JPH024358B2 - - Google Patents
Info
- Publication number
- JPH024358B2 JPH024358B2 JP60223171A JP22317185A JPH024358B2 JP H024358 B2 JPH024358 B2 JP H024358B2 JP 60223171 A JP60223171 A JP 60223171A JP 22317185 A JP22317185 A JP 22317185A JP H024358 B2 JPH024358 B2 JP H024358B2
- Authority
- JP
- Japan
- Prior art keywords
- yarn
- contact material
- water treatment
- knitted fabric
- yarns
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000011282 treatment Methods 0.000 claims description 23
- 239000004744 fabric Substances 0.000 claims description 15
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 239000012209 synthetic fiber Substances 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 6
- 238000005273 aeration Methods 0.000 description 13
- 239000010802 sludge Substances 0.000 description 10
- 239000007787 solid Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- 238000009940 knitting Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Biological Treatment Of Waste Water (AREA)
Description
（産業上の利用分野）
本発明は、汚水処理場などの曝気槽内に張設す
る水処理用接触材、および浚渫、埋め立て工事の
際の余水口での浮遊物質を捕捉するための汚濁防
止材に関するものである。
（従来の技術）
最近、活性汚泥法等の生物学的排水処理の中
で、生物膜を利用した固定床式接触酸化法が注目
されている。この固定床式接触酸化法とは、微生
物の付着しやすい接触材を曝気槽内に充填し、該
接触材の表面に着生し、それが繁殖した生物膜
に、排水を空気とともに接触させて吸着するシス
テムである。そして、この場合の接触材として、
実開昭59−27894号に、平行に配列された複数本
の鎖編糸間が、挿入糸により所定間隔ごとに連結
されて方形の空隙部が形成された角目ラツセル編
地からなる水処理用接触材が開示されている。さ
らに、最近において、接触材の表面積を大にして
微生物の着生を容易ならしめ、そして、汚泥捕捉
量を大幅に向上すべく、該挿入糸に捲縮伸長率が
５〜30％を有する合成繊維マルチフイラメント捲
縮加工糸を使用することの研究がなされている。
（発明が解決しようとする問題点）
このような水処理用接触材は、空隙部の挿入糸
が一方向に並んでいて、織物の緯糸のごときもの
がないので、水流に対する整流効果があり、その
空隙部を通過する水流には偏流が少なく、微生物
の付着も均一であり、さらに、該ネツトは槽内の
循環水流により静かに揺動するため、付着した汚
泥の剥離が恒常的に起こり、生物膜が肥厚して急
激に大量の汚泥が脱落することもないなど、多く
の利点を有するものであるが、一方、汚泥は該ネ
ツトの編地部に平面状に付着するため、汚泥捕捉
量が少ないという問題があつた。この対策とし
て、捲縮伸長率が５〜30％を有する合成繊維マル
チフイラメント捲縮加工糸を用いて空隙部を形成
する挿入糸のバルキー性を高め、汚泥捕捉量を多
くすることはできるようになつてきている。しか
し、この水処理用接触材を曝気槽内に取付ける場
合、編地を構成する多数の空隙部に挿入糸として
捲縮糸を使用していると、張設の際に張力をかけ
るとき、空隙部が大きく変形したりして寸法安定
性が悪く、隣り合う接触材と密着してしまうとい
う取扱い上の新たな問題が生じた。また、浚渫、
埋め立て工事の際に余水口に張設する汚濁防止フ
エンスは種々考えられて用いられているが、それ
らは主としてテール部に平織布が使用されてい
て、布目が密で水を通過させないために、水流の
ある河川や潮の干満の発生する場所では、張設し
たフエンスと底面の間から水流に乗つて汚泥が流
出してしまい、ほとんど効果がなく、浮遊物質
（SS）の捕捉性が悪い欠点がある。
（問題点を解決するための手段）
本発明は上記の点に鑑み、挿入糸に無捲縮糸と
捲縮伸長率が５〜30％を有する嵩高性合成繊維マ
ルチフイラメント捲縮糸を使用し、汚泥の捕捉量
が大きく、寸法安定性のよい水処理用接触材を提
供することにある。
本発明による水処理用接触材は、平行に配列さ
れた複数本の鎖編糸間が、挿入糸により所定間隔
ごとに連結されて方形の空隙部が形成された角目
ラツセル編地からなる水処理用接触材において、
挿入糸が無捲縮の糸条の層と捲縮伸長率が５〜30
％を有する合成繊維マルチフイラメント捲縮加工
糸の層との複数層で構成されていることを特徴と
するものである。
以下に、本発明の構成を図面にもとづいて詳細
に説明する。
第１図および第２図は、本発明に係る水処理用
接触材の一例を示すものであり、該水処理用接触
材１は、適時の太さに構成された複数本の鎖編糸
２がほぼ平行に配列され、かつ、それらの鎖編糸
２が挿入糸３，３′により所定間隔ごとに連結さ
れて方形の空隙（網目）部４が形成された、いわ
ゆる角目ラツセル編地で構成される。
本発明の水処理用接触材の鎖編糸２の素材とし
ては、天然繊維、合成繊維等の有機繊維、ガラス
繊維、鉱物繊維、金属繊維等の無機繊維、あるい
はそれらが混合されたフイラメント状または紡績
糸状のものを必要に応じて適宜選択して用いる
が、角目ラツセル編地における各挿入糸は無捲縮
糸３と捲縮伸長率が５〜30％を有する嵩高性合成
繊維マルチフイラメント捲縮加工糸３′を用いる。
捲縮性を有した挿入糸３′は、この場合捲縮伸長
率が５％より小さいとフイラメントの集束性が過
大となり嵩高性が低下し、また風合も立体感がな
くなるので好ましくなく、また、捲縮伸長率が30
％を越えると、集束性が低下し、取扱い性が悪
く、特に、編網時にフイラメント切れが多発し不
適であり、好ましくは捲縮伸長率が15〜25％であ
る。無捲縮糸である挿入糸３は、鎖編糸２と全く
同様の素材を使用することが可能である。本発明
の接触材は、第２図のごとく、無捲縮糸の層とマ
ルチフイラメント捲縮加工糸の層の２層又は３層
にて挿入糸が構成されている。したがつて、外観
は無捲縮糸３が現れたり、マルチフイラメント捲
縮加工糸が現れたりする。
該捲縮加工糸は、適度の数のループやタルミを
有するため、これらの毛羽効果によつて従来の網
状接触材とは全く異なる厚みのある立体性のある
ものとなる。すなわち、本発明の接触材は挿入糸
に無捲縮糸とマルチフイラメント捲縮加工糸を用
いており、該接触材は接触材表面より突出したル
ープやタルミにより嵩高性が発現し、さらに、マ
ルチフイラメント同士が交又する部分が多く、し
たがつて、汚泥が立体的に付着し捕捉量が増大す
る。さらに、無捲縮糸と複数層の構成を成してい
るので、該接触材が曝気槽内や余水口に張設され
る場合、無捲縮糸により良好な寸法安定性が得ら
れるために、接触材が伸びず密着しない。
また、各鎖編糸２間の間隔、すなわち、挿入糸
３の長さは10〜300mmで、また、各挿入糸間の間
隔が５〜70mmで、そして、それらが形成される空
隙部４の個々の面積が0.5〜200cm2であることが空
隙部４の閉塞を防ぐため必要であり、編地面積に
対する空隙すなわち投影図において光の通過する
部分の総面積の割合（空隙率）が５〜80％のもの
が好ましい。また、浚渫、埋め立て工事の際の余
水口での浮遊物質（SS）を捕捉する場合には、
特に、水流やSSの粒径とその性質により空隙率
が異なるので適宜選択する必要がある。
第３図は、本発明に係る角目ラツセル編地から
なる水処理用接触材を曝気槽内に取付ける場合の
一例を示すもので、角目ラツセル編地の鎖編糸２
の長手方向を横方向に用い、例えば、該編地の耳
部の鎖編糸を上縁として、上部および下部の空隙
部に支持棒を貫通させ、適宜の位置で結線バンド
６で固定した本接触材を曝気槽５内の架台に多数
配列させて設置する。図において７は曝気用空気
吹込管である。
次に、本発明でいう捲縮伸長率は糸条に１mg／
ｄの荷重をかけたときの長さをL1、100mg／ｄの
荷重をかけたときの長さをL2として、次式より
求める。
捲縮伸長率（％）＝L2−L1／L1×100（％）
（実施例）
次に、本発明に係る水処理用接触材を使用した
場合の具体例について説明する。
下記の仕様を持つ接触材を、第３図に示すごと
く曝気槽内に取付け、生活排水の処理を行い、約
１年間にわたり処理状況を調査した。
その結果を第１表に示す。
水処理用接触材仕様
●素材
鎖編糸：ポリエステルマルチフイラメント
1500d／140f ２本
挿入糸：ポリエステル捲縮加工糸（捲縮伸長率
20％）
1500d／140f １本
ポリエステルマルチフイラメント無捲縮糸
1500d／140f １本
●形態：角目ラツセル編地（第１図の通り）
●空隙率：45％
●空隙部面積：６cm2／個
●充填量
（1m幅×1m長）×10枚／m3−曝気槽
また、比較のため、上記挿入糸にポリエステル
タイヤコード糸（捲縮伸長率０％）を用いる以外
は上記と全く同様にして処理した結果も第１表に
示す。
処理成積は年間を通じて安定しており、処理水
BOD20mg／ｌ以下、SS20mg／Ｌ以下の満足する
結果が得られた。また、生物膜の付着状況を観察
した結果、生物膜は編地の網組識に立体的に付着
しており、空隙部の閉塞はほとんどなかつた。さ
らに、２層構造の効果として、隣り合う接触材が
密着することも認められなかつた。
(Industrial Application Field) The present invention is a contact material for water treatment installed in an aeration tank of a sewage treatment plant, etc., and a pollution prevention material for capturing suspended solids at a spillway during dredging and reclamation work. It is related to materials. (Prior Art) Recently, among biological wastewater treatments such as activated sludge methods, fixed bed catalytic oxidation methods that utilize biofilms have been attracting attention. This fixed-bed catalytic oxidation method involves filling an aeration tank with a contact material to which microorganisms can easily adhere, and bringing wastewater into contact with the biological film that has grown and grown on the surface of the contact material. It is an adsorption system. In this case, as a contact material,
Utility Model Application Publication No. 59-27894 discloses a water treatment method consisting of square lattice knitted fabric in which square voids are formed by connecting multiple chain stitch yarns arranged in parallel at predetermined intervals by inserting yarns. A contact material for use is disclosed. Furthermore, recently, in order to increase the surface area of the contact material to facilitate the attachment of microorganisms and to greatly improve the amount of sludge captured, synthetic threads with a crimp elongation rate of 5 to 30% have been developed. Research has been done into using fiber multifilament crimped yarns. (Problems to be Solved by the Invention) Such a contact material for water treatment has a rectifying effect on the water flow because the inserted threads in the void are arranged in one direction and there is no weft like the weft of a fabric. The water flow that passes through the voids has little drift, and the adhesion of microorganisms is uniform.Furthermore, because the net is gently swayed by the circulating water flow within the tank, the adhering sludge constantly peels off. This method has many advantages, such as preventing large amounts of sludge from suddenly falling off due to thickening of the biofilm, but on the other hand, since the sludge adheres to the knitted fabric of the net in a flat pattern, the amount of sludge captured is small. There was a problem that there were few. As a countermeasure to this problem, it is possible to increase the amount of sludge captured by increasing the bulkiness of the inserted yarn that forms the voids by using synthetic fiber multifilament crimped yarn with a crimp elongation rate of 5 to 30%. I'm getting used to it. However, when installing this contact material for water treatment in an aeration tank, if crimped yarn is used as the yarn inserted into the many voids that make up the knitted fabric, when tension is applied during tensioning, the voids New handling problems arose in that the dimensional stability was poor due to large deformation of the part, and the contact material came into close contact with the adjacent contact material. Also, dredging,
A variety of pollution prevention fences have been proposed and used over spillways during land reclamation work, but most of them use plain-woven fabric for the tail section, which has a dense weave that prevents water from passing through. , In rivers with flowing water or places where the tides ebb and flow, sludge flows out with the water current from between the fence installed and the bottom, making it almost ineffective and having poor ability to capture suspended solids (SS). There are drawbacks. (Means for Solving the Problems) In view of the above points, the present invention uses non-crimped yarn and bulky synthetic fiber multifilament crimped yarn having a crimp elongation rate of 5 to 30% as the insertion yarn. The object of the present invention is to provide a contact material for water treatment that can capture a large amount of sludge and has good dimensional stability. The contact material for water treatment according to the present invention is a water treatment contact material made of a square ratchet fabric in which a plurality of chain stitch yarns arranged in parallel are connected at predetermined intervals by insertion yarns to form rectangular voids. In contact materials for treatment,
The inserted yarn is a layer of uncrimped yarn and the crimp elongation rate is 5 to 30.
% of synthetic fiber multifilament crimped yarn. Below, the configuration of the present invention will be explained in detail based on the drawings. FIG. 1 and FIG. 2 show an example of a contact material for water treatment according to the present invention, and the contact material 1 for water treatment consists of a plurality of chain knitting yarns 2 having an appropriate thickness. It is a so-called square rattussel knitted fabric in which the chain stitch yarns 2 are arranged almost parallel to each other, and the chain stitch yarns 2 are connected at predetermined intervals by insertion yarns 3 and 3' to form a rectangular gap (mesh) portion 4. configured. The chain stitch yarn 2 of the contact material for water treatment of the present invention may be made of organic fibers such as natural fibers and synthetic fibers, inorganic fibers such as glass fibers, mineral fibers, and metal fibers, or a filament or a mixture thereof. Spun yarns are appropriately selected and used as required, but each inserted yarn in the square ratcelle knitted fabric is a non-crimped yarn 3 and a bulky synthetic fiber multifilament winding having a crimp elongation rate of 5 to 30%. Shrunken yarn 3' is used.
In this case, if the crimp elongation rate of the insertion yarn 3' is less than 5%, the filament will have too much convergence, resulting in a decrease in bulkiness, and the texture will lose its three-dimensional feel, which is not preferable. , crimp elongation rate is 30
If it exceeds %, the convergence will be poor, the handleability will be poor, and in particular, filament breakage will occur frequently during knitting, making it unsuitable.The crimp elongation rate is preferably 15 to 25%. The insertion yarn 3, which is a non-crimped yarn, can be made of the same material as the chain knitting yarn 2. In the contact material of the present invention, as shown in FIG. 2, the inserted yarn is composed of two or three layers: a layer of uncrimped yarn and a layer of multifilament crimped yarn. Therefore, in appearance, a non-crimped yarn 3 appears or a multifilament crimped yarn appears. Since the crimped yarn has an appropriate number of loops and sag, these fluff effects give it a thickness and three-dimensionality that are completely different from conventional mesh contact materials. That is, the contact material of the present invention uses a non-crimped yarn and a multifilament crimped yarn as the insertion yarn, and the contact material exhibits bulkiness due to the loops and sagging that protrude from the surface of the contact material. There are many parts where the filaments intersect with each other, and therefore, sludge adheres three-dimensionally and the amount of trapped material increases. Furthermore, since it has a multi-layer structure with non-crimped yarn, when the contact material is installed in an aeration tank or over a spillway, the non-crimped yarn provides good dimensional stability. , the contact material does not stretch and does not adhere tightly. In addition, the distance between each chain knitting yarn 2, that is, the length of the inserted yarn 3, is 10 to 300 mm, the distance between each inserted yarn is 5 to 70 mm, and the gap 4 in which they are formed is 10 to 300 mm. It is necessary for the individual area to be 0.5 to 200 cm 2 in order to prevent clogging of the void 4, and the ratio of the total area of the void, that is, the part through which light passes in the projected view, to the knitted fabric area (porosity) is 5 to 200 cm2. 80% is preferred. In addition, when capturing suspended solids (SS) at the spillway during dredging and reclamation work,
In particular, since the porosity varies depending on the water flow, the particle size of the SS, and its properties, it is necessary to select it appropriately. FIG. 3 shows an example of installing a water treatment contact material made of a square ratchet knitted fabric according to the present invention in an aeration tank.
Using the longitudinal direction of the knitted fabric as the transverse direction, for example, using the chain stitch yarn of the selvedge part of the knitted fabric as the upper edge, passing a support rod through the upper and lower gaps, and fixing it with a connecting band 6 at an appropriate position. A large number of contact materials are arranged and installed on a pedestal in the aeration tank 5. In the figure, 7 is an aeration air blowing pipe. Next, the crimp elongation rate in the present invention is 1mg/
The length when a load of d is applied is L1 , and the length when a load of 100 mg/d is applied is L2 , and it is determined from the following formula. Crimp elongation rate (%) = L 2 −L 1 /L 1 ×100 (%) (Example) Next, a specific example in which the contact material for water treatment according to the present invention is used will be described. A contact material with the following specifications was installed in an aeration tank as shown in Figure 3 to treat domestic wastewater, and the treatment status was investigated over a period of approximately one year. The results are shown in Table 1. Water treatment contact material specifications Material Chain stitch yarn: Polyester multifilament 1500d/140f 2 pieces Insert yarn: Polyester crimped yarn (crimp elongation rate
20%) 1500d/140f 1 polyester multifilament non-crimped yarn 1500d/140f 1 piece ●Form: Square rattussel knitted fabric (as shown in Figure 1) ●Void ratio: 45% ●Void area: 6cm 2 / piece ●Filling amount (1m width x 1m length) x 10 sheets/m 3 - Aeration tank For comparison, the same procedure as above was used except that polyester tire cord yarn (crimped elongation rate 0%) was used as the insertion yarn. The results of the treatment are also shown in Table 1. The treated buildup is stable throughout the year, and the treated water
Satisfactory results were obtained with BOD of 20 mg/L or less and SS of 20 mg/L or less. Furthermore, as a result of observing the adhesion status of the biofilm, it was found that the biofilm adhered three-dimensionally to the network structure of the knitted fabric, and there was almost no blockage of the voids. Furthermore, as an effect of the two-layer structure, it was not observed that adjacent contact materials were in close contact with each other.
【表】【table】
【表】
（発明の効果）
本発明に係る水処理用接触材は、挿入糸に無捲
縮糸とマルチフイラメント糸の捲縮加工糸の複数
層で構成されている角目ラツセル編地からなり、
曝気槽内に極めて容易に規則的間隔でセツトする
ことができ、また、軽いので取扱い易く、運搬も
容易で、保管のスペースもほとんどいらない。[Table] (Effects of the Invention) The contact material for water treatment according to the present invention is made of a square lattice knitted fabric in which the inserted yarn is composed of multiple layers of non-crimped yarn and crimped multifilament yarn. ,
They can be set very easily in an aeration tank at regular intervals, are light, easy to handle, easy to transport, and require little space for storage.
第１図は、本発明の水処理用接触材の一例を示
す概略平面図である。第２図は、その概略断面図
を示す。第３図は、本発明の水処理用接触材を曝
気槽に張設した場合の一態様を示す斜視図であ
る。
１：水処理用接触材、２：鎖編糸、３：挿入糸
（無捲縮糸）、３′：挿入糸（捲縮糸）、４：空隙部
（網目）、５：曝気槽、６：結線バンド、７：曝気
用空気吹込管。
FIG. 1 is a schematic plan view showing an example of the contact material for water treatment of the present invention. FIG. 2 shows a schematic cross-sectional view thereof. FIG. 3 is a perspective view showing an embodiment in which the contact material for water treatment of the present invention is installed in an aeration tank. 1: Contact material for water treatment, 2: Chain knitting yarn, 3: Inserted yarn (non-crimped yarn), 3': Inserted yarn (crimped yarn), 4: Void (mesh), 5: Aeration tank, 6 : Connection band, 7: Air blowing pipe for aeration.
Claims (1)
糸により所定間隔ごとに連結されて方形の空隙部
が形成された角目ラツセル編地からなる水処理用
接触材において、挿入糸が無捲縮の糸条の層と捲
縮伸長率が５〜30％を有する合成繊維マルチフイ
ラメント捲縮加工糸の層との複数層で構成されて
いることを特徴とする水処理用接触材。1. In a contact material for water treatment consisting of a square ratchet knitted fabric in which square voids are formed by connecting a plurality of chain stitch yarns arranged in parallel at predetermined intervals with insertion yarns, the insertion yarns A contact material for water treatment, comprising a plurality of layers: a layer of uncrimped yarn and a layer of synthetic fiber multifilament crimped yarn having a crimp elongation rate of 5 to 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60223171A JPS6283094A (en) | 1985-10-07 | 1985-10-07 | Contact material for treating water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60223171A JPS6283094A (en) | 1985-10-07 | 1985-10-07 | Contact material for treating water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6283094A JPS6283094A (en) | 1987-04-16 |
| JPH024358B2 true JPH024358B2 (en) | 1990-01-26 |
Family
ID=16793913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60223171A Granted JPS6283094A (en) | 1985-10-07 | 1985-10-07 | Contact material for treating water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6283094A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0576600U (en) * | 1992-03-31 | 1993-10-19 | 前田工繊株式会社 | Contact material for sewage treatment |
| 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 |
| 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 |
| 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 |
| 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 |
| BRPI0620774A2 (en) * | 2005-12-27 | 2011-11-22 | Bioprocess H2O Llc | biological apparatus and method |
| JP2011045797A (en) * | 2009-08-25 | 2011-03-10 | Nippon Solid Co Ltd | Purification membrane for treatment of sewage |
-
1985
- 1985-10-07 JP JP60223171A patent/JPS6283094A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6283094A (en) | 1987-04-16 |
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