JPH09313055A - Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device - Google Patents

Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device

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Publication number
JPH09313055A
JPH09313055A JP9074021A JP7402197A JPH09313055A JP H09313055 A JPH09313055 A JP H09313055A JP 9074021 A JP9074021 A JP 9074021A JP 7402197 A JP7402197 A JP 7402197A JP H09313055 A JPH09313055 A JP H09313055A
Authority
JP
Japan
Prior art keywords
activated carbon
culture
titanium dioxide
circulation type
nutritive solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9074021A
Other languages
Japanese (ja)
Inventor
Mitsuo Suzuki
光雄 鈴木
Kazushi Matsuura
一志 松浦
Original Assignee
Mitsubishi Chem Corp
三菱化学株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP8-70242 priority Critical
Priority to JP7024296 priority
Application filed by Mitsubishi Chem Corp, 三菱化学株式会社 filed Critical Mitsubishi Chem Corp
Priority to JP9074021A priority patent/JPH09313055A/en
Publication of JPH09313055A publication Critical patent/JPH09313055A/en
Pending legal-status Critical Current

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Classifications

    • Y02P60/216

Abstract

PROBLEM TO BE SOLVED: To provide a sterilization device for a circulation type nutritive solution culture device, capable of removing waste matters excreted from the roots of plants, suppressing the propagation of pathogenic microbes for root rots, etc., in the culture solution, and unnecessitating the exchange of the culture solution or remarkably reducing the number of the exchange operations, excellent in environmental pollution prevention and realizing the culture free from an agrochemical by using activated carbon. SOLUTION: Activated carbon such as silver-adhered activated carbon or activated carbon to whose surfaces titanium dioxide is adhered is used. This sterilization device for a circulation type nutritive solution culture device has an activated carbon-charged tank 5 and preferably further an ultraviolet light- irradiating device and a titanium dioxide tank.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【発明の属する技術分野】本発明は、循環式養液栽培装
置及び循環式養液栽培装置、並びに養液殺菌方法に係わ
るものである。本発明の循環式養液栽培装置は、水耕栽
培や固形培地耕栽培等の循環方式養液栽培において、養
液中の根腐病などの病害の原因となる病原菌の繁殖を抑
制し、さらに、根から排出される老廃物(水溶性有機
物)の除去もできるもので、かかる養液栽培装置は、養
液の交換が不要で、無農薬化を実現した養液栽培装置と
して好適に使用されるものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating-type hydroponic cultivation apparatus, a circulating-type hydroponic cultivation apparatus, and a nutrient solution sterilizing method. The circulation type hydroponics device of the present invention, in the circulation type hydroponics such as hydroponic culture and solid medium culture, suppresses the propagation of pathogenic bacteria that cause diseases such as root rot in the nutrient solution, and Also, waste products (water-soluble organic matter) discharged from the roots can be removed, and such a nutrient solution cultivation device is suitable for use as a nutrient solution cultivation device that does not require replacement of nutrient solution. It is something.
【0002】[0002]
【従来技術】土の代わりに、植物に必要な栄養成分を含
む水溶液(以下、「培養液」という)を使い、作物を栽
培する養液栽培は、水耕栽培と固形培地耕栽培とに大別
され、水耕は、湛液型水耕と培養液薄膜水耕(NF
T)、固形培地耕はロックウール耕、礫耕、砂耕等に各
々代表される。
2. Description of the Related Art Hydroponics for cultivating crops using an aqueous solution containing nutrients required for plants (hereinafter referred to as "culture liquid") in place of soil is largely used for hydroponic cultivation and solid medium cultivation. Hydroponics is divided into submerged hydroponics and culture solution thin-film hydroponics (NF
T) and solid medium cultivation are represented by rock wool cultivation, gravel cultivation, sand cultivation and the like.
【0003】平成5(1993)年度の、我が国の養液栽培面
積は690haで、湛液型水耕が278ha(40%)
と最も多く、次いでロックウール耕256ha(37
%)、NFT 102ha(15%)であり、この3方
式で、全体の92%を占めている。湛液型水耕と培養液
薄膜水耕(NFT)は、培養液を再利用する循環式であ
り、ロックウール耕では、循環式と非循環(掛け流し)
式があるが、地下水や河川の汚染等の環境問題から循環
式に移行しつつある。
In the fiscal year 1993, the hydroponics area of Japan was 690ha, and the submerged hydroponics was 278ha (40%).
And most, followed by rock wool cultivation 256ha (37
%) And NFT 102ha (15%), and these three methods account for 92% of the total. Submerged hydroponics and culture solution thin-film hydroponics (NFT) are circulation type that reuses culture medium, and rock wool cultivation is circulation type and non-circulation (overflow).
There is a ceremony, but due to environmental problems such as pollution of groundwater and rivers, it is shifting to a circulation method.
【0004】現在、市販されている主要な湛液型水耕方
式は、M式水耕・協和式ハイポニカ・新和式等量交換水
耕・新和式NS水耕・積水スイコウメイト・カネコEK
式ハイドロポニック・JT楽農次郎等である。これら
は、いずれも、栽培ベッドが、軽量のスチロール成型品
で構成されており、培養液を貯液槽に集めて循環する形
式と、栽培ベッドが貯液槽を兼ね、ベッド内で培養液を
還流する形式のものとがある。いずれの水耕方式も、独
自の酸素富化の方式や、給排液装置・培養液制御方式等
に特徴をもたせている。湛液型水耕方式では、根域に多
量の培養液が存在するので、根温が温室内の気温に影響
されにくいという特徴がある。培養液管理は、通常、温
度、pH、EC値で行っている。
At present, the main liquid immersion type hydroponic systems that are commercially available are M type hydroponic, Kyowa type hyponica, Shinwa type equal amount exchange hydroponic, Shinwa type NS hydroponic, Sekisui Suikomate, Kaneko EK.
It is a type hydroponic, JT Rakuno Jiro, etc. In all of these, the cultivating bed is composed of a lightweight styrene molded product, and the culture liquid is collected and circulated in the liquid storage tank, and the cultivating bed also serves as the liquid storage tank, and the culture liquid is stored in the bed. There is a reflux type. Each hydroponic method has its own unique oxygen enrichment method, and a supply / drainage device and culture solution control method. The submerged hydroponic method is characterized in that the root temperature is not affected by the temperature in the greenhouse because a large amount of culture solution exists in the root area. The culture medium is usually controlled by temperature, pH and EC value.
【0005】養液栽培は、土壌伝染性病害を回避できる
栽培方法として研究・開発されたため、連作障害が回避
でき、収穫量が多い点が最大の特徴といえる。しかしそ
の反面、土壌とは異なり、病原菌に対する拮抗菌も存在
しないため、栽培ベッドや培養液循環系に病原菌が飛び
込んだときの被害は非常に大きいものとなる。土壌のよ
うな緩衝作用が少なく、病原菌の拡散が容易で、根との
接触機会が多く、培養液中に菌が混入すると土耕よりも
蔓延しやすい。
[0005] Hydroponics has been researched and developed as a cultivation method that can avoid soil-borne diseases, so its most important feature is that continuous cropping failures can be avoided and the amount of crops is large. On the other hand, however, unlike soil, there are no antagonistic bacteria against pathogenic bacteria, and the damage caused when the pathogenic bacteria jump into the cultivation bed or the culture solution circulation system is extremely large. It does not have a buffering effect like soil, it is easy to spread pathogenic bacteria, has many opportunities to contact roots, and when bacteria are mixed in the culture solution, it is more easily spread than soil cultivation.
【0006】一般に、培養液中の病原菌は胞子、菌糸や
遊走子の形で液中を伝播し、根から侵入し、根腐れ病な
どを引き起こす。特に、ピシウム菌・リゾクトニア菌・
フザリウム菌等による立ち枯れ病・萎凋病は、養液栽培
作物のほとんどが被害の対象となる。病原菌に対する対
策として、通常は、農薬が使用されており、栽培物中の
残留農薬は、土壌栽培物に比べ、養液栽培物では、その
濃縮度が高くなりやすく、人体に対する影響が少ないと
は言いきれず不安があった。また、培養液を交換するこ
とも頻繁に行われているが、地下水や河川の汚染等の環
境問題からも、コストや手間の点からも好ましい対処法
とは言えない。また、消費者からは減農薬、無農薬化の
要望が強く、農薬を使用しない殺菌法が求められてい
た。養液栽培法において農薬を用いない殺菌法として、
紫外線・オゾン・加熱などによる殺菌方法が知られてい
るが、紫外線だけでは十分な効果得られ難く、又、加熱
装置やオゾン発生装置などの装置は維持管理が大変であ
ったり、高価である等の問題があった。
[0006] Generally, pathogenic bacteria in the culture medium propagate in the liquid in the form of spores, hyphae or zoospores, invade from roots, and cause root rot. Especially, Pythium and Rhizoctonia
Almost all hydroponic crops are affected by wilt disease and wilt disease caused by Fusarium. As a countermeasure against pathogenic bacteria, pesticides are usually used, and residual pesticides in cultivated products are more likely to be concentrated in hydroponic culture than in soil cultivated products, and have little effect on the human body. I could not say it, and I was anxious. Further, the culture solution is frequently replaced, but it cannot be said to be a preferable coping method in view of environmental problems such as pollution of groundwater and rivers, cost and labor. In addition, consumers strongly demand reduction of pesticides and elimination of pesticides, and a sterilization method that does not use pesticides has been demanded. As a sterilization method that does not use pesticides in hydroponics,
Although sterilization methods using ultraviolet rays, ozone, heating, etc. are known, it is difficult to obtain sufficient effects with only ultraviolet rays, and equipment such as heating devices and ozone generators are difficult to maintain and expensive. There was a problem.
【0007】また、これらの方法では、養液栽培におけ
る循環式の場合必然的に生じる、根から排出される老廃
物(水溶性有機物)の蓄積に対してはほとんど効果がな
く、培養液を定期的に交換する必要がある。
In addition, these methods have little effect on the accumulation of waste products (water-soluble organic matter) discharged from the root, which is inevitable in the case of the circulation type in hydroponic culture, and the culture solution is regularly used. Need to be replaced.
【0008】[0008]
【発明が解決しようとする課題】上述の従来の循環式養
液栽培装置は、培養液の交換が必要で、殺菌装置が高価
だったり効果が不十分である等の問題を有するため、消
費者の無農薬化への要望に答えることは難しく、さらに
あらゆる場合にその殺菌効果が十分というわけでもな
い。このため人体に対する影響や環境問題を配慮した、
安価で、病原菌の繁殖を抑制し、さらに、根から排出さ
れる老廃物(水溶性有機物)を除去でき、培養液の交換
が不要な工業的に適用範囲の広い養液栽培装置、および
既存の養液栽培装置に容易に取り付けることが出来る循
環式養液栽培装置用殺菌装置が求められている。
SUMMARY OF THE INVENTION The above-mentioned conventional circulation-type hydroponic cultivation device has a problem that the culture solution needs to be replaced, and the sterilizing device is expensive and the effect is insufficient. It is difficult to meet the demand for pesticide-free products, and the bactericidal effect is not sufficient in all cases. Therefore, considering the effects on the human body and environmental issues,
It is inexpensive, can suppress the propagation of pathogenic bacteria, can remove waste products (water-soluble organic matter) discharged from roots, and does not require replacement of culture solution. There is a demand for a sterilizing device for a circulating-type hydroponic device that can be easily attached to the hydroponic device.
【0009】[0009]
【課題を解決するための手段】そこで本発明者は、上記
の課題を解決すべく鋭意検討した結果、水耕栽培や固形
培地耕栽培等の循環方式養液栽培において、活性炭、特
に特定の物質を付着させた活性炭を用いた殺菌装置を用
いることにより、かかる課題が解決することを見出し本
発明に到達した。すなわち本発明の目的は、根から排出
される老廃物(水溶性有機物)を除去し、さらに、培養
液中の根腐病などの病害の原因となる病原菌の繁殖を抑
制でき、その結果、培養液の交換の回数を著しく減らし
たり、場合によっては交換不要とできる養液栽培装置を
提供することである。
Therefore, as a result of intensive studies to solve the above problems, the present inventor has found that activated carbon, particularly a specific substance, in a hydroponics method such as hydroponic culture or solid medium culture. The inventors have found that such a problem can be solved by using a sterilizer using activated carbon to which is attached and have reached the present invention. That is, the object of the present invention is to remove waste products (water-soluble organic matter) discharged from the roots, and further suppress the propagation of pathogenic bacteria that cause diseases such as root rot in the culture solution, resulting in culture. It is an object of the present invention to provide a hydroponic cultivation device capable of remarkably reducing the number of times of exchanging the liquid, or in some cases not requiring the replacement.
【0010】そしてかかる本発明の目的は、活性炭を用
いた循環式養液栽培装置用殺菌装置により達成され
る。、より好ましくは活性炭が銀添着活性炭である循環
式養液栽培装置用殺菌装置、そしてさらに好適な態様と
して紫外線照射装置と二酸化チタン槽を有する活性炭を
用いた循環式養液栽培装置用殺菌装置、および活性炭が
二酸化チタン表面付着活性炭であり、紫外線照射装置を
有する循環式養液栽培装置用殺菌装置、そしてこれらの
殺菌装置を組み込んだ循環式養液栽培装置により容易に
達成される。
The object of the present invention is achieved by a sterilizer for a circulating-type hydroponic device using activated carbon. , More preferably, the activated carbon is a sterilizer for a circulation type hydroponics device which is a silver impregnated activated carbon, and a sterilizer for a circulation type hydroponic device using an activated carbon having an ultraviolet irradiation device and a titanium dioxide tank as a more preferable embodiment, Also, the activated carbon is titanium dioxide surface-attached activated carbon, and can be easily achieved by a sterilizing apparatus for a circulation type hydroponic device having an ultraviolet irradiation device and a circulation type hydroponic device incorporating these sterilization devices.
【0011】[0011]
【発明の実施の形態】以下、本発明をより詳細に説明す
る。本発明の養液栽培装置は、従来の養液栽培装置に活
性炭を用いた殺菌装置を組み込んだものであり、該活性
炭を用いた殺菌装置以外は従来のものをそのまま使用で
きる。もちろん既設の養液栽培装置に本発明を特徴づけ
る活性炭を用いた殺菌装置を付加してもよい。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The hydroponic cultivation apparatus of the present invention is a conventional hydroponic cultivation apparatus in which a sterilizing apparatus using activated carbon is incorporated, and conventional ones can be used as they are except the sterilizing apparatus using the activated carbon. Of course, a sterilizer using activated charcoal, which characterizes the present invention, may be added to an existing hydroponics device.
【0012】なお、本発明の装置で活性炭を用いる形態
としては、例えば充填槽に活性炭を充填して養液を通じ
る等、養液を活性炭により殺菌しうる形態であれば特に
限定されるものではない。本発明で用いられる活性炭と
しては、粒状または繊維状活性炭が好ましく、ヤシ殻、
木材、大鋸屑、木炭、クルミ殻等の植物系、レキ青炭、
無煙炭、褐炭、亜炭、草炭、泥炭、コークス、コールタ
ール、石炭ピッチ、石油ピッチ等の鉱物系、レイヨン、
アクリル、フェノール、石炭系ピッチ等の繊維系活性炭
が好適に使用される。活性炭の吸着能は、比表面積に大
きく依存するので、比表面積の大きいものは少量でも良
く、小さいものは多量に必要となる。活性炭充填槽の大
きさの制約から、低比表面積のものを大量に使用するの
は好ましいとは言えない。比表面積としては100m2/
g以上が望ましく、使用する水量に併せて、活性炭の使
用量を決定すれば良い。例えば、活性炭の交換を1年に
1回行う場合、100tの水量に対し、1000m2/g
程度の活性炭を使用する場合であれば、最低10kg以
上が適当である。好ましくは100tの水量に対し、1
0〜500kg、より好ましくは50〜300kgであ
る。かかる範囲の使用量において、養液中の病原菌に対
し最も効果がある。活性炭充填槽は、固定床でも流動床
でも問わず、上向流でも下向流でも良い。
The form of using activated carbon in the apparatus of the present invention is not particularly limited as long as it is a form in which the nutrient solution can be sterilized by the activated carbon, for example, a filling tank is filled with the activated carbon and the nutrient solution is passed through. Absent. The activated carbon used in the present invention is preferably granular or fibrous activated carbon, coconut shell,
Wood, sawdust, charcoal, walnut shells and other plant systems
Anthracite, lignite, lignite, grass peat, peat, coke, coal tar, mineral pitch such as coal pitch, petroleum pitch, rayon,
Fiber-based activated carbon such as acrylic, phenol, or coal-based pitch is preferably used. Since the adsorptive capacity of activated carbon largely depends on the specific surface area, a small amount of activated carbon has a large specific surface area and a large amount of activated carbon has a large specific surface area. Due to the size limitation of the activated carbon filling tank, it is not preferable to use a large amount of one having a low specific surface area. Specific surface area is 100m 2 /
The amount of activated carbon used may be determined in accordance with the amount of water used. For example, if the activated carbon is replaced once a year, 1000m 2 / g for 100t of water
If a small amount of activated carbon is used, a minimum of 10 kg or more is suitable. Preferably 1 for 100t of water
It is 0 to 500 kg, more preferably 50 to 300 kg. When the amount used is in this range, it is most effective against pathogenic bacteria in the nutrient solution. The activated carbon filling tank may be a fixed bed or a fluidized bed, and may be an upward flow or a downward flow.
【0013】本発明で用いられる活性炭において好適な
ものの一つが銀あるいは銀化合物を付着させた銀添着活
性炭である。銀添着活性炭とは、活性炭表面に銀あるい
は銀化合物が付着しているものであれば、その製法は問
わない。銀添着量については、0.001wt%〜3w
t%程度が好ましく、養液中への銀イオンの溶出濃度で
表せば、20ppb以上になるように調節すれば良い。
One of the preferred activated carbons used in the present invention is silver-impregnated activated carbon to which silver or a silver compound is attached. The silver-impregnated activated carbon may be produced by any method as long as silver or a silver compound is attached to the surface of the activated carbon. Regarding the amount of silver impregnated, 0.001 wt% to 3w
About t% is preferable, and the concentration may be adjusted to 20 ppb or more when expressed by the concentration of silver ions eluted into the nutrient solution.
【0014】通常の、特に銀等が付着していない活性炭
を使用する場合には、活性炭のみでは殺菌効果が低いの
で、光触媒二酸化チタンを充填した二酸化チタン槽を設
けてもよい。具体的な二酸化チタン槽の一例としては、
ガラス管あるいはガラス繊維にTiO2をゾルゲル法で
コートしたものが挙げられ、これに紫外線を照射するこ
とにより、光触媒である二酸化チタンが紫外光により励
起され、正孔を生じ、その表面で起こるOHラジカルの
酸化作用により、殺菌が可能となる。この場合、活性炭
充填槽は、二酸化チタン槽の前でも後でもかまわない
が、二酸化チタン槽の汚れによる紫外線照射効果の低減
防止のため、二酸化チタン槽の前に設置することがより
好ましい。
In the case of using ordinary activated carbon, particularly when activated carbon to which silver or the like is not attached is used, a titanium dioxide tank filled with titanium dioxide photocatalyst may be provided since the bactericidal effect is low with activated carbon alone. As an example of a concrete titanium dioxide tank,
Examples include glass tubes or glass fibers coated with TiO 2 by the sol-gel method. By irradiating this with ultraviolet rays, titanium dioxide, which is a photocatalyst, is excited by ultraviolet rays to generate holes, and OH that occurs on the surface thereof is generated. Sterilization is possible due to the oxidizing action of radicals. In this case, the activated carbon filling tank may be before or after the titanium dioxide tank, but it is more preferably installed before the titanium dioxide tank in order to prevent reduction of the ultraviolet irradiation effect due to the dirt of the titanium dioxide tank.
【0015】二酸化チタンの結晶形としては、アナター
ゼ型とルチル型が好ましく、バンドギャップの点で、ア
ナターゼ型の方がより好ましい。ガラス管やガラス繊維
へのコーティング膜は、1次粒子径の小さな多孔質膜が
好ましく、1次粒子径としては1μm以下、さらに好ま
しくは、100nm以下が好ましい。コーティング法に
ついては、多層コーティングによる多孔質膜とするた
め、ディップコート法が適している。
As the crystal form of titanium dioxide, the anatase type and the rutile type are preferable, and the anatase type is more preferable in view of the band gap. The coating film on the glass tube or glass fiber is preferably a porous film having a small primary particle size, and the primary particle size is preferably 1 μm or less, more preferably 100 nm or less. As for the coating method, the dip coating method is suitable because a porous film is formed by multilayer coating.
【0016】使用する光源は、380nm以下の波長を
含んでいれば良く、特に制限するものではない。紫外線
照度としては、10μw/cm2以上が好ましい。表面
に二酸化チタンが存在する活性炭を利用すれば、紫外線
照射装置が必要であるが、二酸化チタン槽が不要にな
り、前記装置はさらにコンパクトになる。さらに、活性
炭表面に吸着され、濃縮された老廃物が二酸化チタンの
光触媒効果により分解していくため、他の活性炭よりも
長期間連続使用可能となるといった利点がある。
The light source used is not particularly limited as long as it contains a wavelength of 380 nm or less. The ultraviolet illuminance is preferably 10 μw / cm 2 or more. If activated carbon having titanium dioxide on the surface is used, an ultraviolet irradiation device is required, but a titanium dioxide tank is not required, and the device becomes more compact. Further, since waste products that are adsorbed on the surface of activated carbon and concentrated are decomposed by the photocatalytic effect of titanium dioxide, there is an advantage that they can be used continuously for a longer period than other activated carbons.
【0017】二酸化チタン表面付着活性炭粒子充填槽に
紫外線を照射することにより、光触媒である二酸化チタ
ンが紫外光により励起され、正孔を生じ、その表面で起
こるOHラジカルの酸化作用により、殺菌および老廃物
(水溶性有機物)の分解除去を行うものであり、さら
に、活性炭により、より効率良く、根から排出される老
廃物(水溶性有機物)を吸着除去できる画期的養液栽培
装置である。
By irradiating a tank filled with activated carbon particles adhering to titanium dioxide surface with ultraviolet rays, titanium dioxide, which is a photocatalyst, is excited by ultraviolet light to generate holes, and oxidization action of OH radicals generated on the surface thereof causes sterilization and waste. This is an epoch-making hydroponic cultivation device that decomposes and removes substances (water-soluble organic substances), and can further efficiently adsorb and remove waste substances (water-soluble organic substances) discharged from roots by activated carbon.
【0018】本発明で用いられる二酸化チタン表面付着
活性炭としては、本発明者らが先に出願した、二酸化チ
タンが表面に存在し、明度L値が50以下であることを
特徴とする活性炭(特願平7−037758)あるい
は、石炭を粉砕し、造粒し、解砕し、炭化し、賦活して
石炭系活性炭を製造する方法において、造粒前の石炭
に、二酸化チタンを添加することを特徴とする石炭系活
性炭(特願平7−187954)あるいは、原料炭を微
粉砕し、粘結材と混練し、造粒し、硬化炭化し、賦活し
て造粒活性炭を製造する方法において、造粒前の原料炭
に、二酸化チタンを添加することを特徴とする造粒活性
炭(特願平7−221965)等の活性炭が好適に使用
できる。活性炭表面上の二酸化チタンの量については、
活性炭と二酸化チタンの各粒子の大きさ、二酸化チタン
の分布(表面のみか造粒時に均一混合してしまうか)等
によって重量%で表すとかなり異なってしまうため、二
酸化チタンが表面を覆いつくして、活性炭自身の吸着作
用を阻害せず、かつ表面に、効果を得るのに十分な二酸
化チタンが存在している状態を表面の明度で示すもので
ある。かかる明度の測定方法としては、分光式色差計で
0度照明−45度受光の光学条件で丸ガラスセルに充填
して行う。
The titanium dioxide surface-attached activated carbon used in the present invention is an activated carbon characterized in that titanium dioxide is present on the surface and has a lightness L value of 50 or less, which was previously filed by the present inventors. Alternatively, in a method of pulverizing, granulating, crushing, carbonizing, and activating coal to produce a coal-based activated carbon, titanium dioxide is added to the coal before granulation. In the method of producing granulated activated carbon, which is characterized by coal-based activated carbon (Japanese Patent Application No. 7-187954) or raw material carbon, finely pulverized, kneaded with a binder, granulated, hardened and carbonized, and activated. Activated carbon such as granulated activated carbon (Japanese Patent Application No. 7-221965) characterized by adding titanium dioxide to the raw coal before granulation can be preferably used. For the amount of titanium dioxide on the activated carbon surface,
Depending on the size of each particle of activated carbon and titanium dioxide, the distribution of titanium dioxide (whether only the surface or uniformly mixed at the time of granulation), etc., it will be quite different if expressed in wt%, so titanium dioxide covers the surface. The lightness of the surface indicates a state in which the adsorption action of the activated carbon itself is not hindered and sufficient titanium dioxide for obtaining the effect is present on the surface. As a method of measuring such brightness, a round glass cell is filled with a spectroscopic color difference meter under the optical condition of 0 ° illumination and −45 ° light reception.
【0019】二酸化チタン表面付着活性炭粒子充填槽の
形状は、効率良く紫外線を照射する点から円筒または、
平板上が好ましく、前者の場合は、2重管とし内管に光
源を、後者では、外部に光源を設置することが好まし
い。使用する光源の波長と照度については、前述の二酸
化チタン槽を用いる場合と同様である。
The shape of the titanium dioxide surface-adhered activated carbon particle filling tank is a cylinder or a cylinder in order to efficiently irradiate ultraviolet rays.
A flat plate is preferable, and in the former case, a double tube is used and a light source is installed in the inner tube, and in the latter case, a light source is preferably installed outside. The wavelength and illuminance of the light source used are the same as in the case of using the titanium dioxide tank described above.
【0020】本発明の養液殺菌方法の一例を図1及び図
2に示す。図1は、一般的な循環式養液栽培装置に殺菌
機能を有する固定床タイプの活性炭充填槽を設置した模
式図である。図1中、1は栽培ベット、2は給液ポン
プ、3は培養液タンク、4は追肥装置、5は殺菌機能を
有する活性炭充填槽、6は給液管、7は廃液管である。
An example of the nutrient solution sterilizing method of the present invention is shown in FIGS. FIG. 1 is a schematic diagram in which a fixed bed type activated carbon filling tank having a sterilizing function is installed in a general circulation type hydroponic cultivation apparatus. In FIG. 1, 1 is a cultivation bed, 2 is a liquid supply pump, 3 is a culture liquid tank, 4 is a fertilizer device, 5 is an activated carbon filling tank having a sterilizing function, 6 is a liquid supply pipe, and 7 is a waste liquid pipe.
【0021】活性炭充填槽の設置方法としては、培養液
タンクからポンプで汲み上げて殺菌機能を有する活性炭
充填槽を通して培養液タンクに戻すといったように培養
液タンクに隣接して設置するか、6の給液管の途中に設
置するかのどちらかが好ましい。図2に、活性炭充填槽
が流動床タイプで培養液タンクに隣接した場合の模式図
を示す。図2中、8はポンプ、9は活性炭充填槽(流動
床)、10は二酸化チタンコートガラス管、11は紫外
線ランプである。
The activated carbon filling tank may be installed adjacent to the culture solution tank by pumping it from the culture solution tank and returning it to the culture solution tank through the activated carbon filling tank having a sterilizing function. Either is preferably installed in the middle of the liquid pipe. FIG. 2 shows a schematic diagram when the activated carbon filling tank is a fluidized bed type and is adjacent to the culture solution tank. In FIG. 2, 8 is a pump, 9 is an activated carbon filling tank (fluidized bed), 10 is a titanium dioxide coated glass tube, and 11 is an ultraviolet lamp.
【0022】図2においては、活性炭充填層は流動床タ
イプとしたが、固定床とすることもでき、特に限定され
るものではない。活性炭として、二酸化チタン表面付着
活性炭を用いる場合は、紫外線ランプを10、11のよ
うに設置すればよい。図2においては、紫外線ランプは
外部設置型としたが、ガラス管を2重とし、中心部に紫
外線ランプを設置してもかまわない。ガラスの材質は、
紫外線透過率の高い石英管がより好ましいが、パイレッ
クス等の通常のガラス管でも良い。
In FIG. 2, the activated carbon packed bed is a fluidized bed type, but it may be a fixed bed and is not particularly limited. When titanium dioxide surface-adhered activated carbon is used as the activated carbon, an ultraviolet lamp may be installed as shown in FIGS. In FIG. 2, the ultraviolet lamp is externally installed, but the glass tube may be doubled and the ultraviolet lamp may be installed in the central portion. The glass material is
A quartz tube having a high ultraviolet transmittance is more preferable, but a normal glass tube such as Pyrex may be used.
【実施例】以下、本発明を実施例により更に詳細に説明
する。 実施例1 養液栽培で問題となる病原菌について、殺菌試験を行っ
た。三菱化学製銀添着活性炭(銀含有量1.9%、粒径
0.35〜0.71mm、比表面積1000m 2/g)を
120℃で20分高圧蒸気滅菌処理した。この滅菌処理
した銀添着活性炭0.05gと軟腐病菌(Erwinia carot
ovora ssp.carotvora)濃度が106〜107CFU/mlの5
mlの水溶液を内径36mmのガラス容器に入れ、25
℃に保った。菌数の算出は、0.1mlサンプリング
後、100倍に希釈し、希釈平板法により寒天培地で行
った。初濃度は1×107CFU/mlであり、2時間後の菌
数は1×103CFU/ml以下であった。液中の銀濃度をI
CP発光分光分析法で測定したところ、0.54ppm
であった。このように、銀添着活性炭により養液栽培に
おいて問題となる病原菌の殺菌に大きな効果を上げるこ
とができることがわかる。 実施例2 軟腐病菌の代わりにトマト萎調病菌(Fusarium oxyspor
um f. lycopersiciの小型分生胞子)を用いた以外は、
実施例1と同様にして実験を行った。初濃度は8×10
6CFU/mlであり、2時間後の菌数は7×105CFU/mlであ
った。このように、銀添着活性炭により養液栽培におい
て問題となる病原菌の殺菌に大きな効果を上げることが
できることがわかる。 比較例1 銀添着活性炭の代わりに三菱化学製活性炭ダイアホープ
006S(粒径0.35〜0.71mm、1000m2/
g)を用いた以外は実施例1と同様にして実験を行っ
た。2時間後の菌数は、3×105CFU/mlであった。 比較例2 銀添着活性炭の代わりに三菱化学製活性炭ダイアホープ
006S(粒径0.35〜0.71mm、1000m2/
g)を用いた以外は実施例2と同様にして実験を行っ
た。2時間後の菌数は、7×106CFU/mlであった。
EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples.
I do. Example 1 A bactericidal test was conducted on pathogenic bacteria that cause problems in hydroponics
Was. Mitsubishi Chemical silver impregnated activated carbon (silver content 1.9%, particle size
0.35-0.71 mm, specific surface area 1000 m Two/ g)
It was subjected to high-pressure steam sterilization treatment at 120 ° C. for 20 minutes. This sterilization process
Silver impregnated activated carbon (0.05 g) and soft rot fungus (Erwinia carot
ovora ssp.carotvora) concentration is 106-1075 of CFU / ml
25 ml of the aqueous solution is placed in a glass container with an inner diameter of 36 mm and
C. The number of bacteria is calculated by sampling 0.1 ml
Then, dilute it 100 times and perform it on an agar medium by the dilution plate method.
Was. Initial concentration is 1 x 107CFU / ml, bacteria after 2 hours
Number is 1 × 10ThreeIt was below CFU / ml. The silver concentration in the liquid is I
When measured by CP emission spectroscopy, 0.54ppm
Met. In this way, for hydroponics with silver-impregnated activated carbon
In order to have a great effect on sterilization of pathogenic bacteria which is a problem in
You can see that you can do it. Example 2 Instead of soft rot fungus, Fusarium oxyspor
um f. lycopersici small conidia)
An experiment was conducted in the same manner as in Example 1. Initial concentration is 8 × 10
6CFU / ml, the number of bacteria after 2 hours is 7 × 10FiveIn CFU / ml
Was. In this way, the silver-impregnated activated carbon makes it possible to smell
Can be greatly effective in sterilizing pathogenic bacteria that cause problems
I know that I can do it. Comparative Example 1 Instead of silver-impregnated activated carbon, activated carbon DIAHOPE manufactured by Mitsubishi Chemical
006S (particle size 0.35-0.71mm, 1000mTwo/
An experiment was conducted in the same manner as in Example 1 except that g) was used.
Was. The number of bacteria after 2 hours is 3 x 10FiveCFU / ml. Comparative Example 2 Instead of silver impregnated activated carbon, activated carbon diahope manufactured by Mitsubishi Chemical
006S (particle size 0.35-0.71mm, 1000mTwo/
An experiment was conducted in the same manner as in Example 2 except that g) was used.
Was. The number of bacteria after 2 hours is 7 × 106CFU / ml.
【0023】[0023]
【発明の効果】本発明の循環式養液栽培装置用殺菌装置
及びこれを用いた養液栽培装置は、根から排出される老
廃物(水溶性有機物)を除去し、さらに、培養液中の根
腐病などの病害の原因となる病原菌の繁殖を抑制でき、
その結果、培養液の交換が不要あるいは交換回数を激減
させることができ、消費者の無農薬化要望に答えられ、
多大な工業的利益を提供するものである。
EFFECTS OF THE INVENTION The sterilizing apparatus for circulating type hydroponic cultivation apparatus and the hydroponic cultivation apparatus using the same remove the waste products (water-soluble organic matter) discharged from the roots, and further Can suppress the propagation of pathogens that cause diseases such as root rot,
As a result, it is not necessary to replace the culture solution or the number of replacements can be drastically reduced, and the consumer's pesticide-free request can be answered.
It provides enormous industrial benefits.
【図面の簡単な説明】[Brief description of drawings]
【図1】本発明で用いることのできる一般的な循環式養
液栽培装置に殺菌機能を有する固定床タイプの活性炭充
填槽を設置した模式図
FIG. 1 is a schematic diagram in which a fixed-bed type activated carbon filling tank having a sterilizing function is installed in a general circulation-type hydroponic cultivation apparatus that can be used in the present invention.
【図2】本発明の循環式養液装置であって活性炭充填槽
が流動床タイプで培養液タンクに隣接したものの模式図
FIG. 2 is a schematic diagram of a circulating-type nutrient solution device of the present invention in which an activated carbon filling tank is a fluidized bed type and is adjacent to a culture solution tank.
【符号の説明】[Explanation of symbols]
1…栽培ベット、2…給液ポンプ、3…培養液タンク、
4…追肥装置 5…殺菌機能を有する活性炭充填槽、6…給液管、7…
廃液管、8…ポンプ、9…活性炭充填槽(流動床)10
…二酸化チタンコートガラス管 11…紫外線ランプ
1 ... cultivation bed, 2 ... liquid supply pump, 3 ... culture liquid tank,
4 ... Topdressing device 5 ... Activated carbon filling tank having sterilization function, 6 ... Liquid supply pipe, 7 ...
Waste liquid pipe, 8 ... Pump, 9 ... Activated carbon filling tank (fluidized bed) 10
… Titanium dioxide coated glass tube 11… UV lamp

Claims (6)

    【特許請求の範囲】[Claims]
  1. 【請求項1】活性炭を用いた循環式養液栽培装置用殺菌
    装置。
    1. A sterilizer for a circulating-type hydroponic cultivation apparatus using activated carbon.
  2. 【請求項2】活性炭が銀添着活性炭である請求項1記載
    の循環式養液栽培装置用殺菌装置。
    2. The sterilizer for a circulation type hydroponic device according to claim 1, wherein the activated carbon is silver-impregnated activated carbon.
  3. 【請求項3】紫外線照射装置及び二酸化チタン槽を有す
    る請求項1又は2に記載の循環式養液栽培装置用殺菌装
    置。
    3. A sterilizer for a circulating-type nutrient solution cultivator according to claim 1, which has an ultraviolet irradiation device and a titanium dioxide tank.
  4. 【請求項4】活性炭が二酸化チタン表面付着活性炭であ
    り、紫外線照射装置を有する請求項1乃至3の何れかに
    記載の循環式養液栽培装置用殺菌装置。
    4. The sterilizer for a circulating nutrient solution cultivator according to claim 1, wherein the activated carbon is titanium dioxide surface-adhered activated carbon and has an ultraviolet irradiation device.
  5. 【請求項5】請求項1乃至4記載の殺菌装置を有する循
    環式養液栽培装置。
    5. A circulating-type hydroponic cultivation apparatus having the sterilizing apparatus according to any one of claims 1 to 4.
  6. 【請求項6】請求項1乃至4の何れかに記載の殺菌装置
    を用いる養液殺菌方法。
    6. A nutrient solution sterilizing method using the sterilizing apparatus according to claim 1.
JP9074021A 1996-03-26 1997-03-26 Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device Pending JPH09313055A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP8-70242 1996-03-26
JP7024296 1996-03-26
JP9074021A JPH09313055A (en) 1996-03-26 1997-03-26 Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9074021A JPH09313055A (en) 1996-03-26 1997-03-26 Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device

Publications (1)

Publication Number Publication Date
JPH09313055A true JPH09313055A (en) 1997-12-09

Family

ID=26411410

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9074021A Pending JPH09313055A (en) 1996-03-26 1997-03-26 Sterilizing device for circulation type nutritive solution culture device and sterilization of nutritive solution with the same, and circulation type nutritive solution culture device

Country Status (1)

Country Link
JP (1) JPH09313055A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005314292A (en) * 2004-04-28 2005-11-10 Toagosei Co Ltd Microbicide and fertilizer for hydroponics, and apparatus for hydroponics using the same
JP2007130002A (en) * 2005-11-08 2007-05-31 Nikkan Kagaku Kk Small apparatus for automatically cultivating high-quality plant, and plant cultivating system reacting to human being, water, light, sound, electric signal, and concentration gradient
JP2008206448A (en) * 2007-02-27 2008-09-11 Sharp Corp Disinfectable hydroponic apparatus and hydroponic method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005314292A (en) * 2004-04-28 2005-11-10 Toagosei Co Ltd Microbicide and fertilizer for hydroponics, and apparatus for hydroponics using the same
JP2007130002A (en) * 2005-11-08 2007-05-31 Nikkan Kagaku Kk Small apparatus for automatically cultivating high-quality plant, and plant cultivating system reacting to human being, water, light, sound, electric signal, and concentration gradient
JP2008206448A (en) * 2007-02-27 2008-09-11 Sharp Corp Disinfectable hydroponic apparatus and hydroponic method

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