CN103833166A - Methyldiethanolamine (MDEA) industrial wastewater treatment method - Google Patents
Methyldiethanolamine (MDEA) industrial wastewater treatment method Download PDFInfo
- Publication number
- CN103833166A CN103833166A CN201210482462.2A CN201210482462A CN103833166A CN 103833166 A CN103833166 A CN 103833166A CN 201210482462 A CN201210482462 A CN 201210482462A CN 103833166 A CN103833166 A CN 103833166A
- Authority
- CN
- China
- Prior art keywords
- waste water
- reactor
- iron
- wastewater
- methyldiethanolamine
- 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
Images
Abstract
The present invention relates to a methyldiethanolamine (MDEA) industrial wastewater treatment method, which comprises: (1) adding MDEA industrial wastewater to a reactor, and adjusting the pH value of the wastewater to 2-5; (2) adding an iron-carbon material to the reactor, and concurrently carrying out aeration on the wastewater; (3) adding hydrogen peroxide when the pH value of the wastewater is 4; (4) introducing the completely-mixed wastewater into a coagulation sedimentation tank while adding an alkaline coagulation agent, adjusting the pH value to 9, and carrying out coagulation sedimentation; and (5) adding an oxidizing agent sodium hypochlorite, introducing the wastewater to a deodorization reactor, and further carrying out a reaction to promote COD removal or reduction. According to the method, the iron-carbon micro-electrolysis technology and the Fenton-like oxidation technology are combined, the hydrogen peroxide is adopted as the chemical auxiliary agent to synergistically promote the iron-carbon micro-electrolysis process of the MDEA industrial wastewater, the pH value adjustment and the conventional coagulation technology are combined, the COD removal rate of the MDEA wastewater can be more than 90%, and the effluent can achieve the national chemical industry wastewater first-order discharge standard.
Description
Technical field
The present invention relates to green technology, be specifically related to the process for treating industrial waste water that contains methyldiethanolamine.
Background technology
N methyldiethanol amine (also referred to as methyl glycol amine, being abbreviated as MDEA) is a kind of tertiary amines material.Molecular formula is CH
3n (CH
2cH
2oH)
2, molecular weight is 119.16, proportion 1.0418, and 247 DEG C of boiling points, the viscosity in the time of 12 DEG C is 101cP, 48 DEG C of Ning Gu Dian –, can be all soluble in water.
At present, methyldiethanolamine is used widely as desulfurization solvent in selexol process, gasification desulfurization and refinery's desulfurization.MDEA is to H
2s has very high selectivity and lower energy consumption, is used to Crouse's unstripped gas concentrate, Scott method vent gas treatment, the processes such as low heating value gas desulfurization.
MDEA also has unique distinction on synthetic ammonia decarbonization process.The absorption CO of MDEA
2consuming energy with regeneration is low compared with monoethanolamine (MEA), and it is as extremely low in the solubleness of hydrogen, nitrogen, methyl alcohol, methane and other higher hydrocarbons compounds to non-polar gas, and self loses seldom.MDEA and CO
2reaction only generates supercarbonate and does not generate carbamate, and absorption process is non-degradable, and daily magnitude of recruitment greatly reduces.
Methyldiethanolamine is used in a large number as emulsifying agent, acid gas absorbent, soda acid control agent, polyurethane foam catalyzer.It can remove carbonic acid gas and the hydrogen sulfide in synthetic ammonia under activator booster action.But, in production application process, the life-time service of MDEA can cause heat exchanger tube fouling, produces large number of biological foundry loam, not only equipment is caused to corrosion, and causes pipe leakage, and impact is produced.
MDEA has soluble in water, is difficult for being adsorbed, and difficult for biological degradation, has the features such as certain toxicity to microorganism.The trade effluent that this contains MDEA adopts absorption method, oxidation style, flocculence and biological process etc. almost not to have effective effect.
Summary of the invention
The inventor finds through research, for the waste water that contains methyldiethanolamine, by in same reactor, drop into successively iron carbon material and (class) Fenton's reaction material, via iron-carbon micro-electrolysis and (class) Fenton's reaction, effectively methyldiethanolamine is removed in degraded, and then drop into successively alkaline coagulating agent and oxygenant, via coagulating and oxidizing reaction, effectively iron ion and the remaining organic substance in removal system, thereby remove expeditiously the methyldiethanolamine in waste water, and then complete the present invention.
The treatment process that the object of the present invention is to provide a kind of methyldiethanolamine trade effluent, the method comprises the following steps:
(1) methyldiethanolamine trade effluent is dosed in reactor, regulating wastewater pH is 2～4;
(2) in reactor, add iron carbon material, waste water is carried out to aeration simultaneously, methyldiethanolamine waste water can fully be contacted with iron carbon, and the variation of the interior reaction system p H of Real-Time Monitoring reactor;
(3) in the time that the pH of waste water in reactor is 4-5, in the waste water in reactor, add oxidants hydrogen peroxide with the ratio of 0.1-5%, fully mix;
(4) abundant mixed waste water is incorporated into coagulant precipitation groove, adds alkaline coagulating agent simultaneously, adjusting pH is 9-13, carries out coagulant precipitation;
(5) for the waste water carrying out after coagulant precipitation, add wherein oxygenant clorox, then waste water is introduced into deodorizing reactor, further reaction, promotes removal or the reduction of COD.
According to the inventive method, can effectively solve methyldiethanolamine waste water and be difficult to a difficult problem of effectively processing, the method simple possible, effectively degrading high concentration methyldiethanolamine, cost is low, consumes lowly, and reaction material can repeatedly reuse.Particularly, the present invention has the following advantages:
(1) in the method according to the invention, with iron-carbon micro-electrolysis technical finesse methyldiethanolamine waste water, the raw material that utilizes the iron ion producing in reaction process to react as follow-up (class) Fenton oxidation, both promoted the efficient degradation of methyldiethanolamine Pollutants in Wastewater, greatly reduce again the usage quantity of reaction mass, save processing cost;
(2) in the method according to the invention, iron-carbon micro-electrolysis reaction is carried out with reacting in same reactor of methyldiethanolamine of (class) Fenton oxidation processing, and technical process is simple, and processing efficiency is high;
(3) in the method according to the invention, after iron-carbon micro-electrolysis and (class) fragrant oxidizing reaction, directly add a small amount of alkaline coagulating agent, can interact enhanced flocculation effect occurs with the iron ion that produces in micro-electrolysis reaction, can play again the effect that regulates reaction system pH;
(4) in the method according to the invention, the combination process of iron-carbon micro-electrolysis reaction, the reaction of (class) Fenton oxidation and coagulating, makes methyldiethanolamine waste water after treatment can reach deodorizing and object up to standard after hypochlorite oxidation is processed;
(5) in the method according to the invention, for iron-carbon micro-electrolysis and (class) Fenton oxidation combination process, can carry out plural serial stage use, can process high density methyldiethanolamine trade effluent, also can process lower concentration methyldiethanolamine trade effluent;
(6) according to the Technology of iron-carbon micro-electrolysis provided by the invention and (class) Fenton oxidation materialization combined treatment methyldiethanolamine trade effluent can with other water technology couplings.
Brief description of the drawings
Fig. 1 shows process flow diagram according to the preferred embodiment of the present invention.
description of reference numerals
1-waste water storage tank
2-aerating apparatus
3-pH on-line monitoring instrument
The 4-volume pump that feeds in raw material
5-coagulant precipitation groove
The 6-volume pump that feeds in raw material
The 7-volume pump that feeds in raw material
8-deodorizing reactor
Embodiment
Below in conjunction with accompanying drawing, by illustrative embodiments, the present invention is described in detail.The features and advantages of the invention will become more explicit along with these explanations.
Here special word " exemplary " means " as example, embodiment or illustrative ".Here needn't be interpreted as being better than or being better than other embodiment as " exemplary " illustrated any embodiment.Although the various aspects of embodiment shown in the drawings, unless otherwise indicated, needn't draw accompanying drawing in proportion.
In the method according to the invention, the effect of step (1) is the pH regulator of pending waste water to suitable scope of carrying out iron-carbon micro-electrolysis reaction, to carry out smoothly iron-carbon micro-electrolysis reaction, iron ion is provided, and then is that providing smoothly of follow-up (class) Fenton's reaction is basic.
In a preferred embodiment, in step (1), regulating wastewater pH is 2.5～4, more preferably 3～4, and also 3 left and right more preferably from about.
As reactor, in practice, can adopt waste water storage tank, can save like this stream of pending waste water, so that cost-saving.
In the method according to the invention, the effect of step (2) is to carry out iron-carbon micro-electrolysis reaction, thereby iron ion is provided.
According in the step of the inventive method (2), as iron carbon material, the part by weight of iron and carbon is 1: 1-1: in 5 scopes, preferably iron carbon weight ratio is 1:1.For this iron carbon material, can use iron carbon dust or particle, preferably use powder.
According in the step of the inventive method (2), aeration can make waste water fully contact with iron carbon, thereby promotes the carrying out of micro-electrolysis reaction.
In literary composition, the meaning of term used " aeration " refers to pending waste water is fully contacted with air, promotes airborne oxygen to be dissolved in pending waste water.
The object of aeration is the dissolved oxygen increasing in waste water, and enhancing iron carbon contacts with MDEA waste water, is conducive to the carrying out of reaction.Aeration contributes to strengthen micro-electrolysis reaction process, promotes carrying out fast of reaction.In practice, in order to carry out aeration, can adopt aerating apparatus, mention for example jetted self-priming air type aerating apparatus.The preferred 1-10 hour of aeration time, more preferably 2-4 hour.
According in the step of the inventive method (2), by the variation of reaction system pH in Real-Time Monitoring reactor, can check the degree that monitoring micro-electrolysis reaction carries out.Abundant experimental results shows, when the pH of reaction system is changed to 3.5-5.0,, is suitable for carrying out follow-up (class) Fenton's reaction at preferably approximately 4 o'clock.
For the pH of Real-Time Monitoring system changes, can use pH on-line monitoring instrument.
In the method according to the invention, the effect of step (3) is to carry out smoothly (class) Fenton's reaction, with the methyldiethanolamine of degrading in removal system.
According in the step of the inventive method (3), the system pH that is suitable for carrying out (class) Fenton's reaction is approximately 4 left and right, now, to the ratio with 0.1-5% by volume in system, preferably approximately 1.5% ratio is added oxidants hydrogen peroxide, to carry out (class) Fenton's reaction.
In a preferred embodiment, the time of carrying out (class) Fenton's reaction in step (3) is 2-6 hour, preferably 3-4 hour, more preferably 3.5-4 hour.At this moment, in scope, can guarantee that (class) Fenton's reaction carries out completely, not wasting the reaction times again.
In the method according to the invention, the effect of step (4) is the iron ion in coagulant precipitation system, and the pH value of regulation system simultaneously, to carry out follow-up oxide treatment.
According in the step of the inventive method (4), as alkaline coagulating agent, mention such as calcium oxide, sodium hydroxide, potassium hydroxide and sheet alkali etc.Can use wherein any, or be used in combination multiple.
In the method according to the invention, the effect of step (5) is further to remove the organic substance in system, thereby removes stink, and water quality is reached can emission standard.
In a preferred embodiment, for the waste water carrying out after coagulant precipitation, first separate, separate after lower sediment, add again oxygenant clorox, ozone or chlorine water, preferably clorox, this is because clorox is except there being oxygenizement also to have deodouring effect concurrently.Preferably, the addition of oxygenant clorox is liquid volume 1/4000.
In practice, can adopt process route chart as shown in Figure 1 to implement method of the present invention.Pending waste water is stored in or is introduced in waste water storage tank, regulate the pH of waste water to desired value, then aeration under the effect of aerating apparatus, and add iron carbon dust to carry out micro-electrolysis reaction, by the pH of pH on-line monitoring instrument Real-Time Monitoring system, in the time that the pH of system is 4, in system, add hydrogen peroxide to carry out (class) Fenton's reaction, reacted waste water is entered in coagulant precipitation groove, add alkaline coagulating agent, carry out coagulant precipitation regulation system pH, then upper strata waste water is introduced in deodorizing reactor, add wherein oxygenant clorox, carry out deodorizing.
Further describe the present invention by exemplary example below.
1000mL methyldiethanolamine waste water is put into the there-necked flask of 2000mL, the COD=1000mg/L of this methyldiethanolamine waste water, regulates pH to 3, under the condition of aeration, add 1g iron carbon dust, wherein, iron carbon dust is from the Wu Xihai green technology Engineering Co., Ltd of speeding, production code member: HCW-007, (wherein iron is 0.49kg, carbon is 0.49kg), open peristaltic pump simultaneously, make waste water circulation, pH meter probe is placed in reaction soln middle part, the variation of monitoring pH.In the time that pH is 4, be 30% superoxol 15mL to adding concentration in reactor, continue reaction 4h.After reaction finishes, leave standstill, supernatant liquor adds calcium oxide, regulates pH to 9, and coagulating sedimentation filters and obtains supernatant liquor, final outflow water COD=48mg/L after interpolation clorox, and COD clearance reaches 98.1%.
In reactor, introduce the methyldiethanolamine waste water that 500L COD is 1000mg/L, regulate wastewater pH to 2.5, utilize gas blower air-blowing, add 5kg iron carbon dust wherein, iron carbon dust is from the Wu Xihai green technology Engineering Co., Ltd of speeding, production code member: HCW-007, (wherein, iron is 2.45kg, carbon is 2.45kg, wherein be mixed with trace copper, manganese and zinc), reach the object of gas mixing, make the abundant contact reacts of iron carbon dust and waste water.Utilize online pH monitor, the variation of monitoring pH.In the time of pH=4, utilize volume pump continuously to the superoxol 4.1L that adds 30% in reactor, after reaction 4h, leave standstill, in supernatant liquor, add calcium oxide to regulate pH to 9, coagulating sedimentation, supernatant liquor adds the water outlet COD=87mg/L after clorox, and COD clearance reaches 91.3%.
In reaction unit device, introduce 360L methyldiethanolamine waste water, the COD=5000mg/L of this waste water, regulates pH to 3, adds 5kg iron carbon dust, wherein, iron carbon dust is from the Wu Xihai green technology Engineering Co., Ltd of speeding, production code member: HCW-007, and (wherein iron is 2.45kg, carbon is 2.45kg), utilize gas blower air-blowing, reach the object of gas mixing, make the abundant contact reacts of iron carbon dust and waste water.Utilize online pH monitor, the variation of monitoring pH.In the time of pH=4, utilize volume pump continuously to the superoxol 4.2L that adds 30% in reactor, after reaction 3.5h, leave standstill, in supernatant liquor, add calcium oxide to regulate pH to 9, coagulating sedimentation, measure supernatant liquor water outlet COD=2076mg/L, COD clearance reaches 58.5%.
In reactor, introduce 500L methyldiethanolamine waste water, the COD=15000mg/L of this waste water, regulates pH to 3, adds 7kg iron carbon dust, wherein, iron carbon dust is from the Wu Xihai green technology Engineering Co., Ltd of speeding, production code member: HCW-007, and (wherein iron is 3.45kg, carbon is 3.45kg), utilize gas blower air-blowing, reach the object of gas mixing, make the abundant contact reacts of iron carbon dust and waste water.Utilize online pH monitor, the variation of monitoring pH.In the time of pH=4, utilize volume pump continuously to the superoxol 4.5L that adds 30% in reactor, after reaction 4h, leave standstill, in supernatant liquor, add calcium oxide to regulate pH to 9, coagulating sedimentation, measures supernatant liquor water outlet COD=9857mg/L, and COD clearance reaches 34.3%.
By embodiment and exemplary example, the present invention is had been described in detail above, but these explanations are only illustrative, protection scope of the present invention are not formed to any restriction.In the situation that not departing from the present invention's spirit and protection domain, those skilled in the art can carry out multiple improvement, of equal value replacement or modification to the present invention and embodiment thereof, and these all should fall within the scope of protection of the present invention.
All documents of mentioning in literary composition, incorporated herein by reference in full with it.
Claims (9)
1. a treatment process for methyldiethanolamine trade effluent, the method comprises the following steps:
(1) methyldiethanolamine trade effluent is dosed in reactor, regulating wastewater pH is 2～4;
(2) in reactor, add iron carbon material, waste water is carried out to aeration simultaneously, methyldiethanolamine waste water can fully be contacted with iron carbon, and the variation of the interior reaction system pH of Real-Time Monitoring reactor;
(3) in the time that the pH of waste water in reactor is 4-5, in the waste water in reactor, add oxidants hydrogen peroxide with the ratio of 0.1-5%, fully mix;
(4) abundant mixed waste water is incorporated into coagulant precipitation groove, adds alkaline coagulating agent simultaneously, adjusting pH is 9-13, carries out coagulant precipitation;
(5) for the waste water carrying out after coagulant precipitation, add wherein oxygenant clorox, then waste water is introduced into deodorizing reactor, further reaction, promotes removal or the reduction of COD.
2. method according to claim 1, wherein, in step (1), regulating wastewater pH is 2.5～4, more preferably 3～4, also 3 left and right more preferably from about.
3. method according to claim 1 and 2, wherein, in step (1), is used the pH of pH on-line monitoring instrument Real-Time Monitoring system to change.
4. according to the method described in any one in claim 1-3, wherein, in step (2), iron carbon material be the part by weight of iron and carbon 1: 1-1: the iron carbon dust in 5 scopes or iron carbon granule.
5. method according to claim 4, wherein, in step (2), the part by weight of iron and carbon is 1: 1.
6. according to the method described in any one in claim 1-5, wherein, in step (2), aeration time is 1-10 hour.
7. according to the method described in any one in claim 1-7, wherein, in step (3), add oxidants hydrogen peroxide with the ratio of 0.1-5%.
8. according to the method described in any one in claim 1-8, wherein, in step (4), alkaline coagulating agent is calcium oxide, sodium hydroxide, potassium hydroxide, sheet alkali.
9. according to the method described in any one in claim 1-9, the method comprises:
(1) pending waste water is stored in or is introduced in waste water storage tank, regulate pH to 2～4 of waste water;
(2) aeration under the effect of aerating apparatus then, and add iron carbon dust to carry out micro-electrolysis reaction, by the pH of pH on-line monitoring instrument Real-Time Monitoring system;
(3) in the time that the pH of system is 4-5, in system, add hydrogen peroxide with the ratio of 0.1-5%, mix and carry out (class) Fenton's reaction;
(4) reacted waste water is entered in coagulant precipitation groove, add alkaline coagulating agent, carrying out coagulant precipitation regulation system pH is 9-13;
(5) upper strata waste water is introduced in deodorizing reactor, adds wherein oxygenant clorox, carry out deodorizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482462.2A CN103833166B (en) | 2012-11-23 | 2012-11-23 | A kind of methyldiethanolamine (MDEA) process for treating industrial waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210482462.2A CN103833166B (en) | 2012-11-23 | 2012-11-23 | A kind of methyldiethanolamine (MDEA) process for treating industrial waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103833166A true CN103833166A (en) | 2014-06-04 |
| CN103833166B CN103833166B (en) | 2016-03-30 |
Family
ID=50797112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210482462.2A Expired - Fee Related CN103833166B (en) | 2012-11-23 | 2012-11-23 | A kind of methyldiethanolamine (MDEA) process for treating industrial waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103833166B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445711A (en) * | 2014-10-29 | 2015-03-25 | 绍兴奇彩化工有限公司 | Treatment method for aniline wastewater |
| CN104445807A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | Treatment device and treatment process of wastewater containing methyl diethanolamine |
| CN107324559A (en) * | 2017-08-23 | 2017-11-07 | 哈尔滨工业大学 | A kind of processing method of industrial organic waste water |
| CN110040901A (en) * | 2019-05-13 | 2019-07-23 | 上海明奥环保科技有限公司 | It is a kind of can sludge reuse light electrolysis/heterogeneous Fenton fluidized-bed process and device |
| KR102085614B1 (en) * | 2018-11-28 | 2020-03-06 | 주식회사 포스코 | Wastewater treatment method and treatment device |
| CN111908569A (en) * | 2020-07-20 | 2020-11-10 | 广东石油化工学院 | Treatment method of diethanolamine wastewater |
| CN112759150A (en) * | 2020-12-31 | 2021-05-07 | 中国海洋大学 | Method for treating high-concentration methanol residual liquid wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734817A (en) * | 2009-12-31 | 2010-06-16 | 江苏苏净集团有限公司 | Method for treating organic chemical waste water |
| CN102531247A (en) * | 2011-12-26 | 2012-07-04 | 浙江天蓝环保技术股份有限公司 | Treatment method for wastewater produced during flue gas desulphurization through alcohol-amine process |
-
2012
- 2012-11-23 CN CN201210482462.2A patent/CN103833166B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101734817A (en) * | 2009-12-31 | 2010-06-16 | 江苏苏净集团有限公司 | Method for treating organic chemical waste water |
| CN102531247A (en) * | 2011-12-26 | 2012-07-04 | 浙江天蓝环保技术股份有限公司 | Treatment method for wastewater produced during flue gas desulphurization through alcohol-amine process |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445711A (en) * | 2014-10-29 | 2015-03-25 | 绍兴奇彩化工有限公司 | Treatment method for aniline wastewater |
| CN104445807A (en) * | 2014-10-31 | 2015-03-25 | 中国石油化工股份有限公司 | Treatment device and treatment process of wastewater containing methyl diethanolamine |
| CN107324559A (en) * | 2017-08-23 | 2017-11-07 | 哈尔滨工业大学 | A kind of processing method of industrial organic waste water |
| KR102085614B1 (en) * | 2018-11-28 | 2020-03-06 | 주식회사 포스코 | Wastewater treatment method and treatment device |
| CN110040901A (en) * | 2019-05-13 | 2019-07-23 | 上海明奥环保科技有限公司 | It is a kind of can sludge reuse light electrolysis/heterogeneous Fenton fluidized-bed process and device |
| CN111908569A (en) * | 2020-07-20 | 2020-11-10 | 广东石油化工学院 | Treatment method of diethanolamine wastewater |
| CN112759150A (en) * | 2020-12-31 | 2021-05-07 | 中国海洋大学 | Method for treating high-concentration methanol residual liquid wastewater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103833166B (en) | 2016-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103833166B (en) | A kind of methyldiethanolamine (MDEA) process for treating industrial waste water | |
| CN103140270B (en) | Gas flow purifier apparatus and method | |
| CN102219323B (en) | Method for simultaneously removing organic pollutants and ammonia in waste water and reactor | |
| WO2010016268A1 (en) | Water treatment system and water treatment method | |
| CA2664679A1 (en) | System and method for eliminating sludge via ozonation | |
| JP2008168201A (en) | Wastewater treatment method | |
| CN105884007A (en) | Method for catalytic ozonization treatment of acidic nitrobenzene wastewater | |
| WO2015186590A1 (en) | Method for treating liquid containing organic amine compound | |
| CN109794155A (en) | The method for handling VOCs and foul gas | |
| JP2007038169A (en) | Method and apparatus for removing acid gas | |
| CN103739128A (en) | Pretreatment system and pretreatment method for high-concentration refractory organic wastewater | |
| JP4862314B2 (en) | Method and apparatus for desulfurization of gas containing hydrogen sulfide | |
| Ou et al. | Removal of hydrogen sulfide from biogas using a bubbling tank fed with aerated wastewater | |
| JP2010089020A (en) | Waste water treatment apparatus | |
| JP2010063954A (en) | Liquid treatment apparatus | |
| KR101533979B1 (en) | Treatment of wastewater containing ethanolamine in secondary system of nuclear power plant | |
| KR102175423B1 (en) | Wastewater treatment method and treatment device | |
| US10493423B2 (en) | Purification treatment method of liquid containing harmful substance, and purification treatment device of liquid containing harmful substance for carrying out said method | |
| JP5027000B2 (en) | Nitrification processing method and nitrification processing apparatus | |
| CN113184972B (en) | Method for removing organic pollutants in wastewater by sequencing batch reaction | |
| JP5061320B2 (en) | Water treatment reactor, water treatment system, and water treatment method | |
| CN106630312B (en) | Treatment system, treatment method and application of coking phenol-cyanogen wastewater | |
| TWI499562B (en) | Wastewater treatment process of semiconductor manufacturing method | |
| CN209740922U (en) | System for advanced wastewater treatment | |
| KR20090083141A (en) | Method for removal of ammonia from waste water |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20191123 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |