CN1644500A - Method for removing ammonia and nitrogen in raw water with powdery zeolite - Google Patents
Method for removing ammonia and nitrogen in raw water with powdery zeolite Download PDFInfo
- Publication number
- CN1644500A CN1644500A CN 200410099024 CN200410099024A CN1644500A CN 1644500 A CN1644500 A CN 1644500A CN 200410099024 CN200410099024 CN 200410099024 CN 200410099024 A CN200410099024 A CN 200410099024A CN 1644500 A CN1644500 A CN 1644500A
- Authority
- CN
- China
- Prior art keywords
- water
- zeolite
- zeolite powder
- ammonia nitrogen
- ammonia
- 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
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 60
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000010457 zeolite Substances 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 19
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title abstract description 10
- 229910021529 ammonia Inorganic materials 0.000 title abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract 8
- 229910052757 nitrogen Inorganic materials 0.000 title abstract 4
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000000701 coagulant Substances 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 7
- 238000001914 filtration Methods 0.000 claims abstract description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 46
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 230000015271 coagulation Effects 0.000 claims description 12
- 238000005345 coagulation Methods 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002384 drinking water standard Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 abstract description 8
- 238000011069 regeneration method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000035622 drinking Effects 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000003651 drinking water Substances 0.000 description 5
- 235000020188 drinking water Nutrition 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229940037003 alum Drugs 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005660 chlorination reaction Methods 0.000 description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000003851 biochemical process Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000001932 seasonal effect Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
A process for removing ammonia and nitrogen in raw water by zeolite powder is carried out by zeolite powder agitating with water, mixing preparing zeolite powder water solution with 2-3wt%, adding the water solution and coagulant into raw water to treat with adding account 100-500mg/L zeolite powder and 20-30mg/L coagulant, mixing agitating for 10-30 seconds, pumping the coagulated absorbed raw water into settling chamber for 5-10mins, and entering into sand filtering pool with 8-10m/hr speed. The content of ammonia and nitrogen is <0.5mg/L, etch is 0.3-0.6NTU, according to national drinking standard. It achieves simple process, low cost, to prevent regeneration of zeolite powder and to rapid remove ammonia and nitrogen in raw water.
Description
Technical field
The present invention relates to a kind of technology of removing ammonia nitrogen in the former water, this technology can be in removing former water enhanced coagulation technology in the ammonia nitrogen, therefore it is lower to be specially adapted to turbidity, and the ammonia nitrogen removal technology of the natural former water that ammonia nitrogen concentration is higher belongs to and strengthens conventional drinking water treatment technology.
Background technology
The increase that important symbol is an ammonia nitrogen concentration in the water body that drinking water source is polluted.Though itself does not directly work the mischief ammonia nitrogen to HUMAN HEALTH, its existence meeting impacts water quality and treatment process, and therefore, the technology of removing ammonia nitrogen in the former water also is current drinking water treatment Study on Technology emphasis.
At present, the technology that is usually used in removing ammonia nitrogen in the former water mainly contains four kinds of biochemical process, blow-off method, break point chlorination method and absorption methods.Biochemical process is the most effective technology of removal ammonia nitrogen that extensively adopts at present, mainly contains contact oxidation method and ozone biological activated carbon method.Contact oxidation method needs bigger processing structures, and investment is big, and the effect of removing ammonia nitrogen influenced by water temperature very big, poor removal effect during winter low temperature, therefore, for the higher or northern area of ammonia nitrogen in the water in winter of south, the application of this technology is restricted.The investment of ozone biological activated carbon is very big, and the shortcoming of removing the ammonia nitrogen weak effect is still arranged winter.
When blow-off method was lower than 0 ℃ in envrionment temperature, Ammonia blowing-out tower just can't be worked, and calcium carbonate scale deposits in the filler of stripping tower in the water, can cause stripping efficient to reduce.
Break point chlorination is water purification plant's removal ammonia nitrogen method commonly used, but break point chlorination can increase the dosage of chlorine greatly, increases water producing cost, and the disinfection byproduct (DBP) content in the water also can increase greatly, influences drinking-water quality.
A kind of technology of utilizing zeolite to remove ammonia nitrogen is arranged in the absorption method.Zeolite is widely distributed in China, and reserves are big, and is cheap, therefore, utilizes zeolite to remove ammonia nitrogen and has good application prospects.At present, be to adopt the granular zeolite of 0.6-1.6 millimeter particle diameter to filter and adsorb for the application of zeolite and research as filtrate, the ammonia-nitrogen content in the former water is reduced.The effect of ammonia nitrogen is better though granular zeolite is removed, and weak point is that loading capacity is less, causes losing efficacy in the short period of time, and the regeneration period is short.Therefore, there is big problem in actual applications in granular zeolite, for example, needs repeated regeneration, and this not only causes the water producing cost height, and to very big influence is also arranged in the production management.And for example in order to prolong the zeolite regeneration cycle, adopt ozone biozeolite technology, but because the specific surface area of zeolite is significantly less than gac, therefore, the removal effect of this technology is not as ozone BAC process (this technology investment big, cryogenic effect poor), and its investment and running cost are also higher.
Summary of the invention
The object of the present invention is to provide the method that a kind of technology is simple, with low cost, can remove the ammonia nitrogen in the lower former water of turbidity effectively, this method has overcome the shortcoming of the low removal ammonia nitrogen weak effect that causes of ammonia nitrogen concentration seasonal variation and turbidity in the former water, has guaranteed drinking-water quality.
To achieve these goals, the present invention is to after the studying for a long period of time of zeolite adsorption mechanism, adopted following technical scheme: at first, adopting median size is the zeolite powder of 10-14 μ m, and powdery zeolite and water are mixed the zeolite powder aqueous solution that is mixed with the 2-3% weight percent.Be 1-2mg/L with the zeolite powder aqueous solution and the coagulant dosage for preparing to ammonia nitrogen concentration then, turbidity is in the pending former water of 5-10NTU, dosage can be regulated according to the ammonia-nitrogen content of raw water quality, whenever go up and state pending former water and add the 100-500mg zeolite powder, also add the 20-30mg coagulating agent simultaneously, mix and stir 10-30 second.Then will go in the settling tank to precipitate through the raw water pump of Coagulation and Adsorption reaction, the residence time be 5-10 minute in settling tank.Enter sand filter at last, with the water outlet of handling well that 8-10 rice/hour filtering velocity is come out from sand filter, after testing, the ammonia-nitrogen content of this water outlet is lower than 0.5mg/L, and turbidity is 0.3-0.6NTU, meets national drinking water standard fully.The filter residue that stays at the bottom of the settling tank is worked as mud discharging, has avoided the regeneration problem.
The present invention has following advantage:
1. because the present invention has adopted zeolite powder, when the ammonia nitrogen concentration of intaking is 2mg/L, when the water outlet ammonia nitrogen concentration is 0.4mg/L, weight is that the ion exchange capacity of the powdery zeolite of 100g can reach 70mmol, and the ion exchange capacity of the granular zeolite of same weight only is 14～20mmol, thus the present invention to adopt the effect of the removal ammonia nitrogen of powdery zeolite be 250%～400% of granular zeolite.
2. for the lower former water of turbidity, because the particle collision number of times reduces, coagulation effect is poor.The present invention adds powdery zeolite and can improve particle collision speed and increase flocs unit density, improves coagulation effect.Even, also can make the ammonia nitrogen removal effect in the lower former water of turbidity up to standard therefore at low-temperature condition.
3. because the present invention has also added a small amount of coagulating agent, powdery zeolite and coagulation have synergy, can bring into play the effect of removing ammonia nitrogen better, and be influential because the larger molecular organics in the water is removed ammonia nitrogen to zeolite, coagulation can be removed larger molecular organics effectively, improves and removes the ammonia nitrogen effect; Powdery zeolite can increase the density of flocs unit simultaneously, promotes coagulation.Technology energy enhanced coagulation therefore of the present invention reduces delivery turbidity, makes the lower former water of turbidity also can reach ammonia-nitrogen content and is lower than 0.5mg/L, and turbidity is 0.3-0.6NTU.
4. the granular zeolite of selling on the market and the price of powdery zeolite are basic identical, and approximately per ton is 1000 yuans.If do not consider the regeneration expense of granular zeolite, under the ammonia nitrogen situation of removing same amount, the expense that powdery zeolite is removed ammonia nitrogen is 1/3～1/4 of a granular zeolite only, has valuable economic benefit.
5. because the present invention adopts the ammonia nitrogen in the powdery zeolite planar water, do not need to increase structures and equipment, just can tackle the variation of seasonal ammonia nitrogen concentration effectively, obtain removal effect preferably, and can adjust the powdery zeolite dosage at any time according to raw water quality, therefore have the advantage of saving one-time investment and reducing working cost.
Description of drawings
Fig. 1 is a process flow diagram of the present invention
Embodiment
At first, the powdery zeolite that the present invention adopts is the Jinyun county, Zhejiang province zeolite, physico-chemical property that it is main such as following table:
Physical index
| Proportion | ????2.16 | The aperture | 3.5～4 dusts |
| Hardness | ????3～4 | Specific surface area | ????70m 3/g |
| Thermostability | ????750℃ | Silica alumina ratio | ????4.25～5.25 |
| Water regain after 300 ℃ of activation | 12 grams/100 grams | Median size | ????10-14μm |
Embodiment 1
The first preparation zeolite powder aqueous solution, the median size in showing in employings is the zeolite powder of 14 μ m, according to powdery zeolite: it is 2% the zeolite powder aqueous solution that water=2: 100 weight percent is mixed with concentration.Be 2mg/L with the zeolite powder aqueous solution for preparing with the ammonia nitrogen concentration that pump is added in the mixing pit then, turbidity is in the pending former water of 5NTU, dosage is 500mg/L, be that every liter of pending former water adds the zeolite powder aqueous solution that the 500mg powdery zeolite is made, go back dosing coagulant (commercially available alum) 30mg/L simultaneously, be that every liter of pending former water adds 30mg alum, mix to stir and just finished the absorption coagulation in 10 seconds.Then will go in the settling tank to precipitate through the raw water pump of Coagulation and Adsorption reaction, the residence time be to finish precipitate and separate in 5 minutes in settling tank.Because the powdery zeolite particle diameter is little, absorption ammonia nitrogen speed is fast, so can finish the absorption to ammonia nitrogen fast, has increased adding of alum simultaneously again, so can effectively reduce the settling time of coagulation-flocculation body when removing ammonia nitrogen.Filter by sand filter at last, find after testing that with the water outlet that 8 meters/hour filtering velocitys are come out its ammonia-nitrogen content is lower than 0.5mg/L, turbidity is 0.3mg/L, meets national drinking water standard fully.The filter residue of settling tank bottom is worked as mud discharging, has avoided the regeneration problem.
Embodiment 2
Adopting above-mentioned median size during the preparation zeolite powder aqueous solution is the zeolite powder of 10 μ m, and according to powdery zeolite: water=weight percent was mixed with the zeolite powder aqueous solution in 3: 100.Then the zeolite powder aqueous solution for preparing and coagulating agent iron trichloride being added to ammonia nitrogen concentration is 1mg/L, turbidity is in the pending former water of 10 NTU, dosage is 100mg/L, be that every liter of pending former water adds the zeolite powder aqueous solution that the 100mg powdery zeolite is made, go back dosing coagulant iron trichloride 20mg/L simultaneously, be that every liter of pending former water adds the 20mg iron trichloride, mixed churning time 30 seconds.Then will go in the settling tank to precipitate through the raw water pump of Coagulation and Adsorption reaction, the residence time be 10 minutes.The water outlet of coming out with 10 meters/hour filtering velocitys by sand filter at last finds that after testing its ammonia-nitrogen content is lower than 0.5mg/L, and turbidity is 0.6mg/L, meets national drinking water standard fully.The filter residue of settling tank bottom is worked as mud discharging, has avoided the regeneration problem.Technology of the present invention has shortened the settling time of coagulation-flocculation body, has therefore reduced the structures size or increased to handle the water yield.
Claims (1)
1. powdery zeolite is removed the method for ammonia nitrogen in the former water, it is characterized in that: at first, be that powdery zeolite and the water of 10-14 μ m mixes the zeolite powder aqueous solution that is mixed with the 2-3% weight percent with median size; Then, is 1-2mg/L with the zeolite powder aqueous solution and the coagulant dosage that prepare to ammonia nitrogen concentration, turbidity is in the pending former water of 5-10NTU, and dosage is to add 100-500mg zeolite powder and 20-30mg coagulating agent in every liter of pending former water, mixes and stirs 10-30 second; Then, will go in the settling tank to precipitate through the raw water pump of Coagulation and Adsorption reaction, the residence time be 5-10 minute in settling tank; At last, enter sand filter, the ammonia-nitrogen content of the water outlet of handling well of coming out from sand filter with 8-10 rice/hour filtering velocity is lower than 0.5mg/L, and turbidity is 0.3-0.6NTU, meets national drinking water standard fully, and the filter residue that stays at the bottom of the settling tank is worked as mud discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100990243A CN1330583C (en) | 2004-12-27 | 2004-12-27 | Method for removing ammonia and nitrogen in raw water with powdery zeolite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100990243A CN1330583C (en) | 2004-12-27 | 2004-12-27 | Method for removing ammonia and nitrogen in raw water with powdery zeolite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1644500A true CN1644500A (en) | 2005-07-27 |
| CN1330583C CN1330583C (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100990243A Expired - Fee Related CN1330583C (en) | 2004-12-27 | 2004-12-27 | Method for removing ammonia and nitrogen in raw water with powdery zeolite |
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| CN (1) | CN1330583C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127737A1 (en) * | 2010-04-16 | 2011-10-20 | 南京大学 | Modified molecular sieve with high selectivity to ammonia nitrogen in waste water and preparation method thereof |
| CN102336482A (en) * | 2011-06-13 | 2012-02-01 | 桂林理工大学 | Method for treating low-temperature low-turbidity source water through combination of zeolite powder and iron salt |
| CN107129000A (en) * | 2017-07-03 | 2017-09-05 | 吉林大学 | A kind of method that utilization artificial zeolite cellulose acetate composite removes ammonia nitrogen in super low concentration ammonia nitrogen waste water |
| CN109851013A (en) * | 2019-01-21 | 2019-06-07 | 四川清和科技有限公司 | A kind of method that PAC handles low temperature, low turbidity waste sewage |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5855838B2 (en) * | 1976-08-23 | 1983-12-12 | 株式会社日立製作所 | Method for removing ammonia nitrogen from wastewater |
| JPS5848237B2 (en) * | 1977-09-02 | 1983-10-27 | 株式会社日立製作所 | How to remove ammonia nitrogen from wastewater |
| US4765892A (en) * | 1984-08-29 | 1988-08-23 | Applied Industrial Materials Corporation | Sand filter media and an improved method of purifying water |
| JPH08257553A (en) * | 1995-03-24 | 1996-10-08 | Ngk Insulators Ltd | Waste water treatment method by zeolite |
| AUPP860899A0 (en) * | 1999-02-11 | 1999-03-04 | Zeolite Australia Limited | Process for the removal of suspended and other material from waste water |
| CN1485281A (en) * | 2002-09-24 | 2004-03-31 | 上海理工大学 | Process of treating ammonia nitrogen waste water by 13X molecular sieve |
-
2004
- 2004-12-27 CN CNB2004100990243A patent/CN1330583C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127737A1 (en) * | 2010-04-16 | 2011-10-20 | 南京大学 | Modified molecular sieve with high selectivity to ammonia nitrogen in waste water and preparation method thereof |
| AU2010350932B2 (en) * | 2010-04-16 | 2014-04-17 | Nanjing University | Modified molecular sieve with high selectivity to ammonia nitrogen in waste water and preparation method thereof |
| CN102336482A (en) * | 2011-06-13 | 2012-02-01 | 桂林理工大学 | Method for treating low-temperature low-turbidity source water through combination of zeolite powder and iron salt |
| CN107129000A (en) * | 2017-07-03 | 2017-09-05 | 吉林大学 | A kind of method that utilization artificial zeolite cellulose acetate composite removes ammonia nitrogen in super low concentration ammonia nitrogen waste water |
| CN107129000B (en) * | 2017-07-03 | 2023-05-26 | 吉林大学 | Method for removing ammonia nitrogen in ultralow-concentration ammonia nitrogen wastewater by using artificial zeolite-cellulose acetate composite material |
| CN109851013A (en) * | 2019-01-21 | 2019-06-07 | 四川清和科技有限公司 | A kind of method that PAC handles low temperature, low turbidity waste sewage |
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| Publication number | Publication date |
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| CN1330583C (en) | 2007-08-08 |
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Owner name: SHANGHAI RUNNING WATER SHIBEI CO., LTD. Free format text: FORMER OWNER: SHANGHAI RUNNING WATER SHIBEI SCIENCE CO., LTD. Effective date: 20091016 Owner name: SHANGHAI URBAN WATER RESOURCES DEVELOPMENT AND UTI Free format text: FORMER OWNER: SHANGHAI RUNNING WATER SHIBEI CO., LTD. Effective date: 20091016 |
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Effective date of registration: 20091016 Address after: No. 230, Xuchang Road, Shanghai, China: 200086 Patentee after: SHANGHAI NATIONAL ENGINEERING RESEARCH CENTER OF URBAN WATER RESOURCES Co.,Ltd. Address before: No. 206 Siping Road, Shanghai, China: 200086 Co-patentee before: Shanghai Tongji Asset Management Ltd. Patentee before: Shanghai running water north city Co.,Ltd. Effective date of registration: 20091016 Address after: No. 206 Siping Road, Shanghai, China: 200086 Co-patentee after: Shanghai Tongji Asset Management Ltd. Patentee after: Shanghai running water north city Co.,Ltd. Address before: No. 206 Siping Road, Shanghai, China: 200086 Co-patentee before: Tongji University Patentee before: Shanghai Waterworks Shibei Co.,Ltd. |
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Granted publication date: 20070808 Termination date: 20181227 |