WO2011062171A1 - 褐藻類を原料とする凝集剤用原料、該原料を用いた凝集剤、該凝集剤の製造方法及び該凝集剤を用いた浄化方法 - Google Patents
褐藻類を原料とする凝集剤用原料、該原料を用いた凝集剤、該凝集剤の製造方法及び該凝集剤を用いた浄化方法 Download PDFInfo
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- WO2011062171A1 WO2011062171A1 PCT/JP2010/070425 JP2010070425W WO2011062171A1 WO 2011062171 A1 WO2011062171 A1 WO 2011062171A1 JP 2010070425 W JP2010070425 W JP 2010070425W WO 2011062171 A1 WO2011062171 A1 WO 2011062171A1
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- WIPO (PCT)
- Prior art keywords
- brown algae
- powder
- flocculant
- water
- flocculating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B7/00—Halogens; Halogen acids
- C01B7/01—Chlorine; Hydrogen chloride
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
Definitions
- the present invention relates to a raw material for a flocculant using brown algae as a raw material, a flocculant using the raw material, a method for producing the flocculant, and a purification method using the flocculant.
- alginic acid is considered as an aggregating agent that seems to have no safety problems even if it is ingested by humans.
- Alginic acid is contained in a large amount between brown algae cells, and humans have been taking brown algae as food for a long time, and it is clear that there is no problem in human health. In addition, a large portion of brown algae that is not a commercial product is discarded, and its processing is also a problem.
- the brown algae to be discarded were washed with dilute hydrochloric acid to change the contained alginic acid into a form that can be easily extracted, and sodium carbonate was added to the brown algae washed with this hydrochloric acid to obtain a brown algae paste.
- alginic acid in the tissue is eluted into the aqueous solution from the inside of the tissue due to the influence of sodium carbonate, and exhibits an aggregating function. It has been proposed to use the paste as a flocculant as it is without separating the remaining insoluble tissue.
- the water-containing brown algae paste is added to and mixed with the water to be treated, and then an aqueous solution of calcium chloride is added to the water to be treated.
- alginic acid in the water to be treated reacts with calcium ions in a state of suspending suspended substances, gels through formation of a crosslinked structure, precipitates and precipitates in the water to be treated, and the water to be treated is purified. It will be.
- the inventors of the present application have tried to produce a flocculant by the method shown in FIG. 2 using brown algae as a raw material. That is, the collected brown algae are washed with water to remove the adhering salt, soaked in dilute hydrochloric acid of about 0.12 to 0.24M, washed with water, and then crushed with a crusher (mixer, disposer, etc.). Then, add about 0.75% sodium carbonate aqueous solution to the obtained brown algae slurry, mix it, and dry this brown algae slurry into flakes with a dryer (drum dryer) using the heat of condensation of water vapor. Attempts are made to crush into flocculants.
- the paste produced contains water, it will rot during the period until use, so it must be dried and stored. Since a large amount of paste-like brown algae that are difficult to air inside and difficult to dry must be dried inside, brown algae cannot be dried with an ordinary dryer. Therefore, it is necessary to use a special dryer such as a drum dryer to dry the powder. Therefore, compared to the case of using an ordinary dryer, the drying cost is high and the production cost of the flocculant is high. there were.
- the problem to be solved by the present invention is to obtain a coagulant having a desired coagulation ability and having no variation in coagulation ability at low cost, using brown algae as a raw material.
- the present inventors have discovered that a mixed powder consisting of a simple brown algae powder and a sodium compound powder in which no sodium compound is reacted with brown algae can be used as a flocculant as it is. It came to make.
- the most important aspect of the present invention is that a dry powder of brown algae treated with an acid aqueous solution is used as a raw material for a flocculant, and a powder of a sodium compound is mixed therewith to form a flocculant, which is used for purifying treated water.
- the raw material for the flocculant according to the present invention is mainly composed of a dried powder of brown algae obtained by treating with an acid aqueous solution and washing with water.
- the flocculant according to the present invention comprises a mixed powder of a dried brown algae powder and a sodium compound powder, which is treated with an acid aqueous solution and then washed with water.
- the method for producing a flocculant according to the present invention includes a step of treating brown algae with an aqueous acid solution, a step of washing the brown algae treated with the aqueous acid solution, a step of drying the washed brown algae, and a dried step. It comprises a step of pulverizing the brown algae into a powder and a step of mixing the powder of the brown algae pulverized into a powder and a powder of a sodium compound.
- another method for producing a flocculant according to the present invention includes a step of treating brown algae with an aqueous acid solution, a step of washing the brown algae treated with the aqueous acid solution, a step of drying the washed brown algae, The method comprises a step of mixing a powder of a sodium compound with the dried brown algae and a step of pulverizing the brown algae mixed with a powder of a sodium compound into a powder form.
- examples of the brown algae include seaweeds such as seaweed, kombu, akamoku, and hibamata, but the brown algae that can be used in the present invention are not limited to these seaweeds and include alginic acid. Any known seaweed can be used.
- brown algae are not limited to those that are launched to the beach and discarded, and those that are discarded as food processing residues. It may be cultivated for use as a raw material.
- hydrochloric acid for example, hydrochloric acid can be used, but other acids (for example, sulfuric acid, phosphoric acid, citric acid, etc.) may be used as long as they can promote the activation of alginic acid.
- acids for example, sulfuric acid, phosphoric acid, citric acid, etc.
- dilute hydrochloric acid having a concentration of 0.1 to 0.3 M is preferable.
- the concentration of dilute hydrochloric acid is within this range, the SS concentration of the water to be treated is 50 ppm or less.
- dilute hydrochloric acid having a concentration of 0.12 M to 0.3 M is desirable, and when the dilute hydrochloric acid is in this range, the SS concentration of the water to be treated is 30 ppm or less and the consumption of dilute hydrochloric acid can be reduced.
- Treatment with an acid aqueous solution is not only for immersing seaweed in an acid aqueous solution, but also by spraying acid on the seaweed, so that the acid aqueous solution adheres to the surface of the seaweed and the acid aqueous solution acts between cells. If so, it may be brought into such a state by any method.
- sodium carbonate, sodium hydroxide, sodium hydrogen carbonate and the like can be used as a sodium compound from the viewpoint of ease of procurement, but other than these can be used as long as sodium ions can act on alginic acid.
- Sodium compounds may be used.
- the proportion contained in the mixed powder is preferably 5 to 10 wt%.
- the SS concentration of the water to be treated is 50 ppm or less.
- the proportion of sodium carbonate is 7.5 to 10 wt%, it is more desirable.
- the SS concentration of the water to be treated is 30 ppm or less and the consumption of sodium carbonate is relatively small. This is because it can be done. Another reason is that excessive sodium ions hinder the cross-linking reaction between alginic acid and calcium ions during the treatment of water to be treated.
- the SS concentration of the water to be treated is 30 ppm or less.
- the consumption of sodium carbonate is unnecessarily increased compared to the purification effect, so the upper limit is limited to 10 wt%. It was. Therefore, the case where the concentration of sodium carbonate exceeds 10 wt% M is not excluded.
- the purification method according to the present invention includes a step of mixing the flocculant and water to form a flocculant liquid, a step of adding and mixing the flocculant liquid to the water to be purified, and adding the flocculant liquid And the step of adding calcium chloride to the water to be purified mixed and mixing.
- the water to be purified and calcium chloride are slowly mixed so as not to break the floc formed by aggregation of turbid components in the water to be purified. It is preferable to mix.
- Another purification method includes a step of adding and mixing calcium chloride to the water to be purified, a step of mixing the flocculant and water to form a flocculant liquid, and adding and mixing calcium chloride. And a step of adding and mixing the flocculant liquid to the water to be purified.
- the flocculant liquid when adding the flocculant liquid to the water to be purified, the water to be purified and the flocculant liquid, so as not to break the floc formed by the turbid components in the water to be purified aggregate. Mixing slowly is preferred.
- the amount of calcium chloride added to the water to be purified is preferably in the range of 0.5 to 1.0 g / L with respect to 1 liter of purified water.
- the amount of calcium chloride added is in the range of 0.5 to 1.0 g / L, the desired purification effect is observed, but when the amount of calcium chloride added is less than 0.5 g / L, sufficient coagulation ability is not observed, and This is because even if the amount of calcium exceeds 1.0 g / L, no further improvement in the coagulation ability is observed.
- the present invention is a powder obtained by drying the brown algae to be used, and does not contain moisture whose content ratio is unknown as in the case of pasty brown algae, so that the amount of sodium compound to be added should be accurately determined. Therefore, there is an advantage that an aggregating agent having constant and excellent aggregating characteristics can be obtained.
- the pasty brown algae is separated and dried, and it is not considered to determine the water content of the pasty brown algae. And if you think about a site where flocculants would actually be made and used from brown algae, it can't be easily done anywhere.
- the present invention does not obtain a flocculant by mixing an aqueous solution of a sodium compound with a brown algae paste, but obtains a flocculant by mixing a powder of a sodium compound with a brown algae powder. Since both the sodium salt and the sodium compound are powders, deterioration during storage is suppressed, and a homogeneous flocculant can be obtained because it is diluted to a concentration suitable for input immediately before use.
- the flocculant according to the present invention is dried in an ordinary dryer that dries in a seaweed state without using a special dryer that dries pasty brown algae, that is, in a drying chamber whose temperature is increased. Since it can be manufactured using a dryer that can be procured anywhere just by putting the object in it, it can be used effectively as a coagulant, for example, seaweed that has been discarded and wasted on remote beaches. Can do.
- the brown algae mixed with the sodium compound powder is pulverized into a powder to produce an aggregating agent
- the sodium compound powder is further pulverized into fine particles, and the generated brown algae powder
- the present invention uses pure alginic acid from seaweed as a flocculant because it is used as a flocculant simply by treating seaweed with an acid aqueous solution without extracting pure alginic acid from seaweed. Compared with the case of using it, there is an advantage that the flocculant can be obtained at a very low cost, and therefore the water to be treated can be purified at a very low cost.
- the flocculant according to the present invention is made from seaweed that has been eaten by humans for a long time and is known to be harmless to the human body, so it is made from chemically synthesized substances.
- the flocculant according to the present invention is made from seaweed that has been eaten by humans for a long time and is known to be harmless to the human body, so it is made from chemically synthesized substances.
- raw seaweed which is a brown algae
- dilute hydrochloric acid 0 to 1.2 M for 1 hour.
- the raw seaweed becomes soaked on the surface when immersed in dilute hydrochloric acid.
- the fresh seaweed was pulled up from the dilute hydrochloric acid, washed with water to remove the dilute hydrochloric acid, placed in a dryer, and dried at 80 ° C. for 6 hours.
- the raw wakame was drastically reduced in volume by drying, and 100 g of raw wakame became 18 g of dried wakame.
- dry wakame was pulverized with a pulverizer to obtain powdered wakame, and sodium carbonate powder was added to the obtained powdered wakame and mixed well to obtain a powdery flocculant composed of powdered wakame and sodium carbonate powder.
- the ratio of the sodium carbonate powder was 7.5 wt%.
- this flocculant 0.5 g of this flocculant and 69.5 ml of water were mixed to prepare a flocculant liquid.
- sodium carbonate dissolves in water, and alginic acid in the powdered seaweed reacts with sodium carbonate and is eluted in the flocculant solution.
- an aqueous calcium chloride solution is added to the water to be treated and forcedly stirred. Thereafter, when a flocculant solution is added to the water to be treated and forcibly stirred, flocs are formed in the water to be treated. This is because alginic acid in the aqueous solution reacts with calcium chloride and gels through formation of a crosslinked structure, and then precipitates in the water to be treated.
- the concentration of dilute hydrochloric acid was adjusted to 0.12 M
- the amount of sodium carbonate powder added was set to 0 to 30 wt%
- a flocculant was prepared under the same conditions as in Example 1 except that these were tested for purification of water to be treated.
- the SS concentration of the supernatant of the water to be treated after 3 hours was as shown in Table 2.
- the SS concentration is 30 ppm or less when the SS concentration is 50 ppm and 7.5 wt%. It can be seen that the ratio is particularly preferably 7.5 to 10.0 wt%.
- the concentration of dilute hydrochloric acid was set to 0.12M, and similarly to Example 1, dry powders of kombu, akamoku and hibermata were prepared, and sodium carbonate powder was added to these at a ratio of 10.0 wt%, and mixed well.
- the coagulant was prepared under the same conditions as in Example 1 and purification treatment of the water to be treated was conducted, the SS concentration of the supernatant of the water to be treated after 3 hours is shown in Table 3. It was street.
- the SS concentration of the supernatant of the water to be treated is the same as in the case of the flocculant of powdered seaweed even when sodium carbonate powder is added to powdered kombu, powdered akamoku, and powdered hibamata. It is 30 ppm or less, and it can be seen that the flocculant made from kombu, akamoku, and hibamata has the same flocculating ability as the flocculant made from wakame.
- the concentration of dilute hydrochloric acid was set to 0.12M
- the proportion of sodium carbonate powder was set to 10.0 wt%
- a flocculant was prepared under the same conditions as in Example 1 except for these, and calcium chloride added to the water to be treated
- the amount of addition was 0.25 g / L to 2 g / L and purification treatment of the treated water was performed under the same conditions as in Example 1, the SS concentration of the supernatant of the treated water after 3 hours is shown in Table 4. As shown.
- the flocculant liquid is added after adding calcium chloride to the water to be treated
- the calcium chloride is added after adding the flocculant liquid to the water to be treated
- the SS concentration of the water to be treated was 10,000 ppm
- an experiment was performed under the condition that 50 g of the flocculant and 500 g of calcium chloride koji were added per 1 ton of the water to be treated, using a flocculant as a raw material.
- SS of to-be-processed water was measured, it was as showing in Table 5.
- the SS concentration of the water to be treated is 14 ppm when calcium chloride is added first, 28 ppm when added later, and the case where calcium chloride is added before the addition of the flocculant is purified. It turns out that the result is good. Therefore, it can be seen that when calcium chloride is added prior to the flocculant, the amount of flocculant added can be reduced to reduce the processing cost.
- This flocculant is made from brown algae, and brown algae have long been eaten by humans and are known to be harmless to the human body. It can also be used for purposes such as purification of liquid foods such as purification of alcohol and liquors.
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- Organic Chemistry (AREA)
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- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
Claims (11)
- 酸水溶液で処理した後、水洗いしてなる褐藻類の乾燥粉末を主成分とすることを特徴とする凝集剤用原料。
- 前記酸水溶液が、濃度0.1M~0.3Mの塩酸水溶液であることを特徴とする請求項1に記載の凝集剤用原料。
- 酸水溶液で処理した後、水洗いしてなる褐藻類の乾燥粉末とナトリウム化合物粉末との混合粉末からなることを特徴とする凝集剤。
- 前記酸水溶液が、濃度0.1M~0.3Mの塩酸水溶液であり、前記ナトリウム化合物が炭酸ナトリウムであり、前記混合粉末中に含まれている該炭酸ナトリウムの割合が5~10重量%であることを特徴とする請求項3に記載の凝集剤。
- 褐藻類を酸水溶液で処理する工程と、酸水溶液で処理した該褐藻類を水洗いする工程と、水洗いした褐藻類を乾燥する工程と、乾燥した該褐藻類を粉末状に粉砕する工程と、粉末状に粉砕した該褐藻類の粉末とナトリウム化合物の粉末を混合する工程とを備えたことを特徴とする凝集剤の製造方法。
- 前記酸水溶液が、濃度0.1M~0.3Mの塩酸水溶液であり、前記ナトリウム化合物が炭酸ナトリウムであり、前記混合粉末中に含まれている該炭酸ナトリウムの割合が5~10重量%であることを特徴とする請求項5に記載の凝集剤の製造方法。
- 褐藻類を酸水溶液で処理する工程と、酸水溶液で処理した該褐藻類を水洗いする工程と、水洗いした褐藻類を乾燥する工程と、乾燥した該褐藻類にナトリウム化合物の粉末を混ぜる工程と、ナトリウム化合物の粉末を混ぜた該褐藻類を粉末状に粉砕する工程とを備えたことを特徴とする凝集剤の製造方法。
- 前記酸水溶液が、濃度0.1M~0.3Mの塩酸水溶液であり、前記ナトリウム化合物が炭酸ナトリウムであり、前記混合粉末中に含まれている該炭酸ナトリウムの割合が5~10重量%であることを特徴とする請求項7に記載の凝集剤の製造方法。
- 請求項3又は4記載の凝集剤と水を混合して凝集剤液を作る工程と、被浄化水に該凝集剤液を添加して混合する工程と、該凝集剤液を添加して混合した該被浄化水に塩化カルシウムを添加して混合する工程とを備えたことを特徴とする浄化方法。
- 被浄化水に塩化カルシウムを添加して混合する工程と、請求項3又は4記載の凝集剤と水を混合して凝集剤液を作る工程と、塩化カルシウムを添加して混合した被浄化水に該凝集剤液を添加して混合する工程とを備えたことを特徴とする浄化方法。
- 前記塩化カルシウムの添加量が0.5~1g/Lであることを特徴とする請求項9又は10に記載の浄化方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2010320182A AU2010320182B2 (en) | 2009-11-18 | 2010-11-17 | Flocculating agent starting material using brown algae as starting material, flocculating agent using said starting material, preparation method for said flocculating agent, and purification method using said flocculating agent |
CN201080046610.5A CN102574030B (zh) | 2009-11-18 | 2010-11-17 | 以褐藻类为原料的凝聚剂用原料,使用该原料的凝聚剂,该凝聚剂的制造方法及使用该凝聚剂的净化方法 |
EP10831565.6A EP2502656A4 (en) | 2009-11-18 | 2010-11-17 | FLOCCULATION REAGENT RAW MATERIAL USING BROWN ALGAE AS RAW MATERIAL, FLOCCULATION REAGENT USING SAID RAW MATERIAL, PROCESS FOR PREPARING SAID FLOCKING REAGENT, AND PROCESS FOR PURIFYING SAID FLOCKING REAGENT |
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JP2009262493A JP5646159B2 (ja) | 2009-11-18 | 2009-11-18 | 褐藻類を原料とする凝集剤用原料、該原料を用いた凝集剤、該凝集剤の製造方法及び該凝集剤を用いた浄化方法 |
JP2009-262493 | 2009-11-18 |
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WO2011062171A1 true WO2011062171A1 (ja) | 2011-05-26 |
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EP (1) | EP2502656A4 (ja) |
JP (1) | JP5646159B2 (ja) |
KR (1) | KR20120099683A (ja) |
CN (1) | CN102574030B (ja) |
AU (1) | AU2010320182B2 (ja) |
WO (1) | WO2011062171A1 (ja) |
Cited By (2)
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CN110819659A (zh) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | 一种海藻有机聚合物的制备方法 |
CN117772081A (zh) * | 2024-02-23 | 2024-03-29 | 青岛明月海藻集团有限公司 | 一种包埋光合细菌的水质净化剂的制备方法及其用途 |
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JP5761735B2 (ja) * | 2010-09-28 | 2015-08-12 | 国立大学法人 琉球大学 | オキナワモズクを原料とした環境にやさしい天然物由来の凝集剤 |
FR2985916B1 (fr) * | 2012-01-25 | 2015-12-04 | Univ Bordeaux Segalen | Decontamination par hydrogels d'echantillons aqueux contenant des nanoparticules |
CN105692850B (zh) * | 2016-04-20 | 2018-04-27 | 济南大学 | 一种水处理用香蕉皮高分子混凝剂的制备方法 |
CN105692845B (zh) * | 2016-05-04 | 2018-05-08 | 济南大学 | 一种柚子皮天然混凝剂的制备方法 |
CN105883996B (zh) * | 2016-05-09 | 2018-08-31 | 济南大学 | 一种改性香蕉皮混凝剂及其制备工艺 |
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JP2003181206A (ja) * | 2001-12-20 | 2003-07-02 | Chuo Insatsu Kk | 凝集剤組成物及び汚水処理方法 |
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- 2010-11-17 KR KR1020127012750A patent/KR20120099683A/ko not_active Application Discontinuation
- 2010-11-17 EP EP10831565.6A patent/EP2502656A4/en not_active Withdrawn
- 2010-11-17 AU AU2010320182A patent/AU2010320182B2/en not_active Ceased
- 2010-11-17 WO PCT/JP2010/070425 patent/WO2011062171A1/ja active Application Filing
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Cited By (3)
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CN110819659A (zh) * | 2019-11-15 | 2020-02-21 | 斯蒂芬·Y·周 | 一种海藻有机聚合物的制备方法 |
CN117772081A (zh) * | 2024-02-23 | 2024-03-29 | 青岛明月海藻集团有限公司 | 一种包埋光合细菌的水质净化剂的制备方法及其用途 |
CN117772081B (zh) * | 2024-02-23 | 2024-06-04 | 青岛明月海藻集团有限公司 | 一种包埋光合细菌的水质净化剂的制备方法及其用途 |
Also Published As
Publication number | Publication date |
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EP2502656A1 (en) | 2012-09-26 |
AU2010320182B2 (en) | 2016-04-07 |
CN102574030A (zh) | 2012-07-11 |
EP2502656A4 (en) | 2014-01-22 |
JP2011104522A (ja) | 2011-06-02 |
AU2010320182A1 (en) | 2012-06-07 |
KR20120099683A (ko) | 2012-09-11 |
CN102574030B (zh) | 2015-03-11 |
JP5646159B2 (ja) | 2014-12-24 |
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