JP4069189B2 - Water treatment material - Google Patents
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- JP4069189B2 JP4069189B2 JP22058997A JP22058997A JP4069189B2 JP 4069189 B2 JP4069189 B2 JP 4069189B2 JP 22058997 A JP22058997 A JP 22058997A JP 22058997 A JP22058997 A JP 22058997A JP 4069189 B2 JP4069189 B2 JP 4069189B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Description
【０００１】
【産業上の利用分野】
本発明は廃水等の生物化学処理に用いる固定床や流動床には極めて好適な水処理用素材に関する。
【０００２】
【従来技術】
生活廃水を始め産業用廃水の廃水処理手段としては極めて多種に亘る処理手段が採用されているが、廃水処理の管理面が容易なうえ廃水コストも安価なこと等より、生物化学的処理が最も望ましい廃水処理とされている。
しかしながら排出される生活廃水や産業廃水の水質、所謂そのＢＯＤ値やＣＯＤ値等は常時変動するものであって、この水質変動が大きくなると生物化学処理では即時に対処できぬ問題を抱えている。
これがため現状の生物化学処理においても、かかる水質変動に対処するうえから生物膜を多量に形成せしめて生物化学処理能力を向上させるため、各種の合成繊維素材を用いてモール状構造やハニカム織物構造等の所謂固定床に生物膜を付着形成させたり、或いは生物膜が付着形成しえる基材を処理廃水中に流動混在させる所謂流動床を用いたりしている。
【０００３】
しかしながら、合成繊維素材は強靱で耐水性や耐薬品性に優れ且柔軟で滑性も高いことから固定床等の加工には最適な素材であるものの、本質的に疎水性素材であるため生物膜の付着形成がなされにくく、従って生物化学処理作用が有効に発揮されるまでには長時間を要する難点がある。
これがため、近年においては生物膜の付着性に優れる無機質粉体としてタルクやカオリナイト或いは雲母等を配合してなる合成繊維素材を用いた固定床の使用が試みられてなるものの、かかる無機質粉材は合成樹脂素材との分散性が極めて悪く、従って実質的な配合もせいぜい２乃至３％程度に制限されるため、生物膜を積極的に付着形成しえる固定床の実現までには至っていない。
【０００４】
更にかかる合成繊維素材で仮令流動床を作成した場合においても、生物膜の付着形成がなされにくいばかりかポリエチレンやポリプロピレン樹脂素材を用いた場合には低比重なため形成された流動床が廃水中で浮揚し十分な混合接触流動がなされず、且ポリエステルやポリ塩化ビニル樹脂素材で形成された場合には廃水中で沈降するため、十分に撹拌流動させねばならぬ等の問題を内在している。
【０００５】
【発明が解決しようとする課題】
本発明はかかる実情に鑑みなされたものであって、本発明は生物膜の付着形成が良好で且多様な固定床の作成にも容易に加工形成しえ、而も流動床としても好適な水処理用素材を提供することにある。
【０００６】
【課題を解決するための手段】
上述の課題を解決するために本発明が採用した技術的手段は、その塩基置換容量（ｍｅｑ／１００ｇ）が少なくとも１００以上で且微孔表面積が６．０ｍ ２ ／ｇ以上のゼオライトを、その最大粒径が１０μｍ以下に破砕しその微孔内の含有水分や付着揮散分を蒸散若しくは揮散させ除去し且粘土質分を硬化させて強硬な粉材となすうえから２００乃至３５０℃の温度範囲で仮焼してゼオライト粉材となしたるうえ、該ゼオライト粉材をポリエチレン若しくはポリプロピレン樹脂に対して３乃至１５％重量割合で配合し、且このゼオライト粉材を均質に分散混合させるため流動パラフィンが１乃至３％重量割合及びその融点が４０乃至８０℃の低分子量ポリエチレン若しくはポリプロピレンが２乃至６％重量割合からなる分散材を配合のうえ撹拌混合させてゼオライト粉材が均質に分散混合された配合原料を作成し、而して該配合原料を熔融押出成形により所要の繊度で且その比重が１．００乃至１．１５の繊維状に成形し、若しくは熔融押出成形により所要の分径に成形のうえ所要の長さに切断してなる水処理用素材に存する。
【０００７】
【作 用】
本発明はかかる如き技術的手段を用いてなるため、以下のような作用を有する。即ち塩基置換容量（ｍｅｑ／１００ｇ）が少なくとも１００以上で且微孔表面積が６．０ｍ ２ ／ｇ以上のゼオライトを、その最大粒径が１０μｍ以下に破砕したうえ２００乃至３５０℃の温度で仮焼するため、微孔内の水分や付着揮発分が除去されるとともに、粘土質の硬化に伴い強硬なゼオライト粉材となる。そしてかかるゼオライト粉材がポリエチレン若しくはポリプロピレン樹脂に対して３乃至１５％重量割合で配合されるとともに、流動パラフィンが１乃至３％重量割合及びその融点が４０乃至８０℃の低分子量ポリエチレン若しくはポリプロピレンが２乃至６％重量割合からなる分散材が配合されたうえ撹拌されて分散混合がなされるため、相互の撹拌に伴って流動パラフィンが無機質のゼオライト粉材はもとより、その相溶性によりポリエチレン若しくはポリプロピレン樹脂並びに低分子量ポリエチレン若しくはポリプロピレンの外表面に包着されることとなり、特に多孔質で且その粒形が複雑多形状のゼオライト粉材は、全体的に球形化され而もその見掛比重も小さくなるため一段と分散性が高められる。
【０００８】
そして更に撹拌に伴う発熱により、低分子量ポリエチレン若しくはポリブロピレンが熔融しその融着性によりゼオライト粉材とポリエチレン若しくはポリプロピレン樹脂とが融着され且撹拌に伴う分離が交互に繰返えされて、ゼオライト粉材が均質に分散混合された配合原料が作成される。
かくしてなる配合原料を用いて熔融押出成形により紡糸、延伸が施されて所要の繊度の繊維状物となし、或いは熔融押出成形により所要分径の線条として吐出させ且所要の長さに切断することにより本発明水処理用素材が形成されるものであるから、該配合原料は熔融押出成形に際して更に熔融混練されるため、ゼオライト粉材が多量に配合されても均質に分散混合された製品が得られる。
【０００９】
【実施例】
以下に本発明の実施例を詳細に説明すれば、本発明に使用する樹脂素材としては強靱性や耐水性、耐薬品性はもとより安価で成形加工性に優れること、及び固定床並びに流動床としての使用途からは可成り水の比重に近似した比重に調整する必要上から、ポリエチレンやポリプロピレン樹脂が選択される。
【００１０】
他方生物膜を付着形成させるための付着機能を保持させる素材としてゼオライトが選択されるもので、かかる選択理由はゼオライトが比較的安価のうえ、塩基置換容量や微孔表面積が大きいことによる。
しかしながらゼオライト自体は脆弱なうえ、その微孔内には多量の含水や揮発分等が付着しており、かかる状態のままでは成形加工に供し得ず、而も成形加工による製品にゼオライトの特性を有効に発揮させるためには、予めその塩基置換容量や微孔表面積の大きなものを微粒な粉材となし且高い配合割合を以って均質に分散混合させることが要請される。
【００１１】
これがため、本発明においてはその塩基置換容量（ｍｅｑ／１００ｇ）が少なくとも１００以上で且微孔表面積が６．０ｍ ２ ／ｇ以上のゼオライトを用い、これをその最大粒径が１０μｍ以下の微粒状に破砕したうえ、その塩基置換性を阻害することなく含有水分や付着揮発分の除去、及びゼオライトの組成成分中の粘土質成分を硬化させて強硬なゼオライトとなすため、２００乃至３５０℃の温度で仮焼してなるゼオライト粉材が使用される。
【００１２】
かくしてなるゼオライト粉材は、成形される製品にゼオライトの特性を有効に発揮させるうえから、ポリエチレン若しくはポリプロピレン樹脂に対し少なくとも３％重量割合以上望ましくは５乃至１５％重量割合で配合される。
然るにゼオライト粉材は無機質なうえ、多孔質で且その粒形も複雑多形状を呈するものであり、而も比重差も大きなためポリエチレンやポリプロピレン樹脂との分散性も極めて悪く、かかる状態の原料を用いて本発明品の成形をなしても、分散不良に伴う成形不能や仮令成形がなされても製品に分散斑や色斑或いは傷の発生が頻発したり、或いはゼオライトの特性も有効に発揮しえない。
【００１３】
そこで本発明においてはかかる問題に対処するため格段の技術的配慮が用いられてなるもので、ゼオライト粉材の如き無機質はもとよりその保持する相溶性によりポリエチレンやポリプロピレン樹脂と付着しえる流動パラフィンを１乃至３％重量割合、及びその融点が４０乃至８０℃の低分子量ポリエチレン若しくはポリプロピレンが２乃至６％重量割合からなる分散材が配合されたうえ、撹拌させて分散混合を図ることで、その解決を図っている。
即ちポリエチレンやポリプロピレン樹脂に対して３乃至１５％重量割合でゼオライト粉材が配合されたうえ、流動パラフィンが１乃至３％重量割合及びその融点が４０乃至８０℃の低分子量ポリエチレン若しくはポリプロピレンが２乃至６％重量割合で配合されて攪拌されることにより、流動パラフィンが無機質のゼオライト粉材はもとより、ポリエチレン若しくはポリプロピレン樹脂並びに低分子量ポリエチレン若しくはポリプロピレンの外表面を包着するよう付着され、特にゼオライト粉材においては該流動パラフィンの包着により多孔質で且複雑多形状の粒形が球形化して滑性を保持し、而も見掛比重が一段と低下するため、ポリエチレンやポリプロピレン樹脂との分散性が高まることとなる。
【００１４】
更に引続いての撹拌に伴う撹拌発熱によって低分子量ポリエチレン若しくはポリプロピレンが熔融する結果、その融着性によりポリエチレン若しくはポリプロピレン樹脂とゼオライト粉材とが融着され、且撹拌によるせん断力で分離されることが繰返えされてゼオライト粉材が均質に分散混合された配合原料が作成される。
かかる場合において攪拌の具体的方法には特段の制限はなく、一般的にはリボンブレンダーやヘンシェルミキサー等の撹拌混合機が用いられるものであって、ヘンシェルミキサーの如く高速で撹拌混合がなしえるものでは撹拌に伴う発熱により低分子量ポリエチレンやポリプロピレンの熔融がなされるが、リボンブレンダーの如く低速での撹拌混合がなされるものでは、撹拌混合機を４０乃至８０℃に加温できるよう配慮することが望まれる。
撹拌混合に要する時間は撹拌速度によっても異るが、３００乃至７００回転／分の撹拌速度の場合では略１５乃至３０分が目安となる。
【００１５】
而して本発明水処理用素材をモール状や紐状或いはハニカム織物やラッセル編物等の繊維加工を施して固定床として用いられる場合には長繊維として、更に流動床として用いられる場合には所要の分径と長さに切断されたチップ状のものが使用される。従って長繊維の成形には、通常の熔融押出成形法で容易に形成しえるもので、該配合原料を熔融押出成形機を用いて所要口径が多数穿孔されたノズルより熔融吐出させたうえ、略５乃至１０倍の延伸を施すことにより、所要の繊度でゼオライト粉材が均質に分散混合され且その比重が略１．００乃至１．１５の長繊維状の本発明が形成される。
【００１６】
更に配合原料を熔融押出成形機を用いて所要口径のノズルより線条に熔融吐出させたうえ所要の長さに切断して水冷し、若しくは切断した後空気とともにパイプで移送させつつ空冷し、或いはノズルを水中に設けて吐出且切断させることにより、所要の分径と長さで且ゼオライト粉材が均質に分散混合され而もその比重が略１．００乃至１．１５のチップ状の本発明が形成されることとなる。
【００１７】
【発明の効果】
本発明は上述の如き構成からなるもので、生物膜付着形成のための素材として塩基置換容量（ｍｅｑ／１００ｇ）が少なくとも１００以上で且微孔表面積が６．０ｍ ２ ／ｇ以上のゼオライトが選択され、而もこのゼオライトを最大粒径１０μｍ以下に破砕のうえ２００乃至３５０℃で仮焼したゼオライト粉材が用いられるため、含有水分や揮発分が除去されて成形時のガス発生が無く、且粉材自体も強硬となるため配合撹拌時や熔融混練時にも崩壊がなく、成形が良好になしえる。そしてかかるゼオライト粉材がポリエチレン若しくはポリプロピレン樹脂に対して３乃至１５％重量割合で配合されるとともに、流動パラフィンが１乃至３％重量割合及びその融点が４０乃至８０℃の低分子量ポリエチレン若しくはポリプロピレンが２乃至６％重量割合で配合されたうえ、撹拌されて分散混合が図られるものであるから、流動パラフィンがゼオライト粉材やポリエチレン若しくはポリプロピレン樹脂或いは低分子量ポリエチレン若しくはポリプロピレンの外表面に包着し、無機質で多孔なうえその粒形が複雑多形状のゼオライト粉材各個が球形化されるとともに滑性も付与され、而もその見掛比重も略４０乃至７０％程度低下するため分散性が著るしく高まる。更に撹拌に伴う発熱により、低分子量ポリエチレン若しくはポリプロピレンの熔融によりゼオライト粉材とポリエチレン若しくはポリプロピレン樹脂との融着と分離が繰返されて、相互が均質に分散混合された配合原料が形成される。そしてこの配合原料を使用して熔融押出成形により長繊維状若しくはチップ状の本発明が形成されるものであるから、ゼオライト粉材がポリエチレンやポリプロピレン樹脂と再び熔融混練されて成形されるため、ゼオライト粉材の微細な粒径とも相俟って細繊度で且均質に分散混合された長繊維状物が形成しえるため、これにより作成された固定床は高い配合割合で而も均質に分散混合されたゼオライト粉材と廃水との接触面が著るしく増大し、生物膜の付着形成が短時に且多量になされるため、生物化学処理能力が高まり効率良く廃水処理がなしえることとなる。加えてチップ状に形成された場合には、その比重が略１．００乃至１．１５程度であるため廃水中に良好に分散流動させることができ、且ゼオライト粉材の高い配合割合と均質な分散混合とも相俟って生物膜の付着形成が強固になされるため、生物化学処理効果が著るしく高まる等、多くの特長を具備する水処理用素材である。[0001]
[Industrial application fields]
The present invention relates to a water treatment material that is extremely suitable for a fixed bed or a fluidized bed used for biochemical treatment of waste water or the like.
[0002]
[Prior art]
As wastewater treatment means for domestic wastewater and industrial wastewater, a wide variety of treatment means are adopted, but biochemical treatment is the most popular because wastewater treatment is easy and the cost of wastewater is low. Desirable wastewater treatment.
However, the quality of the discharged domestic wastewater and industrial wastewater, the so-called BOD value and COD value, etc. constantly fluctuate. If this water quality fluctuation becomes large, biochemical treatment has a problem that cannot be dealt with immediately.
For this reason, even in the current biochemical treatment, in order to cope with such water quality fluctuations, a large number of biofilms are formed to improve the biochemical treatment capacity. A so-called fluidized bed is used, in which a biofilm is attached to and formed on a so-called fixed bed, or a base material on which a biofilm can be attached and formed is fluidized and mixed in the treatment wastewater.
[0003]
However, synthetic fiber materials are tough, excellent in water resistance and chemical resistance, flexible and highly slippery. Therefore, it takes a long time before the biochemical treatment action is effectively exhibited.
For this reason, in recent years, the use of a fixed bed using a synthetic fiber material in which talc, kaolinite, mica, or the like is blended as an inorganic powder excellent in biofilm adhesion has been attempted. Is extremely poor in dispersibility with the synthetic resin material, and therefore, the substantial blending is limited to about 2 to 3% at the most, so that a fixed bed capable of positively forming a biofilm has not been realized.
[0004]
Furthermore, even when a temporary fluidized bed is created with such synthetic fiber material, the formation of the fluidized bed is not only difficult to form on the biofilm, but when the polyethylene or polypropylene resin material is used, the fluidized bed formed in the wastewater is low. When it floats and does not have sufficient mixed contact flow, and is formed of polyester or polyvinyl chloride resin material, it settles in waste water, and therefore it has a problem that it must be sufficiently stirred and flowed.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of such circumstances, and the present invention has a good biofilm adhesion formation, can be easily processed to form various fixed beds, and is suitable as a fluid bed. It is to provide processing materials.
[0006]
[Means for Solving the Problems]
The technical means adopted by the present invention in order to solve the above-mentioned problem is to use a zeolite having a base substitution capacity (meq / 100 g) of at least 100 and a micropore surface area of 6.0 m 2 / g or more. In a temperature range of 200 to 350 ° C., after the particle size is crushed to 10 μm or less, the water content and adhering volatilized content in the micropores are removed by evaporation or volatilization, and the clay is cured to form a hard powder material. In addition to calcining into a zeolite powder material, the zeolite powder material is blended in a 3 to 15% weight ratio with respect to polyethylene or polypropylene resin, and liquid paraffin is added to uniformly disperse and mix the zeolite powder material. A dispersing agent comprising 1 to 3% by weight of a low molecular weight polyethylene or polypropylene having a melting point of 40 to 80 ° C. and 2 to 6% by weight is mixed and stirred. A blended raw material in which the zeolite powder is homogeneously dispersed and mixed by stirring is prepared, and the blended raw material is melt-extruded into a fiber having a required fineness and a specific gravity of 1.00 to 1.15 . It exists in the raw material for water treatment by shape | molding or shape | molding to a required part diameter by melt extrusion molding, and cut | disconnecting to the required length.
[0007]
[Operation]
Since the present invention uses such technical means, it has the following effects. That is, a zeolite having a base substitution capacity (meq / 100 g) of at least 100 or more and a micropore surface area of 6.0 m 2 / g or more was crushed to a maximum particle size of 10 μm or less and calcined at a temperature of 200 to 350 ° C. Therefore, moisture and adhering volatile components in the micropores are removed, and a hard zeolite powder material is obtained as the clay is cured. And this zeolite powder material is blended in 3 to 15% by weight with respect to polyethylene or polypropylene resin, 1 to 3% by weight of liquid paraffin, and 2 low molecular weight polyethylene or polypropylene having a melting point of 40 to 80 ° C. Since a dispersion material consisting of up to 6% by weight is mixed and agitated to disperse and mix, the liquid paraffin is not only an inorganic zeolite powder material with mutual agitation, but also has compatibility with polyethylene or polypropylene resin and Because it is encapsulated on the outer surface of low molecular weight polyethylene or polypropylene, especially the porous and complex-shaped zeolite powder material is spheroidized as a whole, and its apparent specific gravity is reduced. Dispersibility is further improved.
[0008]
Further, due to the heat generated by the stirring, the low molecular weight polyethylene or polypropylene is melted, and due to its fusing property, the zeolite powder material and the polyethylene or polypropylene resin are fused, and the separation accompanying the stirring is repeated alternately, A blended raw material in which the materials are uniformly dispersed and mixed is created.
The blended raw material thus formed is spun and stretched by melt extrusion to form a fibrous material having a required fineness, or is discharged as a filament having a required diameter by melt extrusion and cut to a required length. Since the material for water treatment of the present invention is thus formed, the blended raw material is further melt-kneaded at the time of melt extrusion, so that even if a large amount of zeolite powder is blended, a product that is homogeneously dispersed and mixed is obtained. can get.
[0009]
【Example】
Examples of the present invention will be described in detail below. The resin material used in the present invention is not only toughness, water resistance and chemical resistance, but also inexpensive and excellent in moldability, and as a fixed bed and fluidized bed. From the necessity of use, polyethylene or polypropylene resin is selected because it is necessary to adjust the specific gravity to be close to the specific gravity of water.
[0010]
On the other hand, zeolite is selected as a material that retains an adhesion function for depositing a biofilm. The reason for this selection is that the zeolite is relatively inexpensive and has a large base substitution capacity and a large pore surface area.
However, the zeolite itself is fragile, and a large amount of water content and volatile matter adheres in the micropores, so it cannot be used for molding in such a state. In order to exhibit it effectively, it is required that a material having a large base substitution capacity and a fine pore surface area is formed in advance as a fine powder material and uniformly dispersed and mixed with a high blending ratio.
[0011]
Therefore, in the present invention, a zeolite having a base substitution capacity (meq / 100 g) of at least 100 or more and a microporous surface area of 6.0 m 2 / g or more is used, which is finely divided with a maximum particle size of 10 μm or less. 200 to 350 ° C. at a temperature of 200 ° C. to 350 ° C. in order to remove the contained moisture and adhering volatiles and to harden the clay component in the composition component of the zeolite without disturbing the base substitution property. Zeolite powder material calcined at is used.
[0012]
The zeolite powder material thus formed is blended at least 3% by weight or more, preferably 5 to 15% by weight with respect to polyethylene or polypropylene resin, in order to effectively exhibit the properties of the zeolite in the molded product.
However, the zeolite powder is inorganic, porous, and has a complex and multi-grain shape, and because of its large specific gravity difference, the dispersibility with polyethylene and polypropylene resin is extremely poor, and the raw material in such a state is used. Even if the product of the present invention is molded, even if molding is impossible or provisional molding due to poor dispersion, the product frequently exhibits dispersion spots, color spots, or scratches, or exhibits the characteristics of zeolite effectively. No.
[0013]
Therefore, in the present invention, special technical considerations are used in order to cope with such a problem. In addition to inorganic materials such as zeolite powders, liquid paraffin that can adhere to polyethylene or polypropylene resin is not only used due to its compatibility. A dispersion material composed of 2 to 6% by weight of a low molecular weight polyethylene or polypropylene having a melting point of 40 to 80 ° C. and a melting point of 40 to 80 ° C. is blended, and the mixture is stirred and dispersed and mixed. I am trying.
That is, a zeolite powder material is blended at 3 to 15% by weight with respect to polyethylene or polypropylene resin, and 1 to 3% by weight of liquid paraffin and 2 to 2 of low molecular weight polyethylene or polypropylene having a melting point of 40 to 80 ° C. By mixing and stirring at a 6% weight ratio, the liquid paraffin is attached so as to enclose the outer surface of polyethylene or polypropylene resin and low molecular weight polyethylene or polypropylene as well as inorganic zeolite powder, especially zeolite powder. In this case, the inclusion of the liquid paraffin makes the porous, complex and multi-shaped particles spheroidized to maintain lubricity, and the apparent specific gravity is further reduced, so that the dispersibility with polyethylene and polypropylene resin is increased. It will be.
[0014]
Furthermore, the low molecular weight polyethylene or polypropylene is melted by the stirring heat generated by the subsequent stirring, and as a result, the polyethylene or polypropylene resin and the zeolite powder are fused by the fusing property and separated by the shearing force by stirring. Is repeated to prepare a blended raw material in which the zeolite powder material is uniformly dispersed and mixed.
In such a case, there is no particular limitation on the specific method of stirring, and generally a stirring mixer such as a ribbon blender or a Henschel mixer is used, and stirring and mixing can be performed at a high speed like a Henschel mixer. Then, low molecular weight polyethylene and polypropylene are melted by heat generated by stirring, but in the case of stirring mixing at a low speed such as a ribbon blender, consideration should be given so that the stirring mixer can be heated to 40 to 80 ° C. desired.
The time required for stirring and mixing varies depending on the stirring speed, but in the case of a stirring speed of 300 to 700 revolutions / minute, approximately 15 to 30 minutes is a standard.
[0015]
Thus, when the water treatment material of the present invention is used as a fixed bed after being subjected to fiber processing such as molding, string, honeycomb woven fabric or raschel knitted fabric, it is required when used as a long bed and further as a fluidized bed. The chip-shaped thing cut | disconnected by the part diameter and length of this is used. Therefore, the long fiber can be easily formed by a usual melt extrusion molding method, and the blended raw material is melted and discharged from a nozzle having a large number of required diameters using a melt extrusion molding machine. By stretching 5 to 10 times, the zeolite powder material is uniformly dispersed and mixed with a required fineness, and a long fiber-like present invention having a specific gravity of approximately 1.00 to 1.15 is formed.
[0016]
Further, the blended raw material is melted and discharged from a nozzle having a required diameter to a filament using a melt extrusion molding machine, cut to a required length and water-cooled, or air-cooled while being transferred by a pipe together with air, or By providing a nozzle in the water and discharging and cutting, the zeolite powder material is uniformly dispersed and mixed with the required size and length, and the specific gravity is approximately 1.00 to 1.15. Will be formed.
[0017]
【The invention's effect】
The present invention is constituted as described above, and a zeolite having a base substitution capacity (meq / 100 g) of at least 100 or more and a micropore surface area of 6.0 m 2 / g or more is selected as a material for biofilm adhesion formation. In addition, since the zeolite powder material obtained by crushing the zeolite to a maximum particle size of 10 μm or less and calcining at 200 to 350 ° C. is used, moisture and volatile components are removed, and no gas is generated during molding. Since the powder material itself is also hard, there is no collapse even during mixing and melt kneading, and molding can be performed well. And this zeolite powder material is blended in 3 to 15% by weight with respect to polyethylene or polypropylene resin, 1 to 3% by weight of liquid paraffin, and 2 low molecular weight polyethylene or polypropylene having a melting point of 40 to 80 ° C. Since it is blended in an amount of 6 to 6% by weight and stirred and dispersed and mixed, liquid paraffin is encapsulated on the outer surface of zeolite powder, polyethylene, polypropylene resin, low molecular weight polyethylene or polypropylene, and is inorganic. In addition, each of the zeolite powders, which are porous and have a complex and polymorphic shape, are spheroidized and provided with lubricity, and the apparent specific gravity is reduced by about 40 to 70%, so that the dispersibility is remarkable. Rise. Further, due to the heat generated by the stirring, the fusion and separation of the zeolite powder material and the polyethylene or polypropylene resin are repeated by melting the low molecular weight polyethylene or polypropylene, thereby forming a blended raw material in which the materials are uniformly dispersed and mixed. Since the blended raw material is used to form the present invention in the form of long fibers or chips by melt extrusion molding, the zeolite powder material is melt-kneaded again with polyethylene or polypropylene resin and molded. Combined with the fine particle size of the powder material, it can form a long fibrous material that is finely distributed and homogeneously dispersed and mixed, so that the fixed bed created by this can be uniformly mixed and mixed at a high blending ratio. Since the contact surface between the zeolite powder material and the wastewater is remarkably increased and the biofilm is formed in a short time and in a large amount, the biochemical treatment capacity is increased and the wastewater treatment can be efficiently performed. In addition, when formed into chips, the specific gravity is about 1.00 to 1.15 , so that it can be dispersed and flown well in the wastewater, and the zeolite powder material has a high blending ratio and homogeneity. In combination with dispersive mixing, the biofilm adhesion is strongly formed, so that the biochemical treatment effect is remarkably enhanced, and the water treatment material has many features.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22058997A JP4069189B2 (en) | 1997-07-11 | 1997-07-11 | Water treatment material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22058997A JP4069189B2 (en) | 1997-07-11 | 1997-07-11 | Water treatment material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1128492A JPH1128492A (en) | 1999-02-02 |
| JP4069189B2 true JP4069189B2 (en) | 2008-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22058997A Expired - Fee Related JP4069189B2 (en) | 1997-07-11 | 1997-07-11 | Water treatment material |
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| JP (1) | JP4069189B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4497646B2 (en) * | 2000-04-10 | 2010-07-07 | 三菱レイヨン株式会社 | Water treatment apparatus and water treatment system provided with the same |
| JP4502449B2 (en) * | 2000-04-10 | 2010-07-14 | 三菱レイヨン株式会社 | Water treatment apparatus and water treatment system provided with the same |
| JP4502450B2 (en) * | 2000-04-10 | 2010-07-14 | 三菱レイヨン株式会社 | Immersion membrane separator and water purification system equipped with the same |
| JP4502453B2 (en) * | 2000-04-20 | 2010-07-14 | 三菱レイヨン株式会社 | Water treatment apparatus and water treatment system provided with the same |
| KR20040003753A (en) * | 2002-07-04 | 2004-01-13 | 일신산업주식회사 | A septic tank including zeolite and germanium |
| JP4979946B2 (en) * | 2005-12-27 | 2012-07-18 | 栗田工業株式会社 | Method for producing biofilm-forming carrier and biofilm-forming carrier |
| CN102992487A (en) * | 2012-12-21 | 2013-03-27 | 农业部环境保护科研监测所 | Movable zeolite algal bed water quality purifier |
| JP6088455B2 (en) | 2014-03-11 | 2017-03-01 | アズビル株式会社 | Positioner |
| CN113683265A (en) * | 2021-09-03 | 2021-11-23 | 福泉环保城发展有限公司 | Method for treating ammonia nitrogen aquaculture wastewater by using porous zeolite/polyethylene particles and activated carbon in combined manner |
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1997
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| JPH1128492A (en) | 1999-02-02 |
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