CN102206003B - Preparation method of modified pumice packing for purifying sewage - Google Patents
Preparation method of modified pumice packing for purifying sewage Download PDFInfo
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- CN102206003B CN102206003B CN2011101154520A CN201110115452A CN102206003B CN 102206003 B CN102206003 B CN 102206003B CN 2011101154520 A CN2011101154520 A CN 2011101154520A CN 201110115452 A CN201110115452 A CN 201110115452A CN 102206003 B CN102206003 B CN 102206003B
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- ionic liquid
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- modification
- packing
- biofilters
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a preparation method of a modified pumice packing for purifying sewage, which belongs to a preparation method of a packing related to sewage treatment in the field of environment friendliness. The method comprises the following steps of: crushing and screening pumice serving as a raw material; grinding and processing to obtain irregular granules; processing to obtain granules of required sizes; performing soaking modification treatment by using ionic liquid containing low-concentration lanthanum series rare-earth elements at normal temperature for 4 to 24 hours; and draining to obtain finished products. The packing has low-cost materials, a simple processing process and a good using effect. The preparation method can be widely applied to trickling-filtering beds, anaerobic biofilters, filters, biological fluidized beds, aerated biological filters, high-load biofilters, tower type biofilters, active biofilters, wetlands and the like.
Description
Technical field
The present invention relates to filler of the relevant sewage disposal of field of Environment Protection and preparation method thereof, especially relate to a kind of modification float stone filler for sewage purification and preparation method thereof.
Background technology
China is the relatively country of shortage of water resources, along with expanding economy, and the quickening of urbanization process, Urban Water Shortage Problem of Cities is on the rise, and a large amount of dischargings of municipal effluent have more increased the weight of this trend.Sewage disposal is one of important technique measure of control water environment pollution, and the height of sewage treatment process level will directly affect the quality of water environment in an area.Biological filter and fluidization are the new bio treatment technologies that is fit to middle-size and small-size point source wastewater treatment and reuse; They are take granular filler as biofilm carrier, simultaneously, bed of packings has concurrently again and filters the function of holding back with solid-liquid separation, and carrier performance is larger on its treatment efficiency, construction costs and working cost impact, therefore, packing property research is one of key problem of biological filter and fluidization.
Studies show that to the general property that the BAF take haydite as filler is used for sewage disposal the biological filter technology is to COD, NH in the sewage quality composition early stage
4 +, turbidity, SS etc. have good treatment effect, clearance can reach respectively 88.4%, 93.7%, 91.6% and 94.2%, but to the clearance not high (on average only being 54.5%) of total nitrogen (TN).Natural pumice after further selecting to pulverize is as filler, and test shows, although pulverized float stone is a kind of relatively preferably aerating biological filter pool filler, COD, SS and turbidity improvement is not had too big difference than haydite, and very low to the clearance of TP.
Lanthanide series rare-earth elements has good promoter action to microorganism under lower concentration, particularly nitrobacteria, denitrifying bacterium, phosphate solubilizing bacteria texts are given prominence to.
Ionic liquid (Ionic liquids, ILs) claims again ionic liquid at room temperature (Room temperature ionic liquids, RTIL), refers to the organic liquid material that is comprised of ion fully under room temperature and adjacent temperature.Have without vapour pressure, can replace volatile organic solvent, the peculiar property such as can be recycled; In chemical reaction, make reaction medium or as catalyzer; In electrochemistry, make ionogen etc.The characteristics such as that ionic liquid has is non-volatile, nonflammable, conduction, catalysis, alternative traditional pollution medium also extensively changes traditional chemical technology, meets the principle of Green Chemistry, thereby is called as green solvent.Ionic liquid causes that people greatly pay close attention to since the nineties in last century, is acknowledged as the media/material of new generation of Green Chemistry chemical industry, will form once new industrial technology revolution.Tasteless, ordorless, pollution-free, nonflammable, the easy recovery of ionic liquid, can repeated multiple timesly recycle, the advantage such as easy to use, be genuine, eco-friendly green solvent.Be suitable for the requirement of the current cleaning technique of advocating and Sustainable development, more and more by the extensive recognition and acceptance of people.
Summary of the invention
For can obtain a kind of good purification, acquisition cost is low, durable, particularly to COD, NH in the sewage quality composition
4 +, TN, TP, SS etc. have the filler of good treatment effect, people have done a large amount of research and developments.The invention provides a kind of modification float stone filler for sewage purification and preparation method thereof, this filler is good purification, durable not only, particularly to COD, NH in the sewage quality composition
4 +, TN, TP, SS etc. have good treatment effect, and the starting material source is abundant, with low cost, complete processing is simple.
The present invention is as follows for the technical scheme of the modification float stone filler of sewage purification:
Be used for the preparation method of the modification float stone filler of sewage purification, carry out according to following step: take float stone as main raw material(s), be processed into irregular granular so that Φ=5-100 mm by series of process such as ore dressing, fragmentation, screening, grindings; Then soak modification with the ionic liquid etc. that contains the lower concentration lanthanide series rare-earth elements, actual conditions is soak at room temperature, and soak time is 4-24 h, drains, and obtains finished product.
Wherein said ionic liquid is imidazole type ion liquid, pyridine type ionic liquid, piperidines type ionic liquid or tetramethyleneimine type ionic liquid.
The ionic liquid that wherein said usefulness contains lanthanide series rare-earth elements soaks modification, is treated to specifically that to add lanthanide series rare-earth elements to treatment system final concentration be that 0.001-0.1 mol/L, ionic liquid final concentration are 0.001-0.01 mol/L.
The invention provides a kind of modification modification float stone filler for sewage purification and preparation method thereof, this filler is good purification, durable not only, particularly to COD, NH in the sewage quality composition
4 +, TN, TP, SS etc. have good treatment effect, and the starting material source is abundant, with low cost, complete processing is simple.
Embodiment
Embodiment 1:
Float stone is adopted in choosing, fragmentation, and screening is ground and is obtained irregular particle (Φ=5-50 mm); Then with contain lower concentration lanthanide series rare-earth elements LaCl3 imidazole type ion liquid-the 1-butyl-(the lanthanide series rare-earth elements final concentration is 0.05 mol/L to 3-Methylimidazole chloro salt ([Bmin] Cl) soak at room temperature modification, the ionic liquid final concentration is 0.01 mol/L, soak time is 6 h.), drain, obtain finished product.
Embodiment 2:
Float stone is adopted in choosing, fragmentation, and screening is ground and is obtained irregular particle (Φ=10-100 mm); Then with contain lower concentration lanthanide series rare-earth elements LaCl3 pyridine type ionic liquid-(the lanthanide series rare-earth elements final concentration is 0.1 mol/L to bromination N-ethylpyridine (N-ethylpyridinium bromide) soak at room temperature modification, the ionic liquid final concentration is 0.005 mol/L, soak time is 12 h.), drain, obtain finished product.
Embodiment 3:
Float stone is adopted in choosing, fragmentation, and screening is ground and is obtained irregular particle (Φ=5-100 mm); Then with containing the piperidines imidazole type ion liquid of lower concentration lanthanide series rare-earth elements LaCl3-bromination N-methyl, (the lanthanide series rare-earth elements final concentration is 0.001 mol/L to ethyl piperidine (N-ethyl-methyl pipe) soak at room temperature modification, the ionic liquid final concentration is 0.001 mol/L, soak time is 24 h.), drain, obtain finished product.
Test example 1:The invention process example 1 modification float stone filler and float stone filler wastewater treatment efficiency
The modification float stone filler of preparation in the embodiment 1 and the float stone filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out modification are carried out sewage disposal, detect its wastewater treatment efficiency (table 1, table 2).
Test example 2:The invention process example 2 modification float stone fillers and float stone filler wastewater treatment efficiency
The modification float stone filler of preparation in the embodiment 2 and the float stone filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out modification are carried out sewage disposal, detect its wastewater treatment efficiency (table 1, table 3).
Test example 3:The invention process example 3 modification float stone fillers and float stone filler wastewater treatment efficiency
The modification float stone filler of preparation in the embodiment 3 and the float stone filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out modification are carried out sewage disposal, detect its wastewater treatment efficiency (table 1, table 4).
Testing apparatus adopts unidimensional upward flow synthetic glass BAF, single pond diameter 150 mm, and high 2.5 m, filler load height 1.8 m.Experimental water is sanitary sewage.The experimental session water temperature is 15 ~ 30 ℃, gas-water ratio 5:1.Design maximum head 1.2 m, head loss reaches 1 m and carries out back flushing during actual motion, carries out combined water and air backwash by the program of gas-gas+water-water, and the time is followed successively by 2 ~ 3 min, 3 ~ 5 min, 9 ~ 11 min; Purge gas intensity 10 L/(m
2S), water intensity 10 L/(m
2S).The mensuration of the indexs such as COD, ammonia nitrogen, TN, TP is all undertaken by standard method, and sample frequency is taken a sample 3 times at least for each steady state.SS is more loaded down with trivial details because measuring, and when inferior quality concentration poor accuracy, so adopt turbidity to characterize.
Table 1 float stone filler is to sanitary sewage disposal usefulness
Table 2 contains the imidazole type ion liquid modification float stone filler of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Table 3 contains the pyridine type ionic liquid modification float stone filler of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Table 4 contains the ion liquid modified float stone filler of piperidines type of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Above test-results shows, the float stone filler wastewater treatment efficiency after the modification than float stone filler good sewage processing effect many.
Above-described only is preferred implementation of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the principle of the invention, can also make some modification and improvement, this also should be considered as belonging to protection scope of the present invention.
Claims (1)
1. be used for the preparation method of the modification float stone filler of sewage purification, it is characterized in that carrying out according to following step: take float stone as main raw material(s), become irregular granular so that Φ=5-100 mm by ore dressing, fragmentation, screening, attrition process; Then soak modification with the ionic liquid that contains the lower concentration lanthanum element, actual conditions is soak at room temperature, and soak time is 4-24 h, drains, and obtains finished product;
Wherein said ionic liquid is imidazole type ion liquid, pyridine type ionic liquid, piperidines type ionic liquid or tetramethyleneimine type ionic liquid;
The ionic liquid that wherein said usefulness contains the lower concentration lanthanum element soaks modification, is treated to specifically that to add lanthanum element to treatment system final concentration be that 0.001-0.1 mol/L, ionic liquid final concentration are 0.001-0.01 mol/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101154520A CN102206003B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified pumice packing for purifying sewage |
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| CN2011101154520A CN102206003B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified pumice packing for purifying sewage |
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| CN102206003A CN102206003A (en) | 2011-10-05 |
| CN102206003B true CN102206003B (en) | 2013-01-23 |
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| CN2011101154520A Expired - Fee Related CN102206003B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified pumice packing for purifying sewage |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580666B (en) * | 2012-03-14 | 2013-12-25 | 天津城市建设学院 | Modified pumice for purifying heavy metal sewage and preparation method and application of modified pumice |
| CN104370421B (en) * | 2014-11-14 | 2016-08-24 | 安徽建筑大学 | A kind of modified foam bioreactor device |
| CN109087722A (en) * | 2018-08-17 | 2018-12-25 | 西南科技大学 | A kind of uranium-bearing low level waste water ecology cleaning treatment system and processing method |
| CN110894099B (en) * | 2019-12-17 | 2022-07-19 | 海天水务集团股份公司 | Preparation method of ionic liquid modified sediment and rapid infiltration system thereof |
| CN113104985A (en) * | 2021-04-13 | 2021-07-13 | 哈尔滨工业大学 | Method for assisting in improving sewage treatment efficiency of bacterial-algae symbiotic system by using rare earth |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925408A (en) * | 2007-12-28 | 2010-12-22 | 雪佛龙美国公司 | Process for ionic liquid catalyst regeneration |
| CN102008870A (en) * | 2010-09-28 | 2011-04-13 | 南京信息工程大学 | Ionic liquid CO2 trapping agent and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7955999B2 (en) * | 2007-12-28 | 2011-06-07 | Chevron U.S.A. Inc. | System and apparatus for ionic liquid catalyst regeneration |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101925408A (en) * | 2007-12-28 | 2010-12-22 | 雪佛龙美国公司 | Process for ionic liquid catalyst regeneration |
| CN102008870A (en) * | 2010-09-28 | 2011-04-13 | 南京信息工程大学 | Ionic liquid CO2 trapping agent and preparation method thereof |
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Granted publication date: 20130123 Termination date: 20170505 |