CN101423265A - Ion-exchange denitrification and phosphorus removal advanced treatment method - Google Patents
Ion-exchange denitrification and phosphorus removal advanced treatment method Download PDFInfo
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- CN101423265A CN101423265A CNA2008101802803A CN200810180280A CN101423265A CN 101423265 A CN101423265 A CN 101423265A CN A2008101802803 A CNA2008101802803 A CN A2008101802803A CN 200810180280 A CN200810180280 A CN 200810180280A CN 101423265 A CN101423265 A CN 101423265A
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Abstract
Aiming at the shortage of secondary nitrification effluent depth nitrogen and phosphorus removal technology for the existing sewage plants in cities, the invention provides a water pollution purification method of ion exchange depth nitrogen and phosphorus removal. By the design and creation of factors such as conventional strong basic anion exchange resin operating parameters, and the like, the invention simplifies resin activation, regeneration processes as well as ion exchange reactor configuration type and takes the method as a secondary nitrification effluent depth treatment technology for the urban sewage plants, or an eutrophication lake situ purification technology. The invention not only has very high total phosphorus removal rate, but also has better nitrate removal effect, and also has the advantages of low running cost, small amount of sludge and the like.
Description
Technical field
The invention belongs to environmental engineering and waste water treatment engineering field, relate in particular to a kind of water removing pollutant method that adopts nitrated water outlet of strongly basic anion exchange resin Treating Municipal Sewage treatment plant secondary or eutrophication river Lake Water Body to realize the advanced nitrogen dephosphorization.
Background technology
In recent years, along with improving constantly of industrialization and urbanization degree, nitrogen, phosphorus nutrition thing enter water body in a large number in the municipal effluent, make body eutrophication serious day by day.Body eutrophication causes that blue-green algae and other waterplant breed unusually, serious consequences such as raw meat fouling are sent out in water transparency decline, dissolved oxygen content reduction, hydrobiont mass mortality, water quality deterioration, water taste.The discharging of control municipal effluent nitrogen phosphorus is the importance of control river Lake Water Body eutrophication, and wherein phosphorus is the emphasis of control as the eutrophication limiting factor.A is generally adopted in municipal sewage treatment at present
2/ O biological process denitrification dephosphorization technique and modification technology thereof, the general character of these technologies is for all adopting nitration processes as its aftertreatment, water outlet contains more nitrate and certain density phosphorus (its main component is an orthophosphoric acid salt), wherein phosphorus concentration is far above the eutrophication limiting concentration, need deep phosphorous removal with further reduction phosphorus concentration, satisfy the standard of drainage of increasingly stringent.
The municipal wastewater treatment plant secondary treatment yielding water generally adopts calcium salt class chemical precipitation method as the deep phosphorous removal treatment technology, its water outlet phosphorus concentration is difficult to be controlled at below the 0.1mg/L, and produce more unserviceable calcic mud, in addition, someone adopts the advanced treatment technology of artificial swamp as the nitrated water outlet of municipal wastewater treatment plant secondary, although it has certain removal effect to organism and nitrogen, it mainly relies on the adsorption of matrix to the removal of phosphorus, thereby effect is not very good.The investigator who also has adopts absorption method as the deep phosphorous removal technology, but this technology still is in research level at present, and industrial applications is extremely rare, and the capacity that mainly is limited as sorbent material is less, and selectivity is relatively poor.Compare with above-mentioned several technology, ion-exchange is as a kind of classics ion remaval technology efficiently, be widely used in the production of high purity water or deionized water, have very many industrial applications examples, strongly basic anionic resin is applied to the municipal wastewater treatment plant secondary is nitrated to go out water treatment, not only can efficient dephosphorization (water outlet phosphorus is reduced to＜0.1mg/L), and can remove certain density nitrate, it is the nitrated water outlet advanced nitrogen of a kind of very effective municipal wastewater treatment plant secondary dephosphorization technique, and it is fast that this technology is applied to have speed when eutrophication river Lake Water Body original position purifies, effective, can fundamentally purify advantages such as river Lake Water Body, yet through extensively retrieval is Chinese, European Union, patent mechanisms such as the U.S. all do not find strongly basic anion exchange resin is applied to the patent of municipal sewage treatment.Retrieval has found that other type ion exchange resin is applied to the Europatent of municipal sewage treatment, be that application number is US19980206446, name is called Selective removal of phosphates and chromates from contaminated water by ionexchange, publication number is that (this patent is 09/206446 at the application number of the U.S. simultaneously for the Europatent of US6 136 199 (A), name is called Selective removal of phosphates and chromates from contaminated water by ion exchange, publication number is 6136199), it utilizes polymerized coordination exchange resin (polymeric ligand exchanger, PLE) phosphoric acid salt in the selective removal water, PLE is formed by polymer (as resin) and transition metal chelating, combine with phosphoric acid salt by electrostatic interaction and Lewis Acids and Bases synergy, compare with the common anion resin and to have high phosphoric acid salt selectivity, this technology also has the inferior position of following several aspects: (1) resin synthetic with the equal difficulty of regeneration.Because heavy metal single load factor is lower, must be repeatedly when synthetic PLE with metallic solution by resin to improve its load factor, must adopt acidic salt solution regeneration during regeneration, big to equipment corrosion, can produce metal loss during regeneration, thereby regenerative process also comprises the metal load program, makes regenerative process too complicated; (2) higher this resin that causes of Choice of Resin only has phosphorus removal functional and does not take off (nitre) nitrogen function, and phosphorus or nitrogen all are the important factors of eutrophication, thereby denitrogenation dephosphorizing has great importance for present municipal effluent plant effluent deep purifying simultaneously.
This shows, be used for the nitrated water outlet of municipal wastewater treatment plant secondary or lake, river purifying of the hypertrophic water system with conventional strongly basic anion exchange resin as sorbent material and have simultaneously characteristics such as take off the dephosphorization of (nitre) nitrogen, technology is simple, decontamination effect improving is remarkable, ion exchange process is applied to the eutrophication control has very realistic meanings.
Summary of the invention
The present invention is directed to the deficiency of the nitrated water outlet advanced nitrogen of current municipal wastewater treatment plant secondary dephosphorization technique, the water removing pollutant method of a kind of ion-exchange advanced nitrogen dephosphorization is provided, it is by design and transformation to factors such as conventional strongly basic anion exchange resin and operating parameterss, with it as municipal wastewater treatment plant secondary nitrated water outlet advanced treatment technology or eutrophic lake original position purification techniques, not only has high total tp removal rate, and have nitrate removal effect preferably, and have characteristics such as running cost is low, sludge quantity is little.
The invention is characterized in that described strongly basic anion exchange resin can be removed simultaneously through (nitre) nitrogen and phosphorus in nitrated water outlet of municipal wastewater treatment plant secondary or the nutrition-enriched water of lake, removes the efficient height.
Main purpose of the present invention is to overcome the deficiency that the existing advanced nitrogen dephosphorization technique of the nitrated water outlet of municipal wastewater treatment plant secondary exists, and provides that a kind of technology is simple, denitrogenation dephosphorizing efficient height, advanced treatment new technology that the water outlet concentration of nitrogen and phosphorus is extremely low.Compared with prior art the art of this patent has the following advantages:
(1) can efficiently remove nitre nitrogen and phosphorus simultaneously, water outlet nitre nitrogen and phosphorus concentration are extremely low: strong anion-exchange resin reaches respectively more than 85-90% and 95% clearance of nitre nitrogen and phosphorus, and the water outlet concentration of nitrogen and phosphorus can be controlled in any lower level.
(2) new resin need not activate specially, but directly uses: general strong anion-exchange resin is the chlorine type when dispatching from the factory, and does not need to resemble to adopt soda acid to activate repeatedly high purity water and the deionized water production, can use after adopting tap water directly to soak.
(3) resin regeneration is easy: saturated resin adopts 6%NaCl solution promptly renewable, and regeneration cost is low.
(4) resin and regenerated liquid all can use repeatedly, reduce running cost.
Description of drawings
Accompanying drawing has provided process device figure of the present invention.
Wherein 1 is that sand filter (or film system) 2 is water collecting basin for ion exchange column 3
Embodiment
Below describe principle of work of the present invention and embodiment in detail:
At first waste water enters sand filter (or film system) 1, through filtering, the suspended substance that particle diameter is bigger is filtered, waste water after the filtration passes through anion-exchange column 2 from top to down under action of gravity, oxynitride in the waste water, phosphoric acid salt are attracted on the anionite-exchange resin, waste water is purified, and water outlet flows into water collecting basin, mixing.Water collecting basin has the effect of the water quality of balanced water outlet, and it can guarantee to improve the exchange capacity of ion exchange column under the effluent quality situation up to standard.When treating that water quality in the water collecting basin reaches the effluent quality standard, anion-exchange column 2 needs regeneration.Adopt counter-current regeneration: 6%NaCl regenerated liquid through port 4 enters anion-exchange column 2, passes resin layer, discharges through anion-exchange column mouth 5, when the phosphorus concentration in the liquid effluent is reduced to certain standard, promptly finishes regeneration.
Embodiment 1
The nitrated effluent quality feature of certain municipal wastewater treatment plant secondary is as shown in table 1, utilizes the present invention as advanced treatment, and the ion-exchange effluent index is as shown in table 1 during 300BV.
The desired value of certain municipal wastewater treatment plant secondary treatment yielding water of table 1 before and after ion exchange treatment
| COD Cr(mg/L) | BOD 5(mg/L) | NO x-N(mg/L) | TP(mg/L) | SS(mg/L) | |
| Before the processing | 50 | 20 | 8 | 1.8 | 15 |
| After the processing | 30 | 12 | 1.1 | 0.1 | 1.4 |
Embodiment 2
The lake eutrophication of city, Beijing is serious, and water quality has reached V class water quality standard, and water-quality guideline is as shown in table 2.Adopt this nutritive water of filtration treatment of the present invention, effluent quality is as shown in table 2 during 1000BV.
The desired value of certain eutrophic lake water of table 2 before and after ion exchange process is handled
| COD Cr(mg/L) | BOD 5(mg/L) | NO x-N(mg/L) | TP(mg/L) | |
| Before the processing | 43 | 11 | 2.8 | 0.4 |
| After the processing | 35 | 8 | 0.19 | 0.02 |
Claims (1)
1, the nitrated water outlet advanced nitrogen of a kind of municipal wastewater treatment plant secondary phosphorus removing method, it is characterized in that: by design and transformation strongly basic anion exchange resin and exchange operations parameter etc., ion exchange technique is applied to the nitrated water outlet of municipal wastewater treatment plant secondary, nitre nitrogen, total tp removal rate reach more than 95%, and the original position that this method also can be applicable to nutrition-enriched water of lake purifies.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101802803A CN101423265A (en) | 2008-12-03 | 2008-12-03 | Ion-exchange denitrification and phosphorus removal advanced treatment method |
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| CNA2008101802803A CN101423265A (en) | 2008-12-03 | 2008-12-03 | Ion-exchange denitrification and phosphorus removal advanced treatment method |
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| CN101423265A true CN101423265A (en) | 2009-05-06 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101817605A (en) * | 2010-05-10 | 2010-09-01 | 苏州市普滤得净化有限公司 | Process for directionally removing nitric acid/nitrous acid from drinking water |
| CN101898809A (en) * | 2009-05-29 | 2010-12-01 | 株式会社东芝 | Water treatment device |
| CN102320680A (en) * | 2011-06-14 | 2012-01-18 | 中国水产科学研究院淡水渔业研究中心 | A kind of preparation method of the body available phosphorus ionite that anhydrates |
| CN102390879A (en) * | 2011-10-17 | 2012-03-28 | 南京大学 | Method for simultaneously and selectively removing nitrate and phosphate from secondary biochemical effluent |
| CN102398960A (en) * | 2011-09-29 | 2012-04-04 | 浙江农林大学 | Device and method for in-situ recovery of phosphorus in water body |
| CN102603120A (en) * | 2012-03-14 | 2012-07-25 | 河海大学 | Device and method for treating sewage with low ratio of carbon to nitrogen |
| CN102659264A (en) * | 2012-05-22 | 2012-09-12 | 麻克栋 | Ion exchange pretreatment method of softened/demineralized water |
| CN104261596A (en) * | 2014-10-23 | 2015-01-07 | 湖北君集水处理有限公司 | Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid |
| CN104820081A (en) * | 2015-05-20 | 2015-08-05 | 中国水产科学研究院淡水渔业研究中心 | Method and device for preliminary evaluation of dead fish accident in heavy metal wastewater |
| CN108862472A (en) * | 2018-07-04 | 2018-11-23 | 南京大学 | A kind of advanced waste treatment method of ion exchange resin and the integrated removing nitrate nitrogen of electrochemistry |
| CN109293141A (en) * | 2018-10-17 | 2019-02-01 | 河海大学 | A kind of ecological purifier and application method suitable for field ditch discharge outlet |
| CN112108132A (en) * | 2020-09-18 | 2020-12-22 | 扬州大学 | Composite nano material for synchronous nitrogen and phosphorus removal, preparation method and application |
| CN112624436A (en) * | 2021-01-18 | 2021-04-09 | 山东省水利科学研究院 | Phosphorus treatment system and method with zero discharge of wastewater |
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2008
- 2008-12-03 CN CNA2008101802803A patent/CN101423265A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898809A (en) * | 2009-05-29 | 2010-12-01 | 株式会社东芝 | Water treatment device |
| CN101817605A (en) * | 2010-05-10 | 2010-09-01 | 苏州市普滤得净化有限公司 | Process for directionally removing nitric acid/nitrous acid from drinking water |
| CN102320680B (en) * | 2011-06-14 | 2012-12-12 | 中国水产科学研究院淡水渔业研究中心 | Method for preparing ion exchanger for removing available phosphorous in water body |
| CN102320680A (en) * | 2011-06-14 | 2012-01-18 | 中国水产科学研究院淡水渔业研究中心 | A kind of preparation method of the body available phosphorus ionite that anhydrates |
| CN102398960A (en) * | 2011-09-29 | 2012-04-04 | 浙江农林大学 | Device and method for in-situ recovery of phosphorus in water body |
| CN102390879B (en) * | 2011-10-17 | 2013-10-30 | 南京大学 | Method for simultaneously and selectively removing nitrate and phosphate from secondary biochemical effluent |
| CN102390879A (en) * | 2011-10-17 | 2012-03-28 | 南京大学 | Method for simultaneously and selectively removing nitrate and phosphate from secondary biochemical effluent |
| CN102603120A (en) * | 2012-03-14 | 2012-07-25 | 河海大学 | Device and method for treating sewage with low ratio of carbon to nitrogen |
| CN102603120B (en) * | 2012-03-14 | 2014-03-26 | 河海大学 | Device and method for treating sewage with low ratio of carbon to nitrogen |
| CN102659264A (en) * | 2012-05-22 | 2012-09-12 | 麻克栋 | Ion exchange pretreatment method of softened/demineralized water |
| CN102659264B (en) * | 2012-05-22 | 2014-01-01 | 麻克栋 | Ion exchange pretreatment method of softened/demineralized water |
| CN104261596A (en) * | 2014-10-23 | 2015-01-07 | 湖北君集水处理有限公司 | Method for removing nitrate nitrogen from effluents of sewage plant with resin and method for treating resin regenerating liquid |
| CN104820081A (en) * | 2015-05-20 | 2015-08-05 | 中国水产科学研究院淡水渔业研究中心 | Method and device for preliminary evaluation of dead fish accident in heavy metal wastewater |
| CN108862472A (en) * | 2018-07-04 | 2018-11-23 | 南京大学 | A kind of advanced waste treatment method of ion exchange resin and the integrated removing nitrate nitrogen of electrochemistry |
| CN109293141A (en) * | 2018-10-17 | 2019-02-01 | 河海大学 | A kind of ecological purifier and application method suitable for field ditch discharge outlet |
| CN112108132A (en) * | 2020-09-18 | 2020-12-22 | 扬州大学 | Composite nano material for synchronous nitrogen and phosphorus removal, preparation method and application |
| CN112108132B (en) * | 2020-09-18 | 2021-06-04 | 扬州大学 | Composite nano material for synchronous nitrogen and phosphorus removal, preparation method and application |
| CN112624436A (en) * | 2021-01-18 | 2021-04-09 | 山东省水利科学研究院 | Phosphorus treatment system and method with zero discharge of wastewater |
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| CB03 | Change of inventor or designer information |
Inventor after: Zheng Shaokui Inventor after: Wang Changwei Inventor after: Yang Zhifeng Inventor after: Chen Jinjun Inventor before: Zheng Shaokui Inventor before: Yang Zhifeng Inventor before: Wang Changwei Inventor before: Chen Jinjun |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHENG SHAOKUI YANG ZHIFENG WANG ZHANGWEI CHEN JINJUN TO: ZHENG SHAOKUI WANG ZHANGWEI YANG ZHIFENG CHEN JINJUN |
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Application publication date: 20090506 |