JPH11207344A - Treatment of sand filtration back washing waste water - Google Patents
Treatment of sand filtration back washing waste waterInfo
- Publication number
- JPH11207344A JPH11207344A JP1257198A JP1257198A JPH11207344A JP H11207344 A JPH11207344 A JP H11207344A JP 1257198 A JP1257198 A JP 1257198A JP 1257198 A JP1257198 A JP 1257198A JP H11207344 A JPH11207344 A JP H11207344A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- bag
- water
- wound body
- membrane module
- 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.)
- Granted
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、砂濾過逆洗排水を
スパイラル型膜モジュールによって処理する方法に係
り、特に浄水場などに設けられた砂濾過装置の逆洗排水
を処理する場合に好適な方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating backwash wastewater by sand filtration using a spiral type membrane module, and particularly suitable for treating backwash wastewater from a sand filter installed in a water purification plant or the like. About the method.
【０００２】[0002]
【従来の技術】浄水場などにおいては砂濾過装置が広く
用いられている。この砂濾過装置によれば種々のＳＳ
（懸濁物質）のほかクリプトポリジウム等の原虫をも除
去することができる。2. Description of the Related Art Sand filtration devices are widely used in water purification plants and the like. According to this sand filtration device, various SS
In addition to (suspension substances), protozoa such as cryptopolydium can be removed.
【０００３】通常の浄水場の場合、１日２４時間のうち
２２時間程度原水を砂濾過装置に通水し２時間程度逆洗
することが多い。この逆洗排水はタンクに貯えられ、沈
降分離処理や凝集処理された後、放流されている。In the case of a normal water purification plant, raw water is often passed through a sand filtration device for about 22 hours out of 24 hours a day and backwashed for about 2 hours. This backwashing wastewater is stored in a tank, settled and separated, or coagulated, and then discharged.
【０００４】ところで、膜分離装置に用いられる膜モジ
ュールとして、集水管の外周に分離膜を巻回したスパイ
ラル型膜モジュールがある。As a membrane module used in a membrane separation apparatus, there is a spiral membrane module in which a separation membrane is wound around the outer periphery of a water collecting pipe.
【０００５】図５は従来のスパイラル型膜モジュールの
構造を示す一部分解斜視図であり、集水管１の外周に複
数の袋状の分離膜２がメッシュスペーサ３を介して巻回
されている。FIG. 5 is a partially exploded perspective view showing the structure of a conventional spiral type membrane module. A plurality of bag-shaped separation membranes 2 are wound around a water collecting pipe 1 via a mesh spacer 3.
【０００６】集水管１には管内外を連通するスリット状
開口が穿設されている。分離膜２は袋状のものであり、
その中央部が集水管１をくるんでいる。この袋状分離膜
２の内部にはメッシュスペーサ等よりなる流路材４が挿
入されており、この袋状分離膜（袋状膜）２の内部が透
過水流路となっている。The water collecting pipe 1 is provided with a slit-like opening communicating between the inside and the outside of the pipe. The separation membrane 2 has a bag shape,
The central part surrounds the water collection pipe 1. A channel material 4 made of a mesh spacer or the like is inserted inside the bag-shaped separation membrane 2, and the inside of the bag-shaped separation membrane (bag-shaped membrane) 2 is a permeated water channel.
【０００７】袋状膜２の巻回体５の両端にトップリング
６とエンドリング７とが設けられ、その外周にブライン
シール８が周設されている。A top ring 6 and an end ring 7 are provided at both ends of the wound body 5 of the bag-like membrane 2, and a brine seal 8 is provided around the outer periphery thereof.
【０００８】原水は、巻回体５の前端面から袋状膜２同
士の間の原水流路に流入し、そのまま巻回体５の長手方
向に流れ、巻回体５の後端面から濃縮水として流出す
る。この原水流路を流れる間に水が袋状膜２を透過して
その内部に入り、集水管１内に流入し、該集水管１の後
端側からモジュール外に取り出される。The raw water flows into the raw water flow path between the bag-like membranes 2 from the front end face of the wound body 5, flows as it is in the longitudinal direction of the wound body 5, and concentrates from the rear end face of the wound body 5. Leaked as. While flowing through the raw water flow path, water permeates the bag-like membrane 2 and enters the inside thereof, flows into the water collecting pipe 1, and is taken out of the module from the rear end side of the water collecting pipe 1.
【０００９】[0009]
【発明が解決しようとする課題】通常の浄水場の場合、
砂濾過装置の逆洗排水量は１日の通水原水量の約７〜１
０％程度である。従来は、この逆洗排水を再利用するこ
となく放流しているため、原水から得られる処理水量の
割合（回収率）は９０〜９３％程度ということになる。
本発明は、この回収率を高めることを第１の目的とす
る。In the case of a normal water treatment plant,
The amount of backwash wastewater from the sand filter is about 7 to 1 of the daily raw water flow.
It is about 0%. Conventionally, since this backwash wastewater is discharged without reuse, the ratio of the amount of treated water obtained from raw water (recovery rate) is about 90 to 93%.
The first object of the present invention is to increase the recovery rate.
【００１０】ところで、図５の従来のスパイラル型膜モ
ジュールには、次のような解決すべき課題があった。The conventional spiral type membrane module shown in FIG. 5 has the following problems to be solved.
【００１１】 集水管１内の透過水流量を多くするた
めには該集水管１を大径化する必要があるが、そのよう
にするとスパイラル型膜モジュールの径も大きくなって
しまう。 袋状膜２内に透過してきた透過水は、該袋状膜２内
をスパイラル状に回りながら集水管１まで流れるため、
袋状膜２内の流通抵抗が大きい。しかも、袋状膜２内か
ら集水管１に流れ込む集水管スリット部付近での流通抵
抗も大きい。 原水流路を流れる原水流量は、下流側になるほど減
少する。（原水が濃縮される分だけ原水流量が減る。）
このため、原水流路下流域では原水流速が小さくなり、
汚れが付着し易くなる。In order to increase the flow rate of the permeated water in the water collecting pipe 1, it is necessary to increase the diameter of the water collecting pipe 1, but in such a case, the diameter of the spiral membrane module also becomes large. The permeated water that has permeated into the bag-shaped membrane 2 flows to the water collecting pipe 1 while spirally flowing through the bag-shaped membrane 2.
The flow resistance in the bag-like membrane 2 is large. Moreover, the flow resistance near the slit portion of the water collecting pipe flowing into the water collecting pipe 1 from the inside of the bag-shaped membrane 2 is large. The flow rate of the raw water flowing through the raw water flow path decreases toward the downstream side. (The flow rate of raw water decreases as much as the raw water is concentrated.)
For this reason, the raw water flow velocity is low in the downstream of the raw water flow path,
Dirt easily adheres.
【００１２】本発明は、上記従来の問題点を解決し、集
水管が不要であり、透過水流通抵抗が小さいスパイラル
型膜モジュールにより砂濾過逆洗排水を効率良く処理す
ることができる砂濾過逆洗排水の処理方法を提供するこ
とを第２の目的とする。The present invention solves the above-mentioned conventional problems, and does not require a water collecting pipe, and can efficiently treat sand filtration backwash wastewater by a spiral membrane module having low permeated water flow resistance. A second object is to provide a method for treating washing wastewater.
【００１３】[0013]
【課題を解決するための手段】本発明の砂濾過逆洗排水
の処理方法は、砂濾過逆洗排水をスパイラル型膜モジュ
ールによって処理する方法であって、該スパイラル型膜
モジュールは、膜をシャフトに巻回して巻回体とし、該
巻回体の一端面から原水が供給され、透過水が巻回体の
他端面から取り出されるものである。The method for treating sand-filtered backwash wastewater according to the present invention is a method for treating sand-filtered backwash wastewater by a spiral-type membrane module. The raw water is supplied from one end face of the wound body, and the permeated water is taken out from the other end face of the wound body.
【００１４】かかる本発明方法によれば、砂濾過逆洗排
水を膜分離処理するため、この膜分離処理の透過水を原
水の砂濾過処理水に加えることができ、この結果水の回
収率が著しく高いものとなる。なお、この膜としては限
外濾過膜、精密濾過膜などが好ましい。According to the method of the present invention, since the sand-filtered backwash wastewater is subjected to membrane separation treatment, the permeated water of this membrane separation treatment can be added to the raw sand filtration treatment water. It will be significantly higher. The membrane is preferably an ultrafiltration membrane, a microfiltration membrane, or the like.
【００１５】本発明で採用するスパイラル型膜モジュー
ルは、袋状膜の内部に透過水流路材が配置され、袋状膜
同士の間には原水流路材が配置されているスパイラル型
膜モジュールであって、該袋状膜は第１、第２、第３及
び第４の辺部を有した略方形であり、該第１、第２及び
第３の辺部は封じられ、該第４の辺部は一部が開放部と
なり残部が閉鎖部となっており、前記第４の辺部と直交
する第１の辺部をシャフトに当てて袋状膜を巻回して巻
回体とし、前記第４の辺部を該巻回体の後端面に臨ま
せ、該第４の辺部に対向する第２の辺部を該巻回体の前
端面に臨ませ、該袋状膜同士の間の原水流路は、該第３
の辺部の全体が封じられると共に、第４の辺部にあって
は前記袋状膜の開放部と重なる箇所が閉鎖部となってお
り、且つ前記袋状膜の閉鎖部と重なる箇所が開放部とな
っていることが好ましい。The spiral-type membrane module employed in the present invention is a spiral-type membrane module in which a permeated water flow path material is disposed inside a bag-like membrane, and a raw water flow path material is disposed between the bag-like membranes. The bag-like membrane is substantially rectangular with first, second, third and fourth sides, and the first, second and third sides are sealed and the fourth A part of the side part is an open part and the remaining part is a closed part, and a first side part orthogonal to the fourth side part is applied to a shaft to wind a bag-like membrane to form a wound body, The fourth side faces the rear end face of the wound body, the second side facing the fourth side faces the front end face of the wound body, between the bag-shaped films. The raw water flow path of the third
The entire side of the bag-shaped membrane is sealed, and in the fourth side, a portion overlapping with the open portion of the bag-shaped film is a closed portion, and a portion overlapping with the closed portion of the bag-shaped film is open. It is preferably a part.
【００１６】かかるスパイラル型膜モジュールにおいて
は、巻回体の前端面から原水が原水流路に流入する。こ
の原水は、原水流路を巻回体軸心線と略平行方向に流
れ、次いで巻回体後端面の原水流路開放部から濃縮水と
して流出する。In such a spiral type membrane module, raw water flows into the raw water flow path from the front end face of the wound body. The raw water flows through the raw water flow path in a direction substantially parallel to the axis of the wound body, and then flows out as concentrated water from the raw water flow path opening at the rear end face of the wound body.
【００１７】袋状膜を透過した水は、袋状膜内を巻回体
軸心線と略平行方向に流れ、巻回体の後端面の袋状膜開
放部から流出する。The water that has passed through the bag-like membrane flows in the bag-like membrane in a direction substantially parallel to the axis of the wound body, and flows out from the bag-shaped membrane opening at the rear end face of the wound body.
【００１８】このように、透過水が袋状膜内を巻回体の
軸心線と平行方向に流れるため、従来のスパイラル型膜
モジュールに用いられていた集水管が不要となる。そし
て、袋状膜内から該集水管内に流れ込む際の流通抵抗が
無くなり、透過水流通抵抗が小さくなる。As described above, since the permeated water flows in the bag-shaped membrane in a direction parallel to the axis of the wound body, the water collecting pipe used in the conventional spiral type membrane module becomes unnecessary. Then, there is no flow resistance when flowing into the water collecting pipe from inside the bag-shaped membrane, and the flow resistance of permeated water is reduced.
【００１９】なお、集水管を無くしているため、その分
だけ袋状膜の巻回方向の長さを大きくとることができ、
膜面積を拡張できる。そして、このように袋状膜の巻回
方向長さを大きくしても透過水の流通抵抗は増大せず、
透過水量を多くすることができる。In addition, since the water collecting pipe is eliminated, the length of the bag-shaped membrane in the winding direction can be increased by that much.
The membrane area can be expanded. And even if the length in the winding direction of the bag-like membrane is increased, the flow resistance of the permeated water does not increase,
The amount of permeated water can be increased.
【００２０】また、巻回体の後端面の一部においてのみ
原水流路を開放させるようにしているため、原水流路の
下流側での原水（濃縮水）流速を従来よりも高めること
ができ、原水流路下流域における汚れの付着を防止でき
る。Further, since the raw water flow path is opened only at a part of the rear end face of the wound body, the flow rate of raw water (concentrated water) downstream of the raw water flow path can be increased as compared with the conventional case. In addition, the adhesion of dirt in the downstream area of the raw water flow path can be prevented.
【００２１】[0021]
【発明の実施の形態】以下図面を参照して発明の実施の
形態に用いられるスパイラル型膜モジュールについて説
明する。図１（ａ）はこのスパイラル型膜モジュールの
袋状膜及び該袋状膜が巻き付けられるシャフトの斜視図
である。図１（ｂ），（ｃ）はそれぞれ図１（ａ）のＢ
−Ｂ線、Ｃ−Ｃ線に沿う断面図である。図２はシャフト
の周りに袋状膜を巻き付ける方法を示す断面図、図３は
巻回体とソケットとの係合関係を示す斜視図、図４はス
パイラル型膜モジュールの側面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A spiral type membrane module used in an embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a perspective view of a bag-like membrane of the spiral membrane module and a shaft around which the bag-like membrane is wound. FIGS. 1B and 1C respectively show B in FIG. 1A.
It is sectional drawing which follows the -B line and CC line. FIG. 2 is a sectional view showing a method of winding a bag-like membrane around a shaft, FIG. 3 is a perspective view showing an engagement relationship between a wound body and a socket, and FIG. 4 is a side view of a spiral membrane module.
【００２２】図１に示すように、この袋状膜１０は、正
方形又は長方形状のものであり、第１の辺部１１、第２
の辺部１２、第３の辺部１３及び第４の辺部１４を有し
ている。第１の辺部１１、第２の辺部１２及び第３の辺
部１３において分離膜フィルム４０同士が接着剤等によ
って接着され、第４の辺部１４については一部だけを接
着している。なお、袋状膜１０としては、長い一枚のフ
ィルム４０を第２の辺部１２部分で二つに折り返し、第
１の辺部１１、第３の辺部１３及び第４の辺部１４の一
部を接着するようにしたものであっても良い。As shown in FIG. 1, the bag-like film 10 has a square or rectangular shape, and has a first side portion 11 and a second side portion.
, A third side 13, and a fourth side 14. In the first side 11, the second side 12, and the third side 13, the separation membrane films 40 are bonded to each other with an adhesive or the like, and only a part of the fourth side 14 is bonded. . In addition, as the bag-like film 10, one long film 40 is folded in two at the second side 12, and the first side 11, the third side 13, and the fourth side 14 are formed. A part of which may be bonded may be used.
【００２３】第４の辺部１４の途中から第３の辺部１３
にかけて袋状膜１０の分離膜フィルム同士４０が接着さ
れておらず、透過水流出用の開放部３０となっている。
また、この第４の辺部１４の該途中から第１の辺部１１
にかけては、袋状膜１０の分離膜フィルム同士が接着さ
れており、透過水の流出を阻止する閉鎖部３１となって
いる。From the middle of the fourth side portion 14 to the third side portion 13
The separation membrane films 40 of the bag-like membrane 10 are not adhered to each other, and the opening portion 30 for permeated water outflow is formed.
Also, from the middle of the fourth side portion 14, the first side portion 11
In, the separation membrane films of the bag-like membrane 10 are adhered to each other to form a closed portion 31 that prevents outflow of permeated water.
【００２４】この袋状膜１０内に透過水流路材（例えば
メッシュスペーサ等よりなる。）１５が挿入配置されて
いる。In the bag-like membrane 10, a permeated water flow path material (made of, for example, a mesh spacer) 15 is inserted and arranged.
【００２５】この袋状膜１０の一方の面には、接着剤１
６が付着されると共に他方の面には接着剤１７，１８が
付着され、この袋状膜１０がシャフト２０の周りに巻き
付けられる。接着剤１６は第１の辺部１１に沿って付着
され、接着剤１７は第３の辺部１３に沿って付着されて
いる。接着剤１８は第４の辺部１４の長手方向の前記途
中箇所から第３の辺部１３にかけて、透過水流出用の開
放部３０に沿って付着されている。On one surface of the bag-like film 10, an adhesive 1
6 is adhered and adhesives 17 and 18 are adhered to the other surface, and the bag-like film 10 is wound around the shaft 20. The adhesive 16 is applied along the first side 11, and the adhesive 17 is applied along the third side 13. The adhesive 18 is applied along the opening 30 for outflow of permeated water from the intermediate portion in the longitudinal direction of the fourth side portion 14 to the third side portion 13.
【００２６】複数枚の袋状膜１０をシャフト２０の周囲
に巻き付けることにより、重なり合った袋状膜１０同士
は接着剤１７，１８の部分において水密的に接合され
る。これにより、袋状膜１０同士の間には原水（及び濃
縮水）が流れる原水流路が構成される。接着剤１８が硬
化することにより、巻回体の後端面には、内周側に原水
（濃縮水）の流出用の開放部が形成され、外周側に原水
流出阻止用の閉鎖部が形成される。By winding a plurality of bag-like films 10 around the shaft 20, the overlapping bag-like films 10 are joined to each other at the adhesives 17 and 18 in a water-tight manner. Thus, a raw water flow path through which raw water (and concentrated water) flows is formed between the bag-shaped membranes 10. As the adhesive 18 cures, an open portion for flowing out the raw water (concentrated water) is formed on the rear end surface of the wound body on the inner peripheral side, and a closing portion for preventing raw water outflow is formed on the outer peripheral side. You.
【００２７】第４の辺部１４のうち透過水流出用の開放
部３０と透過水流出阻止用の閉鎖部３１との境界部分か
ら、巻回体の後方に向ってフィン１９が延設されてい
る。このフィン１９は、例えば合成樹脂フィルム又はシ
ートよりなり、袋状膜１０に対し接着等により接合され
るのが好ましい。Fins 19 extend from the boundary between the open portion 30 for permeated water outflow and the closed portion 31 for permeated water outflow prevention in the fourth side portion 14 toward the rear of the wound body. I have. The fins 19 are made of, for example, a synthetic resin film or sheet, and are preferably bonded to the bag-like film 10 by adhesion or the like.
【００２８】袋状膜１０をシャフト２０の周りに図２の
如く原水流路材（メッシュスペーサ）２９を介して巻き
付けることにより、図３に示すように巻回体２４が形成
される。この巻回体２４の後端面からは、フィン１９が
延出する。各袋状膜１０の第４の辺部１４において同一
箇所にフィン１９を設けておくことにより、フィン１９
は巻回体２４の軸心から等半径位上に位置し、フィン１
９が重なり合うことによりフィン１９がリング状の突出
部を形成することになる。このリング状の突出部内に円
筒状のソケット２５の後端を挿入し、該ソケット２５と
フィン１９を接着剤等により接合する。なお、ソケット
２５をフィン１９に外嵌めしても良い。また、フィン１
９に沿って巻回体２４の後端面に旋盤で切込み溝を付
け、該溝にソケット２５の端部を埋め込むようにしても
良い。By winding the bag-like membrane 10 around the shaft 20 via a raw water flow path material (mesh spacer) 29 as shown in FIG. 2, a wound body 24 is formed as shown in FIG. The fin 19 extends from the rear end face of the wound body 24. By providing the fins 19 at the same location on the fourth side portion 14 of each bag-like film 10, the fins 19
Are located equiradially from the axis of the winding body 24 and
The fins 19 form a ring-shaped protrusion by overlapping the 9. The rear end of the cylindrical socket 25 is inserted into the ring-shaped protrusion, and the socket 25 and the fin 19 are joined with an adhesive or the like. Note that the socket 25 may be externally fitted to the fin 19. Also, fin 1
A cutting groove may be formed on the rear end face of the wound body 24 along the line 9 by a lathe, and the end of the socket 25 may be embedded in the groove.
【００２９】このようにソケット２５とフィン１９とを
接合することにより、巻回体２４の後端面の外周側の透
過水流出領域とソケット２５の内周側の濃縮水流出領域
とが区画される。By joining the socket 25 and the fin 19 in this manner, a permeated water outflow area on the outer peripheral side of the rear end face of the wound body 24 and a concentrated water outflow area on the inner peripheral side of the socket 25 are defined. .
【００３０】なお、袋状膜１０をシャフト２０の周りに
巻き付けるに際しては、図２に示すように、袋状膜１０
同士の間に原水流路材（メッシュスペーサ）２９を介在
させておく。これらのメッシュスペーサ２９を介在させ
ることにより、原水流路が構成される。When the bag-like film 10 is wound around the shaft 20, as shown in FIG.
A raw water flow path material (mesh spacer) 29 is interposed between them. The raw water flow path is formed by interposing these mesh spacers 29.
【００３１】図４に示すように、巻回体２４の前縁及び
後縁にそれぞれトップリング２６及びエンドリング２７
を合成樹脂モールド等により形成し、トップリング２６
の外周にブラインシール２８を周設する。As shown in FIG. 4, a top ring 26 and an end ring 27 are provided at the leading edge and the trailing edge of the wound body 24, respectively.
Is formed by a synthetic resin mold or the like, and the top ring 26 is formed.
A brine seal 28 is provided around the outer periphery of.
【００３２】本発明の砂濾過逆洗排水の処理方法は、こ
のように構成されたスパイラル型膜モジュールによって
砂濾過逆洗排水を処理するものである。この逆洗排水
は、図４に示すように、巻回体２４の前端面から原水と
して袋状膜１０同士の間の原水流路に流入する。この原
水は、巻回体２４の軸心線と略平行方向に原水流路を流
れ、巻回体２４の後端のソケット２５の内側の端面から
取り出される。そして、このように原水が原水流路を流
れる間に、水が袋状膜１０内に透過し、透過水は巻回体
２４の後端面のうちソケット２５の外周側から流出す
る。The method for treating sand filtration backwash wastewater of the present invention is to treat sand filtration backwash wastewater by the spiral membrane module configured as described above. As shown in FIG. 4, the backwash drainage flows from the front end face of the wound body 24 as raw water into the raw water flow path between the bag-shaped membranes 10. This raw water flows through the raw water flow path in a direction substantially parallel to the axis of the wound body 24, and is taken out from the end face inside the socket 25 at the rear end of the wound body 24. Then, while the raw water flows through the raw water flow path, the water permeates into the bag-like membrane 10, and the permeated water flows out from the outer peripheral side of the socket 25 on the rear end surface of the wound body 24.
【００３３】この透過水が砂濾過装置の処理水に加えら
れることにより、水の回収率が著しく高いものとなる。
即ち、従来の砂濾過装置では回収率が９０〜９３％程度
であったが、本発明では、回収されないのはスパイラル
型膜モジュールの逆洗排水だけとなり、全体としての回
収率は９９．５％以上となる。By adding the permeated water to the treated water of the sand filtration device, the water recovery rate becomes extremely high.
That is, in the conventional sand filtration device, the recovery rate is about 90 to 93%, but in the present invention, only the backwash drainage of the spiral type membrane module is not recovered, and the overall recovery rate is 99.5%. That is all.
【００３４】このスパイラル型膜モジュールにあって
は、透過水が袋状膜１０内を巻回体２４の軸心線と平行
方向に流れて後端面から取り出されるため、従来のスパ
イラル型膜モジュールに用いられていた集水管が不要で
ある。このため、袋状膜から集水管内に流れ込む際の流
通抵抗が無くなり、透過水流通抵抗が著しく小さくな
る。In this spiral type membrane module, the permeated water flows in the bag-like membrane 10 in a direction parallel to the axis of the wound body 24 and is taken out from the rear end face. The used collecting pipe is unnecessary. For this reason, the flow resistance when flowing from the bag-like membrane into the water collecting pipe is eliminated, and the permeated water flow resistance is significantly reduced.
【００３５】なお、集水管を省略しており、その分だけ
袋状膜１０の巻回方向の長さを大きくとることができ、
膜面積を大きくとることが可能である。袋状膜の巻回方
向の長さを大きくしても、透過水流通抵抗は増大せず、
透過水量を多くすることができる。The water collecting pipe is omitted, and the length of the bag-like membrane 10 in the winding direction can be increased by that much.
It is possible to increase the film area. Even if the length of the bag-like membrane in the winding direction is increased, the permeated water flow resistance does not increase,
The amount of permeated water can be increased.
【００３６】このスパイラル型膜モジュールにあって
は、原水流路の出口部分をソケット２５の内側だけに設
けており、原水流路の出口（最下流部）を絞った構成と
しているため、原水流路の下流側においても原水（濃縮
水）の流速が十分に大きなものとなり、原水流路下流域
における汚れの付着を防止することができる。なお、ソ
ケット２５の内側の面積と外側の面積（接着剤１８の辺
部１４方向の長さ）は、このスパイラル型膜モジュール
の水回収率に応じて決めるのが好ましい。In this spiral type membrane module, the outlet portion of the raw water flow path is provided only inside the socket 25, and the outlet (the most downstream portion) of the raw water flow path is narrowed. The flow rate of the raw water (concentrated water) becomes sufficiently large also on the downstream side of the road, and the adhesion of dirt in the downstream area of the raw water flow path can be prevented. The area inside and outside the socket 25 (the length of the adhesive 18 in the side portion 14 direction) is preferably determined according to the water recovery rate of the spiral membrane module.
【００３７】このスパイラル型膜モジュールは、このよ
うにきわめて効率良く逆洗排水を膜分離処理することが
できるため、砂濾過装置から排出される逆洗排水を貯え
ておくためのタンクが容量の小さいもので足りる。Since the spiral-wound membrane module is capable of performing the membrane separation treatment of the backwash wastewater with extremely high efficiency, the tank for storing the backwash wastewater discharged from the sand filtration device has a small capacity. Things are enough.
【００３８】上記実施の形態においては、ソケット２５
の外周側に透過水流出部を配置し、ソケット２５の内側
に濃縮水流出部を配置しているが、逆にソケット２５の
内側を透過水流出部とし、ソケット２５の外周側を濃縮
水流出部とするように構成しても良い。In the above embodiment, the socket 25
A permeated water outflow portion is arranged on the outer peripheral side of the socket 25, and a concentrated water outflow portion is arranged inside the socket 25. Conversely, the inside of the socket 25 is used as the permeated water outflow portion, and the outer peripheral side of the socket 25 is concentrated water outflow. It may be configured to be a part.
【００３９】[0039]
【実施例】以下、実施例及び比較例について説明する。EXAMPLES Examples and comparative examples will be described below.
【００４０】［実施例１］膜として限外濾過膜を用いた
図１〜４に示す構成のスパイラル型膜モジュールを用い
てＳＳを０．３％含む砂濾過逆洗排水を処理した。[Example 1] Sand filtration backwash wastewater containing 0.3% SS was treated using a spiral type membrane module having an ultrafiltration membrane as a membrane and having a structure shown in Figs.
【００４１】この膜モジュールの膜面積は０．８７ｍ2
であり、直径は１０ｃｍ、長さは４０ｃｍである。The membrane area of this membrane module is 0.87 m 2
And the diameter is 10 cm and the length is 40 cm.
【００４２】この砂濾過逆洗排水を１０．５ｍ3／ｍ2／
ｄａｙにて通水したところ、透過水流束は１０ｍ3／ｍ2
／ｄａｙであった。なお、透過水の回収率は９３％、透
過水のＳＳは０．１ｐｐｍ以下であった。The sand-filtered backwash wastewater was drained to 10.5 m 3 / m 2 /
As a result, the permeated water flux was 10 m 3 / m 2.
/ Day. The permeated water recovery was 93%, and the permeated water SS was 0.1 ppm or less.
【００４３】［比較例１］図５に示す構成のスパイラル
型膜モジュール（膜面積は実施例１と同じ。直径１０ｃ
ｍ、長さ１００ｃｍ）を用いたこと以外は実施例１と同
様にして同じ砂濾過逆洗排水を処理したところ、透過水
流束は１．５ｍ3／ｍ2／ｄａｙと実施例に比べかなり低
いものであった。なお、透過水の回収率は５０％、透過
水のＳＳは０．１ｐｐｍ以下であった。Comparative Example 1 A spiral type membrane module having the structure shown in FIG. 5 (the membrane area is the same as that of Example 1; diameter 10c)
m, 100 cm in length) except that the same sand filtration backwash wastewater was treated in the same manner as in Example 1, and the permeate flux was 1.5 m 3 / m 2 / day, which was considerably lower than that of Example. Was something. The permeated water recovery was 50%, and the permeated water SS was 0.1 ppm or less.
【００４４】[0044]
【発明の効果】以上の通り、本発明の砂濾過逆洗排水の
処理方法は、該逆洗排水を膜分離処理するため、この膜
透過水を砂濾過処理水に加えることができ、水の回収率
が著しく高い。本発明（請求項２）で採用するスパイラ
ル型膜モジュールは原水をきわめて効率良く膜分離処理
することができるものであり、砂濾過逆洗排水を一時的
に貯めておくためのタンクの容量が小さくて済むように
なる。As described above, in the method for treating backwash wastewater by sand filtration according to the present invention, since the backwash wastewater is subjected to membrane separation treatment, the membrane permeated water can be added to the sand filtration treatment water. The recovery is remarkably high. The spiral membrane module employed in the present invention (claim 2) is capable of extremely efficiently performing membrane separation treatment of raw water, and has a small tank capacity for temporarily storing sand filtration backwash wastewater. Will be done.
【図１】（ａ）図は実施の形態に係る砂濾過逆洗排水の
処理方法に用いられるスパイラル型膜モジュールの袋状
膜の斜視図、（ｂ）図は（ａ）図のＢ−Ｂ線に沿う断面
図、（ｃ）図は（ａ）図のＣ−Ｃ線に沿う断面図であ
る。FIG. 1A is a perspective view of a bag-like membrane of a spiral membrane module used in a method for treating sand filtration backwash wastewater according to an embodiment, and FIG. 1B is a BB view of FIG. FIG. 3C is a cross-sectional view taken along the line C-C in FIG.
【図２】図１のスパイラル型膜モジュールの袋状膜の巻
き付け方法を示す断面図である。FIG. 2 is a cross-sectional view showing a method of winding a bag-like membrane of the spiral membrane module of FIG.
【図３】図１の膜モジュールの巻回体とソケットとの係
合関係を示す斜視図である。FIG. 3 is a perspective view showing an engagement relationship between a wound body and a socket of the membrane module of FIG. 1;
【図４】図１のスパイラル型膜モジュールの側面図であ
る。FIG. 4 is a side view of the spiral membrane module of FIG. 1;
【図５】従来のスパイラル型膜モジュールの構造を示す
一部分解斜視図である。FIG. 5 is a partially exploded perspective view showing the structure of a conventional spiral membrane module.
１０ 袋状膜 １１ 第１の辺部 １２ 第２の辺部 １３ 第３の辺部 １４ 第４の辺部 １５ 流路材 １６，１７，１８ 接着剤 １９ フィン ２０ シャフト ２４ 巻回体 ２５ ソケット ２９ メッシュスペーサ ３０ 透過水流出用の開放部 ３１ 透過水流出阻止用の閉鎖部 Reference Signs List 10 bag-like membrane 11 first side 12 second side 13 third side 14 fourth side 15 flow path material 16, 17, 18 adhesive 19 fin 20 shaft 24 wound body 25 socket 29 Mesh spacer 30 Open part for permeate outflow 31 Closed part for permeate outflow prevention
───────────────────────────────────────────────────── フロントページの続き (72)発明者 重見 弘毅 東京都新宿区西新宿３丁目４番７号 栗田 工業株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroki Shigemi 3-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo Inside Kurita Kogyo Co., Ltd.
Claims (2)
ールによって処理する方法であって、 該スパイラル型膜モジュールは、膜をシャフトに巻回し
て巻回体とし、該巻回体の一端面から原水が供給され、
透過水が巻回体の他端面から取り出されるものであるこ
とを特徴とする砂濾過逆洗排水の処理方法。1. A method of treating sand-filtered backwash wastewater by a spiral-type membrane module, wherein the spiral-type membrane module winds a membrane around a shaft to form a wound body, and from one end surface of the wound body. Raw water is supplied,
A method of treating sand-filtered backwash wastewater, wherein permeated water is taken out from the other end surface of the wound body.
水流路材が配置された袋状膜であり、該袋状膜は第１、
第２、第３及び第４の辺部を有した略方形であり、該第
１、第２及び第３の辺部は封じられ、該第４の辺部は一
部が開放部となり残部が閉鎖部となっており、 前記スパイラル型膜モジュールは、前記第４の辺部と直
交する第１の辺部をシャフトに当てて袋状膜を巻回して
巻回体とし、前記第４の辺部を該巻回体の後端面に臨ま
せ、該第４の辺部に対向する第２の辺部を該巻回体の前
端面に臨ませ、 該袋状膜同士の間の原水流路は、該第３の辺部の全体が
封じられると共に、第４の辺部にあっては前記袋状膜の
開放部と重なる箇所が閉鎖部となっており、且つ前記袋
状膜の閉鎖部と重なる箇所が開放部となっているスパイ
ラル型膜モジュールであることを特徴とする砂濾過逆洗
排水の処理方法。2. The bag according to claim 1, wherein the membrane is a bag-like membrane in which a permeated water channel material is disposed, and the bag-like membrane is a first membrane.
It is a substantially rectangular shape having second, third and fourth sides, the first, second and third sides are sealed, the fourth side is partially open, and the remainder is The spiral membrane module is a closed body, and the first side perpendicular to the fourth side is applied to a shaft to wind a bag-shaped membrane to form a wound body, and the fourth side is formed. Part facing the rear end face of the wound body, a second side part facing the fourth side part facing the front end face of the wound body, and a raw water flow path between the bag-shaped membranes. The third side portion is entirely sealed, and in the fourth side portion, a portion overlapping with the open portion of the bag-shaped film is a closed portion, and the closed portion of the bag-shaped film is closed. A method of treating sand-filtered backwash wastewater, which is a spiral-wound membrane module having an open part overlapping with the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01257198A JP3879223B2 (en) | 1998-01-26 | 1998-01-26 | Sand filtration backwash wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01257198A JP3879223B2 (en) | 1998-01-26 | 1998-01-26 | Sand filtration backwash wastewater treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11207344A true JPH11207344A (en) | 1999-08-03 |
| JP3879223B2 JP3879223B2 (en) | 2007-02-07 |
Family
ID=11809056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01257198A Expired - Fee Related JP3879223B2 (en) | 1998-01-26 | 1998-01-26 | Sand filtration backwash wastewater treatment method |
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| Country | Link |
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| JP (1) | JP3879223B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721024A (en) * | 2017-11-23 | 2018-02-23 | 吉林新金尔科技有限公司 | A kind of dish tubular type membranous system for high concentration wastewater treatment |
-
1998
- 1998-01-26 JP JP01257198A patent/JP3879223B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107721024A (en) * | 2017-11-23 | 2018-02-23 | 吉林新金尔科技有限公司 | A kind of dish tubular type membranous system for high concentration wastewater treatment |
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| Publication number | Publication date |
|---|---|
| JP3879223B2 (en) | 2007-02-07 |
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