JPS6311077B2 - - Google Patents
Info
- Publication number
- JPS6311077B2 JPS6311077B2 JP57135206A JP13520682A JPS6311077B2 JP S6311077 B2 JPS6311077 B2 JP S6311077B2 JP 57135206 A JP57135206 A JP 57135206A JP 13520682 A JP13520682 A JP 13520682A JP S6311077 B2 JPS6311077 B2 JP S6311077B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- waste liquid
- treatment
- concentrated waste
- dehydrator
- 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
Links
- 239000010802 sludge Substances 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 39
- 239000002699 waste material Substances 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 26
- 238000004062 sedimentation Methods 0.000 claims description 15
- 239000002351 wastewater Substances 0.000 claims description 14
- 238000004065 wastewater treatment Methods 0.000 claims description 7
- 239000006228 supernatant Substances 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 208000005156 Dehydration Diseases 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 239000011550 stock solution Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010066901 Treatment failure Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】
本発明は、汚水等の排水処理方法に関するもの
であり、とくに凝集沈澱排水処理における濃厚廃
液の処理方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating wastewater such as sewage, and particularly to a method for treating concentrated waste liquid in coagulation and sedimentation wastewater treatment.
従来行なわれている凝集沈澱処理は、プロセス
からの排水に凝集剤を加え、沈澱槽において上澄
液とスラツジとに分離する方法から成る。そこで
は、スラツジは濃縮汚泥として引き抜かれ、脱水
機（真空脱水機、遠心脱水機、フイルタプレス
等）によりケーキ状の汚泥にされる。プロセスか
ら発生する排水は、通常、濃度も低く安定してい
るが、異常時、たとえばポンプ配管からの原液の
漏洩時、修理時の漏洩時等には濃厚廃液が発生す
る。従来、濃厚廃液が通常のプロセス排水系に流
入すると、凝集沈澱処理不良となり、水質不良の
水を流すこととなるという問題があつた。この凝
集沈澱処理不良を防止するためには、通常のプロ
セス排水系へ濃厚廃液が流入しない様な工夫をす
るとともに、濃厚廃液をプロセス排水系へ平準化
して注入する希釈処理または焼却処理を行なつて
いた。この場合、希釈処理には凝集沈澱処理の処
理が不安定になり処理コストが上昇するという問
題があり、焼却処理には、処理液の成分がほとん
ど水であることから、処理コストが非常に高くな
るという問題があつた。 Conventional coagulation-sedimentation treatment consists of adding a flocculant to the process wastewater and separating it into supernatant liquid and sludge in a settling tank. There, the sludge is extracted as thickened sludge and turned into cake-like sludge using a dehydrator (vacuum dehydrator, centrifugal dehydrator, filter press, etc.). The wastewater generated from processes is usually stable and has a low concentration, but concentrated wastewater is generated in abnormal situations, such as when raw solution leaks from pump piping or during repairs. Conventionally, there has been a problem that when concentrated waste liquid flows into a normal process drainage system, the coagulation and sedimentation treatment becomes defective, resulting in poor quality water being discharged. In order to prevent this coagulation and sedimentation treatment failure, measures must be taken to prevent the concentrated waste liquid from flowing into the normal process drainage system, as well as dilution treatment or incineration treatment in which the concentrated waste liquid is leveled and injected into the process drainage system. was. In this case, dilution treatment has the problem of making the coagulation-sedimentation process unstable and increasing treatment costs, while incineration treatment has the problem of extremely high treatment costs because the treatment liquid is mostly water. There was a problem.
本発明は、上記の問題を解消するために、従来
の凝集沈澱排水処理系を利用して、プロセスから
発生する濃厚排水を確実にかつ安価に処理するこ
とを目的とする。 SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention aims to reliably and inexpensively treat concentrated wastewater generated from a process by using a conventional coagulation-sedimentation wastewater treatment system.
この目的に沿う本発明の凝集沈澱排水処理にお
ける濃厚廃液処理方法は、プロセスからの排水に
凝集剤を加え、沈澱槽で上澄液とスラツジとに分
離し、沈澱したスラツジを濃厚汚泥として引き抜
き脱水機により脱水処理する工程から成る凝集沈
澱排水処理系の方法において、濃厚廃液を前記沈
澱槽による処理工程を通さずに脱水機に直接供給
して脱水処理する方法から成つている。かかる処
理方法にあつては、脱水機のフイルタには一般排
水の濃縮汚泥が付着しており、しかも該濃縮汚泥
には多量の凝集剤が含まれているので、一般排水
系とは別にして脱水機に供給された濃厚廃液を脱
水処理するに際し前記一般排水による付着汚泥は
物理的および化学的なフイルタとしての機能を果
すことになり、濃厚廃液中のスラツジ成分は十分
にとられかつ脱水処理される。該方法では単に濃
厚廃液を脱水機にかければよいので、その濃厚廃
液処理量は本質的に制限を受けず、さらに濃厚廃
液にはとくに凝集剤を添加する必要もなく、設備
的にも特別な装置を設置することなく従来の脱水
機がそのまま使用されるので、濃厚廃液の処理を
安価に行なうことができ、所期の目的が達成され
る。 The method for treating concentrated waste liquid in the coagulation-sedimentation wastewater treatment of the present invention that meets this objective is to add a flocculant to the waste water from the process, separate it into supernatant liquid and sludge in a settling tank, and pull out the settled sludge as thick sludge for dewatering. In a method of a coagulation-sedimentation wastewater treatment system comprising a step of dewatering using a machine, the concentrated waste liquid is directly supplied to the dehydrator without passing through the treatment process using the sedimentation tank. In this treatment method, thickened sludge from general wastewater adheres to the filter of the dehydrator, and since the thickened sludge contains a large amount of flocculant, it must be treated separately from the general wastewater system. When the concentrated waste liquid supplied to the dehydrator is dehydrated, the adhered sludge from the general wastewater functions as a physical and chemical filter, and the sludge components in the concentrated waste liquid are sufficiently removed and dewatered. be done. In this method, the concentrated waste liquid can simply be subjected to a dehydrator, so the amount of concentrated liquid waste that can be processed is essentially not limited.Furthermore, there is no need to add a flocculant to the concentrated liquid waste, and there is no need for special equipment. Since a conventional dehydrator can be used as is without installing any equipment, concentrated waste liquid can be treated at low cost, and the intended purpose can be achieved.
以下に本発明の濃厚廃液処理方法の望ましい実
施例を図面を参照して説明する。 Preferred embodiments of the concentrated waste liquid treatment method of the present invention will be described below with reference to the drawings.
図は本発明の一実施例に係る濃厚廃液処理方法
を実施するための装置の処理系統を示している。
プロセスからの一般排水Ａは、排水管１から原液
槽２に受け入れられ、原液ポンプ３で反応槽４へ
送られる。反応槽４において凝集剤Ｇが添加さ
れ、フロツク状となつた排水Ｂは沈澱槽５に送ら
れ、沈澱槽５内で上澄液Ｃと沈澱するスラツジＤ
とに分離される。上澄液Ｃはオーバーフローさ
れ、スラツジＤは沈澱槽５の底部から汚泥引き抜
きポンプ６によつて引き抜かれ、汚泥濃縮槽７に
供給される。汚泥濃縮槽７の濃縮された汚泥Ｅ
は、汚泥移送ポンプ８で脱水機９へ供給される。 The figure shows a processing system of an apparatus for implementing a concentrated waste liquid processing method according to an embodiment of the present invention.
General wastewater A from the process is received from a drain pipe 1 into a stock solution tank 2, and sent to a reaction tank 4 by a stock solution pump 3. The flocculant G is added in the reaction tank 4, and the floc-like wastewater B is sent to the sedimentation tank 5, where it is mixed with the supernatant C and the sludge D.
It is separated into The supernatant liquid C is overflowed, and the sludge D is drawn out from the bottom of the settling tank 5 by the sludge drawing pump 6 and supplied to the sludge thickening tank 7. Thickened sludge E in sludge thickening tank 7
is supplied to a dehydrator 9 by a sludge transfer pump 8.
一方、プロセスから発生する濃厚廃液Ｆは、濃
厚廃液槽１０に受けけ入れられ、注入定量ポンプ
１１で配管１２により汚泥移送配管１３に注入さ
れる。ポンプ８とポンプ１１は必要に応じて連動
運転されて汚泥Ｅと濃厚廃液Ｆの流量は一定比率
となる様調整され、配管１２，１３の合流部で汚
泥Ｅと濃厚廃液は混合され、脱水機９により脱水
処理される。 On the other hand, the concentrated waste liquid F generated from the process is received in the concentrated waste liquid tank 10, and is injected into the sludge transfer pipe 13 through the pipe 12 by the injection metering pump 11. Pump 8 and pump 11 are operated in conjunction with each other as necessary to adjust the flow rates of sludge E and concentrated waste liquid F to a constant ratio, and at the confluence of pipes 12 and 13, sludge E and concentrated waste liquid are mixed, and the dehydrator 9 for dehydration treatment.
なお、濃厚廃液Ｆは、汚泥Ｅと配管１２，１３
で混合されずに単独で脱水機９に送られてもよ
い。 In addition, the concentrated waste liquid F is mixed with the sludge E and the pipes 12 and 13.
may be sent to the dehydrator 9 alone without being mixed.
このような処理系統にあつては、濃厚廃液Ｆは
汚泥Ｅと同じ脱水機９によつて脱水処理される。
この脱水機９はたとえば筒状のフイルタの内部を
真空ポンプで引き、フイルタで濾過した廃水を取
出し、汚泥はフイルタ表面に付着させるものから
なる。脱水機９は、フイルタからなる脱水部の全
面に汚泥濃縮槽７における濃縮汚泥Ｅよりもさら
に濃縮された汚泥が付着した状態で濃厚廃液Ｆを
濾過しかつ脱水処理することになる。脱水機９内
に付着した汚泥は、真空脱水法（遠心脱水法、フ
イルタプレス法等であつてもよい）による脱水処
理に際し、濃厚廃液Ｆに対し物理的なフイルタと
しての機能を果し、しかも付着濃縮汚泥にはまだ
多量の凝集剤Ｇが含まれているので、化学的なフ
イルタとしての機能も果す。これら付着汚泥のフ
イルタ機能によつて、濃厚廃液Ｆのスラツジ成分
は脱水機９内にとどめられて脱水処理され、濃厚
廃液Ｆは確実に実用上問題のない程度に濾過され
る。 In such a treatment system, the concentrated waste liquid F is dehydrated by the same dehydrator 9 as the sludge E.
This dewatering machine 9 consists of, for example, a vacuum pump that draws the inside of a cylindrical filter, takes out wastewater filtered by the filter, and causes sludge to adhere to the surface of the filter. The dehydrator 9 filters and dehydrates the concentrated waste liquid F in a state in which sludge that is more concentrated than the concentrated sludge E in the sludge thickening tank 7 is attached to the entire surface of the dewatering section consisting of a filter. The sludge adhering to the inside of the dehydrator 9 functions as a physical filter for the concentrated waste liquid F during dehydration treatment using a vacuum dehydration method (which may also be a centrifugal dehydration method, a filter press method, etc.). Since the adhered thickened sludge still contains a large amount of flocculant G, it also functions as a chemical filter. Due to the filter function of the adhered sludge, the sludge component of the thick waste liquid F is retained in the dehydrator 9 and dehydrated, and the thick waste liquid F is reliably filtered to an extent that poses no problem in practical use.
以上の通りであるから、本発明の凝集沈澱排水
処理における濃厚廃液処理方法によるときは、通
常の凝集沈澱排水処理系の濃縮汚泥の脱水機に、
濃厚廃液を凝集沈澱処理することなく直接供給し
て脱水処理するようにしたので、脱水機内の付着
濃縮汚泥が濃厚廃液に対し物理的化学的フイルタ
としての機能を果し、十分な量の濃厚廃液を効果
的に処理することができるとともに、従来設備と
比べても特別な設備を設ける必要がないので安価
な濃厚廃液の処理を行なうことができるという効
果が得られる。 As described above, when using the concentrated waste liquid treatment method in the coagulation and sedimentation wastewater treatment of the present invention, it is possible to
Since the concentrated waste liquid is directly supplied and dehydrated without being subjected to coagulation and sedimentation treatment, the thickened sludge that adheres inside the dehydrator functions as a physical and chemical filter for the concentrated waste liquid, and a sufficient amount of concentrated waste liquid can be extracted. In addition to being able to effectively treat concentrated waste liquid, there is no need to provide special equipment compared to conventional equipment, so concentrated waste liquid can be treated at a low cost.
図は本発明の一実施例に係る濃厚廃液処理方法
を実施するための装置の系統図である。
２…原液槽、３…原液ポンプ、４…反応槽、５
…沈澱槽、６…汚泥引き抜きポンプ、７…汚泥濃
縮槽、８…汚泥移送ポンプ、９…脱水機、１０…
濃厚廃液槽、１１…注入定量ポンプ、１２，１３
…配管、Ａ…プロセスからの一般排水、Ｂ…凝集
剤が添加された排水、Ｃ…上澄液、Ｄ…スラツ
ジ、Ｅ…濃縮汚泥、Ｆ…濃厚廃液、Ｇ…凝集剤。
The figure is a system diagram of an apparatus for implementing a concentrated waste liquid treatment method according to an embodiment of the present invention. 2... Stock solution tank, 3... Stock solution pump, 4... Reaction tank, 5
...Sedimentation tank, 6...Sludge extraction pump, 7...Sludge thickening tank, 8...Sludge transfer pump, 9...Dehydrator, 10...
Concentrated waste liquid tank, 11... Injection metering pump, 12, 13
...Piping, A...General wastewater from the process, B...Drainage to which a flocculant has been added, C...Supernatant liquid, D...Sludge, E...Thickened sludge, F...Thickened waste liquid, G...Flocculant.
Claims (1)
ツジとに分離し、沈澱したスラツジを濃縮汚泥と
して引き抜き脱水機により脱水処理する工程から
成る凝集沈澱排水処理方法において、濃厚廃液を
前記沈澱槽による処理工程を通さずに前記脱水機
に直接供給して脱水処理することを特徴とする凝
集沈澱排水処理における濃厚廃液処理方法。1. In a coagulation-sedimentation wastewater treatment method comprising the steps of adding a flocculant to wastewater, separating it into supernatant liquid and sludge in a settling tank, and pulling out the precipitated sludge as thickened sludge and dewatering it in a dehydrator, A method for treating concentrated waste liquid in coagulation-sedimentation wastewater treatment, characterized in that the concentrated waste liquid is directly supplied to the dehydrator for dehydration treatment without passing through a treatment process using a tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135206A JPS5926188A (en) | 1982-08-04 | 1982-08-04 | Treatment of conc. liquid waste in flocculation-precipitation waste water disposal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57135206A JPS5926188A (en) | 1982-08-04 | 1982-08-04 | Treatment of conc. liquid waste in flocculation-precipitation waste water disposal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5926188A JPS5926188A (en) | 1984-02-10 |
| JPS6311077B2 true JPS6311077B2 (en) | 1988-03-11 |
Family
ID=15146326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57135206A Granted JPS5926188A (en) | 1982-08-04 | 1982-08-04 | Treatment of conc. liquid waste in flocculation-precipitation waste water disposal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5926188A (en) |
-
1982
- 1982-08-04 JP JP57135206A patent/JPS5926188A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5926188A (en) | 1984-02-10 |
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