JP2010194484A - Water supply treatment apparatus, method of operating the same and humidifier - Google Patents
Water supply treatment apparatus, method of operating the same and humidifierInfo
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Abstract
Description
本発明は、加湿装置用の給水処理装置と、その運転方法と、この給水処理装置を備えた加湿装置に関する。 The present invention relates to a water supply treatment apparatus for a humidifier, an operating method thereof, and a humidifier equipped with the water supply treatment apparatus.
家庭用電気製品の１つである加湿器は、水を貯留する着脱可能な給水タンクと、この給水タンクから供給された水を気化して空気と一緒に室内へ供給する加湿部とを備えている。この加湿部には、超音波振動子、吸水部材、加熱ヒータなどからなる気化手段が設けられ、気化したミストや加熱したスチームをファンによって空気と一緒に室内に供給する構成としている。 A humidifier, which is one of household electrical appliances, includes a detachable water supply tank that stores water, and a humidifying unit that vaporizes water supplied from the water supply tank and supplies the water together with air. Yes. The humidifying unit is provided with vaporizing means including an ultrasonic vibrator, a water absorbing member, a heater, and the like, and is configured to supply vaporized mist and heated steam together with air into the room.
特開平７−２９３９５３号公報及び特開２００７−２７８６４１号公報には、気化手段として超音波振動子を搭載した加湿器において、給水タンクから加湿部への給水路に逆浸透膜を配設したものが記載されている。この逆浸透膜は、水道水中に含まれる塩素や菌などの不純物を通過（浸透）させず、純水のみを通過させることが可能なものである。そのため、菌などの不純物が含まれた水を気化した場合における室内への菌放出が防止される。 In JP-A-7-293953 and JP-A-2007-278641, a humidifier equipped with an ultrasonic vibrator as a vaporizing means is provided with a reverse osmosis membrane in a water supply path from a water supply tank to a humidification part. Is described. This reverse osmosis membrane can pass only pure water without allowing impurities such as chlorine and bacteria contained in tap water to pass (permeate). Therefore, the release of bacteria into the room when water containing impurities such as bacteria is vaporized is prevented.
近年、抗菌技術の分野においては、有機抗菌剤と比較して安全性、耐熱性及び永続性に優れることから、銀イオンを抗菌成分の主体とした無機抗菌剤が注目されている。そして、その抗菌剤の具体的形態としては、銀イオンの抗菌性能を有効に発揮させることが出来ると同時に、使用しやすい形態であることから、多孔性セラミックに銀イオンを保持させた構造が一般的になっている。 In recent years, in the field of antibacterial technology, inorganic antibacterial agents mainly composed of silver ions as antibacterial components have attracted attention because they are superior in safety, heat resistance and permanence compared to organic antibacterial agents. As a specific form of the antibacterial agent, it is possible to effectively exhibit the antibacterial performance of silver ions, and at the same time it is easy to use, so a structure in which silver ions are held in a porous ceramic is generally used. It has become.
特開２００５−３１３１５１号公報には、水を銀担持ゼオライトと接触させた後、逆浸透膜（ＲＯ膜）を通過させる水の処理方法が記載されている。また、特開２００６−２８１０２３号公報には、水を銀添着活性炭と接触させた後、ＲＯ膜処理し、更に銀担持ゼオライトと接触させることが記載されている。 Japanese Patent Application Laid-Open No. 2005-313151 describes a water treatment method in which water is brought into contact with a silver-carrying zeolite and then passed through a reverse osmosis membrane (RO membrane). Japanese Patent Application Laid-Open No. 2006-281023 discloses that water is brought into contact with silver-impregnated activated carbon, then subjected to RO membrane treatment, and further brought into contact with silver-supported zeolite.
このように水を銀担持活性炭又はゼオライトと接触させた後、ＲＯ膜装置に通水するようにした場合には、銀担持活性炭又はゼオライトからの銀の溶出により、水中に存在する微生物を殺菌、抗菌処理し、ＲＯ膜の濾過性能劣化を抑制することができる。 In this way, when water is brought into contact with the silver-supported activated carbon or zeolite and then passed through the RO membrane device, the elution of silver from the silver-supported activated carbon or zeolite disinfects the microorganisms present in the water, Antibacterial treatment can be performed to suppress deterioration of RO membrane filtration performance.
ＲＯ膜自体は、微生物を透過させないため、原理的にはＲＯ膜の透過側配管には給水によって持ち込まれる雑菌は存在しないことになる。しかし、各種検討の結果、ＲＯ膜が汚れると、ＲＯ装置の出口配管等に菌が繁殖することがあることが認められた。 Since the RO membrane itself does not permeate microorganisms, in principle, there are no germs brought in by the water supply in the permeate-side piping of the RO membrane. However, as a result of various studies, it has been found that if the RO membrane becomes dirty, bacteria may propagate on the outlet piping of the RO device.
上記特開２００５−３１３１５１のように、水を銀担持ゼオライトと接触させた後、ＲＯ膜を通過させるようにした場合には、ＲＯ膜における菌の繁殖が防止（抑制を包含する。以下同様。）される。しかしながら、銀イオンがＲＯ膜によって排除されるため、ＲＯ膜の２次側（透過水側）における菌の繁殖の恐れがある。 As described in JP-A-2005-313151, when water is brought into contact with the silver-carrying zeolite and then passed through the RO membrane, the growth of bacteria on the RO membrane is prevented (including suppression; the same applies hereinafter). ) However, since silver ions are excluded by the RO membrane, there is a risk of bacterial growth on the secondary side (permeate side) of the RO membrane.
上記特開２００６−２８１０２３のように、水を銀添着活性炭と接触させた後、ＲＯ膜処理し、その後、銀担持ゼオライトと接触させるようにした場合、ＲＯ膜の２次側における菌の繁殖が防止されるが、銀添着活性炭からの銀の溶出は比較的短時日（例えば２ヶ月程度）のうちに低下してしまうため、ＲＯ膜に菌が繁殖する恐れがある。 As described in JP-A-2006-281023, when water is brought into contact with silver-impregnated activated carbon and then subjected to RO membrane treatment and then brought into contact with silver-carrying zeolite, bacteria are propagated on the secondary side of the RO membrane. Although it is prevented, the elution of silver from the silver-impregnated activated carbon decreases within a relatively short day (for example, about two months), and there is a possibility that bacteria may propagate on the RO membrane.
本発明は、上記従来の問題点を解決し、ＲＯ膜及びその２次側における菌の繁殖を長期にわたって防止することができる加湿装置用給水処理装置、その運転方法及び加湿装置を提供することを目的とする。 This invention solves the said conventional problem, and provides the water supply processing apparatus for humidifiers which can prevent the proliferation of bacteria on RO membrane and its secondary side over a long period of time, its operating method, and a humidifier. Objective.
請求項１の給水処理装置は、加湿装置への給水を処理するための給水処理装置において、被処理水を銀担持ゼオライトと接触させて殺菌処理するための第１の銀ゼオライト処理手段と、第１の銀ゼオライト処理手段で処理された水を逆浸透処理する逆浸透処理手段と、逆浸透処理手段で処理された水を銀担持ゼオライトと接触させて殺菌処理するための第２の銀ゼオライト処理手段とを有することを特徴とするものである。 The water supply treatment apparatus according to claim 1 is a water supply treatment apparatus for treating water supplied to a humidifying device, wherein the first silver zeolite treatment means for bringing the water to be treated into contact with the silver-carrying zeolite for sterilization treatment, Reverse osmosis treatment means for reverse osmosis treatment of water treated by the silver zeolite treatment means, and second silver zeolite treatment for sterilization treatment by bringing the water treated by the reverse osmosis treatment means into contact with the silver-supported zeolite Means.
請求項２の給水処理装置の運転方法は、請求項１に記載の給水処理装置の運転方法であって、第１及び第２の銀ゼオライト処理手段が、銀担持ゼオライトを充填した濾過手段であり、該第１の銀ゼオライト手段への通水ＳＶが５０〜１００／ｈであり、第２の銀ゼオライト手段への通水ＳＶが８０〜２００／ｈであることを特徴とするものである。 The operation method of the water supply treatment apparatus according to claim 2 is the operation method of the water supply treatment apparatus according to claim 1, wherein the first and second silver zeolite treatment means are filtration means filled with silver-supported zeolite. The water flow SV to the first silver zeolite means is 50 to 100 / h, and the water SV to the second silver zeolite means is 80 to 200 / h.
請求項３の加湿装置は、請求項１に記載の給水処理装置と、該給水処理装置からの水を空気に添加するための加湿手段とを備えたものである。 A humidifying device according to a third aspect includes the water supply treatment device according to the first aspect, and a humidifying means for adding water from the water supply treatment device to the air.
本発明では、水を銀担持ゼオライトと接触させた後、ＲＯ膜処理し、その後、銀担持ゼオライトと接触させるようにしているため、ＲＯ膜及びその２次側における銀の繁殖が防止される。 In the present invention, water is brought into contact with the silver-carrying zeolite, followed by the RO membrane treatment, and then brought into contact with the silver-carrying zeolite, so that propagation of silver on the RO membrane and its secondary side is prevented.
この銀担持ゼオライトは、長期にわたって銀を定量的に溶出させる特性を有している。そのため、ＲＯ膜１次側に銀添着活性炭を配置した従来例に比べて、ＲＯ膜における銀の繁殖防止効果が長期にわたって高いものとなる。 This silver-supported zeolite has the property of eluting silver quantitatively over a long period of time. Therefore, compared with the conventional example which has arrange | positioned silver impregnated activated carbon on the RO membrane primary side, the silver reproduction prevention effect in a RO membrane becomes high over a long period of time.
以下、本発明についてさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
本発明の給水処理装置は、加湿装置への給水を処理するためのものであり、銀担持ゼオライトを有する第１の銀ゼオライト処理手段と、この第１の銀ゼオライト処理手段からの水をＲＯ処理（逆浸透処理）するＲＯ処理手段と、このＲＯ処理手段からの水を銀担持ゼオライトと接触させる第２の銀ゼオライト処理手段とを有する。 The water supply treatment apparatus of the present invention is for treating the water supply to the humidifier, and performs RO treatment on water from the first silver zeolite treatment means having silver-carrying zeolite and the first silver zeolite treatment means. RO treatment means (reverse osmosis treatment) and second silver zeolite treatment means for bringing water from the RO treatment means into contact with the silver-supported zeolite.
この給水処理装置の処理対象となる原水としては、水道水、井水、工業用水などが例示される。原水は適宜のフィルター等の前処理手段に通水されてから給水処理装置に供給されてもよい。 Examples of raw water to be treated by this water supply treatment apparatus include tap water, well water, and industrial water. The raw water may be supplied to a water supply treatment apparatus after passing through pretreatment means such as an appropriate filter.
上記の銀ゼオライト処理手段としては、銀担持ゼオライトのペレット等の粒状体を充填した濾過塔などの濾過手段が好適である。 As the above-mentioned silver zeolite treatment means, filtration means such as a filtration tower packed with particles such as pellets of silver-carrying zeolite is suitable.
本発明に用いられる銀担持ゼオライトとしては、三次元網状構造をもつアルミノ珪酸塩の陽イオン交換能を利用してアルミノ珪酸塩の構造内に銀イオンを取り込んだもの、すなわちアルミノ珪酸塩を構成しているイオン交換性の大きい陽イオン（ナトリウムイオン、カリウムイオン等）の少なくとも一部を銀イオンに入れ替えたものが好適である。この銀担持ゼオライトの銀イオンの担持量は０．１〜１０ｗｔ％特に１〜７ｗｔ％程度が好適である。 As the silver-supported zeolite used in the present invention, silver ions are incorporated into the structure of the aluminosilicate using the cation exchange ability of the aluminosilicate having a three-dimensional network structure, that is, the aluminosilicate is constituted. It is preferable that at least a part of the cation (sodium ion, potassium ion, etc.) having high ion exchange properties is replaced with silver ions. The supported amount of silver ions in the silver-supported zeolite is preferably about 0.1 to 10 wt%, particularly about 1 to 7 wt%.
銀担持ゼオライトペレットの製造方法としては、例えば、粉末状の銀ゼオライトをポリプロピレン、ポリエチレン、ＡＢＳ等の樹脂に練り込んで粒状化したものが挙げられ、練り込んだ銀担持ゼオライトの含有率は、銀担持ゼオライトの銀イオン徐放性能によって適宜選択される。銀担持ゼオライトペレットの外表面に露出している銀担持ゼオライトは銀イオンを徐放するが、銀担持ゼオライトペレットの内部に埋没している銀担持ゼオライトは銀イオンを徐放しないので、銀イオンの徐放性能を上げるには、銀担持ゼオライトペレットの外表面積が増加するように、銀担持ゼオライトペレットの粒子径を小さくすればよい。通常の場合、銀担持ゼオライトペレットの平均粒径は０．１〜１０ｍｍ特に０．３〜３ｍｍ程度が好適である。なお、ペレットの粒径がこの程度であれば、通水圧損が小さいので、水道水の給水圧によって濾過を行うことができる。 Examples of the method for producing silver-supported zeolite pellets include powdered silver zeolite that is kneaded into a resin such as polypropylene, polyethylene, and ABS, and is granulated. It is appropriately selected depending on the silver ion sustained release performance of the supported zeolite. The silver-supported zeolite exposed on the outer surface of the silver-supported zeolite pellets releases silver ions slowly, but the silver-supported zeolite embedded inside the silver-supported zeolite pellets does not release silver ions. In order to increase the sustained release performance, the particle diameter of the silver-supported zeolite pellets may be reduced so that the outer surface area of the silver-supported zeolite pellets increases. In general, the average particle size of the silver-supported zeolite pellets is preferably about 0.1 to 10 mm, particularly about 0.3 to 3 mm. In addition, if the particle size of a pellet is this level, since a water flow pressure loss is small, it can filter by the tap water supply pressure.
銀担持ゼオライトペレットは、上記の粉末状の銀担持ゼオライトを樹脂に練り込んで粒状化したもの以外に、水に分散させたスラリー状の銀担持ゼオライトとアクリル樹脂、ポリ酢酸ビニル、ポリビニルアルコール等を主成分とするバインダーとを混合して、ポリプロピレン、ポリエチレン、ポリ塩化ビニル、ポリスチレン、ポリエステル等の粒状物や繊維や不織布の表面に付着させたものや、特許第３０８７８６３号のようにポリエチレン、ポリ塩化ビニル、ポリスチレン、ポリアミド等の熱可塑性樹脂の粒状物の表面を溶融した状態において粉末状の銀ゼオライトを付着させたものでもよく、銀ゼオライト自身が粒状物であってもよい。 In addition to the powdered silver-supported zeolite kneaded into a resin and granulated, the silver-supported zeolite pellets include slurry-supported silver-supported zeolite and acrylic resin, polyvinyl acetate, polyvinyl alcohol, etc. dispersed in water. Mixing with binder as the main component and adhering to the surface of granular materials such as polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyester, fibers and non-woven fabrics, and polyethylene, polychlorinated as in Patent No. 3087863 A powdery silver zeolite may be adhered in a molten state of the surface of a thermoplastic resin granular material such as vinyl, polystyrene, or polyamide, or the silver zeolite itself may be a granular material.
ＲＯ処理手段のＲＯ膜としては、脱塩率が９３％以上（評価条件
ＮａＣｌ濃度：５００ｍｇ／ｌ、操作圧力：０．５ＭＰａ）特に９８％以上のものが好適である。
As the RO membrane of the RO treatment means, a desalting rate of 93% or more (evaluation condition NaCl concentration: 500 mg / l, operating pressure: 0.5 MPa), particularly 98% or more is preferable.
ＲＯ膜の素材としては、酢酸セルロース、セルロース系のポリマー、ポリアミド、およびビニルポリマー等の高分子材料を用いることができる。好適なＲＯ膜としては、酢酸セルロース系またはポリアミド系の非対称膜、および、ポリアミド系の活性層を有する複合膜を挙げることができ、中でも、ポリアミド系の活性層の表層にポリビニルアルコールを被覆させた複合膜は、高排除性能かつ高透水性かつ高耐汚染性を有するので好ましい。 As a material for the RO membrane, polymer materials such as cellulose acetate, cellulose polymer, polyamide, and vinyl polymer can be used. Suitable RO membranes include cellulose acetate-based or polyamide-based asymmetric membranes and composite membranes having a polyamide-based active layer. Among them, the surface layer of the polyamide-based active layer is coated with polyvinyl alcohol. The composite membrane is preferable because it has high exclusion performance, high water permeability, and high contamination resistance.
分離膜の形状としては平膜または中空糸膜であることは好ましく、例えば分離膜の膜厚を１０μｍ〜１ｍｍの範囲、中空糸膜の場合は外径を５０μｍ〜４ｍｍの範囲とすることが好ましい。 The shape of the separation membrane is preferably a flat membrane or a hollow fiber membrane. For example, the thickness of the separation membrane is preferably in the range of 10 μm to 1 mm, and in the case of the hollow fiber membrane, the outer diameter is preferably in the range of 50 μm to 4 mm. .
ＲＯ膜装置の形状は、分離膜が平膜状の場合はスパイラル型、プリーツ型、プレート・アンド・フレーム型、円盤状のディスクを積み重ねたディスクタイプがあり、中空糸膜の場合は、中空糸膜をＵ字状やＩ字状に束ねて容器に収納した円筒型などが例示される。 The RO membrane device has a disc type in which spiral, pleated, plate-and-frame, and disc-shaped discs are stacked when the separation membrane is a flat membrane. Examples include a cylindrical shape in which a membrane is bundled in a U shape or an I shape and stored in a container.
このような給水処理装置に原水を供給して処理することにより、ＲＯ膜の１次側及び２次側並びに加湿器のいずれにおいても水中に銀イオンが存在し、菌の繁殖が防止される。しかも、１次側及び２次側の銀ゼオライト処理手段としていずれも銀担持ゼオライトを用いているので、長期にわたって確実に菌の繁殖を防止することができる。また、ＲＯ膜面のファウリングも防止され、長期にわたって給水処理装置を安定運転することができる。この給水処理装置からの処理水は、ＲＯ膜透過水であるから、加湿器のスケールトラブルが防止されると共に、空気中に放出しても析出物を生じさせない。 By supplying raw water to such a water supply treatment device and processing it, silver ions are present in the water on both the primary and secondary sides of the RO membrane and the humidifier, thereby preventing the growth of bacteria. In addition, since silver-supported zeolite is used as the primary and secondary silver zeolite treatment means, it is possible to reliably prevent the growth of bacteria over a long period of time. In addition, fouling of the RO membrane surface is prevented, and the water supply treatment apparatus can be stably operated over a long period of time. Since the treated water from this water supply treatment device is RO membrane permeated water, scale troubles of the humidifier are prevented, and deposits are not generated even when released into the air.
水中への銀イオンの溶出量は、水中における銀イオン濃度として３〜５０μｇ／Ｌ特に５〜１０μｇ／Ｌ程度が好適である。 The elution amount of silver ions in water is preferably about 3 to 50 μg / L, particularly about 5 to 10 μg / L as the silver ion concentration in water.
このためには、銀ゼオライト処理手段の銀担持量が４〜６ｗｔ％程度である場合、第１の銀ゼオライト処理手段への通水ＳＶを５０〜１００／ｈ特に６０〜９０／ｈとし、第２の銀ゼオライト処理手段への通水ＳＶを８０〜２００／ｈ特に１００〜１８０／ｈとすることが好ましい。なお、本発明者の研究の結果、水中への銀の溶出速度は、ＲＯ膜１次側の水よりもＲＯ膜透過水の方が大きいことが認められた。そのため、第２の銀ゼオライト処理手段への通水ＳＶを第１の銀ゼオライト処理手段への通水ＳＶの１．５〜４倍、特に２〜３倍程度とすることが好ましい。 For this purpose, when the silver loading of the silver zeolite treatment means is about 4 to 6 wt%, the water flow SV to the first silver zeolite treatment means is 50 to 100 / h, particularly 60 to 90 / h, It is preferable that the water flow SV to the silver zeolite processing means 2 is 80 to 200 / h, particularly 100 to 180 / h. As a result of the inventor's research, it was recognized that the rate of elution of silver into water was larger in RO membrane permeated water than in water on the RO membrane primary side. Therefore, it is preferable that the water flow SV to the second silver zeolite treatment means is 1.5 to 4 times, particularly about 2 to 3 times, the water flow SV to the first silver zeolite treatment means.
このように実質的に菌を含まないようになった処理水を加湿手段にて気化して空気中に供給することにより、室内等の空気を衛生的に加湿することができる。 Thus, by treating the treated water substantially free of bacteria and evaporating it with a humidifying means and supplying it into the air, the air in the room can be humidified hygienically.
加湿手段としては、水を気化して空気中に供給できるものであれば特に限定されず、水噴霧式、気化式、蒸気式などの各種のものを用いることができるが、水噴霧式のものが好適である。 The humidifying means is not particularly limited as long as water can be vaporized and supplied to the air, and various types such as a water spray type, a vaporization type, and a steam type can be used. Is preferred.
水噴霧式加湿手段としては、超音波振動子によって水を微小水滴として空中に放出する超音波式のものや、ノズルから微小水滴を噴出させるノズル噴霧式のものなどが例示され、いずれのものも用いることができる。噴霧式加湿手段は、水を直接噴霧するため、他の方式に比較して水中ミネラルの除去と殺菌が重要となり、これを怠ると、噴霧した微細な水滴が乾燥すると白くなったり、水中の雑菌がばらまかれるという問題が生じるが、本発明の給水処理装置を用いることにより、かかる問題が生じることはなくなる。 Examples of the water spray type humidifying means include an ultrasonic type that discharges water into the air as fine water droplets by an ultrasonic vibrator, and a nozzle spray type that ejects fine water droplets from a nozzle. Can be used. Since the spray-type humidification means sprays water directly, removal and sterilization of underwater minerals is more important than other methods. Otherwise, the sprayed fine water droplets will become white when dried, or various germs in the water. However, such a problem is not caused by using the water treatment apparatus of the present invention.
以下、実施例及び参考例について説明する。 Examples and reference examples will be described below.
［実施例１］
給水処理装置として、第１の銀ゼオライト処理手段と、ＲＯ膜装置と、第２の銀ゼオライト処理手段とを備えたものを用いた。
第１の銀ゼオライト処理手段としては、銀担持量が５ｗｔ％の平均粒径１ｍｍの銀担持ゼオライトよりなるペレット１Ｌを内径４０ｍｍのカラムに充填したものを用いた。
ＲＯ膜装置としては、栗田工業株式会社製ＫＲＯＡ−１０３２を用いた。
第２の銀ゼオライト処理手段としては、上記銀担持ゼオライトよりなるペレット０．５Ｌを内径４０ｍｍのカラムに充填したものを用いた。
原水としては、市水（静岡県榛原郡吉田町水道水）を用いた。
この原水を７０Ｌ／ｈｒ（ＳＶ＝７０）にて第１の銀ゼオライト処理手段に通水した。
ＲＯ装置からは透過水を５０Ｌ／ｈｒにて流出させ、これを第２の銀ゼオライト処理手段へＳＶ＝１００にて通水した。
３ヶ月経過後においても、この給水処理装置からの処理水取出配管内面へのタンパク付着は１μｇ／ｃｍ２以下であった。
[Example 1]
As the water supply treatment device, a device provided with a first silver zeolite treatment means, an RO membrane device, and a second silver zeolite treatment means was used.
As the first silver zeolite treatment means, a column having 1 mm of pellets made of silver-supported zeolite having an average particle diameter of 1 mm and a silver-supporting amount of 5 wt% packed in a column having an inner diameter of 40 mm was used.
As the RO membrane device, KROA-1032 manufactured by Kurita Kogyo Co., Ltd. was used.
As the second silver zeolite treatment means, 0.5 L pellets made of the above-mentioned silver-supported zeolite were packed in a column having an inner diameter of 40 mm.
As raw water, city water (Yoshida-cho tap water in Kashihara-gun, Shizuoka Prefecture) was used.
This raw water was passed through the first silver zeolite treatment means at 70 L / hr (SV = 70).
Permeated water was allowed to flow out from the RO device at 50 L / hr, and this was passed through the second silver zeolite treatment means at SV = 100.
Even after the elapse of 3 months, protein adhesion to the inner surface of the treated water extraction pipe from this water supply treatment apparatus was 1 μg / cm 2 or less.
［比較例１］
実施例１の３ヶ月連続通水試験において、第１の銀ゼオライト処理手段を省略した他は同様にして通水試験した。その結果、上記の付着タンパク量は４．６μｇ／ｃｍ２であった。
[Comparative Example 1]
In the 3-month continuous water passage test of Example 1, a water flow test was conducted in the same manner except that the first silver zeolite treatment means was omitted. As a result, the amount of the attached protein was 4.6 μg / cm 2 .
［比較例２］
実施例１の３ヶ月連続通水試験において、第１の銀ゼオライト処理手段の銀担持ゼオライトの代わりに銀添着活性炭（銀添着量１ｗｔ％、平均粒径０．６ｍｍ）を用いた他は同様にして通水試験した。その結果、上記の付着タンパク量は１４μｇ／ｃｍ２であった。
[Comparative Example 2]
In the three-month continuous water passage test of Example 1, the same procedure was performed except that silver-impregnated activated carbon (silver impregnation amount 1 wt%, average particle diameter 0.6 mm) was used instead of the silver-supported zeolite of the first silver zeolite treatment means. A water flow test was conducted. As a result, the amount of attached protein was 14 μg / cm 2 .
これら実施例１及び比較例１，２より、本発明の給水処理装置によると、ＲＯ膜２次側における菌の繁殖が防止されることが認められた。 From these Example 1 and Comparative Examples 1 and 2, it was confirmed that according to the water supply treatment apparatus of the present invention, the growth of bacteria on the secondary side of the RO membrane was prevented.
［参考例１］
実施例１の第１の銀ゼオライト処理手段と同様の銀ゼオライト処理手段を用い、通水ＳＶ及び供給水の種類を表１の通り種々変えて銀ゼオライト処理水中の銀イオン濃度を測定した。この測定結果を表１に示す。
[Reference Example 1]
Using the same silver zeolite treatment means as the first silver zeolite treatment means of Example 1, the kinds of water passing SV and feed water were variously changed as shown in Table 1, and the silver ion concentration in the silver zeolite treated water was measured. The measurement results are shown in Table 1.
表１の通り、ＳＶを変更することにより水中への銀イオンの溶出量を制御することができ、また、同一のＳＶであっても銀イオンの溶出量は供給水の種類によって異なることがわかる。 As shown in Table 1, it is understood that the elution amount of silver ions into water can be controlled by changing the SV, and the elution amount of silver ions varies depending on the type of supplied water even with the same SV. .
Claims (3)
被処理水を銀担持ゼオライトと接触させて殺菌処理するための第１の銀ゼオライト処理手段と、
第１の銀ゼオライト処理手段で処理された水を逆浸透処理する逆浸透処理手段と、
逆浸透処理手段で処理された水を銀担持ゼオライトと接触させて殺菌処理するための第２の銀ゼオライト処理手段と
を有することを特徴とする給水処理装置。 In the water supply treatment device for treating the water supply to the humidifier,
A first silver zeolite treatment means for bringing the water to be treated into contact with the silver-supported zeolite for sterilization;
Reverse osmosis treatment means for reverse osmosis treatment of the water treated by the first silver zeolite treatment means;
A water supply treatment apparatus comprising: second silver zeolite treatment means for bringing water treated by reverse osmosis treatment means into contact with silver-carrying zeolite for sterilization treatment.
第１及び第２の銀ゼオライト処理手段が、銀担持ゼオライトを充填した濾過手段であり、
該第１の銀ゼオライト手段への通水ＳＶが５０〜１００／ｈであり、
第２の銀ゼオライト手段への通水ＳＶが８０〜２００／ｈである
ことを特徴とする給水処理装置の運転方法。 The operation method of the water supply treatment apparatus according to claim 1,
The first and second silver zeolite treatment means are filtration means filled with silver-supported zeolite;
The water flow SV to the first silver zeolite means is 50-100 / h;
The method for operating a water supply treatment apparatus, wherein the water flow SV to the second silver zeolite means is 80 to 200 / h.
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