CN109987770A - A kind of triethyl phosphite waste water treatment process - Google Patents
A kind of triethyl phosphite waste water treatment process Download PDFInfo
- Publication number
- CN109987770A CN109987770A CN201910383966.0A CN201910383966A CN109987770A CN 109987770 A CN109987770 A CN 109987770A CN 201910383966 A CN201910383966 A CN 201910383966A CN 109987770 A CN109987770 A CN 109987770A
- Authority
- CN
- China
- Prior art keywords
- waste water
- triethyl phosphite
- lime
- hours
- sedimentation
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
Abstract
The present invention relates to a kind of triethyl phosphite waste water treatment process, belong to technical field of chemical synthesis.Phosphorous acid is oxidized to orthophosphoric acid under ozonidation using milk of lime and bodied ferric sulfate as precipitating reagent by the present invention, precipitates the phosphonium ion in waste water by adjusting pH value.The present invention reduces useless Organic substance in water (benzene, triethylamine) and ammonia radical ion volatilization by the ammonia nitrogen and COD in waste water using the method for high-temperature heating, then lime precipitation major part phosphonium ion is first passed through to reduce the pharmaceutical use of second level sedimentation, reduced cost for wastewater treatment.The usage amount of the invention Chinese medicine is seldom, and the precipitating that level-one sedimentation generates has certain economic benefit.Waste water treatment process green, environmental protection, reduce production cost, are suitable for industrialization expanding production.
Description
Technical field
The present invention relates to a kind of triethyl phosphite waste water treatment process, belong to technical field of chemical synthesis.
Background technique
Triethyl phosphite is the important intermediate for producing the medicine such as phosphonoacetate, AE-active ester.Agriculture
On medicine for manufacture phosphine oxamate, go out the insecticides such as snout moth's larva prestige, in China, agriculture, forestry applications are extensive, and insecticide effect is good, and demand is very
Greatly.Dye industry is also used for the plasticizer of manufacture plastics industry and steady for manufacturing styrene biphenyl fluorescent brightener
Determine agent, the additive of lubricating oil and lubricating grease, development and application have good prospects.The main process route of triethyl phosphite be with
Phosphorus trichloride, ethyl alcohol are primary raw material, make solvent with benzene, synthetic reaction generates triethyl phosphite, there is hydrogen chloride gas in the process
Body generates, and makees acid binding agent with triethylamine, adds caustic soda and parse triethylamine, while generating sodium chloride salt.Contain in waste water
There are a large amount of side product chlorinated sodium and a small amount of oil-based solvent benzene and triethylamine.The waste water has high salinity, high biochemical oxygen demand
The characteristics of amount, causes the waste water to handle by general sewage water treatment method extremely difficult.Since processing cost is very high, life is considerably increased
Cost is produced, enterprise is generally difficult to bear, and most of triethyl phosphite manufacturing enterprise is all to cause direct discharging of waste water
Great environmental pollution and the wasting of resources.Therefore the wastewater treatment in triethyl phosphite production process is always Business survival hair
One big bottleneck of exhibition.
Triethyl phosphite waste water treatment process currently generallys use direct oxidation for phosphorous acid both at home and abroad and aoxidizes the phosphorus that is positive
Then phosphorous acid is oxidized to orthophosphoric acid under the action of oxidant, ozone by dephosphorization after acid, is then added after lime stone stirring directly
Outlet is connect, or outlet after lime stone stirs is added directly in waste water.In the above described two methods, difference be whether oxygen
Change, total phosphorus is phosphorous in 100mg/L or more, COD2000mg/L or more in the draining of two schemes China and foreign countries, and national row is not achieved completely
Put standard.
Summary of the invention
Purpose Yu ﹕ of the invention provides that a kind of equipment investment is few, production cost is low, and good waste water treatment effect, preparation
Technique is environmentally protective；It can effectively avoid the excessively high triethyl phosphite waste water treatment process of efflux wastewater total phosphorus, ammonia nitrogen, COD.
Technical solution Shi ﹕ of the invention
A kind of Qi Te of triethyl phosphite waste water treatment process , sign Yu ﹕ Bao includes Bu Zhou ﹕ under Yi
1), triethyl phosphite waste water is placed in stirred tank, a condenser communicated therewith is installed above stirred tank, is used for
Heat up the moisture backflow generated, opens stirring, and mixing speed is 150-200 turns per minute, and temperature is slowly increased to 70-80 DEG C,
A length of 2-2.5 hours when agitating and heating；
2), after the completion of triethyl phosphite waste water agitating and heating in stirred tank, material is put and is cooled down into oxidizing tower, temperature is worked as
It when being down to room temperature, is passed through ozone and stirs, so that material is aerated；A length of 7-8 hours when ozone is passed through；After aeration, measurement
PH is in 6-7 or so；
3) after, being aerated, material is transferred to level-one settling tank, milk of lime is added and stirs half an hour, settler overflow；Milk of lime
Feeding quantity is the 1% of triethyl phosphite waste water weight, and the sedimentation time is 7-9 hours；
4) overflow water enters dephosphorization pond (second level settling tank) after, settling, and hydrochloric acid is added to adjust PH less than 7, adds polymerization
Ferric sulfate stirs half an hour, and the feeding quantity of bodied ferric sulfate is the one thousandth of triethyl phosphite waste water weight；Then it is added
Milk of lime adjusts PH and is greater than 11.5, after slowly stirring sedimentation 7-9 hours slowly, and waste water total phosphorus is phosphorous to be less than 5PPM, and COD is less than
500PPM, ammonia nitrogen are less than 50PPM；It can outlet.
The beneficial effect Yu ﹕ of the present invention compared with prior art
In the connection triethyl phosphite waste water treatment process, phosphorous acid, at orthophosphoric acid, is sunk by ozone oxidation by lime stone level-one
It after drop, is then settled with bodied ferric sulfate, final total phosphorus content reaches technique requirement.This process flow is simple to operation, level-one
The solid generated in infall process is precipitated as calcium hydroxy phosphate, is a kind of with the phosphate fertilizer with economic benefit, very good solution
The solid waste problem generated in sewage disposal process.Next is that other pollution sources will not be brought with ozone oxidation, will be not easy
The phosphorous acid for generating precipitating is converted into precipitable orthophosphoric acid.Lime stone is added to precipitate for the first time, reduces the use of bodied ferric sulfate
Amount reduces processing cost.Ammonia volatilization in waste water is effectively reduced by ammonia-nitrogen content by high-temperature stirring in the first step.The phosphorous
Triethylenetetraminehexaacetic acid ester waste water treatment process only needs a set of stirred tank, oxidizing tower, and two settling tanks can complete entire production technology, saves
Production equipment, reduces production cost.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention is further explained in the light of specific embodiments, and the present invention is not limited to embodiment, embodiments thereof
It can be any mode described in summary of the invention.
Embodiment 1
First triethyl phosphite waste water is placed in stirred tank, opens stirring, mixing speed is 200 turns per minute or more.Temperature
Constant temperature two hours after being slowly increased to 80 DEG C, allow useless Organic substance in water and ammonia to be sufficiently precipitated.When triethyl phosphite in stirred tank
After the completion of waste water agitating and heating 2 hours, material is put and is cooled down into oxidizing tower, when temperature is down to room temperature, continuously led to
Ozone stirring；8 hours a length of when logical ozone, this can divide tertiary oxidation in the process.After oxidation, waste water phosphorous acid at this time
All it is oxidized to orthophosphoric acid.PH is measured in 6-7 or so.Then material is transferred to level-one settling tank, milk of lime and PAM stirring is added
Half an hour, settler overflow.The feeding quantity of milk of lime be 1%, the PAM feeding quantity of triethyl phosphite waste water weight be million/
Two, the sedimentation time is 8 hours.Triethyl phosphite waste water, which first passes through high-temperature heating, reduces ammonia nitrogen and COD content, uses ozone oxygen afterwards
Change, do not bring other pollution sources into, is then settled in advance by lime stone, reduce subsequent pharmaceutical quantities.
Overflow water enters dephosphorization pond (second level settling tank) after sedimentation, adds hydrochloric acid to adjust PH less than 7, polymerization is then added
Ferric sulfate stirs half an hour, and milk of lime is then added and adjusts PH greater than 11.5, stirs settler overflow slowly, and the sedimentation time is 8 hours.It is poly-
The feeding quantity for closing ferric sulfate is the one thousandth of triethyl phosphite waste water weight.It is slowly slow that adjusting pH value has to be larger than 11.5.
After stirring sedimentation 8 hours, waste water total phosphorus is phosphorous to be less than 5PPM, and COD is less than 500PPM, and ammonia nitrogen is less than 50PPM；It can outlet.
Embodiment 2
First triethyl phosphite waste water is placed in stirred tank, opens stirring, mixing speed is 180 turns per minute.Temperature is slow
Constant temperature two hours after rising to 70 DEG C, allow useless Organic substance in water and ammonia to be sufficiently precipitated.When triethyl phosphite waste water in stirred tank
After the completion of agitating and heating 2.5 hours, material is put and is cooled down into oxidizing tower, when temperature is down to room temperature, continuously led to smelly
Oxygen stirring；9 hours a length of when logical ozone, this can divide tertiary oxidation in the process.After oxidation, waste water phosphorous acid is complete at this time
Portion is oxidized to orthophosphoric acid.PH is measured in 6-7 or so.Then material is transferred to level-one settling tank, milk of lime and PAM stirring half is added
Hour, settler overflow.The feeding quantity of milk of lime is that 1%, the PAM feeding quantity of triethyl phosphite waste water weight is 2/1000000ths,
Sedimentation time is 9 hours.Triethyl phosphite waste water, which first passes through high-temperature heating, reduces ammonia nitrogen and COD content, uses ozone oxidation afterwards,
It does not bring other pollution sources into, is then settled in advance by lime stone, reduce subsequent pharmaceutical quantities.
Overflow water enters dephosphorization pond (second level settling tank) after sedimentation, adds hydrochloric acid to adjust PH less than 7, polymerization is then added
Ferric sulfate stirs half an hour, and milk of lime is then added and adjusts PH greater than 11.5, stirs settler overflow slowly, and the sedimentation time is 9 hours.It is poly-
The feeding quantity for closing ferric sulfate is the one thousandth of triethyl phosphite waste water weight.It is slowly slow that adjusting pH value has to be larger than 11.5.
After stirring sedimentation 8 hours, waste water total phosphorus is phosphorous to be less than 5PPM, and COD is less than 500PPM, and ammonia nitrogen is less than 50PPM；It can outlet.
Embodiment 3
First triethyl phosphite waste water is placed in stirred tank, opens stirring, mixing speed is 150 turns per minute.Temperature is slow
Constant temperature two hours after rising to 75 DEG C, allow useless Organic substance in water and ammonia to be sufficiently precipitated.When triethyl phosphite waste water in stirred tank
After the completion of agitating and heating 2.5 hours, material is put and is cooled down into oxidizing tower, when temperature is down to room temperature, continuously led to smelly
Oxygen stirring；7 hours a length of when logical ozone, this can divide tertiary oxidation in the process.After oxidation, waste water phosphorous acid is complete at this time
Portion is oxidized to orthophosphoric acid.PH is measured in 6-7 or so.Then material is transferred to level-one settling tank, milk of lime and PAM stirring half is added
Hour, settler overflow.The feeding quantity of milk of lime is that 1%, the PAM feeding quantity of triethyl phosphite waste water weight is 2/1000000ths,
Sedimentation time is 7 hours.Triethyl phosphite waste water, which first passes through high-temperature heating, reduces ammonia nitrogen and COD content, uses ozone oxidation afterwards,
It does not bring other pollution sources into, is then settled in advance by lime stone, reduce subsequent pharmaceutical quantities.
Overflow water enters dephosphorization pond (second level settling tank) after sedimentation, adds hydrochloric acid to adjust PH less than 7, polymerization is then added
Ferric sulfate stirs half an hour, and milk of lime is then added and adjusts PH greater than 11.5, stirs settler overflow slowly, and the sedimentation time is 7 hours.It is poly-
The feeding quantity for closing ferric sulfate is the one thousandth of triethyl phosphite waste water weight.It is slowly slow that adjusting pH value has to be larger than 11.5.
After stirring sedimentation 7 hours, waste water total phosphorus is phosphorous to be less than 5PPM, and COD is less than 500PPM, and ammonia nitrogen is less than 50PPM；It can outlet.
The above is presently preferred embodiments of the present invention, and the example above explanation not make for the essence of the present invention by content
Limitation in any form, technology of the person of an ordinary skill in the technical field after having read this specification according to the present invention
Essence is to any simple modification or deformation made by the above specific embodiment, and the technology contents possibly also with the disclosure above
The equivalent embodiment of equivalent variations is changed or is modified to, all of which are still within the scope of the technical scheme of the invention, without departing from
The spirit and scope of the invention.
Claims (1)
1. a kind of Qi Te of triethyl phosphite waste water treatment process , sign Yu ﹕ Bao includes Bu Zhou ﹕ under Yi
1), triethyl phosphite waste water is placed in stirred tank, a condenser communicated therewith is installed above stirred tank, is used for
Heat up the moisture backflow generated, opens stirring, and mixing speed is 150-200 turns per minute, and temperature is slowly increased to 70-80 DEG C,
A length of 2-2.5 hours when agitating and heating；
2), after the completion of triethyl phosphite waste water agitating and heating in stirred tank, material is put and is cooled down into oxidizing tower, temperature is worked as
It when being down to room temperature, is passed through ozone and stirs, so that material is aerated；A length of 7-8 hours when ozone is passed through；After aeration, measurement
PH is in 6-7 or so；
3) after, being aerated, material is transferred to level-one settling tank, milk of lime is added and stirs half an hour, settler overflow；Milk of lime
Feeding quantity is the 1% of triethyl phosphite waste water weight, and the sedimentation time is 7-9 hours；Triethyl phosphite waste water first passes through height
The purpose of temperature heating uses ozone oxidation afterwards, does not bring other pollution sources into, then pass through lime stone to reduce ammonia nitrogen and COD content
Sedimentation in advance, to reduce subsequent pharmaceutical quantities；
4) overflow water enters dephosphorization pond (second level settling tank) after, settling, and hydrochloric acid is added to adjust PH less than 7, adds polymerization
Ferric sulfate stirs half an hour, and the feeding quantity of bodied ferric sulfate is the one thousandth of triethyl phosphite waste water weight；Then it is added
Milk of lime adjusts PH and is greater than 11.5, after slowly stirring sedimentation 7-9 hours slowly, and waste water total phosphorus is phosphorous to be less than 5PPM, and COD is less than
500PPM, ammonia nitrogen are less than 50PPM；It can outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910383966.0A CN109987770B (en) | 2019-05-09 | 2019-05-09 | Triethyl phosphite wastewater treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910383966.0A CN109987770B (en) | 2019-05-09 | 2019-05-09 | Triethyl phosphite wastewater treatment process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109987770A true CN109987770A (en) | 2019-07-09 |
| CN109987770B CN109987770B (en) | 2021-08-20 |
Family
ID=67136295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910383966.0A Active CN109987770B (en) | 2019-05-09 | 2019-05-09 | Triethyl phosphite wastewater treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109987770B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4689154A (en) * | 1985-11-15 | 1987-08-25 | Occidental Chemical Corporation | Process for removing phosphorus from industrial waste water |
| CN1234373A (en) * | 1999-04-21 | 1999-11-10 | 邯郸滏阳化工集团有限公司 | Method for treatment of waste liquid from production process of trimethyl phosphite, dimethyl phosphite and phosphates and other waste liquids containing nitrogen |
| US20040129647A1 (en) * | 2003-01-03 | 2004-07-08 | Huei-Tarng Liou | Method for reducing COD (chemical oxygen demand) in waste water by using O3 with valent ion chelation |
| CN101624400A (en) * | 2009-08-07 | 2010-01-13 | 湖北三才堂化工科技有限公司 | Production method of triethyl phosphite |
| CN103964622A (en) * | 2013-02-05 | 2014-08-06 | 江苏优士化学有限公司 | Comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid |
| CN105130822A (en) * | 2015-09-21 | 2015-12-09 | 四川乐创科技有限公司 | Method for recovering triethylamine, removing phosphorus pollutants and recovering phosphorus resources in glyphosate mother liquor |
| CN105906026A (en) * | 2016-06-08 | 2016-08-31 | 浙江奇彩环境科技股份有限公司 | Treatment method for wastewater containing small-molecular organic matter |
| CN207986908U (en) * | 2018-02-26 | 2018-10-19 | 武夷学院 | A kind of pesticide waste water treatment device |
| CN208008608U (en) * | 2017-08-17 | 2018-10-26 | 佛山市顺德区澄至环境工程有限公司 | A kind of device of processing triethyl phosphite phosphorus-containing wastewater |
-
2019
- 2019-05-09 CN CN201910383966.0A patent/CN109987770B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4689154A (en) * | 1985-11-15 | 1987-08-25 | Occidental Chemical Corporation | Process for removing phosphorus from industrial waste water |
| CN1234373A (en) * | 1999-04-21 | 1999-11-10 | 邯郸滏阳化工集团有限公司 | Method for treatment of waste liquid from production process of trimethyl phosphite, dimethyl phosphite and phosphates and other waste liquids containing nitrogen |
| US20040129647A1 (en) * | 2003-01-03 | 2004-07-08 | Huei-Tarng Liou | Method for reducing COD (chemical oxygen demand) in waste water by using O3 with valent ion chelation |
| CN101624400A (en) * | 2009-08-07 | 2010-01-13 | 湖北三才堂化工科技有限公司 | Production method of triethyl phosphite |
| CN103964622A (en) * | 2013-02-05 | 2014-08-06 | 江苏优士化学有限公司 | Comprehensive treatment and resource utilization method for industrial organic phosphorus waste liquid |
| CN105130822A (en) * | 2015-09-21 | 2015-12-09 | 四川乐创科技有限公司 | Method for recovering triethylamine, removing phosphorus pollutants and recovering phosphorus resources in glyphosate mother liquor |
| CN105906026A (en) * | 2016-06-08 | 2016-08-31 | 浙江奇彩环境科技股份有限公司 | Treatment method for wastewater containing small-molecular organic matter |
| CN208008608U (en) * | 2017-08-17 | 2018-10-26 | 佛山市顺德区澄至环境工程有限公司 | A kind of device of processing triethyl phosphite phosphorus-containing wastewater |
| CN207986908U (en) * | 2018-02-26 | 2018-10-19 | 武夷学院 | A kind of pesticide waste water treatment device |
Non-Patent Citations (6)
| Title |
|---|
| LINYAN YANG等: "Treatment of triethyl phosphate wastewater by fenton oxidation and aerobic biodegradation", 《SCIENCE OF THE TOTAL ENVIRONMENT》 * |
| 吴树森等: "亚磷酸酯工业废水的除磷研究", 《环境化学》 * |
| 国家环保总局: "《关于《污水综合排放标准》（GB8978-1996）中磷酸盐及其监测方法的通知》", 4 November 1998 * |
| 国家环境保护局等: "《中华人民共和国国家标准 GB8978-1996 污水综合排放标准》", 1 January 1998 * |
| 张宇: "加热回流氧化法处理亚磷酸三乙酯农药废水", 《现代农药》 * |
| 汪敦佳等: "亚磷酸三乙酯的合成工艺改进", 《化学与粘合》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109987770B (en) | 2021-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Abouhend et al. | The oxygenic photogranule process for aeration-free wastewater treatment | |
| CN103626293B (en) | A kind of natural magnetic iron ore biofilter and utilize its synchronous method of removing nitre nitrogen and phosphorus in water | |
| Lee et al. | Nitrogen removal from wastewaters by microalgae without consuming organic carbon sources | |
| Wei et al. | Partial nitrification granular sludge reactor as a pretreatment for anaerobic ammonium oxidation (Anammox): Achievement, performance and microbial community | |
| Marcilhac et al. | Control of nitrogen behaviour by phosphate concentration during microalgal-bacterial cultivation using digestate | |
| CN103011493B (en) | Method for removing phosphate and nitrogen from hyperphosphate and high ammonia nitrogen sewage and recovering resources | |
| Feng et al. | Influence of turbulent mixing on the composition of extracellular polymeric substances (EPS) and aggregate size of aerated activated sludge | |
| CN105174463A (en) | Sewage treatment system and method based on sludge carbon source and nitrogen and phosphorus recycling | |
| EP3018105A1 (en) | Enhanced sewage biological nitrogen and phosphorus removal method based on polyhydroxyalkanoates metabolic regulation | |
| KR100460214B1 (en) | Wastewater treatment method and wastewater treatment system using photosynthetic microorganisms | |
| CN104355403B (en) | A kind of activated sludge culture method for chemical wastewater treatment | |
| CN102690026B (en) | Method for treating waste water generated in casing production | |
| He et al. | Rapid start-up and stable operation of an aerobic/oxic/anoxic simultaneous nitrification, denitrification, and phosphorus removal reactor with no sludge discharge | |
| CN103626302B (en) | The sewage water treatment method that a kind of denitrogenation dephosphorizing bacterial classification On-line testing is cultivated and tamed | |
| Abdulsada | Evaluation of microalgae for secondary and tertiary wastewater treatment | |
| CN106116027A (en) | Treatment method of printing and dying wastewater and device thereof | |
| Laurent et al. | Finding optimal algal/bacterial inoculation ratio to improve algal biomass growth with wastewater as nutrient source | |
| Huang et al. | Nitrogen and phosphorus removal by coupling Anaerobic ammonia oxidation reaction with algal-bacterial symbiotic system | |
| CN107814466A (en) | A kind of DPT production wastewater treatments technique | |
| US3586625A (en) | Treatment of aqueous streams for removal of nitrogen and phosphorus compounds | |
| CN109987770A (en) | A kind of triethyl phosphite waste water treatment process | |
| CN102381817B (en) | System for processing waste water generated in acrylamide production and processing method thereof | |
| Biliani et al. | Wastewater treatment by high density algal flocs for nutrient removal and biomass production | |
| CN105948234B (en) | A kind of method of resource of phosphorous aerobic particle mud | |
| CN105541023B (en) | A kind of oil refining wastewater circulation method for deeply treating water based on BESI technologies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201130 Address after: No. 158, agricultural technology road, Jingzhou Development Zone, Jingzhou, Hubei Applicant after: Jingzhou sancaitang Chemical Technology Co., Ltd Address before: No. 158, agricultural technology road, Jingzhou Development Zone, Jingzhou, Hubei Applicant before: HUBEI SANCAITANG CHEMICAL Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |