CN102531253A - Method and process for implementing resource utilization of nitrate-polluted underground water - Google Patents
Method and process for implementing resource utilization of nitrate-polluted underground water Download PDFInfo
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- CN102531253A CN102531253A CN2012100554215A CN201210055421A CN102531253A CN 102531253 A CN102531253 A CN 102531253A CN 2012100554215 A CN2012100554215 A CN 2012100554215A CN 201210055421 A CN201210055421 A CN 201210055421A CN 102531253 A CN102531253 A CN 102531253A
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Abstract
The invention relates to a method and a process for implementing the resource utilization of nitrate-polluted underground water. An electroosmosis technology, an ion exchange technology and an ion exchange resin electro-regeneration technology are applied to removing nitrate from the underground water. The purification of the underground water and the resource utilization of nitrate are implemented by a treatment system for treating the nitrate in the underground water, which consists of three electrodialyzers and one packed bed electrodialyzer. The nitrate in the underground water can be used as a liquid nitrogen fertilizer for plants after being subjected to multi-step concentration by the electrodialyzers. The underground water is subjected to electroosmosis and ion exchange adsorption treatment, and the water quality can reach the standard of drinking water. According to the invention, the resource utilization of the nitrate-polluted underground water is implemented and the method and the process have no secondary pollution.
Description
Technical field
The present invention relates to a kind of method and technology that realizes the azotate pollution groundwater resourceization, belong to the resource environment field.
Background technology
In recent years because chemical fertilizer application and sewage irrigation cause China's groundwater azotate pollution to be on the rise.At present, nearly 3,500 ten thousand people of China are drinking the water that contains high nitrate nitrogen.Nitrate salt is converted to nitrite nitrogen through behind the Digestive tract in human body, the latter can combine with oxyphorase to form methemoglobin, makes blood lose oxygen carrying capacity, causes patient respiratory difficulty even dead; Nitrite can also synthesize the strong carcinogen NSC 223080 in human body, can bring out digestive system.The maximum permissible concentration of nitrate nitrogen is 11.3mg/L in WHO and the European Union's regulation tap water, and recommending to allow level value is 5.6mg/L; The content of nitrate nitrogen does not allow to surpass 10mg/L in U.S.'s tap water; III class drinking water standard regulation nitrate nitrogen content is no more than 20mg/L in China GB/T 14848-93 quality of groundwater standard.
At present, the nitrate removal technology is divided into physical chemistry, chemistry, biotechnology etc. substantially.Physico-chemical processes mainly contains distillation, electrodialysis, r-o-, ion exchange method etc., owing to exist processing costs than problems such as higher, pre-treatment requirement height, easy generation of secondary pollution, on using, receives certain restriction; Thereby chemical method is to utilize the nitrate salt in certain reductive agent reductive water to remove nitrate salt, and studying more reductive agent at present has metal Fe
0, ferrous iron Fe
2+Deng, because the ratio of reaction conditions is strict, by product is prone to cause secondary pollution etc., make chemical method in application, also receive certain restriction; Utilize denitrifying bacteria that nitrate salt is degraded to the bioprocess of nitrogen, generally experience by NO
3 -→ NO
2 -→ NO → N
2O → N
2Process, the difficult control of being of limited application of biological process, condition and have secondary pollution.
Above-mentioned various treatment technologies all are that the nitrate salt in the water is handled as a kind of pollutent, and in fact nitrate salt is one of important source of the necessary nitrogenous fertilizer of plant-growth.Therefore, if can then not only can realize phreatic purification, and can realize the resource utilization of nitrate salt through appropriate means with the liquid nitrogenous fertilizer of the nitrate salt simmer down to available in the water.
Summary of the invention
The objective of the invention is electrodialytic technique, ion exchange technique, electric regeneration of ion exchange resin technology are applied to the removal of nitrate in groundwater; Through the combination of many electrodialyzers and filling bed electrodialyzer, realize the resource utilization of phreatic purification and nitrate salt.
For achieving the above object, the present invention takes following technical scheme: the treatment system of being made up of groundwater azotate 3 electrodialyzers and 1 filling bed electrodialyzer.The underground water that contains nitrate salt at first gets into electrodialyzer No. 1, and the dense water after the processing gets into No. 2 electrodialyzers, and fresh water gets into No. 3 electrodialyzers; Dense water is after No. 2 electrodialyzers are handled, and the nitrate concentration in the water outlet of dense chamber reaches the concentration that can make liquid nitrogenous fertilizer, enters the dense water tank of nitrate salt, and electrodialyzer is returned in the water outlet of light chamber No. 1; Fresh water is after No. 3 electrodialyzers are handled, and electrodialyzer is returned in the water outlet of dense chamber No. 1, and the water outlet of light chamber gets into filling bed electrodialyzer; Ion-exchange membrane in the filling bed electrodialyzer and ion exchange resin is remaining nitrate salt in the planar water under no impressed voltage situation at first, and the water outlet after the purification enters light chamber tank; After ion-exchange membrane in the filling bed electrodialyzer and ion exchange resin absorption were saturated, impressed voltage was realized some regeneration, and the dense water of regenerated returns with No. 2 electrodialyzers.
The invention has the advantages that: the nitrate salt in the underground water is after the multistep of electrodialyzer concentrates, and the liquid nitrogenous fertilizer that can be used as plant uses, and after underground water process electrodialysis and the IX absorption processing, water quality can reach drinking water standard.The present invention has realized the phreatic resource utilization of azotate pollution, non-secondary pollution.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Among the figure: (1) water inlet, (2) No. 1 electrodialyzers, (3) No. 2 electrodialyzers, (4) No. 3 electrodialyzers, the dense water tank of (5) nitrate salt, (6) filling bed electrodialyzer, (7) fresh water tank.
Embodiment
Below in conjunction with Fig. 1 the present invention is further specified.
The underground water (1) that contains nitrate salt at first gets into No. 1 electrodialyzer (2), and the dense water after the processing gets into No. 2 electrodialyzers (3), and fresh water gets into No. 3 electrodialyzers (4); Dense water is after No. 2 electrodialyzers (3) are handled, and the nitrate concentration in the water outlet of dense chamber reaches the concentration that can make liquid nitrogenous fertilizer, enters the dense water tank of nitrate salt (5), and the water outlet of light chamber is returned with No. 1 electrodialyzer (2); Fresh water is after No. 3 electrodialyzers (4) are handled, and the water outlet of dense chamber is returned with No. 1 electrodialyzer (2), and the water outlet of light chamber gets into filling bed electrodialyzer (6); Ion-exchange membrane in the filling bed electrodialyzer (6) and ion exchange resin is remaining nitrate salt in the planar water under no impressed voltage situation at first, and the water outlet after the purification enters light chamber tank (7); After ion-exchange membrane in the filling bed electrodialyzer and ion exchange resin absorption were saturated, impressed voltage was realized some regeneration, and the dense water of regenerated returns No. 2 electrodialyzers (3).
Claims (3)
1. method and a technology that realizes the azotate pollution groundwater resourceization is the removal that electrodialytic technique, ion exchange technique, electric regeneration of ion exchange resin technology is applied to nitrate in groundwater; Through form the treatment system of groundwater azotate by 3 electrodialyzers and 1 filling bed electrodialyzer, realize the resource utilization of phreatic purification and nitrate salt.
2. a kind of method and technology that realizes the azotate pollution groundwater resourceization according to claim 1; It is characterized in that: the nitrate salt in the underground water is after the multistep of electrodialyzer concentrates; The liquid nitrogenous fertilizer that can be used as plant uses; And after underground water process electrodialysis and the IX absorption processing, water quality can reach drinking water standard.
3. a kind of method and technology that realizes the azotate pollution groundwater resourceization according to claim 1; It is characterized in that: ion-exchange membrane in the filling bed electrodialyzer and ion exchange resin is remaining nitrate salt in the planar water under no impressed voltage situation at first, and the water outlet after the purification enters light chamber tank; After ion-exchange membrane in the filling bed electrodialyzer and ion exchange resin absorption were saturated, impressed voltage was realized some regeneration, and the dense water of regenerated returns electrodialyzer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100554215A CN102531253A (en) | 2012-03-06 | 2012-03-06 | Method and process for implementing resource utilization of nitrate-polluted underground water |
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| CN2012100554215A CN102531253A (en) | 2012-03-06 | 2012-03-06 | Method and process for implementing resource utilization of nitrate-polluted underground water |
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| CN102531253A true CN102531253A (en) | 2012-07-04 |
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| CN2012100554215A Pending CN102531253A (en) | 2012-03-06 | 2012-03-06 | Method and process for implementing resource utilization of nitrate-polluted underground water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892543A (en) * | 2017-04-28 | 2017-06-27 | 南京环保产业创新中心有限公司 | The method that depth removes Coal Gas Washing Cycling Water nitrate nitrogen |
Citations (6)
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|---|---|---|---|---|
| CN1087880A (en) * | 1992-12-07 | 1994-06-15 | 中国人民解放军防化指挥工程学院 | The treatment process of nitrite and equipment thereof in the underground drinking water |
| CN1421399A (en) * | 2001-11-30 | 2003-06-04 | 财团法人工业技术研究院 | Electric dialyzer bioreactor and denitrifying method of water containing nitrate |
| CN1785831A (en) * | 2005-11-18 | 2006-06-14 | 哈尔滨工业大学 | Method of removing ammonia nitrogen in water by using electrodialysis |
| CN101815678A (en) * | 2007-06-19 | 2010-08-25 | 菲尔姆斯有限责任公司 | Process for mixed chemical/electrochemical treatment of a liquid medium loaded with nitrates, device for treating such a liquid medium and applications |
| CN101891316A (en) * | 2010-07-07 | 2010-11-24 | 太原理工大学 | Process for treating nitrogen-containing wastewater by ion exchange and reclaiming ammonium nitrate |
| CN202124506U (en) * | 2011-06-22 | 2012-01-25 | 东北石油大学 | Device for removing nitrate nitrogen in ground water |
-
2012
- 2012-03-06 CN CN2012100554215A patent/CN102531253A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1087880A (en) * | 1992-12-07 | 1994-06-15 | 中国人民解放军防化指挥工程学院 | The treatment process of nitrite and equipment thereof in the underground drinking water |
| CN1421399A (en) * | 2001-11-30 | 2003-06-04 | 财团法人工业技术研究院 | Electric dialyzer bioreactor and denitrifying method of water containing nitrate |
| CN1785831A (en) * | 2005-11-18 | 2006-06-14 | 哈尔滨工业大学 | Method of removing ammonia nitrogen in water by using electrodialysis |
| CN101815678A (en) * | 2007-06-19 | 2010-08-25 | 菲尔姆斯有限责任公司 | Process for mixed chemical/electrochemical treatment of a liquid medium loaded with nitrates, device for treating such a liquid medium and applications |
| CN101891316A (en) * | 2010-07-07 | 2010-11-24 | 太原理工大学 | Process for treating nitrogen-containing wastewater by ion exchange and reclaiming ammonium nitrate |
| CN202124506U (en) * | 2011-06-22 | 2012-01-25 | 东北石油大学 | Device for removing nitrate nitrogen in ground water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892543A (en) * | 2017-04-28 | 2017-06-27 | 南京环保产业创新中心有限公司 | The method that depth removes Coal Gas Washing Cycling Water nitrate nitrogen |
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Application publication date: 20120704 |