CN101746870A - Method for removing nitrate in potable water - Google Patents
Method for removing nitrate in potable water Download PDFInfo
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- CN101746870A CN101746870A CN200810229280A CN200810229280A CN101746870A CN 101746870 A CN101746870 A CN 101746870A CN 200810229280 A CN200810229280 A CN 200810229280A CN 200810229280 A CN200810229280 A CN 200810229280A CN 101746870 A CN101746870 A CN 101746870A
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- nanofiltration membrane
- water
- nanofiltration
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- membrane
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Abstract
The invention relates to a method for removing nitrate in potable water. The method is realized through the following steps that: the pretreated micro-polluted source water is contained in a feed pond, and feed liquid enters a nanofiltration membrane filter assembly for filtration through a peristaltic pump. Concentrated water flows back to the feed pond. Exudate of nanofiltration membrane is collected and determined. The filtration time is three hours. A cooling water circulating system keeps the temperature of the nanofiltration system at 20 DEG C. The working pressure is 8bar, the flow is 700l/h and the flow rate is 5.3m/s. The nanofiltration membrane technology adopted by the invention has the irreplaceable advantages that the occupied area is small, the operation is simple, the selective interception of ions, organic matters and the like is realized, and the prospect of application in potable water production is wide with the reduction of the membrane production cost and the optimization of the membrane material.
Description
Technical field: the present invention relates to the removal method of nitrate, the method for nitrate removal belongs to the chemical-biological field in especially a kind of tap water.
Background technology: nitrate nitrogen (NO in the source water
3-N) pollute the environmental problem that become international.Nitrite, nitrate are the common chemical poisonous substances that causes poisoning disease in the Drinking Water.Long-term drinking can be caused diseases such as alimentary tract cancer, bladder cancer, thyropathy by the water of higher concentration nitrite and azotate pollution, so the regulation tap water NO of the World Health Organization
3The content of-N must not surpass 10mg/L.Think that at present ion exchange method and biological denitrification method all can be used for the removal of nitrate in the scale operation tap water.But ion exchange method has the frequent treating processes that waits complexity of regeneration; Still there are shortcomings such as complex process, operational management requirement height, slow, the required reactor volume of denitrification speed be huge in the biological denitrification method.
Summary of the invention: at above-mentioned the deficiencies in the prior art, the present invention adopts the nanofiltration membrane technology, and the method for nitrate removal in a kind of tap water is provided.
For achieving the above object, the technical solution used in the present invention is: the method for nitrate removal in a kind of tap water, realize by following step: be stored in the feed pond through pretreated micro-polluted source water, enter the nanofiltration membrane filter assemblies via peristaltic pump feed liquid and filter.Concentrate recirculation feed pond, nanofiltration membrane transudate are collected and are measured.Filtration time is 3 hours, and cooling water recirculation system remains on 20 ℃ with the nanofiltration system temperature, and employing pressure is 8bar, and flow is 700l/h, and flow velocity is 5.3m/s.
The nanofiltration membrane technology that the present invention adopts has that floor space is little, simple to operate, selectivity is held back ion or irreplaceable advantage such as organism, and, in tap water production, be with a wide range of applications along with the reduction of film production cost and the optimization of mould material.
Description of drawings:
Fig. 1 is a process flow sheet of the present invention.
Embodiment:
As shown in Figure 1: the method for nitrate removal in a kind of tap water, realize by following step: (add 50mg/L nitrate in river and the tap water through pretreated micro-polluted source water, pH is about 8) be stored in the feed pond (3), enter nanofiltration membrane filter assemblies (1) via peristaltic pump (2) feed liquid and filter.Concentrate recirculation feed pond (3), nanofiltration membrane transudate are collected and are measured.Filtration time is 3 hours, and cooling water recirculation system remains on 20 ℃ with the nanofiltration system temperature, and employing pressure is 8bar, and flow is 700l/h, and flow velocity is 5.3m/s.Former water is in moving process, because the effect of membrane pore size exclusion and surface charge, makes that nitrate is retained in dense water side in the water, and the water outlet side nitrate concentration reduces, and the clearance of nitrate is reached 80%.
Nanofiltration membrane filter assemblies (1) generation company is Amafilter Test Rig PSS1TZ (Holland), and the effective film area is 0.0044m
2(the UTC-20 nanofiltration membrane that Japanese Toray company produces).
Claims (1)
1. the method for nitrate removal in the tap water, realize by following step: be stored in the feed pond through pretreated micro-polluted source water, entering the nanofiltration membrane filter assemblies via peristaltic pump feed liquid filters, concentrate recirculation feed pond, nanofiltration membrane transudate are collected and are measured, and filtration time is 3 hours, cooling water recirculation system remains on 20 ℃ with the nanofiltration system temperature, employing pressure is 8bar, and flow is 700l/h, and flow velocity is 5.3m/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229280A CN101746870A (en) | 2008-12-04 | 2008-12-04 | Method for removing nitrate in potable water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810229280A CN101746870A (en) | 2008-12-04 | 2008-12-04 | Method for removing nitrate in potable water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101746870A true CN101746870A (en) | 2010-06-23 |
Family
ID=42474572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810229280A Pending CN101746870A (en) | 2008-12-04 | 2008-12-04 | Method for removing nitrate in potable water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101746870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249385A (en) * | 2021-12-02 | 2022-03-29 | 中煤科工集团西安研究院有限公司 | Water treatment process and index obtaining method of positive/negative charge nanofiltration device |
| CN114249384A (en) * | 2021-11-29 | 2022-03-29 | 中煤科工集团西安研究院有限公司 | Mixed nanofiltration reverse osmosis underground water purification system and treatment process |
-
2008
- 2008-12-04 CN CN200810229280A patent/CN101746870A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249384A (en) * | 2021-11-29 | 2022-03-29 | 中煤科工集团西安研究院有限公司 | Mixed nanofiltration reverse osmosis underground water purification system and treatment process |
| CN114249384B (en) * | 2021-11-29 | 2023-08-25 | 中煤科工集团西安研究院有限公司 | Mixed nanofiltration reverse osmosis groundwater purification system and treatment process |
| CN114249385A (en) * | 2021-12-02 | 2022-03-29 | 中煤科工集团西安研究院有限公司 | Water treatment process and index obtaining method of positive/negative charge nanofiltration device |
| CN114249385B (en) * | 2021-12-02 | 2023-08-15 | 中煤科工集团西安研究院有限公司 | Water treatment process and index obtaining method of charged positive/negative electric nanofiltration device |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100623 |