WO2011062202A1 - バラスト水の還元処理方法 - Google Patents
バラスト水の還元処理方法 Download PDFInfo
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- WO2011062202A1 WO2011062202A1 PCT/JP2010/070509 JP2010070509W WO2011062202A1 WO 2011062202 A1 WO2011062202 A1 WO 2011062202A1 JP 2010070509 W JP2010070509 W JP 2010070509W WO 2011062202 A1 WO2011062202 A1 WO 2011062202A1
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- ballast water
- sodium sulfite
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- pellets
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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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B13/00—Conduits for emptying or ballasting; Self-bailing equipment; Scuppers
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
- C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/686—Devices for dosing liquid additives
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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
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/685—Devices for dosing the additives
- C02F1/688—Devices in which the water progressively dissolves a solid compound
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F2303/00—Specific treatment goals
- C02F2303/18—Removal of treatment agents after treatment
- C02F2303/185—The treatment agent being halogen or a halogenated compound
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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
- C02F2305/00—Use of specific compounds during water treatment
Definitions
- the present invention relates to a safer and simpler method for reducing ballast water.
- Ballast water refers to seawater that is mounted as a weight to secure draft and stabilize the ship when the ship is empty.
- the cargo When the ship is carrying cargo, the cargo itself becomes a heavy weight and the hull is stable, but when the ship is empty, the hull floats and the stability is lowered. Therefore, a considerable amount of seawater is installed in the ballast tank after the cargo is unloaded.
- Aquatic organisms are taken together when they are taken into the ship as ship ballast water. The taken creatures are transported to a distant area as the ship navigates. And by the discharge of ballast water, organisms are spit out to a place that is not the original habitat. The exotic organisms spit out in this way may settle and breed in places where they do not have their original habitat, causing destruction of the ecosystem in the sea area, damage to economic activities such as fishing, and coastal pollution. (Refer nonpatent literature 1).
- an object of the present invention is to provide a safer and simpler method for reducing ballast water.
- the present inventor has pressed white powdered sodium sulfite together with sodium chloride as an excipient into tablets or pellets, and the tablets or pellets are killed. It has been found that reduction treatment of ballast water can be performed more safely and easily by bringing it into contact with biologically treated ballast water. The present invention has been completed by further studies based on this finding.
- the present invention provides a method for reducing ballast water that has been biocidal with a chlorine-based oxidant or an oxygen-based oxidant, using sodium sulfite tablets or pellets.
- the method for reducing ballast water according to the present invention preferably includes bringing the biocidal ballast water into contact with tablets or pellets of sodium sulfite.
- the method for reducing ballast water of the present invention preferably comprises dissolving or suspending sodium sulfite tablets or pellets in water and adding the aqueous solution or suspension to the biocidal ballast water.
- a tablet or pellet of sodium sulfite is filled in a container, and the biocidal ballast water is circulated through the lumen of the container to contact the tablet or pellet of sodium sulfite. It is preferable to contain.
- the ballast water biocidal with the chlorine-based oxidizing agent is obtained by electrolysis of ballast water.
- the present invention also provides a tablet or pellet containing sodium sulfite and an excipient.
- the excipient preferably contains sodium chloride. In the tablet or pellet of the present invention, it is preferable that the excipient consists essentially of sodium chloride. In the tablet or pellet of the present invention, the weight ratio of sodium sulfite and excipient is preferably 40/60 to 60/40.
- the tablet or pellet of the present invention is a tablet or pellet obtained by pressure molding a mixture of sodium sulfite and an excipient, and the tableting pressure at the time of pressure molding is preferably 5 to 50 MPa. .
- the tablet or pellet of the present invention is a tablet or pellet obtained by pressure molding a mixture of sodium sulfite and an excipient, and the tableting pressure at the time of pressure molding is preferably 10 to 30 MPa. .
- sodium sulfite is inhaled or attached to the skin in the operation of adding a reducing agent to ballast water after biocidal treatment with a chlorine-based substance, an oxygen-based oxidizing agent, etc.
- the health effects that are of little concern for the eyes and are of concern are diminished.
- a reduction process can be simply performed by filling a container with sodium sulfite tablets or pellets and circulating the ballast water after biocidal treatment with a chlorine-based substance, an oxygen-based oxidizing agent, or the like.
- Sodium sulfite is a hard-to-tablet powder and is difficult to mold by itself. It is particularly difficult to make large tablets.
- the tablet or pellet according to the present invention is obtained by press molding white powder sodium sulfite which is difficult to tablet together with sodium chloride. According to the present invention, a large tablet or pellet containing sodium sulfite can be obtained. Moreover, even if a large amount of ballast water to which tablets or pellets according to the present invention are added is released into the sea area, the impact on the environment is low and it is safe.
- FIG. 1 is a diagram illustrating an example of a situation where seawater is poured into a ballast tank when a ship is unloaded.
- FIG. 2 is a diagram illustrating an example of a situation in which seawater is drained from a ballast tank when a ship is loaded.
- FIG. 3 is a diagram illustrating another example of a situation in which seawater is drained from the ballast tank when the ship is loaded.
- FIG. 4 is a graph showing the relationship between tableting pressure and breaking strength in Example 3.
- the method according to the present invention is a method in which ballast water that has been biocidal treated with a chlorine-based oxidizing agent, an oxygen-based acid additive, or the like is reduced using sodium sulfite tablets or pellets.
- Chlorine oxidants used for biocidal treatment include chemicals such as chloric acid such as hypochlorous acid, chlorous acid and perchloric acid and their water-soluble salts; chlorine gas is introduced into sodium hydroxide solution, etc. And hypochlorous acid obtained by electrolyzing seawater.
- the oxygen-based acid additive include ozone, hydrogen peroxide, percarbonate and persulfate that dissolve in water to generate hydrogen peroxide.
- the ballast water biocidal with a chlorinated oxidant is meant to include those obtained by such electrolysis.
- hydrogen by-produced by electrolysis of seawater can be absorbed and stored in a hydrogen storage alloy or the like, and this hydrogen can be used for power generation or the like.
- electricity used for electrolysis can be generated by solar power generation or the like. Thus, energy efficiency becomes very high by using a system that combines power generation, ballast water treatment by electrolysis, and hydrogen storage.
- Sodium sulfite tablets or pellets can be obtained by mixing sodium sulfite and excipients and pressing the mixture.
- the excipient lactose, starch, dextrin, sucrose, celluloses and the like can be used.
- sodium chloride that does not cause marine contamination is preferable.
- the excipient one kind may be used alone, or two or more kinds may be mixed and used. When using 2 or more types mixed, it is preferable that an excipient
- “excipient substantially consists of sodium chloride” means that the excipient does not contain components other than sodium chloride to the extent that the effects of the present invention are affected. To do.
- the weight ratio of sodium sulfite and the excipient is not particularly limited, but is usually 20/80 to 95/5, preferably 30/70 to 80/20, more preferably in terms of mass ratio of sodium sulfite / excipient. 40/60 to 60/40. If the amount of the excipient is too small, it tends to be difficult to form into tablets or pellets. Conversely, if the amount of excipient is too large, the reducing effect on the amount of tablets or pellets in contact with the ballast water tends to decrease.
- a known tableting device can be used for pressure molding.
- the tableting pressure is not particularly limited, but is usually 5 to 50 MPa, preferably 10 to 30 MPa as a gauge pressure. If the tableting pressure is within this range, the tablet or pellet will not collapse during storage, and an appropriate amount will dissolve when it comes into contact with ballast water.
- Sodium sulfite tablets or pellets are not particularly limited by their shape.
- a disk shape, a rectangular parallelepiped shape, a columnar shape, etc. are mentioned.
- the size is not particularly limited.
- the diameter can be 50 to 70 mm and the height can be 25 to 35 mm.
- the reduction treatment is performed, for example, by bringing a biocidal ballast water into contact with sodium sulfite tablets or pellets, or by dissolving or suspending sodium sulfite tablets or pellets in water, This can be done by adding the suspension to the biocidal ballast water.
- the amount of sodium sulfite used in the reduction treatment is not particularly limited, but can be appropriately selected according to the amount of chlorine-based oxidizing agent remaining in the ballast water.
- the amount of sodium sulfite added is preferably 1.7 to 3 times, more preferably 2 times the residual effective chlorine concentration.
- the tablet or pellet When the biocidal ballast water is brought into contact with the sodium sulfite tablet or pellet, the tablet or pellet may be added to the ballast water and brought into contact therewith.
- a method of bringing the container into contact with the ballast water is preferable.
- the method for passing the ballast water through the container is not particularly limited.
- the ballast water may be allowed to flow in from one opening and the ballast water may be discharged from the other opening; Water may be introduced and discharged after filling with ballast water.
- the former method is efficient and preferable.
- the structure of the container is not particularly limited. For example, packed towers and tanks used in the chemical industry, etc .; Japanese National Publication No. Hei 4-500171, Japanese National Publication No. Hei 6-501418, Japanese National Publication No. Sho 59-13890, Japanese National Examples include a drug dissolver described in Kaihei 8-155465.
- FIG. 1 is a diagram illustrating a situation where seawater is poured into a ballast tank when a ship is unloaded.
- seawater from the ocean is taken in by the ballast pump 3 through the filter 2 and stored in the ballast tank 1 as a weight to stabilize the ship.
- the oxidizing agent containing sodium hypochlorite is pipe-mixed by the oxidizing agent pump 4.
- the oxidizing agent containing sodium hypochlorite can be manufactured by electrolysis of seawater.
- the ballast water can be directly electrolyzed to produce sodium hypochlorite in the ballast water.
- FIG. 2 and 3 are views showing a state in which seawater is drained from the ballast tank when the ship is loaded.
- ballast water is drained from the ballast tank 1 using a ballast pump 3.
- the reducing agent pump 8 is used to store the liquid obtained by dissolving or suspending the sodium sulfite pellets or tablets into the ballast water, and the mixture is discharged to the ocean.
- the ballast water flows into the bottom of the tower 7 filled with sodium sulfite pellets or tablets 5, the ballast water is brought into contact with the pellets or tablets 5 and discharged from the top of the tower to the ocean. ing.
- exotic organisms in the ballast water are killed at the time of loading, and the native organisms in the discharge area of the ballast water are prevented from being killed by reducing the oxidizing agent in the ballast water at the time of loading. Can do.
- Example 1 60 parts by weight of white powder of anhydrous sodium sulfite and 40 parts by weight of sodium chloride were placed in a container-fixing type mixer, stirred with a stirring blade, and sufficiently mixed. The mixture was tableted with a pelletizer at a tableting pressure of 25 MPa to obtain cylindrical pellets having a diameter of 50 mm and a length of 30 mm. The breaking strength was 960N.
- Comparative Example 1 An attempt was made to compress 100 parts by weight of a white powder of anhydrous sodium sulfite with a pelletizer in the same manner as in Example 1. However, the powder was not sufficiently solidified, and only a brittle mass with a breaking strength of 150 N or less was obtained. could not.
- Example 2 Mixture A containing 100 parts by weight of white powder of anhydrous sodium sulfite, Mixture B containing 90 parts by weight of white powder of sodium sulfite and 10 parts by weight of sodium chloride, 80 parts by weight of white powder of sodium sulfite and 20 parts by weight of sodium chloride A mixture C containing 70 parts by weight of a white powder of sodium sulfite and 30 parts by weight of sodium chloride, a mixture E containing 60 parts by weight of a white powder of sodium sulfite and 40 parts by weight of sodium chloride, a white powder 50 of sodium sulfite Mixtures F each containing parts by weight and 50 parts by weight of sodium chloride were prepared.
- the mixtures A to F were tableted with a pelletizer at a tableting pressure of 25 MPa to obtain a cylindrical solid having a straight diameter of 50 mm and a length of 30 mm.
- the results of observing the tableting state of the obtained solid are shown in Table 1.
- Example 3 50 parts by weight of white powder of anhydrous sodium sulfite and 50 parts by weight of sodium chloride were placed in a container-fixed mixer, stirred with a stirring blade, and sufficiently mixed.
- the mixture was tableted with a pelletizer (Massina) at a tableting pressure of 4 MPa, 5 MPa, 25 MPa, and 30 MPa to obtain cylindrical pellets a to d having a diameter of 50 mm and a length of 30 mm.
- the tableting pressure here refers to the gauge pressure of the hydraulic pressure of the tableting machine.
- Table 2 shows the results of measuring the breaking strength (N) of the obtained pellets a to d with SJ-50 (manufactured by Maruhishi Kagaku Kikai Seisakusho).
- the breaking strength (N) is shown as the maximum force when the tablet is sandwiched between flat plates and compressed and broken. Moreover, the relationship between tableting pressure and breaking strength is shown in FIG. When the breaking strength (N) is about 300 N or less, the tablet is easily broken by hand and is not suitable for practical use.
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Abstract
Description
船舶のバラスト水として船内に取り込む際に水棲生物が一緒に取り込まれる。取り込まれた生物は、船舶の航行に伴って遠く離れた地域まで運ばれる。そして、バラスト水の排出によって、本来の生息地ではない場所に生物が吐き出される。このようにして吐き出された外来生物が、本来の生息地でない場所に、定着、繁殖して、当該海域の生態系破壊、漁業などの経済活動への被害、海岸汚損などをひき起こすおそれがある(非特許文献1参照)。
ところが、殺生剤が添加されたバラスト水を大量に排水すると、排水された海域の在来生物を殺滅する恐れがある。そこで、殺生剤が添加されたバラスト水を排水する前または排水する時に、該バラスト水に、亜硫酸ナトリウム、水素などの還元剤や、アミン、アミノ酸、アミノアルコールなどの中和剤を添加して無害化することが提案されている。
そこで、本発明の目的は、より安全で且つ簡便なバラスト水の還元処理方法を提供することにある。
本発明は、この知見に基づきさらに検討したことによって完成したものである。
本発明のバラスト水の還元処理方法は、亜硫酸ナトリウムのタブレットまたはペレットを水に溶解または懸濁させ、該水溶液または懸濁液を殺生物処理されたバラスト水に添加することを含むことが好ましい。
本発明のバラスト水の還元処理方法は、亜硫酸ナトリウムのタブレットまたはペレットを容器に充填し、殺生物処理されたバラスト水を前記容器の内腔に流通させて亜硫酸ナトリウムのタブレットまたはペレットに接触させることを含むことが好ましい。
本発明のバラスト水の還元処理方法において、塩素系酸化剤によって殺生物処理されたバラスト水が、バラスト水の電気分解によって得られたものであることが好ましい。
本発明のタブレットまたはペレットにおいて、前記賦形剤が実質的に塩化ナトリウムからなることが好ましい。
本発明のタブレットまたはペレットにおいて、亜硫酸ナトリウムと賦形剤の重量割合が、40/60~60/40であることが好ましい。
本発明のタブレットまたはペレットは、亜硫酸ナトリウムと賦形剤の混合物を加圧成形することによって得られるタブレットまたはペレットであって、加圧成形時の打錠圧が、5~50MPaであることが好ましい。
本発明のタブレットまたはペレットは、亜硫酸ナトリウムと賦形剤の混合物を加圧成形することによって得られるタブレットまたはペレットであって、加圧成形時の打錠圧が、10~30MPaであることが好ましい。
亜硫酸ナトリウムは打錠しにくい粉末であり、単独では打錠成型が困難である。特に大型錠剤にすることが難しい。本発明に係るタブレットまたはペレットは、打錠しにくい白色粉末の亜硫酸ナトリウムを塩化ナトリウムなどとともに加圧成形することによって得たものである。本発明によれば亜硫酸ナトリウムを含む大型のタブレットまたはペレットにすることができる。また、本発明に係るタブレットまたはペレットが添加されたバラスト水を、海域に大量放出しても、環境への影響が低く、安全である。
酸素系酸加剤としては、オゾン、過酸化水素、水に溶解して過酸化水素を生じる過炭酸塩及び過硫酸塩などが挙げられる。
なお、海水の電気分解で副生する水素を水素吸蔵合金などに吸収させて貯蔵しておき、この水素を発電等に利用することができる。さらに電気分解に使用する電気は太陽光発電などで発電することができる。このように、発電と、電気分解によるバラスト水処理と、水素貯蔵とを組み合わせたシステムにすることでエネルギーの効率が非常に高くなる。
賦形剤としては、乳糖、デンプン、デキストリン、白糖、セルロース類などを用いることができるが、本発明では、海洋汚染のおそれがない塩化ナトリウムが好ましい。賦形剤は、1種を単独で用いてもよいし、2種以上を混合して用いてもよい。2種以上を混合して用いる場合、賦形剤が塩化ナトリウムを含むことが好ましく、賦形剤が実質的に塩化ナトリウムからなることがより好ましい。なお、本明細書において“賦形剤が実質的に塩化ナトリウムからなる”とは、賦形剤が、塩化ナトリウム以外の成分を、本発明の効果に影響を与える程度には含まないことを意味する。
容器にバラスト水を通す方法は、特に制限されない。例えば、少なくとも2つの開口を有する容器において、一方の開口からバラスト水を流入させ、もう一方の開口からバラスト水を排出するようにしてもよいし;一つの開口を有する容器において、該開口からバラスト水を流入させ、バラスト水を満たした後、排出するようにしてもよい。本発明では前者の方法が効率的で好ましい。
容器の構造は特に制限されない。例えば、化学工業等において使用される充填塔や充填槽;日本国特表平4-500171号公報、日本国特表平6-501418号公報、日本国特公昭59-13890号公報、日本国特開平8-155465号公報などに記載される薬剤溶解器などが挙げられる。
揚荷時には、船舶を安定にするために重石として、海洋から海水をフィルター2を通してバラストポンプ3で取り入れ、バラストタンク1へと貯める。このとき、取り入れた海水中に潜んでいる生物を殺滅するために、次亜塩素酸ナトリウムを含む酸化剤を酸化剤ポンプ4で配管混合する。なお、次亜塩素酸ナトリウムを含む酸化剤は海水の電気分解で製造することができる。また、次亜塩素酸ナトリウムを含む酸化剤をポンプ4で混合配管する代わりにバラスト水を直接に電気分解してバラスト水中で次亜塩素酸ナトリウムを生成させることもできる。
積荷時には、荷物が重石となるので、バラスト水は不要となる。バラストタンク1からバラスト水をバラストポンプ3を用いて排水している。
このとき、図2では、亜硫酸ナトリウムのペレットまたはタブレットが溶解または懸濁してなる液を貯留する薬剤タンク6から還元剤ポンプ8を使って、バラスト水に配管混合し、それを海洋に排出している。
図3では、亜硫酸ナトリウムのペレットまたはタブレット5の充填された塔7の底部にバラスト水を流入させ、バラスト水をペレットまたはタブレット5に接触させ、そして、塔の頂部から排出して海洋に排出している。
このようにして、揚荷時にバラスト水中の外来生物を殺滅し、積荷時にバラスト水中の酸化剤を還元処理することで、バラスト水の排出地の在来生物が殺滅されることを防ぐことができる。
無水亜硫酸ナトリウムの白色粉末60重量部と、塩化ナトリウム40重量部とを、容器固定型の混合機に入れ、攪拌翼で撹拌し、十分に混ぜ合わせた。該混合物を、ペレタイザーで、打錠圧25MPaで打錠して、直径50mm、長さ30mmの円柱形状のペレットを得た。破壊強度は960Nであった。
無水亜硫酸ナトリウムの白色粉末100重量部を、実施例1と同じ手法にて、ペレタイザーで打錠しようとしたが、粉末が十分に固まらず、破壊強度150N以下の脆弱な固まりしか得ることができなかった。
無水亜硫酸ナトリウムの白色粉末100重量を含有する混合物A、亜硫酸ナトリウムの白色粉末90重量部と塩化ナトリウム10重量部を含有する混合物B、亜硫酸ナトリウムの白色粉末80重量部と塩化ナトリウム20重量部を含有する混合物C、亜硫酸ナトリウムの白色粉末70重量部と塩化ナトリウム30重量部を含有する混合物D、亜硫酸ナトリウムの白色粉末60重量部と塩化ナトリウム40重量部を含有する混合物E、亜硫酸ナトリウムの白色粉末50重量部と塩化ナトリウム50重量部を含有する混合物Fをそれぞれ調製した。混合物A~Fをペレタイザーで打錠圧25MPaで打錠して、直経50mm、長さ30mmの円柱状の固体を得た。得られた固体の打錠状況を観察した結果を表1に示す。
無水亜硫酸ナトリウムの白色粉末50重量部と、塩化ナトリウム50重量部とを、容器固定型の混合機に入れ、攪拌翼で撹拌し、十分に混ぜ合わせた。該混合物を、ペレタイザー(マシーナ社製)で、打錠圧4MPa、5MPa、25MPa、30MPaで打錠して、直径50mm、長さ30mmの円柱形状のペレットa~dを得た。ここでいう打錠圧とは、前記打錠機の油圧のゲージ圧のことである。得られたペレットa~dの破壊強度(N)を、SJ-50(丸菱科学機械製作所製)にて測定した結果を表2に示す。なお、破壊強度(N)は、錠剤を平板で挟み、圧縮して破壊される際の最大の力として示す。また、打錠圧と破壊強度の関係を図4に示す。
なお、破壊強度(N)が300N程度以下になると、錠剤は手で簡単に割れるようになり、実用に適さない。
本発明は、2009年11月19日出願の日本特許出願2009-264208に基づくものであり、その内容はここに参照として取り込まれる。
Claims (11)
- 塩素系酸化剤や酸素系酸化剤によって殺生物処理されたバラスト水を、亜硫酸ナトリウムのタブレットまたはペレットを用いて、還元処理する方法。
- 亜硫酸ナトリウムのタブレットまたはペレットに、殺生物処理されたバラスト水を接触させることを含む、請求項1に記載のバラスト水の還元処理方法。
- 亜硫酸ナトリウムのタブレットまたはペレットを水に溶解または懸濁させ、該水溶液または懸濁液を殺生物処理されたバラスト水に添加することを含む、請求項1に記載のバラスト水の還元処理方法。
- 亜硫酸ナトリウムのタブレットまたはペレットを容器に充填し、殺生物処理されたバラスト水を前記容器の内腔に流通させて亜硫酸ナトリウムのタブレットまたはペレットに接触させることを含む、請求項1に記載のバラスト水の還元処理方法。
- 塩素系酸化剤によって殺生物処理されたバラスト水が、バラスト水の電気分解によって得られたものである、請求項1に記載のバラスト水の還元処理方法。
- 亜硫酸ナトリウムと賦形剤とを含有するタブレットまたはペレット。
- 前記賦形剤が塩化ナトリウムを含む、請求項6に記載のタブレットまたはペレット。
- 前記賦形剤が実質的に塩化ナトリウムからなる請求項6または7に記載のタブレットまたはペレット。
- 亜硫酸ナトリウムと賦形剤の重量割合が、40/60~60/40である請求項6~8のいずれか一項に記載のタブレットまたはペレット。
- 亜硫酸ナトリウムと賦形剤の混合物を加圧成形することによって得られるタブレットまたはペレットであって、加圧成形時の打錠圧が、5~50MPaである請求項6~9のいずれか一項に記載のタブレットまたはペレット。
- 亜硫酸ナトリウムと賦形剤の混合物を加圧成形することによって得られるタブレットまたはペレットであって、加圧成形時の打錠圧が、10~30MPaである請求項6~10のいずれか一項に記載のタブレットまたはペレット。
Priority Applications (9)
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CA2781089A CA2781089C (en) | 2009-11-19 | 2010-11-17 | Reduction treatment method for ballast water |
JP2011541938A JP5564710B2 (ja) | 2009-11-19 | 2010-11-17 | バラスト水の還元処理方法 |
US13/509,711 US9505640B2 (en) | 2009-11-19 | 2010-11-17 | Composition for treatment of ballast water |
US13/509,711 US20130020265A1 (en) | 2009-11-19 | 2010-11-17 | Reduction treatment method for ballast water |
AU2010320125A AU2010320125B2 (en) | 2009-11-19 | 2010-11-17 | Reduction treatment method for ballast water |
EP10831596.1A EP2500322A4 (en) | 2009-11-19 | 2010-11-17 | REDUCTION PROCESSING METHOD FOR BALLAST WATER |
CN201080051698XA CN102666403A (zh) | 2009-11-19 | 2010-11-17 | 压载水的还原处理方法 |
KR1020127012454A KR101422373B1 (ko) | 2009-11-19 | 2010-11-17 | 밸러스트수의 환원 처리 방법 |
US15/334,105 US20170036932A1 (en) | 2009-11-19 | 2016-10-25 | Composition for treatment of ballast water |
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US13/509,711 A-371-Of-International US20130020265A1 (en) | 2009-11-19 | 2010-11-17 | Reduction treatment method for ballast water |
US15/334,105 Division US20170036932A1 (en) | 2009-11-19 | 2016-10-25 | Composition for treatment of ballast water |
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US10512270B2 (en) | 2016-04-01 | 2019-12-24 | Eagle Us 2 Llc | Acid tablet composition and methods of preparing and using the same |
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CA2993538C (en) * | 2015-07-24 | 2023-05-09 | Eagle Us 2 Llc | Dechlorination compositions, compressed solids formed therefrom, and methods of preparing the same |
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KR102387514B1 (ko) * | 2016-09-23 | 2022-04-15 | 에보쿠아 워터 테크놀로지스 엘엘씨 | 밸러스트 수 처리 및 중화 |
WO2018102623A1 (en) * | 2016-11-30 | 2018-06-07 | Evoqua Water Technologies Limited | Ballast water management system |
CN114845960B (zh) * | 2019-12-27 | 2024-03-22 | 株式会社可乐丽 | 压载水处理剂、以及使用该压载水处理剂的压载水处理***和压载水处理方法 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US10512270B2 (en) | 2016-04-01 | 2019-12-24 | Eagle Us 2 Llc | Acid tablet composition and methods of preparing and using the same |
US11058118B2 (en) | 2016-04-01 | 2021-07-13 | Eagle Us 2 Llc | Acid tablet composition and methods of preparing and using the same |
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US20130020265A1 (en) | 2013-01-24 |
AU2010320125A1 (en) | 2012-06-07 |
CN102666403A (zh) | 2012-09-12 |
EP2500322A1 (en) | 2012-09-19 |
JP5564710B2 (ja) | 2014-08-06 |
US20170036932A1 (en) | 2017-02-09 |
KR101422373B1 (ko) | 2014-07-22 |
EP2500322A4 (en) | 2015-03-04 |
AU2010320125B2 (en) | 2013-08-15 |
KR20120082456A (ko) | 2012-07-23 |
CA2781089A1 (en) | 2011-05-26 |
JPWO2011062202A1 (ja) | 2013-04-04 |
US9505640B2 (en) | 2016-11-29 |
CA2781089C (en) | 2015-01-27 |
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