JPS63175687A - Treatment method for organic contaminated water containing phosphoric acid - Google Patents
Treatment method for organic contaminated water containing phosphoric acidInfo
- Publication number
- JPS63175687A JPS63175687A JP62004895A JP489587A JPS63175687A JP S63175687 A JPS63175687 A JP S63175687A JP 62004895 A JP62004895 A JP 62004895A JP 489587 A JP489587 A JP 489587A JP S63175687 A JPS63175687 A JP S63175687A
- Authority
- JP
- Japan
- Prior art keywords
- membrane
- biological treatment
- slurry
- phosphoric acid
- active sludge
- 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
- 238000000034 method Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title abstract 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 title abstract 3
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 3
- 239000003463 adsorbent Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 15
- 239000002699 waste material Substances 0.000 claims description 15
- 239000002351 wastewater Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229940085991 phosphate ion Drugs 0.000 claims description 5
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 2
- 230000016615 flocculation Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000000108 ultra-filtration Methods 0.000 claims 1
- 239000010802 sludge Substances 0.000 abstract description 17
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- 238000000926 separation method Methods 0.000 abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 239000010800 human waste Substances 0.000 abstract description 8
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010797 grey water Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000012492 regenerant Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 210000002700 urine Anatomy 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
- Activated Sludge Processes (AREA)
- Water Treatment By Sorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、し尿系汚水、下水、各種廃水等のリン酸イオ
ン（ＰＯ，’−）を含有する有機性汚水の処理方法に関
し、特に生物処理工程と膜分離工程を備えた処理方法の
改良に関するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for treating organic wastewater containing phosphate ions (PO,'-), such as human waste water, sewage, and various wastewaters, and particularly to a method for treating organic wastewater containing phosphate ions (PO,'-). This invention relates to an improvement in a treatment method that includes a treatment step and a membrane separation step.
従来、有機性汚水の処理には活性汚泥法等の生物処理法
が多用され、活性汚泥法においては活性汚泥を処理水と
分離するために沈殿池が設置されてきた。しかし、最近
では、沈殿池を設置せずに、直接活性汚泥を限外？濾過
（ＵＦ）膜で膜分離するという方法が特に中水道、し尿
処理の分野で実用化されるに至り、ＰＯ，’−を含有す
る有機性汚水の処理として、汚水を生物処理したのちＵ
Ｆ膜で膜分離し、その膜透過水を活性炭吸着処理後水和
酸化ジルコニウムによるＰＯ４３−吸着処理を行うもの
であった（昭和６１年２月全国都市清掃会議研究発表会
要旨集参照）。Conventionally, biological treatment methods such as activated sludge methods have been frequently used to treat organic sewage, and in activated sludge methods, settling tanks have been installed to separate activated sludge from treated water. However, recently, it is possible to use activated sludge directly without installing a settling tank? The method of membrane separation using a filtration (UF) membrane has come into practical use, especially in the field of gray water and human waste treatment, and as a treatment for organic sewage containing PO,'-, after biologically treating the sewage, U
The membrane separation was carried out using an F membrane, and the permeated water was treated with activated carbon adsorption treatment, followed by PO43-adsorption treatment with hydrated zirconium oxide (see abstracts of the February 1988 National Urban Cleaning Conference Research Presentation).
しかしながら、このようなプロセスには次のような問題
点が未解決であり、理想的プロセスにはほど遠いもので
あった。However, the following problems remain unresolved in such a process, and it is far from an ideal process.
■ ＵＦ膜はＰＯ４３−を１００％透過してしまうので
、ＵＦ膜透過水に対してＰＯ４３−吸着剤による吸着除
去工程を設けなければならないが、吸着除去すべきＰＯ
４トが高濃度（し尿の場合は５００〜６００＠ｚ ／
１ ａｓＰＯａになる）であると、ｐｏ、’−吸着剤は
すぐに飽和吸着量に達してしまう。この結果、頻繁な再
生操作を必要とし、維持管理が面倒でかつ運転コストが
高額になっていた。■ Since the UF membrane transmits 100% of PO43-, it is necessary to perform an adsorption removal process using a PO43- adsorbent for the water that permeates through the UF membrane.
4 to high concentration (for human waste, 500 to 600＠z /
1 asPOa), the po,'-adsorbent quickly reaches the saturated adsorption amount. As a result, frequent regeneration operations are required, maintenance is troublesome, and operating costs are high.
■ しかも、水和酸化ジルコニウムに吸着されたＰＯ４
３−を離脱させて再生するために、ＭａＯＨ溶液と接触
させているが、この結果Ｎａ５ＰＯ４を多量に含んだ再
生廃液が多量に発生し、この再生廃液からＮａ３ＰＯ４
結晶を晶析させて遠心分離機等で分離して系外へ排出さ
せるための操作は煩雑であり、回収したＮａ５ＰＯａが
販売できるという保証もなかった。■ Moreover, PO4 adsorbed on hydrated zirconium oxide
In order to remove and regenerate 3-, it is brought into contact with a MaOH solution, but as a result, a large amount of regenerated waste liquid containing a large amount of Na5PO4 is generated, and from this regenerated waste liquid Na3PO4
The operations for crystallizing the crystals, separating them using a centrifuge, etc., and discharging them from the system were complicated, and there was no guarantee that the recovered Na5POa could be sold.
本発明は、このような従来プロセスの問題点を根本的に
解決することを課題としており、特に、
（イ＞ ｐｏ、’−吸着剤の再生頻度を著しく少なくす
ること。The object of the present invention is to fundamentally solve the problems of such conventional processes, and in particular, to significantly reduce the regeneration frequency of (i>po,'-adsorbent).
（ロ） ＰＯａ”−吸着剤の再生廃液の処理を、晶析操
作などの特別な操作を行わずに合理的に解決する。(b) To rationally solve the treatment of regenerated waste liquid of POa''-adsorbent without performing special operations such as crystallization operations.
こと等を解決課題としている。These are the issues to be solved.
本発明は、リン酸イオンを含有する有機性汚水を生物処
理し、流出するスラリをアルミニウム系又は鉄系凝集剤
による凝集反応を行わしめたのち限外Ｕ３過膜によって
濃縮スラリと膜透過水とに分離し、該膜透過水をリン酸
イオン吸着剤と接触せしめてリン酸イオンを吸着除去し
、さらに前記リン酸イオン吸着剤をアルカリ剤で再生し
た再生廃液を前記生物処理系内に供給することを特徴と
するリン酸イオンを含有する有機性汚水の処理方法を提
供するものである。The present invention biologically treats organic wastewater containing phosphate ions, subjects the flowing slurry to a flocculation reaction using an aluminum-based or iron-based flocculant, and then separates the concentrated slurry and membrane-permeated water using an ultra-U3 filtration membrane. The membrane-permeated water is brought into contact with a phosphate ion adsorbent to adsorb and remove phosphate ions, and the regenerated waste liquid obtained by regenerating the phosphate ion adsorbent with an alkaline agent is supplied to the biological treatment system. The present invention provides a method for treating organic wastewater containing phosphate ions, which is characterized by the following.
以下に本発明の作用を、一実施態様を示す図面を参照し
ながら、リン酸イオンを含有する有機性汚水の典型例で
あるし尿を例にとりあげて説明す図示しないスクリーン
等でし渣が除去された除渣し尿１を活性汚泥法などを採
用した生物処理工程２へ導くが、ＢＯＤ成分と同時に窒
素骨を除去するためには、生物処理工程２としては生物
学的硝化脱窒素工程とする。この場合の生物学的硝化脱
窒素工程における活性汚泥のＭＬＳＳは、１ｓｏｏｏ〜
２００００■／ｌの範囲に設定し、し尿温留日数を７〜
９日とするのが好ましい。The effects of the present invention will be explained below using human waste, which is a typical example of organic sewage containing phosphate ions, as an example, with reference to drawings showing one embodiment of the invention. The removed human waste 1 is led to a biological treatment process 2 that employs an activated sludge method, etc. However, in order to remove nitrogen bones at the same time as BOD components, the biological treatment process 2 is a biological nitrification and denitrification process. . In this case, the MLSS of activated sludge in the biological nitrification and denitrification process is 1sooo~
Set to a range of 20,000 ■/l, and keep human urine warm for 7 to 7 days.
It is preferable to set it as 9 days.
しかして、生物処理工程２から流出する活性汚泥スラリ
３に対し、硫酸アルミニウム、ポリ塩化アルミニウムな
どのＡＡ系又は塩化第２鉄、ポリ硫酸鉄などのＰｅ系の
凝集剤４を注入することによって、活性汚泥スラリ３中
の溶解性ＰＯ，’−の大部分を凝集させる。このとき、
溶解性のＣＯＤ成分（難生物分解性）の一部も共に凝集
される。なお、凝集剤４の注入ポイントは、生物処理工
程２、または後述するＵＦ膜分離工程５で分離された濃
縮スラリ７の生物処理工程２への返送スラリ１５の経路
であっても良い。By injecting an AA-based flocculant 4 such as aluminum sulfate or polyaluminum chloride or a Pe-based flocculant 4 such as ferric chloride or polyferric sulfate into the activated sludge slurry 3 flowing out from the biological treatment process 2, Most of the soluble PO,'- in the activated sludge slurry 3 is coagulated. At this time,
Some of the soluble COD components (hardly biodegradable) are also aggregated together. In addition, the injection point of the flocculant 4 may be the biological treatment process 2 or the route of the return slurry 15 to the biological treatment process 2 of the concentrated slurry 7 separated in the UF membrane separation process 5 described later.
次に、凝集剤４の注入を受けた活性汚泥スラリ３は、Ｕ
Ｆ膜（分画分子量以下のチューブラ型又はプレート型が
好適である）分離工程５にポンプ圧入され、低ＰＯａ”
６度でＳＳゼロの清澄な膜透過水６と濃縮スラリ７とに
分離される。この膜透過水６は、ＰＯ１３−が数ｌＯ■
／ｌ以下でＳＳがゼロであるが、ＵＦ膜の分画分子量以
下の溶解性ＣＯＤ、色度が残留している場合が多く、活
性炭吸着塔８において膜透過水６中の溶解性ＣＯＤ、色
度などの有機物を吸着除去し、無色透明の処理水９を得
る。Next, the activated sludge slurry 3 that has been injected with the flocculant 4 is
F membrane (preferably a tubular type or plate type with a molecular weight below the cut-off molecular weight) is pumped into the separation step 5, and a low POa”
At 6 degrees, it is separated into clear membrane permeated water 6 with zero SS and concentrated slurry 7. This membrane-permeated water 6 contains several liters of PO13-
/l or less, SS is zero, but in many cases, soluble COD and chromaticity below the molecular weight cutoff of the UF membrane remain. Organic matter such as alcohol is adsorbed and removed to obtain colorless and transparent treated water 9.
活性炭吸着塔８で得られた処理水９は、ＰＯ４ｆｆ−以
外の汚濁成分は極めて低濃度であるが、ｐｏ、’−濃度
が放流規制値（し尿処理では通常１■／１以下ａｓＰ）
以上となっている場合が多いため、水和酸化鉄、骨炭、
水和酸化チタン、水和酸化ジルコニウム、活性アルミナ
などの公知のＰ０４′−吸着剤を充填したＰＯ４３−吸
着塔１０に供給され、処理水９中の低濃度のｐｏ、’−
を吸着除去し、放流水１１を得る。The treated water 9 obtained from the activated carbon adsorption tower 8 has an extremely low concentration of pollutants other than PO4ff-, but the po,'- concentration is below the discharge regulation value (normally 1/1 or less asP in human waste treatment).
In many cases, it is more than hydrated iron oxide, bone charcoal,
The low concentration of po,'- in the treated water 9 is supplied to the PO43-adsorption tower 10 filled with known P04'-adsorbents such as hydrated titanium oxide, hydrated zirconium oxide, and activated alumina.
is adsorbed and removed to obtain effluent water 11.
ところで従来プロセスでは、ＵＦ膜分離工程５以前で大
部分のｐｏ、’−を除去することなく、最終段に設けら
れているＰＯ４３−吸着塔において溶解性ＰＯ−−のす
べてを除去しなければならないという不合理性が存在す
るが、本発明ではｉｔのｐｏ、−のみを吸着剤によりポ
リッシング除去する構成としたので、従来のような顧繁
な再生を全く必要とせず、再生頻度は従来プロセスに比
べて１７２０以下と大幅に減少する。By the way, in the conventional process, most of the po,'- is not removed before the UF membrane separation step 5, and all of the soluble PO-- has to be removed in the PO43- adsorption tower provided at the final stage. However, in the present invention, only the po and - of it are removed by polishing using an adsorbent, so there is no need for frequent regeneration as in the conventional process, and the regeneration frequency is lower than that of the conventional process. This is a significant decrease to 1,720 or less.
しかるに、ＰＯ４’−吸着塔１０に対して長期間通水を
続けると、放流水１１にＰＯ４’−のリークが始まるの
で、放流水１１のＰＯ，’−濃度が設定値に達した時点
で通水を停止し、ＮａＯＨ，Ｍｇ（０１（）ｘ 、ＮＨ
４ＯＨなどのアルカリによる再生剤１２をｐｏ、”−吸
着塔１０に供給し、ＰＯ４３−吸着剤に捕捉されている
Ｐ０４″−を脱離させ、ＰＯ４３−吸着剤を再生する。However, if water continues to flow through the PO4'- adsorption tower 10 for a long period of time, PO4'- will begin to leak into the effluent water 11, so when the PO,'- concentration in the effluent water 11 reaches the set value, the water flow will start. Stop the water, NaOH, Mg(01()x, NH
A regenerating agent 12 based on an alkali such as 4OH is supplied to the po,''-adsorption tower 10 to desorb P04''- trapped in the PO43-adsorbent and regenerate the PO43-adsorbent.
この結果、ＰＯ４３−を含んだアルカリ性の再生廃液１
３が発生する。この再生廃液１３は、従来プロセスでは
晶析工程に供給してＮａ５ＰＯｎの結晶を析出せしめて
、結晶を遠心分離機で回収するという、煩雑な操作を行
って処分していたのであるが、本発明では次のような新
規な態様によって、従来のこのような操作を完全に不要
にする。As a result, alkaline recycled waste liquid 1 containing PO43-
3 occurs. In the conventional process, this regenerated waste liquid 13 was disposed of by a complicated operation of supplying it to a crystallization step to precipitate Na5POn crystals and collecting the crystals with a centrifuge, but in the present invention. Now, the following new aspect completely eliminates the need for such conventional operations.
すなわち、再生廃液１３を長期間つまり次の再生時にま
で少量ずつ、ポンプ１４によって生物処理工程２にリサ
イクルさせる。例えば図示例のように、ＵＦ膜分離工程
５からの濃縮スラリ７の大部分である生物処理工程２へ
の返送スラリ１５に少量ずつ再生廃１１３を注入すると
、再生廃液１３中のＰＯ４１−は生物処理工程２中の大
量の液によって希釈され、一部のＰＯ４３−は活性汚泥
に取り込まれたのち、最終的に凝集剤４によってＡ ｔ
ａｒ ＰＯａ、ＦｅＰＯａフロックになり、ＵＦ膜分離
工程５において固液分離される。また、再生廃液１３中
のアルカリ分は、凝集剤４の注入によるｐＨ低下を防ぐ
のに利用される。このようにして、ＰＯ４″−吸着剤の
再生廃液１３の処分が、特別の操作を必要とすることな
く、極めて容易となり、しかも処分費用も不要となる。That is, the regenerated waste liquid 13 is recycled to the biological treatment process 2 by the pump 14 little by little over a long period of time, that is, until the next regeneration. For example, as shown in the illustrated example, when the recycled waste 113 is injected little by little into the slurry 15 returned to the biological treatment process 2, which is the majority of the concentrated slurry 7 from the UF membrane separation process 5, the PO41- in the recycled waste liquid 13 is After being diluted by a large amount of liquid in treatment step 2, some PO43- is taken into activated sludge, and finally A t
ar POa and FePOa flocs are formed, and solid-liquid separation is performed in the UF membrane separation step 5. Further, the alkaline content in the recycled waste liquid 13 is used to prevent the pH from decreasing due to the injection of the flocculant 4. In this way, the disposal of the regenerated waste liquid 13 of the PO4''-adsorbent becomes extremely easy without the need for special operations, and also eliminates disposal costs.
図中、１６はＵＦ膜分離工程５からの濃縮スラリ７の返
送スラリ１５分を差し引いた残りの余剰スラリであって
、汚泥脱水機１７によって脱水され、脱水ケーキ１８と
なって系外に排出される。In the figure, 16 is the surplus slurry remaining after subtracting 15 minutes of the returned slurry from the concentrated slurry 7 from the UF membrane separation process 5, which is dehydrated by the sludge dehydrator 17, becomes a dehydrated cake 18, and is discharged from the system. Ru.
以上述べたように本発明は、有機性汚水中の系内でＩＩ
系又はＦｅ系の凝集剤によって凝集除去したのち、ＵＦ
膜透過水中に微量残留するＰＯ４トを吸着除去するとい
う技術的思想、およびｐｏ、’−いう技術思想に基づく
新規なプロセスであって、次のような極めて有益な効果
を存するものである。As described above, the present invention provides a system for treating organic sewage.
After removing the coagulation using a Fe-based or Fe-based coagulant, the UF
This is a novel process based on the technical idea of adsorbing and removing a small amount of PO4 remaining in membrane-permeated water, and the technical idea of po,'-, and has the following extremely beneficial effects.
■ ｐｏ、’−吸着剤の再生頻度を著しく少なくするこ
とができる。(2) The frequency of regeneration of the po,'-adsorbent can be significantly reduced.
■ この結果、Ｐ０４ト吸着剤再生用のアルカリ所要量
も激減し、維持管理費を大幅に節減することができる。(2) As a result, the amount of alkali required for regenerating the P04 adsorbent is drastically reduced, and maintenance costs can be reduced significantly.
■ ｐｏ、ト吸着剤の再生廃液の処分に何等特別な操作
を必要とせず、しかも維持管理も容易となる。■ No special operations are required to dispose of the regenerated waste liquid of the PO and TO adsorbents, and maintenance is also easy.
■ ｐｏ、３″吸着剖の再生廃液中に高濃度に含まれる
アルカリ分を凝集剤注入によるｐＨ低下の防止に有効利
用することができる。(2) The high concentration of alkali contained in the regenerated waste liquid of PO, 3'' adsorption can be effectively used to prevent pH decrease due to flocculant injection.
図面は本発明の一実施態様を示す系統説明間である。
１・・・除渣し尿、２・・・生物処理工程、３・・・活
性汚泥スラリ、４・・・凝集剤、５・・・ＵＦ膜分離工
程、６・・・膜透過水、７・・・濃縮スラリ、８・・・
活性炭吸着塔、９・・・処理水、１０・・・リン酸イオ
ン吸着塔、１１・・・放流水、１２・・・再生剤、１３
・・・再生廃液、１４・・・ポンプ、１５・・・返送ス
ラリ、１６・・・余剰スラリ、１７・・・汚泥脱水機、
１８・・・脱水ケーキ。The drawings are a schematic diagram illustrating one embodiment of the invention. 1... Residue human waste, 2... Biological treatment process, 3... Activated sludge slurry, 4... Flocculant, 5... UF membrane separation process, 6... Membrane permeated water, 7. ...Concentrated slurry, 8...
Activated carbon adsorption tower, 9... Treated water, 10... Phosphate ion adsorption tower, 11... Effluent water, 12... Regenerant, 13
... Recycled waste liquid, 14 ... Pump, 15 ... Return slurry, 16 ... Surplus slurry, 17 ... Sludge dehydrator,
18...Dehydrated cake.
Claims (2)
、流出するスラリをアルミニウム系又は鉄系凝集剤によ
る凝集反応を行わしめたのち限外ろ過膜によって濃縮ス
ラリと膜透過水とに分離し、該膜透過水をリン酸イオン
吸着剤と接触せしめてリン酸イオンを吸着除去し、さら
に前記リン酸イオン吸着剤をアルカリ剤で再生した再生
廃液を前記生物処理系内に供給することを特徴とするリ
ン酸イオンを含有する有機性汚水の処理方法。(1) Organic wastewater containing phosphate ions is treated biologically, the slurry flowing out is subjected to a flocculation reaction using an aluminum-based or iron-based flocculant, and then separated into concentrated slurry and membrane-permeated water using an ultrafiltration membrane. and bringing the permeated water through the membrane into contact with a phosphate ion adsorbent to adsorb and remove phosphate ions, further regenerating the phosphate ion adsorbent with an alkaline agent and supplying the regenerated waste liquid to the biological treatment system. A method for treating organic wastewater containing phosphate ions.
請求の範囲第１項記載のリン酸イオンを含有する有機性
汚水の処理方法。(2) The method for treating organic wastewater containing phosphate ions according to claim 1, wherein the biological treatment is a biological nitrification and denitrification method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62004895A JPS63175687A (en) | 1987-01-14 | 1987-01-14 | Treatment method for organic contaminated water containing phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62004895A JPS63175687A (en) | 1987-01-14 | 1987-01-14 | Treatment method for organic contaminated water containing phosphoric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63175687A true JPS63175687A (en) | 1988-07-20 |
| JPH0437755B2 JPH0437755B2 (en) | 1992-06-22 |
Family
ID=11596404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62004895A Granted JPS63175687A (en) | 1987-01-14 | 1987-01-14 | Treatment method for organic contaminated water containing phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63175687A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242397A (en) * | 1987-03-31 | 1988-10-07 | Kubota Ltd | Treatment of waste water |
| JPH02265628A (en) * | 1989-04-05 | 1990-10-30 | Kurita Water Ind Ltd | Membranous separating process |
| JPH02298398A (en) * | 1989-05-10 | 1990-12-10 | Kubota Corp | Sewage treatment apparatus |
| US6406629B1 (en) | 1999-07-20 | 2002-06-18 | Zenon Environmental Inc. | Biological process for removing phosphorous involving a membrane filter |
| US6485645B1 (en) | 1999-07-20 | 2002-11-26 | Zenon Environmental Inc | Biological process for removing phosphorus involving a membrane filter |
| JP2010214260A (en) * | 2009-03-13 | 2010-09-30 | Toshiba Corp | Water treatment apparatus |
-
1987
- 1987-01-14 JP JP62004895A patent/JPS63175687A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63242397A (en) * | 1987-03-31 | 1988-10-07 | Kubota Ltd | Treatment of waste water |
| JPH02265628A (en) * | 1989-04-05 | 1990-10-30 | Kurita Water Ind Ltd | Membranous separating process |
| JPH02298398A (en) * | 1989-05-10 | 1990-12-10 | Kubota Corp | Sewage treatment apparatus |
| US6406629B1 (en) | 1999-07-20 | 2002-06-18 | Zenon Environmental Inc. | Biological process for removing phosphorous involving a membrane filter |
| US6485645B1 (en) | 1999-07-20 | 2002-11-26 | Zenon Environmental Inc | Biological process for removing phosphorus involving a membrane filter |
| JP2010214260A (en) * | 2009-03-13 | 2010-09-30 | Toshiba Corp | Water treatment apparatus |
| JP4703737B2 (en) * | 2009-03-13 | 2011-06-15 | 株式会社東芝 | Water treatment equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0437755B2 (en) | 1992-06-22 |
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