JP4655612B2 - Processing method of dehydrated cake - Google Patents
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Description
本発明は、海棲生物の破砕物等を脱水して得られる脱水ケーキの処理方法に関し、特に、脱水ケーキを固化させる脱水ケーキの処理方法に関する。 The present invention relates to a method for treating a dehydrated cake obtained by dewatering crushed marine organisms, and more particularly to a method for treating a dehydrated cake that solidifies the dehydrated cake.
貝やクラゲ等の海棲生物を破砕した破砕物等の有機性汚泥を脱水した脱水ケーキはたんぱく質を含み、また含水率も７０〜８０重量％程度と高いため、腐敗して悪臭を発生させやすく、軟弱で取り扱いが困難である。このため、脱水ケーキを埋め立てる場合や、土壌改良剤として利用する場合、悪臭防止や、脱水ケーキの強度向上を目的とした種々の脱水ケーキの処理方法が提案されている。 Dehydrated cake from organic sludge such as crushed sea shells such as shellfish and jellyfish contains protein and has a high water content of about 70 to 80% by weight. It is soft and difficult to handle. For this reason, when dewatering cake is reclaimed or used as a soil conditioner, various methods for treating dehydrated cake have been proposed for the purpose of preventing malodor and improving the strength of dehydrated cake.
例えば特許文献１には、脱水ケーキを好気的条件下で発酵させることにより、腐敗による悪臭の発生を防止して土壌改良剤として利用する方法が開示されている。特許文献１に開示された方法によれば、取水路等に付着した貝を破砕した泥状の破砕物および排水処理で生じる汚泥を含む脱水ケーキに、木屑を粉砕した粉砕木屑を加えて微生物の存在下で発酵させることにより、有機性汚泥を土壌改良剤として利用することができる。 For example, Patent Document 1 discloses a method in which a deodorized cake is fermented under aerobic conditions to prevent generation of malodor due to spoilage and to be used as a soil conditioner. According to the method disclosed in Patent Document 1, crushed wood waste obtained by pulverizing wood waste is added to a dehydrated cake containing sludge produced by smashing shellfish adhering to an intake channel or the like and sludge generated by wastewater treatment, and microorganisms are removed. By fermenting in the presence, organic sludge can be used as a soil conditioner.
また、脱水ケーキの強度を高める方法としては、セメント等の無機系の固化剤を脱水ケーキに添加して混合する方法が行なわれている。
しかし脱水ケーキを発酵させるためには長時間を要する。一方、脱水ケーキの強度を高めるために、セメント等のアルカリ性物質を添加すると、脱水ケーキのｐＨが高くなることにより悪臭の原因物質であるアンモニアやアミン類が放散されるおそれがある。 However, it takes a long time to ferment a dehydrated cake. On the other hand, when an alkaline substance such as cement is added in order to increase the strength of the dehydrated cake, the pH of the dehydrated cake is increased, which may cause ammonia and amines that cause malodor to be diffused.
そこで本発明は、脱水ケーキからの悪臭の発生を抑制し、また、脱水ケーキの強度を向上させることができる脱水ケーキの処理方法を提供することを目的とする。 Then, this invention aims at providing the processing method of the dewatering cake which can suppress generation | occurrence | production of the malodor from a dewatering cake and can improve the intensity | strength of a dewatering cake.
本発明は、脱水ケーキに茶滓の粉状物を添加して混練することを特徴とする。具体的には、本発明は以下を提供する。 The present invention is characterized in that a powdered material of tea bowl is added to a dehydrated cake and kneaded. Specifically, the present invention provides the following.
（１）海棲生物を脱水した脱水ケーキに、平均粒子１００〜８００μｍ、かつ、含水率１５重量％以下である茶滓の粉状物を前記脱水ケーキの５重量％以上添加して混合する脱水ケーキの処理方法。 (1) Dehydration in which 5% by weight or more of the dehydrated cake is added to and mixed with a dehydrated cake obtained by dewatering marine organisms with an average particle size of 100 to 800 μm and a moisture content of 15% by weight or less. Cake processing method.
（２） 前記脱水ケーキに固化剤をさらに添加して混合する（１）に記載の脱水ケーキの処理方法。 (2) The method for treating a dehydrated cake according to (1), wherein a solidifying agent is further added to and mixed with the dehydrated cake.
（３） 前記固化剤はセメントである（２）に記載の脱水ケーキの処理方法。 (3) The method for treating a dehydrated cake according to (2), wherein the solidifying agent is cement.
（４） 前記茶滓の粉状物の前記脱水ケーキへの添加量を、前記脱水ケーキの１０重量％以上とする（１）から（３）のいずれかに記載の脱水ケーキの処理方法。 (4) The method for treating a dehydrated cake according to any one of (1) to (3), wherein an addition amount of the powdered tea bowl to the dehydrated cake is 10% by weight or more of the dehydrated cake.
本発明の方法において、処理対象とする海棲生物は、主に海水を冷却水として取り入れる水路に付着するムラサキ貝や、同水路に流入するクラゲであるが、ホタテ貝の加工において廃棄される腹ワタ等も対象とできる。「脱水ケーキ」は、スクリュープレス型脱水機、ベルトプレス型脱水機、フィルタープレス型脱水機、および遠心脱水機等で前述した海棲生物を機械的に脱水することにより得られ、含水率が７０〜８０重量％の土塊状の固形物である。 In the method of the present invention, marine organisms to be treated are mussels that adhere mainly to waterways that take in seawater as cooling water, and jellyfish that flow into the waterways, but they are discarded in the processing of scallops. Cotton can also be targeted. The “dehydrated cake” is obtained by mechanically dehydrating the aforementioned marine organisms with a screw press dehydrator, a belt press dehydrator, a filter press dehydrator, a centrifugal dehydrator or the like, and has a water content of 70. It is ˜80% by weight of a solid mass.
「茶滓の粉状物」とは、茶飲料の製造過程で発生する茶滓の乾燥粉砕物であり、平均粒径１００〜８００μｍ程度、含水率１５重量％程度以下であることが好ましい。茶滓の粉状物は、水分を含んだ状態の茶滓をカッターミルおよび湿式ミルで破砕して泥状にした後、この泥状物を乾燥させることにより得ることができ、あるいは、茶滓を乾燥させた後、カッターミル等で破砕して得てもよい。 The “tea bowl powder” is a dried and ground tea bowl produced in the process of manufacturing a tea beverage, and preferably has an average particle size of about 100 to 800 μm and a moisture content of about 15% by weight or less. The tea cake powder can be obtained by crushing a tea bowl containing moisture with a cutter mill and a wet mill to form a mud, and then drying the mud. After drying, it may be obtained by crushing with a cutter mill or the like.
茶滓の粉状物は、粒径が小さすぎると、繊維が細かくなりすぎることにより架橋効果が低下して脱水ケーキを固化させる効果が低下する。一方、粒径が大きすぎると脱水ケーキと均一に混合することが困難となり、脱水ケーキの処理時間が長くなる等の処理効率の低下を招く。また、茶滓の粉状物の含水率が１５重量％を超える場合は、カビが繁殖しやすくなり、茶滓乾燥物の保存性が低下する。 If the particle size of the tea bowl powder is too small, the effect of solidifying the dehydrated cake is reduced because the fiber is too fine and the crosslinking effect is reduced. On the other hand, if the particle size is too large, it becomes difficult to uniformly mix with the dehydrated cake, and the processing efficiency of the dehydrated cake becomes long, resulting in a decrease in processing efficiency. Moreover, when the moisture content of the powdered material of a teacup exceeds 15 weight%, mold | fungi will be easy to propagate and the preservability of a teacup dried material will fall.
茶滓の粉状物は、湿潤重量での脱水ケーキに対して、５〜２０重量％、特に５〜１５重量％程度の割合で混合することが好ましい。脱水ケーキに固化剤の添加を行なわずに、茶滓の粉状物のみを添加する場合は、茶滓の粉状物の添加量は５〜２０重量％、特に８〜１５重量％とすることが好ましい。茶滓の粉状物の添加量が少なすぎると、脱水ケーキの悪臭抑制および固化効果が得られず、添加量を過大にしても固化等の効果は飛躍的に増大せず、処理済脱水ケーキの量が多くなるため、好ましくない。 It is preferable that the tea cake powder is mixed at a ratio of about 5 to 20% by weight, particularly about 5 to 15% by weight, with respect to the dehydrated cake in a wet weight. When adding only the powdered tea bowl without adding a solidifying agent to the dehydrated cake, the added amount of the powdered tea bowl should be 5 to 20% by weight, especially 8 to 15% by weight. Is preferred. If the amount of tea powder added is too small, it will not be possible to suppress the malodor and solidification effect of the dehydrated cake, and even if the amount added is excessive, the effect of solidification will not increase dramatically, and the treated dehydrated cake will not increase. This is not preferable because of the large amount.
茶滓の原料は、「緑茶」と総称される不発酵茶を用いてもよく、またはウーロン茶、紅茶、プーアル茶等の発酵茶を用いてもよい。緑茶は、茶ポリフェノールの中でもカテキン類を多く含み、カテキン類は乳酸菌やビフィズス菌を除く細菌に対する抗菌効果が高いため、特に好適に使用できる。 The raw material of the tea bowl may be non-fermented tea, which is generically called “green tea”, or fermented tea such as oolong tea, black tea, and puer tea. Green tea contains a large amount of catechins among tea polyphenols, and catechins are particularly suitable because they have a high antibacterial effect on bacteria excluding lactic acid bacteria and bifidobacteria.
脱水ケーキには、茶滓の粉状物以外に固化剤を添加してもよい。固化剤は、粒子を取り込んで硬化する性質を有する物質を指し、具体的には、ポルトランドセメント等のセメント、石灰および石膏等の無機系の固化剤が挙げられる。固化剤としてアルカリ性を示すセメントまたは石灰を使用すると、脱水ケーキの強度をより高めることができ、また、茶滓の粉状物に含まれるポリフェノールが脱水ケーキのｐＨの上昇を抑制することにより悪臭物質の気散を防止し、さらに、アニオン化したポリフェノールが、カチオン化したアンモニアやアミン類等の悪臭物質とイオン的に結合するため、より高い悪臭抑制効果を得ることができる。ここで、固化剤の添加量は、湿潤重量での脱水ケーキに対して２〜１０重量％、特に３〜８重量％の割合とすることが好ましい。また、特にアルカリ性の固化剤を使用する場合、茶滓の粉状物の添加量は５〜２０重量％とすることが好ましい。 A solidifying agent may be added to the dehydrated cake in addition to the tea cake powder. The solidifying agent refers to a substance having a property of taking in particles and hardening, and specifically includes cements such as Portland cement, and inorganic solidifying agents such as lime and gypsum. When cement or lime showing alkalinity is used as a solidifying agent, the strength of the dehydrated cake can be further increased, and the polyphenol contained in the powdered rice cake suppresses the increase in the pH of the dehydrated cake, thereby causing malodorous substances. In addition, since the anionized polyphenol ionically binds to malodorous substances such as cationized ammonia and amines, a higher malodor control effect can be obtained. Here, the amount of the solidifying agent added is preferably 2 to 10% by weight, particularly 3 to 8% by weight, based on the dehydrated cake in wet weight. In particular, when an alkaline solidifying agent is used, the addition amount of the tea cake powder is preferably 5 to 20% by weight.
脱水ケーキは、茶滓の粉状物を添加した後、混練機で１〜１０分程度、混練することにより脱水ケーキと均一になるように混合する。茶滓の粉状物と固化剤とを添加する場合は、固化剤と茶滓の粉状物は予め混合した状態で添加してもよく、別々に添加してもよい。固化剤と茶滓の粉状物とを別々に脱水ケーキに添加する場合、固化剤と茶滓の粉状物とは別々の経路から同じタイミングで脱水ケーキに添加してもよく、一方を添加した後、他方を添加するようにしてもよい。後者の場合、添加順序は特に限定されないが、茶滓を脱水ケーキに先に添加する方が好ましい。 The dehydrated cake is mixed so as to be uniform with the dehydrated cake by kneading for about 1 to 10 minutes with a kneader after adding the powdered rice cake. When adding the tea powder and the solidification agent, the solidification agent and the tea powder may be added in a premixed state or separately. When adding the solidifying agent and the tea cake powder separately to the dehydrated cake, the solidifying agent and the tea cake powder may be added to the dehydrated cake at the same timing from different routes, or one of them is added. After that, the other may be added. In the latter case, the order of addition is not particularly limited, but it is preferable to add the teacup to the dehydrated cake first.
本発明によれば、茶滓の粉状物に含まれるポリフェノール類の作用により、脱水ケーキからの悪臭の放出が抑制され、また、茶滓の粉状物に含まれる繊維質の吸水および架橋効果により、脱水ケーキの固化を促進できる。特に、茶滓の粉状物とセメントとを併用すると、脱水ケーキの強度向上の効果を高め、かつ、悪臭の発生を抑制できる。 According to the present invention, the action of polyphenols contained in the powdered tea bowl suppresses the release of malodor from the dehydrated cake, and the water absorption and crosslinking effects of the fibers contained in the powdered tea bowl. Thus, solidification of the dehydrated cake can be promoted. In particular, the combined use of a tea bowl powder and cement can enhance the effect of improving the strength of the dehydrated cake and suppress the generation of malodor.
以下、実施例に基づいて本発明について詳細に説明する。 Hereinafter, the present invention will be described in detail based on examples.
［実施例１］
実施例１として、海水取水路に付着した貝類を剥離し、貝殻と砂を除去した後、脱水した脱水ケーキ（含水率７０重量％）１００ｇを、容量５００ｍｌのポリエチレン製の密閉容器に入れ、緑茶を原料とした茶滓の粉状物を５ｇ添加して、スパチュラでかき混ぜることにより粉状物と脱水ケーキとを混合した後、容器を密閉した。密閉した容器は、３０℃で静置し、内蓋に設けたサンプリング用の開口から定期的に内部のガスを採取し、ガス中のアンモニア濃度をアンモニア検知管で測定した。また、ガス中の硫化水素、メチルメルカプタン、および酢酸についても濃度を測定した。なお、茶滓の粉状物は、緑茶（煎茶）を８０℃の温水に浸漬して緑茶飲料を製造することにより生じた茶滓（脱水後の含水率７３重量％）を真空乾燥後、カッターミルで粉砕して得たもので、平均粒径は４００μｍ、含水率は６．１重量％であった。
[Example 1]
As Example 1, after removing shells adhering to the seawater intake channel and removing shells and sand, 100 g of dehydrated dehydrated cake (water content 70% by weight) was put into a 500 ml polyethylene sealed container, and green tea After adding 5 g of the powdered tea bowl made of the raw material and stirring with a spatula, the powdered product and the dehydrated cake were mixed, and then the container was sealed. The sealed container was allowed to stand at 30 ° C., and the internal gas was periodically collected from a sampling opening provided in the inner lid, and the ammonia concentration in the gas was measured with an ammonia detector tube. The concentrations of hydrogen sulfide, methyl mercaptan, and acetic acid in the gas were also measured. In addition, the powdered material of the teacup was dried by vacuum drying the teacup (water content 73% by weight after dehydration) produced by immersing green tea (sencha) in warm water at 80 ° C. to produce a green tea beverage. It was obtained by pulverizing with a mill and had an average particle size of 400 μm and a water content of 6.1% by weight.
［実施例２］
実施例２として、茶滓の粉状物の添加量を１０ｇにした以外は実施例１と同様にして試験を行なった。
[Example 2]
As Example 2, the test was conducted in the same manner as in Example 1 except that the amount of the powdered rice bowl was changed to 10 g.
［比較例１〜５］
比較例１として、茶滓の粉状物を添加しなかった以外は実施例１と同様にして試験を行なった。また、比較例２〜５については、茶滓の粉状物の添加量を変えた以外は実施例１と同様にして試験を行なった。茶滓の粉状物の添加量は、比較例２について０．２ｇ、比較例３について０．５ｇ、比較例４について１．０ｇ、比較例５について２．０ｇとした。
[Comparative Examples 1-5]
As Comparative Example 1, the test was conducted in the same manner as in Example 1 except that the powdered rice bowl was not added. Moreover, about Comparative Examples 2-5, the test was done like Example 1 except having changed the addition amount of the powdered material of the teacup. The amount of tea powder added was 0.2 g for Comparative Example 2, 0.5 g for Comparative Example 3, 1.0 g for Comparative Example 4, and 2.0 g for Comparative Example 5.
実施例１および２、並びに比較例１〜５について、試験開始時から試験開始後１２日までのアンモニア濃度の測定値を表１に示す。なお、硫化水素、メチルメルカプタン、および酢酸については、いずれの試験例においても検出されなかった。 Table 1 shows the measured values of ammonia concentration for Examples 1 and 2 and Comparative Examples 1 to 5 from the start of the test to 12 days after the start of the test. In addition, hydrogen sulfide, methyl mercaptan, and acetic acid were not detected in any of the test examples.
表１に示すように、茶滓を添加した実施例１および２については、茶滓の粉状物に含まれるポリフェノールの中和作用により、初期アンモニア濃度を低減できた。その後、脱水ケーキの腐敗が進行して酸生成が生じても、数日間は実施例および比較例ともアンモニアが捕捉され、気相中に放出されない。しかし表１に示すとおり、腐敗が進行すると比較例１〜５ではアンモニアが捕捉しきれずに気相中に放出されるが、実施例１および２では、アンモニアが捕捉され、悪臭の発生が防止された。 As shown in Table 1, in Examples 1 and 2 to which the tea bowl was added, the initial ammonia concentration could be reduced by the neutralizing action of the polyphenol contained in the powder of the tea bowl. Thereafter, even if the dehydration cake decays and acid generation occurs, ammonia is trapped and not released into the gas phase for several days in both Examples and Comparative Examples. However, as shown in Table 1, when decay proceeds, in Comparative Examples 1 to 5, ammonia is not captured and released into the gas phase, but in Examples 1 and 2, ammonia is captured and generation of malodor is prevented. It was.
また、比較例１および実施例２について試験開始後１２日目に山中式土壌硬度計を用いて処理済の脱水ケーキの強度を測定した。表２に硬度計の指示値（ｍｍ）およびこの指示値から算出したコーン指数（ｋＮ／ｍ２）を示す。 Moreover, about the comparative example 1 and Example 2, the intensity | strength of the processed dewatering cake was measured using the Yamanaka type | system | group soil hardness meter 12 days after the test start. Table 2 shows the indicated value (mm) of the hardness meter and the cone index (kN / m 2 ) calculated from the indicated value.
表２に示すように、茶滓の粉状物を添加した実施例２については、硬度計の指示値に示されるように、強度が高くなったことが確認され、コーン指数が１００ｋＮ／ｍ２を超える程度まで強度が高められた。 As shown in Table 2, with respect to Example 2 in which the powdered rice bowl was added, it was confirmed that the strength was high as indicated by the indicated value of the hardness meter, and the corn index was 100 kN / m 2. The strength was increased to a level exceeding.
［実施例３および４］
実施例３として、実施例１で用いた脱水ケーキに、固化剤としてポルトランドセメントを添加量５ｇで添加し、次に、実施例１で用いたものと同じ茶滓の粉状物を添加量５ｇで添加し、スパチュラで攪拌して混合した。容器は実施例１と同様に密閉して３０℃で静置し、定期的に容器内部のガス中のアンモニア、硫化水素、メチルメルカプタン、および酢酸の濃度を実施例１と同様にして測定した。実施例４については、茶滓の粉状物の添加量を１０ｇとした以外は、実施例３と同じとした。
[Examples 3 and 4]
As Example 3, Portland cement was added as a solidifying agent to the dehydrated cake used in Example 1 in an addition amount of 5 g, and then the same amount of tea powder used in Example 1 was added in an amount of 5 g. And mixed with stirring with a spatula. The container was sealed in the same manner as in Example 1 and allowed to stand at 30 ° C., and the concentrations of ammonia, hydrogen sulfide, methyl mercaptan, and acetic acid in the gas inside the container were measured in the same manner as in Example 1. About Example 4, it was the same as Example 3 except the addition amount of the powdered material of the teacup having been 10 g.
［比較例６〜１０］
比較例６として、茶滓の粉状物を添加しなかった以外は実施例３と同様にして試験を行なった。また、比較例７〜１０については、茶滓の粉状物の添加量を変えた以外は実施例３と同様にして試験を行なった。茶滓の粉状物の添加量は、比較例７について、０．２ｇ、比較例８について０．５ｇ、比較例９について１．０ｇ、比較例１０について２．０ｇとした。
[Comparative Examples 6 to 10]
As Comparative Example 6, the test was performed in the same manner as in Example 3 except that the powdered rice bowl was not added. Moreover, about Comparative Examples 7-10, the test was done like Example 3 except having changed the addition amount of the powdered material of the teacup. The amount of tea powder added was 0.2 g for Comparative Example 7, 0.5 g for Comparative Example 8, 1.0 g for Comparative Example 9, and 2.0 g for Comparative Example 10.
実施例３および４、並びに比較例６〜１０について、試験開始時から試験開始後１２日までのアンモニア濃度の測定値を表３に示す。なお、硫化水素、メチルメルカプタン、および酢酸については、いずれの試験例においても検出されなかった。 Table 3 shows the measured values of ammonia concentration for Examples 3 and 4 and Comparative Examples 6 to 10 from the start of the test to 12 days after the start of the test. In addition, hydrogen sulfide, methyl mercaptan, and acetic acid were not detected in any of the test examples.
表３に示すように、固化剤としてポルトランドセメントを添加した実施例３および４、並びに比較例６〜１０については、ｐＨが上昇したため、実施例１および２、並びに比較例１〜５に比べて試験開始直後からアンモニア濃度が高くなった。しかし、茶滓の粉状物を固化剤とともに添加した実施例３および４については、徐々にアンモニア臭の抑制効果が得られた。 As shown in Table 3, since the pH increased for Examples 3 and 4 and Comparative Examples 6 to 10 to which Portland cement was added as a solidifying agent, compared with Examples 1 and 2 and Comparative Examples 1 to 5 The ammonia concentration increased immediately after the start of the test. However, in Examples 3 and 4 in which the tea powder was added together with the solidifying agent, the effect of suppressing ammonia odor was gradually obtained.
また、実施例３および４、並びに比較例６について試験開始後１２日目に山中式土壌硬度計を用いて処理済の脱水ケーキの強度を測定した。表４に硬度計の指示値（ｍｍ）およびこの指示値から算出したコーン指数（ｋＮ／ｍ２）を示す。 Moreover, about Example 3 and 4 and the comparative example 6, the intensity | strength of the processed dewatering cake was measured using the Yamanaka type | system | group soil hardness meter 12 days after the test start. Table 4 shows the indicated value (mm) of the hardness meter and the cone index (kN / m 2 ) calculated from this indicated value.
表４に示すように、固化剤とともに、茶滓の粉状物を添加量１０重量％で添加した実施例３および４については、コーン指数が固化剤単独に比べて向上した。 As shown in Table 4, for Examples 3 and 4 in which the powdered tea cake was added at an addition amount of 10% by weight together with the solidifying agent, the corn index was improved as compared with the solidifying agent alone.
以上に示した通り、本発明に従い、脱水ケーキに茶滓の粉状物を添加することにより、脱水ケーキからの悪臭の発生を抑制し、また、脱水ケーキの強度を高めることができる。特に、脱水ケーキに固化剤を添加して脱水ケーキの強度を高める場合は、脱水ケーキに対して５重量％以上の茶滓の粉状物を添加することにより、固化効果を促進するとともに、悪臭の発生を抑制できる。 As described above, according to the present invention, by adding a tea cake powder to the dehydrated cake, the generation of malodor from the dehydrated cake can be suppressed, and the strength of the dehydrated cake can be increased. In particular, when a solidifying agent is added to the dehydrated cake to increase the strength of the dehydrated cake, the solidification effect is promoted by adding 5% by weight or more of the tea cake powder to the dehydrated cake, and a bad odor is added. Can be suppressed.
本発明は、貝やクラゲ等の有機性汚泥を脱水した脱水ケーキの処理に用いることができる。 INDUSTRIAL APPLICABILITY The present invention can be used for treating a dehydrated cake obtained by dehydrating organic sludge such as shellfish and jellyfish.
Claims (4)
The processing method of the dewatering cake in any one of Claim 1 to 3 which makes the addition amount to the said dewatering cake of the powdered material of the said teacup 10 weight% or more of the said dewatering cake.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08206627A (en) * | 1995-01-31 | 1996-08-13 | Chichibu Onoda Cement Corp | Disposal method for waste of fish and shellfish |
| JPH0938184A (en) * | 1995-08-01 | 1997-02-10 | Natl Fedelation Of Agricult Coop Assoc | Night soil dedorization method and feed |
| JP2002177931A (en) * | 2000-12-15 | 2002-06-25 | Kurita Water Ind Ltd | Treatment equipment for marine organism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08206627A (en) * | 1995-01-31 | 1996-08-13 | Chichibu Onoda Cement Corp | Disposal method for waste of fish and shellfish |
| JPH0938184A (en) * | 1995-08-01 | 1997-02-10 | Natl Fedelation Of Agricult Coop Assoc | Night soil dedorization method and feed |
| JP2002177931A (en) * | 2000-12-15 | 2002-06-25 | Kurita Water Ind Ltd | Treatment equipment for marine organism |
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