JPH0760115A - Biodegradable oil adsorbent - Google Patents
Biodegradable oil adsorbentInfo
- Publication number
- JPH0760115A JPH0760115A JP22950093A JP22950093A JPH0760115A JP H0760115 A JPH0760115 A JP H0760115A JP 22950093 A JP22950093 A JP 22950093A JP 22950093 A JP22950093 A JP 22950093A JP H0760115 A JPH0760115 A JP H0760115A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- adsorbent
- agricultural product
- water
- agricultural
- 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
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、油分を含む農産物残渣
等の生分解性農産物材料よりなる廃油の吸着材で、各種
工業より排出される廃工業油や各家庭やレストラン等か
ら排出される廃食用油を効率的に選択吸着し、固形化す
ることにより廃油処理を容易に達成でき、且つ自然環境
下に投棄されても容易に生分解する廃油処理材に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is an adsorbent for waste oil consisting of biodegradable agricultural product materials such as agricultural product residues containing oil, which is discharged from various industrial industries, households, restaurants, etc. The present invention relates to a waste oil treatment material that can easily achieve waste oil treatment by efficiently selectively adsorbing waste edible oil and solidify it, and that is easily biodegraded even if it is discarded in a natural environment.
【0002】[0002]
【従来の技術】石油化学の高度な発達に伴い、原油の掘
削から精製、利用に至る多岐にわたる分野で、油の漏出
や投棄による環境汚染が深刻な事態を招いている。また
可食油の分野でも各家庭の台所から排出される廃食用油
は、生活排水の中でも特に、排水配管の詰まりの原因や
河川や湖沼のBOD(生物的酸素要求量)やCOD(化
学的酸素要求量)の負荷値を上昇させるなど石油化学分
野の場合と同様に深刻な環境汚染の原因となっている。
このような油の自然環境への放出を未然に防ぐために、
吸油フィルターや種々の吸油材料が使用され、今日に至
っている。特に、水系に拡散した油を効率的に集める方
法としては、親油性界面活性剤を処理基材に付与し、油
分のみ選択的に吸着する界面化学的な方法や浮遊した油
分を加圧浮上法などで分離する物理的処理方法などが一
般的に行われている。2. Description of the Related Art With the advanced development of petrochemistry, environmental pollution due to oil leakage and dumping has caused serious problems in various fields from drilling, refining and utilization of crude oil. Also in the field of edible oil, the waste cooking oil discharged from the kitchen of each household is the cause of clogging of drainage pipes, BOD (biological oxygen demand) and COD (chemical oxygen) of rivers and lakes, especially in domestic wastewater. As in the case of the petrochemical field, increasing the load value of the required amount) causes serious environmental pollution.
In order to prevent the release of such oil to the natural environment,
Oil absorbing filters and various oil absorbing materials have been used up to the present day. In particular, as a method for efficiently collecting the oil diffused in the water system, a lipophilic surfactant is applied to the treated base material and a surface chemical method for selectively adsorbing only the oil content or a pressure floating method for floating oil content A physical treatment method such as separation is generally performed.
【0003】[0003]
【発明が解決しようとする課題】油が自然環境へ拡散し
ないように回収や収集する方法として、工業的には、吸
着、固化、分離、浮上など様々な単位操作が採用されて
いる。これらの多くは、油が水中へ拡散している状態か
ら如何に効率よく油を集めるかという観点から、水と油
の分離を速やかに且つ安価に行える方法が採用されてい
るのが実情である。Various unit operations such as adsorption, solidification, separation, and floating are industrially adopted as a method for collecting and collecting oil so as not to diffuse into the natural environment. In many of these, from the viewpoint of how efficiently oil is collected from the state where the oil is dispersed in water, the fact is that a method that can quickly and inexpensively separate water from oil is adopted. .
【0004】水中に拡散した油を集める方法のうち、小
規模に実施される最も簡便な方法としては当該含油水を
予め設置した濾材やフィルターなどの処理材に接触また
は通過させることにより油分を吸着せしめ、水のみを排
出する方法が広くおこなわれている。この場合、水分ま
たは油分の吸着がある程度進み、処理材表面の油吸着能
が低下した時点で処理材を廃棄または交換、洗浄などを
行い、新たに油の吸着能を高めるのが一般的である。Of the methods for collecting oil diffused in water, the simplest method to be carried out on a small scale is to adsorb the oil content by bringing the oil-containing water into contact with or passing through a treatment material such as a filter material or a filter installed in advance. The method of discharging only water is widely used. In this case, it is general that when the water or oil content is adsorbed to a certain extent and the oil adsorbing ability on the surface of the treated material is lowered, the treated material is discarded or replaced or washed to newly enhance the oil adsorbing ability. .
【0005】水と油の混合物と接触する処理材は、油を
選択的に吸着する能力が特別に付与されているものの、
水中に溶け込んでいる様々な物質により油だけでなく各
種の水和物の吸着により総合的な油吸着能力が急激に低
下してしまい処理材の交換頻度が多くなり、使用済処理
材の多量発生によって環境にとって大きな脅威となるよ
うな事態も起きつつある。Although the treating material which comes into contact with the mixture of water and oil has a special ability to selectively adsorb oil,
Adsorption of not only oil but also various hydrates due to various substances dissolved in water drastically reduces the overall oil adsorption capacity, resulting in frequent replacement of processing materials and generation of a large amount of used processing materials. As a result, a situation that is becoming a major threat to the environment is occurring.
【0006】[0006]
【課題を解決するための手段】処理材は、表面は親油性
に富み、且つ、処理材自体が自然界において有害な存在
にならないことが要求される。このように吸油特性と処
理材が容易に処理できる性質というそれぞれ別個の特性
を具備することが不可欠である。The treatment material is required to be highly lipophilic on the surface and not to be a harmful substance in nature. Thus, it is indispensable to have the separate characteristics of the oil absorption characteristics and the characteristics that the treating material can be easily treated.
【0007】すなわち本発明者らは、環境保全上好まし
い油吸着処理材としては、処理材表面あるいは処理材自
体が高度な親油性、吸油性と生分解性を有していること
が必要であると考え、種々検討した結果、農産物を一定
の粒度に加工し、かつ油分を1重量%以上含有させるこ
とによりこの目的を達成し得ることを見出し、本発明を
完成した。本発明で使用する農産物としては、吸油性を
有する生分解性農産物であれば使用できる。油分として
は、特に自然界で分解しやすい脂肪酸エステル系の油脂
を含有していることが生分解性の観点から望ましい。[0007] That is, the inventors of the present invention need to have a high lipophilicity, oil absorption and biodegradability on the surface of the treated material or on the treated material itself as an oil adsorption treatment material which is preferable from the viewpoint of environmental protection. As a result of various studies, the inventors have found that this object can be achieved by processing agricultural products into a certain particle size and containing 1% by weight or more of an oil component, and completed the present invention. As the agricultural product used in the present invention, any biodegradable agricultural product having an oil absorption property can be used. From the viewpoint of biodegradability, it is desirable that the oil content contains a fatty acid ester-based oil or fat that is easily decomposed in nature.
【0008】農産物の多くは、種子などに多くの油分を
含んでおり、これらの種子のうちトウモロコシや大豆、
菜種、綿実、ひまわり、ごま、ヤシ、紅花などは食用油
脂原料となる農産物として専らその目的のために栽培さ
れている。これらの含油農産物から搾油工程で油分が抽
出(脱油)された後であっても、これら農産物には若干
の油分が残存している。また、トウモロコシの乾式粉砕
工程を経て生産された粉砕物であるコーンフラワーでは
20数%に及ぶ油分を含有している。このため、それらの
表面は撥水性を有すると共に、油脂類との親和性が極め
て良好であることはよく知られている。また、農産物
は、植物体としての特性からその組織構造上に空隙を多
く有し、液状物質を多量に吸蔵し得る能力を保持してい
る。このように繊維質に富み内部空間を豊富に有してい
る農産物材料は、それ自体で液体の吸着・吸収媒体とし
て優れている。Many agricultural products contain a large amount of oil in seeds, and among these seeds, corn, soybean,
Rapeseed, cottonseed, sunflower, sesame, palm, safflower, etc. are cultivated exclusively for that purpose as agricultural products that are raw materials for edible oils and fats. Even after oil is extracted (deoiled) from these oil-containing agricultural products in the oil pressing process, some oil remains in these agricultural products. In addition, corn flour, which is a crushed product produced through the dry crushing process of corn,
It contains up to 20% oil. Therefore, it is well known that their surface has water repellency and has extremely good affinity with fats and oils. In addition, agricultural products have many voids in their tissue structure due to their characteristics as plants, and retain the ability to occlude a large amount of liquid substances. As described above, the agricultural product material which is rich in fibers and rich in the internal space is itself excellent as a liquid adsorption / absorption medium.
【0009】しかし、このような状態にあっても含油成
分を含まない農産物材料は、極めて良好な水吸収材とし
て機能するため、水中に分散した重油や台所の流しから
の油のように水中油滴型の油については少ししか回収で
きず、吸着材自体は水で水和、膨潤した状態になり、油
の吸着処理材としての機能が発揮できなくなってしま
う。本発明者らは種々検討の結果、非油脂原料農産物の
ような非含油農産物からの材料については1重量%以上
の油分を添加、含浸せしめると、上記含油農産物材料と
同様に撥水性、親油性ならびに吸油能力を著しく向上さ
せることができることを見出した。非含油農産物材料と
しては、モミガラ、稲藁、麦藁、ソバガラなど種々の非
含油農産物残渣が用いられる。However, even in such a state, since the agricultural product material containing no oil-containing component functions as a very good water absorbent, it is possible to use oil-in-water such as heavy oil dispersed in water or oil from a kitchen sink. Droplet-type oil can be recovered only a little, and the adsorbent itself becomes hydrated and swollen with water, and the oil cannot function as an adsorption treatment material. As a result of various studies, the present inventors have found that when a material from a non-oil-containing agricultural product such as a non-oil and fat raw material agricultural product is added and impregnated with 1% by weight or more of oil content, it is water-repellent and lipophilic like the above-mentioned oil-containing agricultural product material. It was also found that the oil absorption capacity can be significantly improved. As the non-oil-containing agricultural product material, various non-oil-containing agricultural product residues such as rice husk, rice straw, wheat straw, and buckwheat are used.
【0010】従来から液状可食油の固形化処理により粉
末油を製造する方法において、このように吸着性良好な
可食性物質を油の吸着媒として使用し、吸着後、粉末油
として取り扱えるようにする方法がある。この方法にお
ける吸収材としての可食性農産物は、油吸着能を高める
ためできるだけ表面積を広くとることが必要である。こ
こでは吸着材に供給される液体は可食油に限定されるの
で、吸着後他の液体を排除する必要がない。従って、本
発明において用いられるような水と油を効率的に選択、
吸着するような作用は求められていない。Conventionally, in a method for producing a powder oil by solidifying a liquid edible oil, such an edible substance having good adsorptivity is used as an oil adsorbent so that it can be handled as powder oil after adsorption. There is a way. It is necessary for the edible agricultural product as an absorbent in this method to have as large a surface area as possible in order to enhance the oil adsorption capacity. Since the liquid supplied to the adsorbent is limited to edible oil here, it is not necessary to remove other liquids after adsorption. Therefore, efficiently selecting water and oil as used in the present invention,
No action of adsorption is required.
【0011】本発明に用いる農産物材料よりなる油吸着
材は、油と水の分別吸着が効率良く行われなければなら
ないので、農産物材料の粒度と含油分が吸着材としての
性能を大きく支配する。吸着材の粒度を小さくすれば油
の吸着能力は増加するが、処理効率はフィルターの目詰
まりなどの障害により著しく低下し、逆に粒度を大きく
すれば処理効率は増大するが処理材量当たりの油吸着量
は減少し経済的でない。In the oil adsorbent made of the agricultural material used in the present invention, the adsorption of oil and water must be efficiently carried out. Therefore, the particle size and the oil content of the agricultural material largely control the performance of the adsorbent. If the particle size of the adsorbent is reduced, the oil adsorption capacity will increase, but the treatment efficiency will decrease significantly due to obstacles such as filter clogging. Conversely, if the particle size is increased, the treatment efficiency will increase, but The amount of oil adsorbed is reduced, which is not economical.
【0012】吸着材の粒度は原料となる農産物により異
なり、一概に限定はできないが種々検討の結果、2メッ
シュ前後の粒径の物が好ましく、この程度の粒径にする
と油の吸着処理効率が著しく向上することが判明した。
このように処理効率を勘案することによって油と水の混
合液体から油を選択的に吸着し、更に吸着材自体がその
後の処理において速やかな生分解性を示すことを見いだ
して生分解性油吸着材を完成した。[0012] The particle size of the adsorbent varies depending on the agricultural product used as the raw material and cannot be unconditionally limited. However, as a result of various investigations, a particle size of about 2 mesh is preferable. It turned out to be remarkably improved.
By taking into consideration the treatment efficiency in this way, it was found that the oil is selectively adsorbed from the mixed liquid of oil and water, and that the adsorbent itself shows rapid biodegradability in the subsequent treatment, and thus biodegradable oil adsorption The material is completed.
【0013】農産物材料は、含油農産物材料と非含油農
産物材料を通常それぞれ別個に、また大豆粕は大豆粕の
みのように単独の材料で通常使用されるが、これらはそ
れぞれ別個に使用する必要はなく、必要に応じて大豆粕
と菜種粕の組合せとか大豆粕とモミガラの組合せのよう
に含油農産物材料と非含油農産物材料との組合せなど種
々の材料を併せて使用することができる。Agricultural material is usually used as oil-containing agricultural material and non-oil-containing agricultural material separately, and soybean meal is usually used as a single material such as soybean meal only, but it is not necessary to use them separately. Alternatively, various materials such as a combination of soybean meal and rapeseed meal or a combination of oil-containing agricultural product material and non-oil-containing agricultural product material such as a combination of soybean meal and chaff can be used as needed.
【0014】農産物材料は、含油農産物からの材料のよ
うに搾油工程で加圧され板状態または塊状態で得られる
ものは、その後適当な大きさに破砕し、必要に応じて乾
燥または表面酸化処理等生分解性を助長するための処理
などを施して使用する。非含油農産物材料のように、前
記のような形態で得られないものでそのまま粉砕または
破砕して適当な大きさの粒度のものが得られない材料に
ついては、適当な大きさに成形してそのまままたは破砕
して使用するとよい。農産物材料の含油量は、適度の撥
水性と吸油能力が得られれば良いことから、基材として
の農産物材料によって異なるが、1重量%以上で、通常
10重量%以下程度であるが、吸油能力があればこれ以上
の含油量であっても良いことは勿論である。Agricultural products materials, such as materials from oil-containing agricultural products, which are obtained in a plate state or a lump state by being pressed in an oil extraction step, are then crushed to an appropriate size and, if necessary, dried or surface-oxidized. It is used after being treated to promote isobiodegradability. For materials such as non-oil-containing agricultural products that cannot be obtained in the above-mentioned form and cannot be crushed or crushed as they are to obtain particles of an appropriate size, they must be molded into an appropriate size and used as they are. Alternatively, it may be crushed before use. The oil content of the agricultural material varies depending on the agricultural material used as the base material, as long as it has an adequate water repellency and oil absorption capacity, it is usually 1% by weight or more,
It is about 10% by weight or less, but it is needless to say that the oil content may be more than this if it has an oil absorption capacity.
【0015】[0015]
【実施例】以下、実施例により本発明を詳細に説明する
が、本発明はこれらの実施例に限定されるものではな
い。EXAMPLES The present invention is described in detail below with reference to examples, but the present invention is not limited to these examples.
【0016】実施例 表1(A)「含油農産物残渣」および表1(B)「油を
後添加した非含油農産物残渣」に示す油分に調整した農
産物残渣を粒度2メッシュに粉砕して本発明油吸着材を
得た。この粉砕物(油吸着材)50グラムを金網に包み、
これを数個作製した。なお、(B)非含油農産物残渣に
ついては、粉砕後、所定量の大豆油を添加、混合し均一
に含油させた。Examples [0016] The present invention was prepared by crushing the agricultural product residue adjusted to the oil content shown in Table 1 (A) "oil-containing agricultural product residue" and Table 1 (B) "non-oil-containing agricultural product residue with post-addition of oil" to a particle size of 2 mesh. An oil adsorbent was obtained. Wrap 50 g of this crushed product (oil adsorbent) in a wire mesh,
Several of these were produced. The non-oil-containing agricultural product residue (B) was pulverized and then added with a predetermined amount of soybean oil and mixed to uniformly impregnate the soybean oil.
【0017】 [0017]
【0018】 [0018]
【0019】比較例 表1(C)に示すように、油を含まない農産物残渣とし
てナタネ粕およびモミガラをエチルエーテルで常法によ
り油分を完全に抽出し、乾燥機により溶剤を揮散させた
材料を用い、この脱油処理済みのナタネ粕およびモミガ
ラを粒度2メッシュに粉砕して油吸着材とした。この粉
砕物50グラムを金網に包み、これを数個作成した。Comparative Example As shown in Table 1 (C), oil-free agricultural product residues such as rapeseed meal and chaff were thoroughly extracted with ethyl ether by a conventional method, and the solvent was evaporated with a drier. The rapeseed meal and chaff that had been subjected to the deoiling treatment were pulverized to a grain size of 2 mesh to obtain an oil adsorbent. Fifty grams of this crushed material was wrapped in a wire mesh to make several pieces.
【0020】 [0020]
【0021】試験例1 実施例および比較例によって得た各々の粉砕物(油吸着
材)の全体を、マシン油および大豆サラダ油にそれぞれ
水が50容量%混合された液体(20〜25℃)の中に5分間
浸漬した後、混合液から出し、減圧乾燥機で水分のみを
除去した後、油吸着材以外の周囲に付着している油を完
全に除いた後、計量し、試験前の粉砕物重量で吸着した
油分を割った値を吸油率〔%〕とした。Test Example 1 The whole of each pulverized product (oil adsorbent) obtained in Examples and Comparative Examples was used as a liquid (20 to 25 ° C.) prepared by mixing 50% by volume of water with machine oil and soybean salad oil. After immersing in water for 5 minutes, remove from the mixed solution, remove only water with a vacuum dryer, completely remove oil adhering to the surrounding area except for the oil adsorbent, weigh and grind before test The value obtained by dividing the oil content adsorbed by the material weight was taken as the oil absorption rate [%].
【0022】試験例2 実施例および比較例によって得た各々の粉砕物(油吸着
材)を濾紙を敷いたロートに50グラム秤り取り、その上
からマシン油および大豆サラダ油にそれぞれ水が50容量
%混合された液体を 500ml注ぎ、濾液の油分の割合を測
定し、この値から油吸着率〔%〕を求めた。Test Example 2 50 g of each pulverized product (oil adsorbent) obtained in Examples and Comparative Examples was weighed on a funnel lined with filter paper, and 50 volumes of water was added to machine oil and soybean salad oil, respectively. % Of the mixed liquid was poured, the ratio of the oil content of the filtrate was measured, and the oil adsorption rate [%] was determined from this value.
【0023】実施例1で得られた結果は表2(A)およ
び(B)に示す通り、吸油率および油吸着率に著しい改
善が見られる。 The results obtained in Example 1 show that the oil absorption rate and the oil adsorption rate are remarkably improved as shown in Tables 2 (A) and 2 (B).
【0024】 [0024]
【0025】比較例で得られた油吸着材の結果は表2
(C)に示す通り、吸油率と油吸着率とに著しい改善が
見られなかった。 The results of the oil adsorbents obtained in the comparative examples are shown in Table 2.
As shown in (C), the oil absorption rate and the oil adsorption rate were not significantly improved.
【0026】上記の実施例および比較例で得られた油吸
着材は、いづれも基材が農産物残渣であるため、吸着材
としての使用後は堆肥の製造法と同様に積み重ねておく
ことによって容易に生分解させることができた。In each of the oil adsorbents obtained in the above Examples and Comparative Examples, the base material is an agricultural product residue, so after use as an adsorbent, it is easy to stack them in the same manner as in the method of producing compost. Could be biodegraded into
【0027】[0027]
【発明の効果】以上説明したように、生分解性油吸着材
を製造するに際して、適度の油分を含有する一定粒度以
上の農産物材料またはそれらの粉砕物を使用することに
より、撥水性を有し、油のみを効率的に吸着する生分解
性に優れた油吸着材を得ることができる。使用後の油吸
着材は容易に生分解し、肥料等として自然界に還元でき
る。なお、本発明は農産物を主体に説明したが、食料、
飼料、肥料等の用途に不適当な植物体であっても同様に
適用できることは勿論である。Industrial Applicability As described above, when a biodegradable oil adsorbent is produced, it is possible to obtain water repellency by using an agricultural product material containing an appropriate amount of oil and having a certain particle size or more, or a pulverized product thereof. Thus, an oil adsorbent having excellent biodegradability that efficiently adsorbs only oil can be obtained. The used oil adsorbent is easily biodegradable and can be returned to nature as fertilizer. Although the present invention has been described mainly for agricultural products, food,
Needless to say, the same applies to plants that are unsuitable for use as feed, fertilizer and the like.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 修武 神奈川県横浜市港南区下永谷3丁目4番20 −210号 (72)発明者 田中 進 神奈川県横浜市戸塚区東俣野町971番地1 号 グリーンアベニュー K・Y101号 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shutake Suzuki 3-4-2-20-Shimonagaya, Konan-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Susumu Tanaka 971, Higashimatano-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Green Avenue K / Y 101
Claims (3)
の農産物材料からなる生分解性油吸着材。1. A biodegradable oil adsorbent comprising an agricultural product material such as an agricultural product residue containing 1% by weight or more of an oil component.
タネ、ヤシ、綿実、ゴマ、ヒマワリ、紅花よりなる群か
ら選択してなる食用植物の残渣であることを特徴とする
請求項1記載の生分解性油吸着材。2. The raw material according to claim 1, wherein the agricultural product material is a residue of an edible plant selected from the group consisting of corn, soybean, rapeseed, palm, cottonseed, sesame, sunflower and safflower. Degradable oil adsorbent.
物残渣または非油脂原料農産物残渣に油を添加せしめた
ものであることを特徴とする請求項1記載の生分解性油
吸着材。3. The biodegradable oil adsorbent according to claim 1, wherein the agricultural product material containing an oil component is obtained by adding oil to an oil / fat raw material agricultural product residue or a non-oil / fat raw material agricultural product residue.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22950093A JPH0760115A (en) | 1993-08-23 | 1993-08-23 | Biodegradable oil adsorbent |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22950093A JPH0760115A (en) | 1993-08-23 | 1993-08-23 | Biodegradable oil adsorbent |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0760115A true JPH0760115A (en) | 1995-03-07 |
Family
ID=16893151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22950093A Pending JPH0760115A (en) | 1993-08-23 | 1993-08-23 | Biodegradable oil adsorbent |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0760115A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002102505A3 (en) * | 2001-06-15 | 2004-02-12 | Grain Processing Corp | Biodegradable sorbents |
CN104383899A (en) * | 2014-11-25 | 2015-03-04 | 苏州贝多环保技术有限公司 | Hydrophilic oil absorption cotton |
-
1993
- 1993-08-23 JP JP22950093A patent/JPH0760115A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002102505A3 (en) * | 2001-06-15 | 2004-02-12 | Grain Processing Corp | Biodegradable sorbents |
US7294343B2 (en) | 2001-06-15 | 2007-11-13 | Grain Processing Corporation | Biodegradable sorbents |
CN104383899A (en) * | 2014-11-25 | 2015-03-04 | 苏州贝多环保技术有限公司 | Hydrophilic oil absorption cotton |
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