JPS59206092A - Wastewater treatment method - Google Patents
Wastewater treatment methodInfo
- Publication number
- JPS59206092A JPS59206092A JP58081112A JP8111283A JPS59206092A JP S59206092 A JPS59206092 A JP S59206092A JP 58081112 A JP58081112 A JP 58081112A JP 8111283 A JP8111283 A JP 8111283A JP S59206092 A JPS59206092 A JP S59206092A
- Authority
- JP
- Japan
- Prior art keywords
- phosphorus
- tank
- sludge
- physicochemical
- treatment
- 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.)
- Pending
Links
- 238000004065 wastewater treatment Methods 0.000 title claims 2
- 238000000034 method Methods 0.000 claims description 35
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 32
- 229910052698 phosphorus Inorganic materials 0.000 claims description 32
- 239000011574 phosphorus Substances 0.000 claims description 32
- 239000010802 sludge Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 230000008719 thickening Effects 0.000 claims description 10
- 239000002351 wastewater Substances 0.000 claims description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 7
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 7
- 239000000920 calcium hydroxide Substances 0.000 claims description 7
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000002505 iron Chemical class 0.000 claims description 2
- 239000002367 phosphate rock Substances 0.000 claims description 2
- 210000000988 bone and bone Anatomy 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 7
- 230000029087 digestion Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- VTEIFHQUZWABDE-UHFFFAOYSA-N 2-(2,5-dimethoxy-4-methylphenyl)-2-methoxyethanamine Chemical compound COC(CN)C1=CC(OC)=C(C)C=C1OC VTEIFHQUZWABDE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-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
- 239000011575 calcium Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、リンを含む有機性廃水を微生物により処理し
てＢＯＤ、窒素化合物及びリンを除去し、浄化する方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for purifying organic wastewater containing phosphorus by treating it with microorganisms to remove BOD, nitrogen compounds and phosphorus.
最近、南アフリカのバーナートやニコルスによって生物
学的脱リンプロセスが発表され、ＢＯＤ成分及び窒素化
合物の除去とリン除去を同時に行う方法として注目され
ている。しかし、この方法では、リンを豊富に含む余剰
汚泥が発生し、この汚泥は嫌気性状態におかれると、リ
ンを再放出してしまうという欠点がある。汚泥濃縮槽上
澄み水及び脱水工程からの排水は通常の処理場では初沈
工程に返送混合されるので、その液中に放出されたリン
が含まれていると、リンは処理系内を循環してしまい、
結局処理効率の低下及び処理水質の悪化を招くことにな
る。特に、余剰汚泥の処理工程に嫌気性消化が含まれて
いる場合には、嫌気処理工程で余剰汚泥からリンが放出
されてしまい、リンの除去処理は困難になる。Recently, a biological dephosphorization process was published by Bernert and Nichols in South Africa, and it is attracting attention as a method for simultaneously removing BOD components and nitrogen compounds and removing phosphorus. However, this method has the disadvantage that surplus sludge rich in phosphorus is generated, and when this sludge is placed in an anaerobic state, it re-releases phosphorus. In normal treatment plants, the supernatant water from the sludge thickening tank and the wastewater from the dewatering process are returned to the initial sedimentation process and mixed, so if the liquid contains phosphorus, the phosphorus will circulate within the treatment system. I ended up
Eventually, this will lead to a decrease in treatment efficiency and a deterioration in the quality of the treated water. Particularly, when the surplus sludge treatment process includes anaerobic digestion, phosphorus is released from the surplus sludge in the anaerobic treatment process, making it difficult to remove phosphorus.
本発明は、前記の従来技術の欠点を解決し、廃水中のリ
ンを生物学的処理により効率良く除去する方法を提供す
ることを目的とする。The present invention aims to solve the above-mentioned drawbacks of the prior art and to provide a method for efficiently removing phosphorus from wastewater by biological treatment.
この目的は、本発明によれば、余剰汚泥濃縮槽溢流水及
び／又は汚泥脱水工程からの排水を物理化学的リン除去
手段により脱リン処理することによって達成される。According to the present invention, this object is achieved by dephosphorizing the excess sludge thickening tank overflow water and/or the waste water from the sludge dewatering process using physicochemical phosphorus removal means.
詳述すれば、本発明方法ではリンを含む有機性廃水を嫌
気工程及び好気工程により脱リン、脱窒及びＢＯＤ除去
を行い、生じた余剰汚泥の濃縮工程からの溢流水及び／
又は汚泥脱水工程からの排水を物理化学的手段により脱
リン処理した後に、最初沈根池又は嫌気槽に循環する。Specifically, in the method of the present invention, organic wastewater containing phosphorus is dephosphorized, denitrified, and BOD removed through an anaerobic process and an aerobic process, and overflow water and/or
Alternatively, the wastewater from the sludge dewatering process is dephosphorized by physicochemical means and then first circulated to the sinking basin or anaerobic tank.
本発明方法に使用する物理化学的リン除去手段は、例え
ばアルミニウム塩、鉄塩、消石灰等のリン凝集剤を添加
する凝集沈澱、リン鉱石や骨炭を用いる晶析法、担体表
面にカルシウムヒドロキシアパタイトとして晶出させる
方法等、富用の方法であってよい。The physicochemical phosphorus removal methods used in the method of the present invention include, for example, coagulation-sedimentation in which a phosphorus flocculant such as aluminum salt, iron salt, or slaked lime is added, crystallization using phosphate rock or bone charcoal, and calcium hydroxyapatite on the surface of a carrier. Any method may be used, such as crystallization.
次に、図面に基づいて本発明を詳述する。Next, the present invention will be explained in detail based on the drawings.
図面は本発明方法の一実施態様を示すフローシート中の
浮遊固形物を除去された後、嫌気槽２に導入され、ここ
で返送汚泥と接触混合される。嫌気槽２内でば、活性汚
泥は流入水中の有機物を吸収するとともに、リンを放出
する。混合液は次に好気槽３へ導入され、ここで有機物
の酸化とリンの活性汚泥への蓄積が行われる。このよう
にしてリンを多量に蓄積した汚泥は最終沈澱池４で固液
分離され、一部は返送汚泥として嫌気槽２へ送られ、残
りは余剰汚泥として引き抜かれ、汚泥濃縮槽５へ送られ
る。この濃縮槽からの溢流水と脱水機６からの排水は調
整槽７でｐｌ＋を調整され、物理化学的リン除去槽１０
で脱リン処理された後、最初沈戯池１へ戻される。汚泥
濃縮槽５で′ａ縮された汚泥は、嫌気性消化槽９で消化
された後、汚泥貯留槽９に貯留され、更に脱水機６で脱
水される。The figure shows one embodiment of the method of the present invention. After the suspended solids in the flow sheet are removed, it is introduced into an anaerobic tank 2, where it is contacted and mixed with returned sludge. In the anaerobic tank 2, the activated sludge absorbs organic matter in the inflow water and releases phosphorus. The mixed liquid is then introduced into the aerobic tank 3, where organic matter is oxidized and phosphorus is accumulated in activated sludge. The sludge that has accumulated a large amount of phosphorus in this way is separated into solid and liquid in the final settling tank 4, and part of it is sent to the anaerobic tank 2 as return sludge, and the rest is pulled out as surplus sludge and sent to the sludge thickening tank 5. . The overflow water from the concentration tank and the waste water from the dehydrator 6 have their PL+ adjusted in the adjustment tank 7, and the physicochemical phosphorus removal tank 10
After being subjected to dephosphorization treatment, it is first returned to Shengi Pond 1. The sludge reduced in the sludge thickening tank 5 is digested in an anaerobic digestion tank 9, stored in a sludge storage tank 9, and further dewatered in a dehydrator 6.
このように、本発明方法によれば、余剰汚泥の濃縮工程
及び嫌気消化工程において余剰汚泥から放出されたリン
を除去した１多に、濃縮槽溢流水及び／又は脱離液を最
初沈澱池に循環するので、生物学的脱リンを常に効率良
く行うことができ、長時間連続運転しても常に水質の良
好な処理水を得ることができる。従って、脱リン処理後
の水は処理水として放流することもできる。As described above, according to the method of the present invention, the overflow water of the thickening tank and/or the desorbed liquid is first sent to the settling tank after removing phosphorus released from the surplus sludge in the thickening process and the anaerobic digestion process. Since it circulates, biological dephosphorization can always be performed efficiently, and treated water of good quality can always be obtained even during long-term continuous operation. Therefore, the water after dephosphorization treatment can be discharged as treated water.
更妃、本発明方法によれば、物理化学的脱リン処理をう
ける水の量は、原水量の２．５〜３％であるから、下水
の全量を物理化学的脱リン処理する場合より処理設備の
容積及び添加薬品量を著しく節約することができる。リ
ン凝集剤として硫酸ばん土や塩化第二鉄を使用する場合
には、リンとのモル比で添加量を決定するので、下水全
量を凝集沈澱する場合と比較して添加薬品量の低減はあ
まり期待できないが、凝集沈澱設備の容積は著しく縮小
することができる。一方、消石灰を使用する場合には、
ｐＨを１０．５以上にするために、リンとのモル比以上
に添加するので、液中のリン濃度の高くなる本発明方法
では添加薬剤量も著しく低減することができる。According to Sarahi, according to the method of the present invention, the amount of water subjected to physicochemical dephosphorization treatment is 2.5 to 3% of the raw water amount, so the treatment is lower than when the entire amount of sewage is subjected to physicochemical dephosphorization treatment. Significant savings can be made in the volume of equipment and the amount of added chemicals. When using clay sulfate or ferric chloride as a phosphorus flocculant, the amount added is determined by the molar ratio to phosphorus, so the amount of added chemicals is not much reduced compared to when the entire amount of sewage is coagulated and precipitated. Although not expected, the volume of the coagulation-sedimentation equipment can be significantly reduced. On the other hand, when using slaked lime,
In order to raise the pH to 10.5 or higher, it is added at a molar ratio higher than that of phosphorus, so in the method of the present invention, which increases the phosphorus concentration in the liquid, the amount of added chemicals can also be significantly reduced.
図面に示した実施態様では、脱リン処理後の循環水を最
初沈澱池へ戻したが、嫌気槽２へ戻してもよい。In the embodiment shown in the drawings, the circulating water after dephosphorization treatment is initially returned to the sedimentation tank, but it may also be returned to the anaerobic tank 2.
また、汚泥濃縮工程が遠心分離等、リン放出のない条件
下に行われる場合には、溢流水の脱リンを行わず、汚泥
脱水工程からの排水だけを脱リン処理してもよい。濃縮
槽溢流水の脱リン処理は、重力濃縮法等、嫌気状態にな
る濃縮法の場合に有益である。Further, when the sludge concentration step is performed under conditions such as centrifugation that does not release phosphorus, only the waste water from the sludge dewatering step may be dephosphorized without dephosphorizing the overflow water. Dephosphorization treatment of overflow water from a concentration tank is useful in concentration methods that result in anaerobic conditions, such as gravity concentration methods.
次に実施例に基づいて本発明を詳述するが、本発明はこ
れに限定されるものではない。Next, the present invention will be described in detail based on Examples, but the present invention is not limited thereto.
実施例
ＢＯＤ１１０〜１５１■／ＩＴ−Ｐ２．２５〜３、２６
ｍｇ／ ｌ及びＰＯ４Ｐ １．０ ］ 〜２．１３ｍ
ｙ／ｐの下水を原水として図面に示したフローシートに
より処理した。Example BOD110-151■/IT-P2.25-3, 26
mg/l and PO4P 1.0] ~2.13m
Y/P sewage was treated as raw water according to the flow sheet shown in the drawing.
嫌気槽滞留時間を１．２時間、好気槽滞留時間を２．４
時間として生物学的脱リンプロセスを行い、最終沈澱池
から排出される余剰汚泥と、原水の流入している処理場
の初沈汚泥を混合し、滞留時間１２時間の濃縮槽で濃縮
した。濃縮汚泥を嫌気性消化した後脱水し、脱離液と前
記濃縮槽の上澄み液とを調整槽で混合する。この混合液
（ＰＯ４−Ｐ２１〜６８■／ｌ）にＣａ （ＯＨ） ２
をｐＨ１０，５〜１１．０になるように添加し、凝集沈
澱処理を行った。この処理水中のＰＯ４ｐｉ度は０．５
〜１．５■／ρであった。Anaerobic tank retention time is 1.2 hours, aerobic tank retention time is 2.4 hours.
A biological dephosphorization process was carried out over time, and the excess sludge discharged from the final settling tank was mixed with the initial settling sludge from the treatment plant into which raw water was flowing, and the mixture was concentrated in a thickening tank with a residence time of 12 hours. The concentrated sludge is anaerobically digested and then dehydrated, and the desorbed liquid and the supernatant liquid from the thickening tank are mixed in a regulating tank. Ca (OH) 2 was added to this mixed solution (PO4-P21~68■/l).
was added to adjust the pH to 10.5 to 11.0, and a coagulation and precipitation treatment was performed. The PO4pi degree in this treated water is 0.5
It was ~1.5■/ρ.
この処理水を生物学的脱リンプロセスの嫌気槽に返送し
た。そのときの生物学的脱リンプロセスの処理水の水質
を測定したところ、下記のとおりであった。This treated water was returned to the anaerobic tank of the biological dephosphorization process. The quality of the water treated in the biological dephosphorization process at that time was measured, and the results were as follows.
処理水水質：
ＢＯＤ ４．６〜１０．７ｍｇ／／
Ｔ−Ｐ Ｏ，３８〜０．８１■／β
ＰＯ４−Ｐ Ｏ，２１〜０．４６■／ρこの実験で物
理化学的処理をうける水量は、原水の２．５〜３％であ
り、ｐｌｌを１０．５〜１１．０に調整するために必要
な消石灰の添加量は５４０〜６８０■／ｌであった。従
って、３次処理として下水全量に消石灰を添加する場合
（消石灰添加量２５０■／ｌ）に比べて、凝集沈澱設備
の容積は１／４０〜１／３０、消石灰添加量は１／２０
〜１／１０になる。Treated water quality: BOD 4.6~10.7mg// T-P O, 38~0.81■/β PO4-P O, 21~0.46■/ρ Amount of water subjected to physicochemical treatment in this experiment was 2.5 to 3% of the raw water, and the amount of slaked lime added to adjust the pll to 10.5 to 11.0 was 540 to 680 μ/l. Therefore, compared to the case where slaked lime is added to the entire amount of sewage as a tertiary treatment (slaked lime addition amount 250 μ/l), the volume of the coagulation sedimentation equipment is 1/40 to 1/30, and the slaked lime addition amount is 1/20.
~1/10.
このように本発明によれば、最初沈澱池にリンはほとん
ど戻らず、小容量の物理化学的脱リン設備で、かつ少量
の薬品添加で効率良くリンの除去を行うことができる。As described above, according to the present invention, almost no phosphorus returns to the initial settling tank, and phosphorus can be efficiently removed using small-capacity physicochemical dephosphorization equipment and by adding a small amount of chemicals.
図面は本発明方法の一実施態様を示すフローシートであ
る。
２・・・嫌気槽、３・・・好気槽、５・・・汚泥濃縮槽
、６・・・脱水機、８・・・嫌気性消化槽、１０・・・
物理化学的リン除去槽。The drawing is a flow sheet showing one embodiment of the method of the present invention. 2... Anaerobic tank, 3... Aerobic tank, 5... Sludge thickening tank, 6... Dehydrator, 8... Anaerobic digestion tank, 10...
Physicochemical phosphorus removal tank.
Claims (3)
を繰り返すことにより浄化処理する方法において、余剰
汚泥濃縮槽溢流水及び／又は汚泥脱水工程からの排水を
物理化学的リン除去手段によって処理することを特徴と
する廃水の処理方法。(1) In a method for purifying organic wastewater containing phosphorus by repeating an anaerobic process and an aerobic process, excess sludge thickening tank overflow water and/or wastewater from the sludge dewatering process is treated by physicochemical phosphorus removal means. A wastewater treatment method characterized by:
塩、消石灰等のリン凝集剤を用いる凝集沈澱処理である
特許請求の範囲第１項記載の方法。(2) The method according to claim 1, wherein the physicochemical phosphorus removal means is a coagulation-sedimentation treatment using a phosphorus flocculant such as an aluminum salt, iron salt, or slaked lime.
いる晶析法である特許請求の範囲第１項記載の方法。 法。(3) The method according to claim 1, wherein the physicochemical phosphorus removal means is a crystallization method using phosphate rock, bone char, etc. Law.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081112A JPS59206092A (en) | 1983-05-10 | 1983-05-10 | Wastewater treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58081112A JPS59206092A (en) | 1983-05-10 | 1983-05-10 | Wastewater treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59206092A true JPS59206092A (en) | 1984-11-21 |
Family
ID=13737291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58081112A Pending JPS59206092A (en) | 1983-05-10 | 1983-05-10 | Wastewater treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59206092A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60195618A (en) * | 1984-03-17 | 1985-10-04 | Mitsubishi Electric Corp | Display device of process state signal |
| JPS61245892A (en) * | 1985-04-23 | 1986-11-01 | Shimizu Constr Co Ltd | Treatment of phosphorus-containing waste water |
| US4780208A (en) * | 1986-08-29 | 1988-10-25 | Botho Bohnke | Process for purification of effluent |
| JPS6480498A (en) * | 1987-09-21 | 1989-03-27 | Ebara Infilco | Treatment of organic sewage |
| CN106745928A (en) * | 2015-11-19 | 2017-05-31 | 张家港市宏盛贸易有限公司 | Textile waste processing system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50152544A (en) * | 1974-05-29 | 1975-12-08 | ||
| JPS5188856A (en) * | 1975-01-31 | 1976-08-03 | RINSANMATAHARINSANENOGANJUSURU HAISUINOSHORIHOHO | |
| JPS53107151A (en) * | 1977-03-02 | 1978-09-18 | Ajinomoto Kk | Method of dephosphorizing waste water |
| JPS5554087A (en) * | 1978-10-17 | 1980-04-21 | Ebara Infilco Co Ltd | Removing method for phosphoric acid in liquid |
-
1983
- 1983-05-10 JP JP58081112A patent/JPS59206092A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50152544A (en) * | 1974-05-29 | 1975-12-08 | ||
| JPS5188856A (en) * | 1975-01-31 | 1976-08-03 | RINSANMATAHARINSANENOGANJUSURU HAISUINOSHORIHOHO | |
| JPS53107151A (en) * | 1977-03-02 | 1978-09-18 | Ajinomoto Kk | Method of dephosphorizing waste water |
| JPS5554087A (en) * | 1978-10-17 | 1980-04-21 | Ebara Infilco Co Ltd | Removing method for phosphoric acid in liquid |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60195618A (en) * | 1984-03-17 | 1985-10-04 | Mitsubishi Electric Corp | Display device of process state signal |
| JPS61245892A (en) * | 1985-04-23 | 1986-11-01 | Shimizu Constr Co Ltd | Treatment of phosphorus-containing waste water |
| US4780208A (en) * | 1986-08-29 | 1988-10-25 | Botho Bohnke | Process for purification of effluent |
| JPS6480498A (en) * | 1987-09-21 | 1989-03-27 | Ebara Infilco | Treatment of organic sewage |
| CN106745928A (en) * | 2015-11-19 | 2017-05-31 | 张家港市宏盛贸易有限公司 | Textile waste processing system |
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