A (en) | Method of cyclic electrolysis process in constant electric potential in use for purifying electroplating solution | |
| JPH07100466A (en) | Method for treating waste water | |
| CN1636895A (en) | Sludge stabilizing electrochemical treating process | |
| CN111995010B (en) | An electrochemical tubular treatment device and method for high-concentration cyanide-containing wastewater | |
| CN114108008A (en) | Method for preparing sodium hypochlorite by utilizing reverse osmosis concentrated water | |
| CN113213587A (en) | Device and method for treating formaldehyde-containing wastewater | |
| JP3788688B2 (en) | Method and apparatus for electrolytic treatment of oxidized nitrogen-containing water | |
| KR100556686B1 (en) | Nitrogen removal method of plating wastewater | |
| CN109179596A (en) | The processing method of electroplating wastewater | |
| JP5122074B2 (en) | Water treatment method and system | |
| KR102074447B1 (en) | Method for treating denitrification in water | |
| CN114620911A (en) | Electrochemical treatment method for heavy metals in sludge | |
| US4085014A (en) | Elimination of impurities from sea water cell feed to prevent anode deposits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20050803 |
|
| CX01 | Expiry of patent term |