CN102491729B - Method for preparing zeolite water-supply sludge ceramsite for pretreating micro-polluted water - Google Patents
Method for preparing zeolite water-supply sludge ceramsite for pretreating micro-polluted water Download PDFInfo
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- CN102491729B CN102491729B CN2011103565185A CN201110356518A CN102491729B CN 102491729 B CN102491729 B CN 102491729B CN 2011103565185 A CN2011103565185 A CN 2011103565185A CN 201110356518 A CN201110356518 A CN 201110356518A CN 102491729 B CN102491729 B CN 102491729B
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- 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 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910021536 Zeolite Inorganic materials 0.000 title claims abstract description 40
- 239000010802 sludge Substances 0.000 title claims abstract description 40
- 239000010457 zeolite Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 23
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000011780 sodium chloride Substances 0.000 claims abstract description 7
- 235000012054 meals Nutrition 0.000 claims abstract 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract 3
- 239000008187 granular material Substances 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 13
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 12
- 238000001179 sorption measurement Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims 3
- 238000001035 drying Methods 0.000 claims 2
- 238000003756 stirring Methods 0.000 claims 2
- 230000004913 activation Effects 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 11
- 239000005416 organic matter Substances 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000945 filler Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- -1 contains haydite Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000006063 cullet Substances 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
本发明提供一种用于微污染水预处理的沸石给水污泥陶粒的制备方法，属于微污染水预处理技术领域。该陶粒由给水厂脱水污泥、改性沸石粉及造孔剂按一定比例，经以下方法制备的：给水厂脱水污泥干燥，粉碎，过筛，得干污泥；天然沸石粉碎，过筛，焙烧，氯化钠改性得改性沸石粉；上述干污泥、改性沸石粉及造孔剂分别以质量比50~60%、35~49%、1~5%比例均匀混合后在造粒机上造粒成球，得粒径2~7mm生料；生料烘干后焙烧得到烧结后的陶粒；将烧结后的陶粒自然冷却至室温后进行筛分得陶粒成品。本发明制备的陶粒表面粗糙、孔径丰富，用于微污染水生物预处理对氨氮及有机物有强化去除作用。The invention provides a method for preparing zeolite feedwater sludge ceramsite for pretreatment of slightly polluted water, and belongs to the technical field of pretreatment of slightly polluted water. The ceramsite is prepared from the dewatered sludge of the water supply plant, modified zeolite powder and pore-forming agent in a certain proportion by the following method: the dewatered sludge of the water supply plant is dried, pulverized, and sieved to obtain dry sludge; the natural zeolite is pulverized, Sieve, roast, and modify with sodium chloride to obtain modified zeolite powder; the above-mentioned dry sludge, modified zeolite powder and pore-forming agent are uniformly mixed at a mass ratio of 50-60%, 35-49%, and 1-5% respectively. Granulate into balls on a granulator to obtain raw meal with a particle size of 2-7mm; dry the raw meal and roast to obtain sintered ceramsite; cool the sintered ceramsite naturally to room temperature and sieve to obtain the finished ceramsite. The ceramsite prepared by the invention has a rough surface and rich pore diameters, and is used for micro-polluted aquatic biological pretreatment to strengthen the removal of ammonia nitrogen and organic matter.
Description
Technical field
The invention belongs to micro-polluted water preconditioning technique field, be specifically related to the preparation method for the pretreated zeolite feedwater of micro-polluted water sludge ceramsite.
Background technology
In recent years, along with the high speed development of industry, the quickening of urbanization process and the increase of agrochemicals kind and quantity, drinking water source, the most of cities and towns of China has been subject to pollution in various degree, majority has changed micro polluted source into, and the pollutent such as organism, ammonia nitrogen surpasses the standard of surface water environment quality III class water body in the water.Traditional handling technology of water supply coagulation-precipitation-filtration-sterilization is not only limited to organism in the micro polluted source and ammonia nitrogen removal effect, and also can occur in the treating processes endangering larger Chlorination Disinfection By-products, be difficult to reach the GB5749-2006 national drinking water standard.Studies show that, add that before traditional handling technology of water supply Biological Pretreatment Techniques is economy, the effective ways that solve dissolved organic matter and ammonia nitrogen in the micro polluted source.
In giving water treatment, Biological Pretreatment Techniques mostly adopts biomembrance process, and biofilter material is its core position.Common filtrate mainly contains haydite, plastic filler, soft-filler, combined stuffing etc. at present.Haydite is ripe, the most the most frequently used Biological Pretreatment filler.And conventional leca mainly is to rely on the physiological activity of the microorganism of growth on it to come organism and ammonia nitrogen in the degradation water, and when temperature was low, microbial activities weakened, and treatment effect is undesirable.
Zeolite is the general name that is the porousness hydrous alumino silicates crystal of frame shape structure, because its inside exists a lot of uniform micropores and passage and links each other, makes zeolite have huge surface-area, becomes the good carrier of microorganism growth.On the other hand, the huge active surface of zeolite makes it have powerful London force, and the positively charged ion that distributes in the zeolite hole and part frame oxygen have the mutual balance of negative charge, thereby forms powerful electric field around ion, so zeolite has again electrostatic force.The adding and cause the adsorptive power of zeolite strong especially of London force and electrostatic force, because the existence of electrostatic force, so that zeolite has preferential selection adsorption to polarity, unsaturated, easy polar molecule.Therefore, zeolite has stronger ion-exchange and absorption property to ammonia nitrogen in the water and polar organic matter pollutent.For taking full advantage of zeolite ammonia nitrogen and organism being had good absorption property, is again the good carrier of biological growth simultaneously, and natural zeolite has been used in the biology and processing of micro-polluted source water as filler after pulverizing appropriate particle size.But because the zeolite after pulverizing mostly is irregular granular, voidage is inhomogeneous, the large place of voidage, and aeration rate is too many, the place that voidage is little, aeration rate is too little, even produces anaerobic environment, and these all exert an influence to treatment effect.
Waterworks sludge results from the production process of city tap-water, be carried out rubbish mainly as waste at present and fill up processing, this had both increased the production cost of water supply plant, had taken again a large amount of land resources, so the resource utilization problem values of waterworks sludge must be inquired into.Because its composition and conventional clay-phase seemingly, have the investigator to use to sewage sludge and replace clay to produce haydite, but institute's haydite of producing are multiplex in the strong concrete making, thereby be used as material of construction.Haydite as material of construction, mainly emphasize the intensity of haydite, and the haydite that the micro-polluted source water Biological Pretreatment is used, except need satisfy certain intensity, also need surface irregularity, certain aperture is arranged, be conducive to biomembranous growth, therefore exist obviously different from haydite for building at product requirement and making method.Chinese patent application CN101955347 discloses " manufacture method of zeolite-glass porous light material ", and utilizing natural zeolite, cullet, waterworks sludge etc. is the main material production porous material.On the one hand, the porous material that this patent is produced is that thickness is the rectangular parallelepiped of 2cm, is not suitable for as microorganism carrier; On the other hand, this patent uses natural zeolite as raw material, because the natural zeolite endoporus is stopped up by plurality of impurities, absorption property is very limited.Up to now, also do not utilize waterworks sludge, modified zeolite powder etc. to make the report that is used for micro-polluted source water Biological Pretreatment haydite as basic raw material.
Summary of the invention
Above technical problem for the prior art existence, for strong absorption property and the biological oxidation of zeolite to ammonia nitrogen and polar organic matter combined, the problem of ammonia nitrogen and organic matter removal effect and solution waterworks sludge resource utilization in the reinforcement micro-polluted source water, the invention provides a kind ofly take water supply plant dewatered sludge, modified zeolite powder etc. as main raw material, add pore-forming material and fire the micro-polluted water Biological Pretreatment that forms with zeolite based feedwater sludge ceramsite and preparation method.
Preparation method's for the pretreated zeolite of micro-polluted water feedwater sludge ceramsite provided by the present invention concrete steps are as follows:
(1) preparation feedwater dewatered sludge: with the dewatered sludge of water supply plant water ratio 80wt%, at 105 ~ 110 ℃ of dry 2h, obtain the feedwater dewatered sludge of water ratio 52 wt%, then described feedwater dewatered sludge is pulverized in pulverizer, cross 80 mesh sieves, obtain particle diameter less than the Powdered feedwater dewatered sludge of 80 purposes;
(2) preparation modified zeolite powder: natural zeolite is pulverized with pulverizer, cross 80 mesh sieves, zeolite powder after sieving is put in the retort furnace roasting 2h under 350 ℃ of conditions, be cooled to after the room temperature in the adsorption column that zeolite powder packed into, then the sodium chloride solution with 1mol/L passes through described adsorption column with the flow velocity following current of 0.25m/h, after 10 times of sodium chloride solutions to the 1mol/L of zeolite volume pass through described adsorption column, modified active finishes, zeolite behind the taking-up modified active, in air dry oven, under 105 ~ 110 ℃ of conditions, obtain modified zeolite powder behind the dry 2h;
(3) raw material mixes: the Powdered feedwater dewatered sludge that step (1) is made, modified zeolite powder and the pore-forming material sodium bicarbonate that step (2) makes are respectively according to mass percent: 50 ~ 60%, 35 ~ 49% and 1 ~ 5% ratio, join to mix and mix 30min in the still, make compound;
(4) balling-up: the prepared compound of step (3) is transferred in the tumbling disk granulator, adds the laggard row granulation of entry, the quality that adds entry is 5% of described mixture quality, obtains particle diameter at the spherical raw material of 2 ~ 7mm;
(5) spherical raw material pre-treatment: the prepared spherical raw material of step (4) are put into air dry oven, and under 105 ~ 110 ℃ of conditions, dry 60min obtains the oven dry material;
(6) roasting: the prepared oven dry material of step (5) is put into retort furnace, setting the retort furnace temperature rise rate is 5 ℃/min, constant temperature calcining 30min after muffle furnace is raised to 1000 ℃ gradually from room temperature obtains the haydite after the roasting, then naturally cools to room temperature;
(7) the prepared haydite of step (6) is sieved, remove substandard product, obtain the haydite finished product of different-grain diameter.
The present invention compares with leca with the water treatment of routine and has the following advantages:
(1) the present invention replaces conventional clay to make haydite with the water supply plant dewatered sludge, both waterworks sludge has been carried out recycling, has protected again clay resource.
(2) because zeolite has a lot of holes and passage, and prepared filter material surface roughness and the specific surface area of the present invention all is significantly increased, be used for the micro-polluted source water Biological Pretreatment Techniques, be conducive to the biofilm growth of microorganism.
(3) because the introducing of zeolite, the prepared haydite of this invention is used for the micro-polluted water Biological Pretreatment, absorption and the biological degradation of zeolite are combined, ammonia nitrogen and organic matter removal have greatly been promoted, especially larger to the raising of ammonia nitrogen removal effect, the ability of anti-ammonia nitrogen impact load obviously strengthens.
Embodiment
Each raw materials quality is composed as follows among the embodiment 1-3 that present embodiment provides:
The feedwater dewatered sludge of embodiment 1:60%, 35% modified zeolite powder and 5% pore-forming material sodium bicarbonate.
The feedwater dewatered sludge of embodiment 2:50%, 49% modified zeolite powder and 1% pore-forming material sodium bicarbonate.
The feedwater dewatered sludge of embodiment 3:55%, 42% modified zeolite powder and 3% pore-forming material sodium bicarbonate.
Concrete preparation process is as follows:
(1) preparation feedwater dewatered sludge: with the dewatered sludge of water supply plant water ratio 80wt%, at 105 ~ 110 ℃ of dry 2h, obtain the feedwater dewatered sludge of water ratio 52 wt%, then described feedwater dewatered sludge is pulverized in pulverizer, cross 80 mesh sieves, obtain Powdered feedwater dewatered sludge;
(2) preparation modified zeolite powder: natural zeolite is pulverized with pulverizer, cross 80 mesh sieves, zeolite powder after sieving is put in the retort furnace roasting 2h under 350 ℃ of conditions, be cooled to after the room temperature in the adsorption column that zeolite powder packed into, then the sodium chloride solution with 1mol/L passes through described adsorption column with the flow velocity following current of 0.25m/h, after 10 times of sodium chloride solutions to the 1mol/L of zeolite volume pass through described adsorption column, modified active finishes, zeolite behind the taking-up modified active, in air dry oven, under 105 ~ 110 ℃ of conditions, obtain modified zeolite powder behind the dry 2h;
(3) raw material mixes: the Powdered feedwater dewatered sludge that step (1) is made, the modified zeolite powder that step (2) makes and pore-forming material sodium bicarbonate join to mix and mix 30min in the still, make compound;
(4) balling-up: the prepared compound of step (3) is transferred in the tumbling disk granulator, adds the laggard row granulation of entry, the quality that adds entry is 5% of described mixture quality, obtains particle diameter at the spherical raw material of 2 ~ 7mm;
(5) spherical raw material pre-treatment: the prepared spherical raw material of step (4) are put into air dry oven, and under 105 ~ 110 ℃ of conditions, dry 60min obtains the oven dry material;
(6) roasting: the prepared oven dry material of step (5) is put into retort furnace, setting the retort furnace temperature rise rate is 5 ℃/min, constant temperature calcining 30min after muffle furnace is raised to 1000 ℃ gradually from room temperature obtains the haydite after the roasting, then naturally cools to room temperature;
(7) the prepared haydite of step (6) is sieved, remove substandard product, obtain the haydite finished product of different-grain diameter.
The prepared haydite of embodiment 1-3 all meets the relevant regulations of " the artificial ceramic grain filter of water treatment ".
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103565185A CN102491729B (en) | 2011-11-11 | 2011-11-11 | Method for preparing zeolite water-supply sludge ceramsite for pretreating micro-polluted water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103565185A CN102491729B (en) | 2011-11-11 | 2011-11-11 | Method for preparing zeolite water-supply sludge ceramsite for pretreating micro-polluted water |
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| CN102491729A CN102491729A (en) | 2012-06-13 |
| CN102491729B true CN102491729B (en) | 2013-04-03 |
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| CN103028384A (en) * | 2012-12-03 | 2013-04-10 | 姜英杰 | Preparation method of high-capacity fluorion adsorbent |
| CN103991971B (en) * | 2014-05-30 | 2016-01-20 | 东北大学 | A kind of irrigation canals and ditches matrix and compound method thereof hindering ammonia nitrogen in control rice field water-break |
| CN105130391B (en) * | 2015-07-10 | 2017-11-17 | 武汉理工大学 | The method for preparing light ceramic using bottom mud in lake and municipal sludge microwave sintering |
| CN106076252A (en) * | 2016-06-15 | 2016-11-09 | 北京建筑大学 | A kind of method utilizing waterworks sludge preparation denitrogenation dephosphorizing adsorbent simultaneously |
| CN110721662A (en) * | 2019-10-30 | 2020-01-24 | 安徽工业大学 | A kind of preparation method and recovery method of modified zeolite powder for simultaneously removing natural organic matter and ammonia nitrogen in slightly polluted water |
| CN111087199A (en) * | 2019-12-20 | 2020-05-01 | 南通斐腾新材料科技有限公司 | Preparation method of porous hollow zeolite particles for adsorbing VOCs (volatile organic compounds) |
| CN112174294A (en) * | 2020-08-28 | 2021-01-05 | 江苏河清海晏环境有限公司 | Preparation method of composite filler for advanced sewage treatment |
| CN112844304A (en) * | 2021-02-05 | 2021-05-28 | 苏州科技大学 | Sodium pyrophosphate modified water purification sludge/zeolite composite adsorbent and preparation method and application thereof |
| CN113402012B (en) * | 2021-06-02 | 2023-12-12 | 浙江工业大学 | Aerobic composting reinforced horizontal subsurface flow constructed wetland denitrification device and application |
| CN115608340B (en) * | 2022-10-11 | 2024-02-02 | 青岛科技大学 | Magnetic ceramsite adsorbent for removing heavy metal copper ions in water and preparation method thereof |
| CN115845931B (en) * | 2022-11-16 | 2024-09-03 | 浙江农林大学暨阳学院 | Persulfate activator based on reverse osmosis seawater desalination plant sludge and preparation method thereof |
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Effective date of registration: 20141210 Address after: 201802 Shanghai city Jiading District Nanxiang Street No. 1 Lane 276 democracy building 602 Patentee after: Ding Meihua Address before: 243002 Ma'anshan, East Lake Road, Anhui, No. 59 Patentee before: Anhui University of Technology |
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Application publication date: 20120613 Assignee: Shanghai Jiang Ke Industrial Equipment Co., Ltd. Assignor: Ding Meihua Contract record no.: 2015310000022 Denomination of invention: Method for preparing zeolite water-supply sludge ceramsite for pretreating micro-polluted water Granted publication date: 20130403 License type: Exclusive License Record date: 20150213 |
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