JP3590719B2

JP3590719B2 - Red soil aqueous extract containing chitosan

Info

Publication number: JP3590719B2
Application number: JP07668798A
Authority: JP
Inventors: ビョンセンビュン; クワンギルパク; 一平谷; 善行中野
Original assignee: JCR Pharmaceuticals Co Ltd
Current assignee: JCR Pharmaceuticals Co Ltd
Priority date: 1998-03-10
Filing date: 1998-03-10
Publication date: 2004-11-17
Anticipated expiration: 2018-03-10
Also published as: JPH11253541A; KR100533496B1; KR19990077406A

Description

【０００１】
【発明の属する技術分野】
本発明は、脱臭、洗浄及び食品改質のための水性液剤及び方法に関する。より詳しくは、本発明は、赤土の水性抽出液及び、酸性側ｐＨにおいて溶解したキトサンを含有する、脱臭剤、食品改質剤及び洗浄剤として有用な水性液剤及びそれによる脱臭方法に関する。
【０００２】
【従来の技術】
カニやエビの殻に含まれるキチン及びキトサンの抗菌作用はよく知られている。キチンは、甲殻類・昆虫類の外殻のクチクラに含有される成分であり、その生物界における生産量は年間１０００億トンと推定されている。またキトサンは、キチンを原料とし、加熱したアルカリ溶液でこれを脱アセチル化することにより、工業的に生産されている。
【０００３】
天然高分子であるキトサンの化学構造はセルロースのそれに極めて類似しており、その分子内に存在するアミノ基により強力な分子間結合力を示す。キトサンの用途は多様であり、その脱コレステロール作用、血圧降下作用、免疫強化作用等の生理作用のため、健康食品として用いられている。キトサンは水に不溶であるが、希酸には可溶であり、アミノ基を持つために重金属吸着剤、核酸やエンドトキシン等の酸性物質除去剤として用いられる。また、微生物による分解性が良いため、カチオン系活性汚泥凝集剤としても利用されている。
【０００４】
一方、悪臭の脱臭方法としては、従来、吸着型脱臭剤として活性炭を用いた脱臭剤が汎用されているが、この種の脱臭剤は、夏の高温多湿の条件下で脱臭能が低下することが報告されている。これに対し、特開平３−１８２２５９号には、キトサンと、金属の無機酸塩及び有機酸塩の錯体粉末よりなる、水に不溶性の化学脱臭剤が開示されている。また、特開平６−６５０１９号には、木酢液と変性型キトサンの混成物からなる脱臭剤が開示されている。
【０００５】
しかしながら、例えば各家庭から排出される大量の生ゴミや養鶏場、養豚場等のような大型の悪臭源からの悪臭を効果的に脱臭できる手段はこれまで知られていない。多くの場合、生ゴミは焼却処理されるが、これには大きなコストを要している。一方、生ゴミはリサイクルにより有機肥料の原料ともなり得るものであるが、収集された膨大な量の生ゴミは腐敗により強い悪臭を発し、これはそのような有機肥料化の実行を妨げている一要因である。また大規模な悪臭源ではないものの、愛玩動物のトイレ場の砂や砂利からの悪臭も生活上しばしば問題となるが、これらの悪臭の発生を効果的に遮断する方法も知られていない。
【０００６】
【発明が解決しようとする課題】
本発明は、このような状況に照らし、広範囲に使用できる、強力な脱臭効果を有する脱臭剤及び脱臭方法を提供することを主たる目的とする。
【０００７】
【課題を解決するための手段】
赤土（正規には「赤粘土（ｒｅｄｃｌａｙ）」と呼ばれる。）は、赤黄褐色ないし暗褐色を示す極細粒の遠洋性堆積物であり、有機体炭素含有量が低く、鉄（ＩＩＩ）及びマンガン（ＩＶ）水和酸化物含有量の高い酸化的堆積物である。赤土と脱臭との関係については、これまで報告されたものを知らないが、本発明者らは、キトサンとクエン酸とを、赤土の水抽出液中に溶解させたところ、キトサンの脱臭作用が著しく増強されて強力な脱臭剤として使用できること、そして更には、そのような組成物が意外にも食品の改質作用、及び優れた洗浄作用をも有することを見出した。
【０００８】
即ち本発明は、赤土の水性抽出液と、酸性側ｐＨにおいて溶解したキトサンとを含む水性液剤を提供する。該水性液剤は、従来知られていたキトサンの脱臭効果を著しく高める強力な脱臭剤として広範な状況での使用を可能にする。
【０００９】
従ってまた本発明は、そのような水性液剤を悪臭源に対して散布することによる、悪臭の脱臭方法をも提供する。
【００１０】
更には、赤土の水性抽出液は、悪臭源上でキトサンの溶液と混合されてもよい。従って本発明は更に、悪臭源に対して、赤土の水性抽出液と、酸性側ｐＨにおいて溶解したキトサンを含む水性液剤との双方を散布することによる、悪臭の脱臭方法をも提供する。
【００１１】
また本発明の水性液剤は、食品の脱臭、発酵の遅延その他により食品を改質するための食品添加剤として、更には食器、調理器具等の油汚れの洗浄剤としても使用することができる。従って本発明は、脱臭のみならず食品添加剤及び洗浄剤としての水性液剤をも提供する。
【００１２】
【発明の実施の形態】
本発明の水性液剤は、赤土を適当量の水と混合して静置し、得られた上澄みに酸性側ｐＨにおいてキトサンを撹拌し溶解させることにより得ることができる。キトサンはそのままでは水に不溶であるが、酸性側ｐＨとすることにより溶解する。製造の手順としては、無論、酸性側ｐＨにおいてキトサンを予め溶解させた水溶液と赤土の上澄液とを後から混合することによって製造してもよく、特に限定されない。得られる液剤のｐＨは通常は１〜５、より好ましくは２〜３である。酸性側ｐＨとするには、酸を適宜含有させればよい。ここに用いる酸は、本発明の水性液剤の用途にとって有害なものでない限り特に限定されない。従って、一般の有機酸や無機酸、例えば、クエン酸、酢酸、塩酸、リン酸、マレイン酸及びコハク酸等を使用してよい。酸例えばクエン酸は、キトサンを溶解させるのに必要な量加えられればよいが、酸を余分に加えても支障はない。
【００１３】
使用する各原料間の重量比率には、明確な限界はない。一般には用いる赤土の量とキトサンの量とが、重量比で約２：１程度とするのが目安であるが、特にこれに限定されず、１：１〜４：１又はより広く１：２〜８：１程度の範囲、更には１：４〜１０：１の範囲であっても効果に大きな影響なく使用できる。
【００１４】
原料比率は、例えば、赤土とキトサンとの相互比率で言えば、赤土５〜５０重量部又はより典型的には赤土１０〜４０重量部の水性抽出液に対して、キトサン５〜２０重量部の割合であり、より限定的には、例えば、赤土１５〜３０重量部の水性抽出液に対してキトサン７〜１５重量部である。ｐＨを酸性側とするのにクエン酸を用いる場合には、各原料間の相互比率は、例えば、赤土５〜５０重量部又はより典型的には赤土１０〜４０重量部の水性抽出液に対して、キトサン５〜２０重量部及びクエン酸５〜２０重量部の割合であり、より限定的には、例えば、赤土１５〜３０重量部の水性抽出液に対してキトサン７〜１５重量部及びクエン酸７〜１５重量部である。
【００１５】
各成分の濃度は、本発明の液剤の使用場所や使用方法、使用目的に応じて適宜決定すればよく、例えば脱臭目的等での噴霧や散布に際し、比較的成分濃度の薄いものを用いても、夏場等の高温であれば水分が蒸発して成分が濃縮されるため、効果に余り影響はない。従って、使用原料の重量に対する水の総量に明確な限界はない。但し、製造上の便宜を考慮すれば余り薄いものを製造するのは無駄が多い。この点から、扱い易い原料比率は、例えば、赤土５から５０重量部又はより典型的には赤土１０〜４０重量部の水性抽出液２０００重量部に対して、キトサン５〜２０重量部とするものである。通常、例えば、赤土１５〜３０重量部の水性抽出液２０００重量部に対してキトサン７〜１５重量部の範囲内、例えば、赤土２０重量部、水２０００重量部及びキトサン１０重量部などの割合で用いて製造を行なえばよい。ｐＨを酸性側とするのにクエン酸を用いる場合には、原料比率は、例えば、赤土５〜５０重量部又はより典型的には赤土１０〜４０重量部の水性抽出液２０００重量部に対して、キトサン５〜２０重量部及びクエン酸５〜２０重量部の割合とするものである。通常、例えば、赤土１５〜３０重量部の水性抽出液２０００重量部に対してキトサン７〜１５重量部及びクエン酸７〜１５重量部の範囲内の割合、例えば、赤土２０重量部、水２０００重量部、キトサン１０重量部及びクエン酸１０重量部などの割合で用いて製造を行なえばよい。
【００１６】
本発明の水性液剤の脱臭効果は強力であり、多様な利用が可能である。密閉された小空間（冷蔵庫、トイレ等）の悪臭の除去のみならず、開かれた空間の悪臭の除去にも極めて効果的である。即ち、冷蔵庫内の臭い、室内の体臭やペット、煙草臭等、家庭内又は公衆トイレの悪臭、家庭の生ゴミや愛玩動物の糞尿の悪臭除去から、環境衛生上しばしば大きな問題となる養鶏場、養豚場、ゴミ処理場の悪臭に至るまで、広範囲の悪臭除去に有効である。本発明の水性液剤を脱臭剤として使用するには、これを例えば雰囲気中に噴霧するか又は悪臭発生源に直接散布すればよい。本発明の水性液剤の脱臭効果は長時間維持され、野外での大量の生ゴミの悪臭除去にも、散布から通常約一週間もの間効果が維持できる。噴霧ないし散布の量は、悪臭の程度により適宜調節すればよい。また煙草の灰皿に噴霧しておけば、灰皿上の煙草の臭いの脱臭に役立つ。
【００１７】
本発明の水性液剤は、食品の脱臭にも使用することができる。更には、キトサンの抗菌作用のため、細菌の増殖を抑制し食中毒の危険性を軽減できると推定される。また、これを漬物等（キムチ）や焼き肉用の肉の製造時に食品添加物として用いることにより、ニンニク等の特有の臭いを脱臭して消費者への商品の受容性を高め、且つ発酵の進行による酸敗を抑制しまた腐敗も抑えて一層長期の保存を可能にする。
【００１８】
更に、本発明の水性液剤について検討を加えていたところ、本発明の水性液剤が界面活性剤としても作用し、洗剤として使用できることが見出された。即ち、動植物性の油性物質を食器類や調理器具等から除去するのに従来の洗剤の代わりに使用できる。また本発明の水性液剤を浸した布でぬぐうという使用方法も、油分を除去するのに用いることができる。また調理台等は、本発明の水性液剤を浸した布でぬぐった後は、表面に残存するキトサンが抗菌作用を有するため、衛生管理上好都合である。
【００１９】
【実施例】
以下、典型的な実施例及び試験例を挙げて本発明をより具体的に説明する。ここでは特定地域の赤土を用いているが、特にこれに限定されない。またｐＨを酸性にするのに以下の実施例ではクエン酸を用いているが、他の酸を適宜用いてもよいことは既に述べた通りである。
＜実施例１＞
大韓民国慶尚南道金海市長有面大清里より採取した赤土２０ｋｇに水２０００Ｌを加えて混合し、３０分間撹拌した後、４８時間静置して上澄液と沈殿を分離した。この上澄液（赤土抽出液）約２０００Ｌに、キトサン（フローナックＮ：共和テクノス（株））１０ｋｇを加えた後、撹拌しながらクエン酸１０ｋｇを約２時間かけて徐々に添加して溶解させた。その後、断続的に撹拌を行い、キトサンが完全に溶解したことを確認した（ｐＨ２〜３）。この溶液を、適当な大きさの噴霧用容器、又は小分け容器に分注して本発明の水性液剤とした。別に、赤土上澄液の代わりに水を用いて同様に調製して対照キトサン液を作成した。
【００２０】
＜試験例１＞生ゴミの腐敗臭に対する脱臭効果
市販の白菜１０ｋｇを細切してポリバケツに入れ、時々水を添加し、３週間かけて腐敗させた材料を４個のポリ容器に分け、それぞれ実施例１の本発明水性液剤、対照キトサン液、赤土抽出液、及び水の何れかを噴霧した後、１０名の官能試験者によって悪臭の強さの判定を行なった。その結果、表１に示すように、対照キトサン液及び赤土抽出液には水と同様脱臭効果が見られなかったのに対し、本発明の水性液剤には極めて強い脱臭効果が確認された。表中の数値は、各被験物につき各臭気強度を回答した被験者数を表す。
【００２１】
【表１】

【００２２】
＜試験例２＞大韓民国釜山市某区役所の飲食物廃棄場での現場実験
飲食物廃棄物約２００トンに実施例１の水性液剤を、第１日目に３００Ｌ、第２日目に２００Ｌ、第３日目に２００Ｌ、合計７００Ｌを廃棄物表面に噴霧器で散布した。散布後、約２時間目より脱臭効果が顕著に認められた。即ち、散布前は生ゴミから約２００ｍ離れた地点でも耐え難い程の悪臭が感じられたが、散布２時間後には５〜６ｍ離れた地点でも悪臭は認められず、その脱臭効果は次の新たな廃棄物が運び込まれるまで、約１週間持続した。
【００２３】
＜試験例３＞大韓民国釜山市内養鶏場の糞尿臭に対する脱臭効果
養鶏場の糞尿を集めて混合した後、４個のポリ容器に分け、試験例１と同様にして悪臭の強さの判定を行なった。その結果、表２に示すように、対照キトサン液及び赤土抽出液には水と同様脱臭効果が見られなかったのに対し、本発明水性液剤には、極めて強い脱臭効果が確認された。
【００２４】
【表２】

【００２５】
＜試験例４＞大韓民国釜山市内養鶏場での現場実験
上記養鶏場全体に実施例１の本発明水性液剤を噴霧したところ、約２０分後には、噴霧前と比較して、糞尿臭が劇的に減弱した。
【００２６】
＜試験例５＞猫の糞尿臭に対する脱臭効果
猫の糞尿床（砂を敷き詰めたもの）２日分のものを２等分し、それらに実施例１の本発明水性液剤と水の何れかを噴霧した後、試験例１と同様にして悪臭の強さの判定を行なった。その結果、表３に示すように、本発明の水性液剤は糞尿臭を著しく減少させた。
【００２７】
【表３】

【００２８】
＜試験例６＞煙草のヤニ臭に対する脱臭効果
煙草の吸殻が一杯になった灰皿より、吸殻を２等分し、その一方に実施例１の本発明水性液剤を霧状に噴霧した後、試験例１と同様にしてヤニ臭の強さの判定を行なった。その結果、表４に示すように、本発明の水性液剤はヤニ臭を消去したことが確認された。
【００２９】
【表４】

【００３０】
＜試験例７＞食品添加剤としての食品改質効果
キムチを漬けるに際して、実施例１の本発明水性液剤を、塩漬け工程で主原料（白菜、大根等）の重量に対して２０〜２５重量％相当、また味付材の調理工程で、主原料の重量に対し約５重量％相当添加し、それ以外は通常通りにしてキムチを製造した。このようにして製造したキムチには、次の品質改善が認められた。
（１）発酵時間が遅延し、長期間（１月以上）酸っぱくならず、賞味期間が延長した。
（２）塩から味、辛味が抑制されたが基本的風味には変わりがなく、味がまろやかになると共に、唐辛子、ニンニク等の独特の臭いが消失した。
【００３１】
＜試験例８＞食品添加剤としての食品改質効果
焼き肉用の牛肉（ニンニク臭が強い）に、実施例１の本発明水性液剤を少量振りかけた後、暫く熟成させた。約３０分後には、ニンニク臭は完全に消え、肉を焼いた後賞味したが、味はまろやかになり、風味が倍加されていた。
【００３２】
＜試験例９＞洗浄効果
実施例１の本発明水性液剤の少量を水に混ぜて、動物性又は植物性油脂の付着した調理器具及び食器類を洗浄したところ、動物性油脂は冷水又は温水の何れでもきれいに洗浄でき、植物性油脂は約２０℃の温水できれいに洗浄できた。また、本水性液剤を使い捨て用紙布に降りかけた後、動物性又は植物性油脂が付着した食器をぬぐうことにより、油脂をほぼ完全に拭き取ることができた。更には、一般に販売されている厨房洗剤では拭き取り困難な、長期間に亘ってこびりついた油性汚れも、本水性液剤を降りかけた布で擦ることでほぼ完全に除去することができた。
【００３３】
【発明の効果】
本発明は、強力な脱臭効果、食品改質効果、及び強い洗浄効果を有し、環境衛生上問題となる種々の悪臭の除去、食品の風味及び保存性の向上、及び調理器具等に長期間こびり付いた油汚れの除去等を可能にする。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to aqueous solutions and methods for deodorization, cleaning and food modification. More specifically, the present invention relates to an aqueous extract of red soil and an aqueous solution containing chitosan dissolved at an acidic pH and useful as a deodorant, a food modifier and a detergent, and a method for deodorizing the same.
[0002]
[Prior art]
The antibacterial effects of chitin and chitosan contained in crab and shrimp shells are well known. Chitin is a component contained in the cuticle of the outer shell of crustaceans and insects, and its production in the living world is estimated to be 100 billion tons per year. Chitosan is produced industrially by using chitin as a raw material and deacetylating it with a heated alkaline solution.
[0003]
The chemical structure of chitosan, a natural polymer, is very similar to that of cellulose, and shows stronger intermolecular bonding force due to the amino groups present in the molecule. Chitosan has various uses, and is used as a health food due to its physiological effects such as decholesterolism, blood pressure lowering, and immune enhancement. Chitosan is insoluble in water but soluble in dilute acid and has an amino group, so it is used as a heavy metal adsorbent and as a remover for acidic substances such as nucleic acids and endotoxins. Also, because of its good decomposability by microorganisms, it is also used as a cationic activated sludge flocculant.
[0004]
On the other hand, as a method for deodorizing odors, conventionally, a deodorant using activated carbon has been widely used as an adsorption type deodorant, but this type of deodorant has a low deodorizing ability under high temperature and high humidity conditions in summer. Have been reported. On the other hand, JP-A-3-182259 discloses a water-insoluble chemical deodorant comprising a complex powder of chitosan and a metal inorganic acid salt and an organic acid salt. Also, Japanese Patent Application Laid-Open No. 6-65019 discloses a deodorant comprising a mixture of wood vinegar and modified chitosan.
[0005]
However, there is no known means for effectively deodorizing a large amount of garbage discharged from each household or a bad odor from a large odor source such as a poultry farm or a pig farm. Garbage is often incinerated, which is costly. On the other hand, garbage can be a raw material of organic fertilizer by recycling, but the huge amount of collected garbage emits strong odor due to decay, which hinders the implementation of such organic fertilizer. That is one factor. Although it is not a large-scale odor source, odors from sand and gravel in pet toilets often pose a problem in life, but there is no known method of effectively blocking the generation of these odors.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to provide a deodorant having a strong deodorizing effect and a deodorizing method which can be used in a wide range in view of such a situation.
[0007]
[Means for Solving the Problems]
Red clay (formally referred to as "red clay") is a fine-grained pelagic sediment exhibiting a reddish tan to dark brown colour, low organic carbon content, iron (III) and It is an oxidative sediment with a high manganese (IV) hydrated oxide content. Regarding the relationship between red soil and deodorization, we do not know what has been reported so far, but the present inventors dissolved chitosan and citric acid in an aqueous extract of red soil, and found that the deodorizing effect of chitosan was It has been found that it is significantly enhanced and can be used as a powerful deodorant, and furthermore such a composition also has a surprisingly good food modifying and excellent cleaning action.
[0008]
That is, the present invention provides an aqueous solution containing an aqueous extract of red soil and chitosan dissolved at an acidic pH. The aqueous solution enables use in a wide range of situations as a powerful deodorant which significantly enhances the conventionally known deodorizing effect of chitosan.
[0009]
Therefore, the present invention also provides a method for deodorizing malodors by spraying such an aqueous solution to a malodor source.
[0010]
Further, the aqueous extract of red soil may be mixed with a solution of chitosan over a malodor source. Accordingly, the present invention further provides a method for deodorizing malodors by spraying both an aqueous extract of red soil and an aqueous solution containing chitosan dissolved at an acidic pH to a malodor source.
[0011]
Further, the aqueous liquid preparation of the present invention can be used as a food additive for modifying foods by deodorizing foods, delaying fermentation and the like, and also as a cleaning agent for oil stains on tableware and cooking utensils. Accordingly, the present invention provides not only deodorization but also an aqueous solution as a food additive and a cleaning agent.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
The aqueous liquid preparation of the present invention can be obtained by mixing red soil with an appropriate amount of water and allowing it to stand, and then stirring and dissolving chitosan in the obtained supernatant at an acidic pH. Chitosan is insoluble in water as it is, but is dissolved by adjusting the pH to the acidic side. As a production procedure, an aqueous solution in which chitosan is dissolved in advance at an acidic pH may be mixed with a supernatant of red clay, and the production procedure is not particularly limited. The pH of the resulting solution is usually 1 to 5, more preferably 2 to 3. To make the pH on the acidic side, an acid may be appropriately contained. The acid used here is not particularly limited as long as it is not harmful to the use of the aqueous liquid preparation of the present invention. Accordingly, common organic and inorganic acids such as citric acid, acetic acid, hydrochloric acid, phosphoric acid, maleic acid, succinic acid, and the like may be used. An acid such as citric acid may be added in an amount necessary to dissolve chitosan, but adding an extra acid does not cause any problem.
[0013]
There is no clear limit on the weight ratio between each raw material used. In general, it is a standard that the amount of red clay and the amount of chitosan used are about 2: 1 by weight, but the present invention is not particularly limited to this, and 1: 1 to 4: 1 or more broadly 1: 2. Even in the range of about 8: 1, or even in the range of 1: 4 to 10: 1, it can be used without greatly affecting the effect.
[0014]
The raw material ratio is, for example, in terms of the mutual ratio of red soil and chitosan, 5 to 20 parts by weight of chitosan relative to 5 to 50 parts by weight of red soil or more typically 10 to 40 parts by weight of red soil. The ratio is more specifically, for example, 7 to 15 parts by weight of chitosan based on 15 to 30 parts by weight of an aqueous extract of red clay. When citric acid is used to make the pH acidic, the mutual ratio between each raw material is, for example, 5 to 50 parts by weight of red soil or more typically 10 to 40 parts by weight of red soil relative to the aqueous extract. And 5 to 20 parts by weight of chitosan and 5 to 20 parts by weight of citric acid. More specifically, for example, 7 to 15 parts by weight of chitosan and 15 to 30 parts by weight of citric acid are used for an aqueous extract of 15 to 30 parts by weight of red clay. The acid is 7 to 15 parts by weight.
[0015]
The concentration of each component may be appropriately determined depending on the place and method of use of the liquid agent of the present invention, and the purpose of use.For example, when spraying or spraying for the purpose of deodorization, a relatively low component concentration may be used. If the temperature is high in summer or the like, moisture evaporates and the components are concentrated, so that the effect is not significantly affected. Therefore, there is no clear limit on the total amount of water relative to the weight of the raw materials used. However, in consideration of manufacturing convenience, it is wasteful to manufacture an extremely thin product. From this point, the easy-to-handle raw material ratio is, for example, 5 to 20 parts by weight of chitosan for 5 to 50 parts by weight of red soil or more typically 2000 to 10 parts by weight of aqueous extract of 10 to 40 parts by weight of red soil. It is. Usually, for example, in a range of 7 to 15 parts by weight of chitosan with respect to 2000 parts by weight of an aqueous extract of 15 to 30 parts by weight of red clay, for example, in a ratio of 20 parts by weight of red clay, 2000 parts by weight of water, and 10 parts by weight of chitosan. The production may be performed using the above. When citric acid is used to make the pH acidic, the raw material ratio is, for example, 5 to 50 parts by weight of red soil or more typically 10 to 40 parts by weight of red soil relative to 2000 parts by weight of the aqueous extract. , 5 to 20 parts by weight of chitosan and 5 to 20 parts by weight of citric acid. Usually, for example, a ratio in the range of 7 to 15 parts by weight of chitosan and 7 to 15 parts by weight of citric acid with respect to 2000 parts by weight of the aqueous extract of 15 to 30 parts by weight of red clay, for example, 20 parts by weight of red clay and 2000 parts by weight of water Parts by weight, such as 10 parts by weight of chitosan and 10 parts by weight of citric acid.
[0016]
The aqueous solution of the present invention has a strong deodorizing effect, and can be used in various ways. It is extremely effective not only for removing odors in closed small spaces (refrigerators, toilets, etc.) but also for removing odors in open spaces. That is, poultry farms, which often become a major problem in environmental hygiene, from odors in refrigerators, indoor body odors and pets, tobacco odors, and other odors in households and public toilets, and removal of odors from household garbage and manure from pets, It is effective in removing a wide range of bad smells, from bad odors in pig farms and waste disposal plants. In order to use the aqueous liquid preparation of the present invention as a deodorant, it may be sprayed, for example, into the atmosphere or sprayed directly to the odor source. The deodorizing effect of the aqueous liquid preparation of the present invention can be maintained for a long time, and the effect can be maintained for about one week after spraying, even for removing a bad odor of a large amount of garbage in the field. The amount of spraying or spraying may be appropriately adjusted depending on the degree of malodor. Spraying on a cigarette ashtray also helps to deodorize the smell of cigarettes on the ashtray.
[0017]
The aqueous liquid preparation of the present invention can also be used for deodorizing foods. Furthermore, it is presumed that the antibacterial action of chitosan can suppress the growth of bacteria and reduce the risk of food poisoning. In addition, by using this as a food additive during the production of pickles (kimchi) or meat for grilled meat, the unique odors such as garlic are deodorized to increase the acceptability of the product to consumers, and the fermentation proceeds. It inhibits rancidity due to decay, and also inhibits decay, thereby enabling longer-term storage.
[0018]
Furthermore, when the aqueous solution of the present invention was examined, it was found that the aqueous solution of the present invention also functions as a surfactant and can be used as a detergent. That is, it can be used in place of conventional detergents to remove animal and vegetable oily substances from dishes and cookware. A method of wiping with a cloth soaked with the aqueous liquid agent of the present invention can also be used to remove oil. Further, after the kitchen table or the like is wiped with a cloth soaked with the aqueous liquid preparation of the present invention, chitosan remaining on the surface has an antibacterial action, which is convenient for hygiene management.
[0019]
【Example】
Hereinafter, the present invention will be described more specifically with reference to typical examples and test examples. Here, red soil of a specific area is used, but it is not particularly limited to this. In addition, although citric acid is used in the following examples to make the pH acidic, other acids may be appropriately used as described above.
<Example 1>
2,000 L of water was added to 20 kg of red soil collected from Daecheong-ri, Gyeonghae-nam, Gyeongsangnam-do, Republic of Korea, mixed, stirred for 30 minutes, and allowed to stand for 48 hours to separate a supernatant and a precipitate. To about 2000 L of the supernatant (red soil extract), 10 kg of chitosan (Flownac N: Kyowa Technos Co., Ltd.) is added, and 10 kg of citric acid is gradually added with stirring for about 2 hours to dissolve. Was. Thereafter, stirring was performed intermittently, and it was confirmed that chitosan was completely dissolved (pH 2-3). This solution was dispensed into an appropriately sized spraying container or subdivision container to obtain an aqueous liquid preparation of the present invention. Separately, a control chitosan solution was prepared in the same manner using water instead of the red soil supernatant.
[0020]
<Test Example 1> Deodorizing effect on putrefaction odor of garbage 10 kg of commercially available Chinese cabbage was cut into plastic buckets, water was added occasionally, and the material which had been putrefused for 3 weeks was divided into four plastic containers, and each of them was divided into four plastic containers. After spraying any of the aqueous liquid preparation of the present invention, the control chitosan solution, the red soil extract, and water of Example 1, the intensity of offensive odor was determined by ten sensory testers. As a result, as shown in Table 1, the control chitosan solution and the red soil extract did not show a deodorizing effect similarly to water, whereas the aqueous liquid preparation of the present invention confirmed an extremely strong deodorizing effect. The numerical values in the table represent the number of subjects who answered each odor intensity for each test object.
[0021]
[Table 1]

[0022]
<Test Example 2> Field experiment at a food waste disposal site at a certain ward office in Busan, Republic of Korea The aqueous liquid of Example 1 was added to approximately 200 tons of food waste, 300 L on the first day, 200 L on the second day, On the third day, 200 L, a total of 700 L, was sprayed on the waste surface with a sprayer. A remarkable deodorizing effect was observed about 2 hours after spraying. In other words, before spraying, an unpleasant odor was felt even at a point about 200 m away from the garbage, but two hours after spraying, no odor was recognized even at a point 5 to 6 m away, and the deodorizing effect was the next new one. It lasted about a week before the waste was carried in.
[0023]
<Test Example 3> Deodorizing effect on manure at the poultry farm in Busan, Republic of Korea After collecting and mixing manure at the poultry farm, it was divided into four plastic containers and the intensity of malodor was determined in the same manner as in Test Example 1. Done. As a result, as shown in Table 2, the control chitosan solution and the red soil extract did not show a deodorizing effect like water, whereas the aqueous liquid preparation of the present invention confirmed an extremely strong deodorizing effect.
[0024]
[Table 2]

[0025]
<Test Example 4> Field experiment at a poultry farm in Busan city, Republic of Korea When the aqueous solution of the present invention of Example 1 was sprayed on the entire poultry farm, after about 20 minutes, the smell of feces and urine was greater than before spraying. Attenuated.
[0026]
<Test Example 5> Deodorizing effect on feces and urine odor of cats Cat feces urine bed (paved with sand) for 2 days was divided into two equal parts, and either of the aqueous liquid preparation of the present invention of Example 1 and water was added thereto. After spraying, the odor intensity was determined in the same manner as in Test Example 1. As a result, as shown in Table 3, the aqueous liquid preparation of the present invention significantly reduced feces and urine odor.
[0027]
[Table 3]

[0028]
<Test Example 6> Deodorizing effect on cigarette odor The cigarette butts were divided into two equal parts from an ashtray full of cigarette butts, and one of them was sprayed with the aqueous liquid preparation of the present invention of Example 1 in the form of a mist. In the same manner as in Example 1, the intensity of the tar smell was determined. As a result, as shown in Table 4, it was confirmed that the aqueous liquid preparation of the present invention eliminated the smell of tar.
[0029]
[Table 4]

[0030]
Test Example 7 Food Modifying Effect as Food Additive When pickling kimchi, the aqueous liquid preparation of the present invention of Example 1 was used in the salting step in an amount of 20 to 25% by weight with respect to the weight of the main raw materials (such as Chinese cabbage and radish). In addition, in the cooking process of the seasoning material, kimchi was produced in the usual manner except that about 5% by weight was added to the weight of the main raw material. The following quality improvements were observed in the kimchi thus produced.
(1) The fermentation time was delayed, and it was not sour for a long time (1 month or more), and the shelf life was extended.
(2) The taste and pungency were suppressed from the salt, but the basic flavor was not changed, the taste became rounder, and the unique odors such as pepper and garlic disappeared.
[0031]
<Test Example 8> Food modification effect as a food additive A small amount of the aqueous liquid preparation of the present invention of Example 1 was sprinkled on beef for grilled meat (having a strong garlic odor) and then aged for a while. After about 30 minutes, the garlic smell had completely disappeared, and the meat was roasted and tasted, but the taste was rounded and the flavor was doubled.
[0032]
<Test Example 9> Washing effect A small amount of the aqueous liquid preparation of the present invention of Example 1 was mixed with water to wash cooking utensils and dishes to which animal or vegetable fats and oils had adhered. The animal fats and oils were cold or hot water. Any of them could be washed cleanly, and the vegetable fats and oils could be washed cleanly with warm water of about 20 ° C. Also, after the aqueous solution was dropped on a disposable paper cloth, the tableware to which animal or vegetable fats and oils were adhered was wiped off the fats and oils almost completely. Furthermore, oily stains which are difficult to wipe off with commercially available kitchen detergents and which have stuck for a long period of time can be almost completely removed by rubbing with a cloth on which the aqueous liquid preparation has fallen.
[0033]
【The invention's effect】
INDUSTRIAL APPLICABILITY The present invention has a strong deodorizing effect, a food modifying effect, and a strong cleaning effect, removes various odors which are environmentally problematic, improves the flavor and preservability of food, and can be used for a long time in cooking utensils and the like. It enables removal of stuck oil stains.

Claims

Korea and Gyeongsangnam Gimhae mayor Yumen large Kiyosato aqueous extract of red clay taken from the aqueous cleaning solution comprising chitosan dissolved in acidic pH as a cleaning component.

The weight ratio of red clay and chitosan 1 used: 4 to 10: 1 is, aqueous cleaning solutions according to claim 1.

PH of the aqueous solution is from 1 to 5, claim 1 or 2 in aqueous cleaning solutions.

4. The aqueous solution according to claim 1, wherein the aqueous solution contains chitosan in an amount of 5 to 20 parts by weight relative to an aqueous extract from 5 to 50 parts by weight of red clay. any of the aqueous cleaning solution.

The liquid in 2000 parts by weight, an aqueous extract from red clay 5-50 parts by weight, characterized in that it comprises a chitosan dissolved in 5 to 20 parts by weight, the aqueous cleaning solution of claim 4.

Citric acid, acetic acid, hydrochloric acid, phosphoric acid, containing which may be acid those selected from the group consisting of maleic acid and succinic acid, either aqueous cleaning solution according to claim 1 to 5.

In the aqueous solution, the amount of dissolved chitosan is 5 to 20 parts by weight, and the amount of dissolved citric acid is 5 to 20 parts by weight based on the aqueous extract from 5 to 50 parts by weight of red clay. characterized in that it comprises in a ratio of aqueous cleaning solutions according to claim 6.

2,000 parts by weight of the liquid preparation contains an aqueous extract from 5 to 50 parts by weight of red clay, 5 to 20 parts by weight of dissolved chitosan, and 5 to 20 parts by weight of dissolved citric acid. to an aqueous wash solution of claim 7.