CN102211809B - Preparation method of modified limestone filler used for sewage purification - Google Patents
Preparation method of modified limestone filler used for sewage purification Download PDFInfo
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- CN102211809B CN102211809B CN2011101154499A CN201110115449A CN102211809B CN 102211809 B CN102211809 B CN 102211809B CN 2011101154499 A CN2011101154499 A CN 2011101154499A CN 201110115449 A CN201110115449 A CN 201110115449A CN 102211809 B CN102211809 B CN 102211809B
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- ionic liquid
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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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Abstract
The invention discloses a preparation method of a modified limestone filler used for sewage purification, which belongs to a preparation method of a sewage treatment filler in the field of environmental protection. The preparation method comprises the following steps of: crushing a raw material of limestone; screening the raw material; grinding and processing the raw material into irregular particles; processing the irregular particles into particles with a required size; modifying the particles by using ionic liquid containing low-concentration lanthanide rare-earth elements; soaking the modified particles at normal temperature for 4 to 24 hours; and drying the particles to obtain a finished product. The modified limestone filler is low in raw material cost, simple in processing technique and good in using effect. The modified limestone filler can be widely applied to a trickling filter bed, an anaerobic biological filter, a filtering tank, a biological fluidized bed, an aeration biological filter, a high load capacity biological filter, a tower type biological filter, an activity biological filter, a wetland and the like.
Description
Technical field
The present invention relates to filler of the relevant WWT in environmental protection field and preparation method thereof, especially relate to a kind of modified lime rock filler that is used for sewage purification and preparation method thereof.
Background technology
China is the relatively country of shortage of water resources, along with expanding economy, and quickening of urbanization process, the urban water shortage problem is on the rise, and a large amount of dischargings of municipal effluent have more increased the weight of this trend.WWT is one of important technique measure of control water environment pollution, and the height of sewage treatment process level will directly influence a geographic quality of water environment.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 biofilm carrier with the granular filler; Simultaneously, bed of packings has concurrently again and filters the function of holding back with solid-liquid separation, and carrier performance is bigger to its treatment efficiency, construction costs and working cost influence; Therefore, packing property research is one of key problem of biological filter and fluidization.
Early stage is to being that the general property research that the BAF of filler is used for WWT shows that the biological filter technology is to COD, NH in the sewage quality composition with the haydite
4 +, turbidity, SS etc. have good treatment effect, clearance can reach 88.4%, 93.7%, 91.6% and 94.2% respectively, but to the clearance not high (on average being merely 54.5%) of total nitrogen (TN).Natural stone limestone after further selecting to pulverize is as filler; Test shows; Though pulverized ls is a kind of aerating biological filter pool filler relatively preferably, COD, SS and turbidity improvement there are not too big difference than haydite, and also very low to the clearance of TP.
Lanthanide series rare-earth elements has good promoter action to mikrobe under lower concentration, particularly outstanding to effects such as nitrobacteria, denitrifying bacterium, phosphate solubilizing bacterias.
(Ionic liquids ILs), claims that again (Room temperature ionic liquids RTIL), is meant the organic liquid material of under room temperature and adjacent temperature, being made up of ion fully to ionic liquid at room temperature to ionic liquid.Peculiar property such as have no vapour pressure, instead volatile organic solvent, can be recycled; In chemical reaction, make reaction medium or as catalyzer; In electrochemistry, make ionogen etc.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, with forming once new industrial technology revolution.Advantages such as ionic liquid is tasteless, ordorless, pollution-free, nonflammable, but easy recovery repeated multiple times recycles, easy to use are genuine, eco-friendly green solvent.Be suitable for the requirement of 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 modified lime rock filler that is used 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 technical scheme of modified lime rock filler that the present invention is used for sewage purification is following:
Be used for the preparation method of the modified lime rock filler of sewage purification, carry out: take ls as main raw material(s), be processed into irregular granular (Φ=5-100 mm) through series of process such as ore dressing, fragmentation, screening, grindings according to following step; Soak modification with the ionic liquid etc. that contains the lower concentration lanthanide series rare-earth elements then and handle, actual conditions is a 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 to be handled, and 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 modified lime rock filler that is used 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:
Choosing quarrying limestone, fragmentation, screening is ground and is obtained irregular particle (Φ=5-50 mm); (the lanthanide series rare-earth elements final concentration is 0.05 mol/L with handling with the imidazole type ion liquid-1-butyl that contains lower concentration lanthanide series rare-earth elements LaCl3-3-Methylimidazole chloro salt ([Bmin] Cl) soak at room temperature modification then; The ionic liquid final concentration is 0.01 mol/L; Soak time is 6 h.); Drain, obtain finished product.
Embodiment 2:
Choosing quarrying limestone, fragmentation, screening is ground and is obtained irregular particle (Φ=10-100 mm); (the lanthanide series rare-earth elements final concentration is 0.1 mol/L with handling with pyridine type ionic liquid-bromination N-ethylpyridine (N-ethylpyridinium bromide) the soak at room temperature modification that contains lower concentration lanthanide series rare-earth elements LaCl3 then; The ionic liquid final concentration is 0.005 mol/L; Soak time is 12 h.); Drain, obtain finished product.
Embodiment 3:
Choosing quarrying limestone, fragmentation, screening is ground and is obtained irregular particle (Φ=5-100 mm); Then with using the piperidines imidazole type ion liquid-bromination N-methyl that contains lower concentration lanthanide series rare-earth elements LaCl3; (the lanthanide series rare-earth elements final concentration is 0.001 mol/L in ethyl piperidine (N-ethyl-methyl pipe) soak at room temperature modification processing; The ionic liquid final concentration is 0.001 mol/L; Soak time is 24 h.), drain, obtain finished product.
Test Example 1:Embodiment 1 modified lime rock filler of the present invention and ls filler wastewater treatment efficiency
The modified lime rock filler of preparation in the embodiment 1 and the ls filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out the modification processing are carried out WWT, detect its wastewater treatment efficiency (table 1, table 2).
Test Example 2:Embodiment 2 modified lime rock fillers of the present invention and ls filler wastewater treatment efficiency
The modified lime rock filler of preparation in the embodiment 2 and the ls filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out the modification processing are carried out WWT, detect its wastewater treatment efficiency (table 1, table 3).
Test Example 3:Embodiment 3 modified lime rock fillers of the present invention and ls filler wastewater treatment efficiency
The modified lime rock filler of preparation in the embodiment 3 and the ls filler of not using the ionic liquid that contains the lower concentration lanthanide series rare-earth elements to carry out the modification processing are carried out WWT, 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 a sewage.The experimental session water temperature is 15 ~ 30 ℃, GWR 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 indexs such as COD, ammonia nitrogen, TN, TP is all undertaken by standard method, and SF is taken a sample 3 times for each steady state at least.SS is more loaded down with trivial details because of measuring, and when inferior quality concentration poor accuracy, so adopt the turbidity sign.
Table 1 ls filler is to sanitary sewage disposal usefulness
Table 2 contains the imidazole type ion liquid modified lime rock filler of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Table 3 contains the pyridine type ionic liquid modified lime rock filler of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Table 4 contains the ion liquid modified ls filler of piperidines type of lower concentration lanthanide series rare-earth elements to sanitary sewage disposal usefulness
Above test-results shows, the ls filler wastewater treatment efficiency after the modification than ls 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 regarded as belonging to protection scope of the present invention.
Claims (1)
1. be used for the preparation method of the modified lime rock filler of sewage purification, it is characterized in that carrying out: take ls as main raw material(s), become the irregular granular Φ of making=5-100 mm through ore dressing, fragmentation, screening, attrition process according to following step; Soak modification with the ionic liquid that contains the lower concentration lanthanum element then and handle, actual conditions is a 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 wherein said ionic liquid that contains lanthanum element with lower concentration soaks modification to be handled, and 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101154499A CN102211809B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified limestone filler used for sewage purification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101154499A CN102211809B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified limestone filler used for sewage purification |
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| Publication Number | Publication Date |
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| CN102211809A CN102211809A (en) | 2011-10-12 |
| CN102211809B true CN102211809B (en) | 2012-11-07 |
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| CN2011101154499A Expired - Fee Related CN102211809B (en) | 2011-05-05 | 2011-05-05 | Preparation method of modified limestone filler used for sewage purification |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2819799B1 (en) * | 2001-01-22 | 2003-11-07 | Ahlstrom Res And Competence Ct | PROCESS FOR TREATING CHARGED LIQUID EFFLUENTS AND PLANT FOR IMPLEMENTING THE PROCESS |
| CN1566218A (en) * | 2003-06-19 | 2005-01-19 | 北京立高高新技术研究所 | Functional filler and its preparing process |
| CN100546925C (en) * | 2005-09-22 | 2009-10-07 | 刘德沛 | Utilize the method that fluidized-bed process disposes of sewage and the preparation method of organism compatibility filling and filler thereof |
| CN100467548C (en) * | 2006-12-14 | 2009-03-11 | 浙江工业大学 | Use and dosage of ioonic liquid as tower filler surface treating agent |
| JP2010125361A (en) * | 2008-11-26 | 2010-06-10 | Akinobu Fujita | Wastewater treatment system and purification system |
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