JPS598439B2 - How to treat organic wastewater - Google Patents
How to treat organic wastewaterInfo
- Publication number
- JPS598439B2 JPS598439B2 JP51143757A JP14375776A JPS598439B2 JP S598439 B2 JPS598439 B2 JP S598439B2 JP 51143757 A JP51143757 A JP 51143757A JP 14375776 A JP14375776 A JP 14375776A JP S598439 B2 JPS598439 B2 JP S598439B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- granular solid
- organic wastewater
- wastewater
- added
- 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
- 239000002351 wastewater Substances 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 239000005416 organic matter Substances 0.000 claims description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011343 solid material Substances 0.000 claims 2
- 239000010802 sludge Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000010800 human waste Substances 0.000 description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000920 calcium hydroxide Substances 0.000 description 4
- 235000011116 calcium hydroxide Nutrition 0.000 description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 159000000014 iron salts Chemical class 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 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 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 159000000003 magnesium salts Chemical class 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical class [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229940085991 phosphate ion Drugs 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 229910052567 struvite Inorganic materials 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】
本発明は、し尿、と場廃水、食品加工廃水等の高濃度に
有機物を含む廃水の生物処理水中のリン酸を除去する方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing phosphoric acid from biologically treated water of wastewater containing a high concentration of organic matter, such as human waste, slaughterhouse wastewater, and food processing wastewater.
従来、例えばし尿処理プロセスでは、生し尿を消化槽で
嫌気性消化し、その消化脱離液を河川水などで１０〜２
０倍程度に希釈し、活性汚泥法等の好気性微生物処理す
るものであるが、かかるプロセスによると、ＢＯＤ成分
は効果的に除去されるのに対し、窒素、リンはほとんど
除去されないことがよく知られている。Conventionally, for example, in the human waste treatment process, human waste is anaerobically digested in a digestion tank, and the digested liquid is mixed with river water for 10 to 2 hours.
It is diluted to about 0 times and treated with aerobic microorganisms such as activated sludge method, but while BOD components are effectively removed by this process, nitrogen and phosphorus are often hardly removed. Are known.
また、と場廃水、食品廃水等の生物処理水中にも窒素、
リンが除去されずに残留している。Nitrogen is also present in biologically treated water such as abattoir wastewater and food wastewater.
Phosphorus remains without being removed.
このだめ、これら生物処理水の放流水域の窒素、リンの
過多による富栄養化現象、魚介類への悪影響が大きな問
題となっている。As a result, eutrophication due to excess nitrogen and phosphorus in the water areas into which these biologically treated water are discharged, and negative effects on fish and shellfish, have become major problems.
従来、液中のリンを除去する方法としては、硫酸アルミ
ニウム、鉄塩、消石灰による凝集沈殿法が知られている
が、硫酸アルミニウム、鉄塩による凝集沈殿法では、非
常に脱水困難なスラツジが大量に発生するという欠点が
ある。Conventionally, the coagulation precipitation method using aluminum sulfate, iron salts, and slaked lime has been known as a method for removing phosphorus from liquids, but the coagulation precipitation method using aluminum sulfate and iron salts produces a large amount of sludge, which is extremely difficult to dewater. The disadvantage is that it occurs in
また、消石灰による凝集沈殿法は、リンを効果的に除去
するためにｐＨを１１．０以上にしなければならないが
、例えばし尿の生物処理水のＭアルカリ度は５００〜１
０ ０ ０ ｐｐｍと高く、極めて緩衝性が強いため
、ｐＨを１１．０以上にするためには消石灰を数千ｐｐ
ｍも添加しなければならず、その結果薬品代、スラツジ
発生量が膨大になるという欠点をもっており、さらに放
流するだめに処理水（放流水）の田を下げる必要があり
、再中和しなければならないという欠点もある。In addition, in the coagulation-sedimentation method using slaked lime, the pH must be set to 11.0 or higher in order to effectively remove phosphorus, but for example, the M alkalinity of biologically treated human waste water is 500 to 1.
It has a high pH of 0 0 0 ppm and has extremely strong buffering properties, so in order to raise the pH to 11.0 or higher, several thousand ppm of slaked lime is required.
This has the disadvantage of increasing chemical costs and the amount of sludge produced.Furthermore, the treated water (effluent water) must be lowered in the field before it can be discharged, and it must be re-neutralized. It also has the disadvantage of not having to be used.
本発明は、上記リンを除去する従来法の欠点を解消し、
発生スラツジ量も少なく、かつスラツジの脱水処理をも
容易ならしめることを目的とするものである。The present invention eliminates the drawbacks of the conventional method for removing phosphorus,
The purpose is to reduce the amount of sludge generated and to facilitate dewatering of the sludge.
本発明は、高濃度に有機物を含む廃水の生物処理水に、
マグネシウムの塩、水酸化物もしくは酸化物等の水溶液
中でマグネシウムイオンを解離する化合物を添加し、か
つｐＨを７５以上に調整したのち、粒状固形物充填層内
に通水することによって原水中のリン酸を除去すること
を特徴とするもので、前記粒状固形物充填層を形成する
粒状固形物としては、砂、アンスラサイト、ガーネット
等の各種鉱物、プラスチック粒子など、任意のものを選
択使用できるが、特にマグネシウムを含む鉱物、例えば
、
蛇紋岩・・・Ｍｇ ３ ｓｉ２０５（ ＯＨ）４グアー
ナイト−Ｍｇ， ＰＯ４， Ｃａ ， ＮＨ４の複雑な
組成をもつ鉱物
ストルーバイト・・・ＮＨ４ＭｇＰＯ４・６Ｈ２０マグ
ネシア・・・ＭｇＯ
などは効果的である。The present invention provides biologically treated wastewater containing a high concentration of organic matter.
After adding a compound that dissociates magnesium ions in an aqueous solution such as a magnesium salt, hydroxide, or oxide and adjusting the pH to 75 or higher, water is passed through a bed filled with granular solids to reduce the amount of water in the raw water. It is characterized by removing phosphoric acid, and as the granular solids forming the granular solid packed layer, any material can be selected and used, such as sand, various minerals such as anthracite and garnet, and plastic particles. However, minerals containing magnesium, such as serpentine...Mg3si205(OH)4guanite-Struvite, a mineral with a complex composition of Mg, PO4, Ca, NH4...NH4MgPO4.6H20magnesia...・MgO etc. are effective.
まだ、本発明において、上記粒状固形物充填層内に通水
する際の原水のｐＨは重要な因子でありｐＨ ７． ５
以上、好ましくはｐＨ ８． ０〜１１．５の範囲にす
ると効率的であり、このｐＨの調整法としては、アルカ
リ剤添加のほかにエアレーションによって水中のＣＯ２
をストリツピングすることによっても達成できる。However, in the present invention, the pH of the raw water when flowing into the granular solid packed bed is an important factor, and pH 7. 5
Above, preferably pH 8. It is efficient to adjust the pH to a range of 0 to 11.5. In addition to adding an alkaline agent, aeration can be used to reduce CO2 in the water.
This can also be achieved by stripping.
なお、マグネシウムイオンを解離する化合物としては、
マグネシウム水酸化物、酸化物もしくはマグネシウム塩
があり、その添加量は生物処理水中のリン酸イオン濃度
に対し、マグネシウムイオンとしてモル比でＭ．！ｌｉ
’／ＰＯ４＝１． ０近辺になるように添加するのがよ
く、好ましくは１．０〜１．５である。In addition, compounds that dissociate magnesium ions include:
Magnesium hydroxide, oxide, or magnesium salt is available, and the amount added is M. ! li
'/PO4=1. It is best to add it so that it is around 0, preferably 1.0 to 1.5.
このようにして、一定期間原水を通水したのちの粒状固
形物充填層内を観察してみると、黄白色の結晶性物質が
粒状固形物表面に付着しているのが観察され、この黄白
色の結晶性物質の組成は未確認であるが、従来のアルミ
ニウム塩、鉄塩による凝集沈殿スラツジと異なシ、結晶
性であるために緻密であり、脱水性が極めて良好であシ
、単なる篩などで容易に分離できるものであった。When the inside of the packed bed of granular solids was observed after raw water was passed through it for a certain period of time, it was observed that a yellowish-white crystalline substance was attached to the surface of the granular solids. Although the composition of the white crystalline substance is unconfirmed, it is different from conventional flocculation sedimentation sludge made from aluminum salts and iron salts. It could be easily separated.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
実施例 １
０市のし尿処理場の活性汚泥処理水の水質は次のようで
あった。Example 1 The quality of activated sludge treated water at the human waste treatment plant in 0 cities was as follows.
これを原水とし、消石灰を添加してｐＨを８．０に調整
し、ＭｇＳ Ｏ，を３ ０ ｐｐｍ（ ａｓ ｗ）すな
わちＭｊｉ／Ｐ０４（モル比）−１．４７〜１．９６添
加したのち、粒径１〜３ｍｍの蛇紋岩を高さ２ｍ充填し
た直径３０ＣＩｒＬのカラムにＬ■−５ｍ／ｈで通水し
た結果、この流出水の水質は次の通りであった。This was used as raw water, slaked lime was added to adjust the pH to 8.0, and 30 ppm (as w) of MgSO, that is, Mji/P04 (molar ratio) -1.47 to 1.96, was added. Water was passed through a column with a diameter of 30 CIrL filled with serpentinite with a grain size of 1 to 3 mm to a height of 2 m at a rate of L -5 m/h, and the quality of the effluent water was as follows.
また、蛇紋岩の代りに砂を用いたときの結果も併記した
。The results obtained when sand was used instead of serpentine were also shown.
実施例 ３
本発明における原水のｐＨの影響を調べた結果は次の通
りであった。Example 3 The results of investigating the influence of the pH of raw water in the present invention were as follows.
実施例１と同一の原水、Ｍ９ＳＯ４添加量、通水速度、
蛇紋岩を充填粒状固形物としたカラムに通水する際、Ｈ
２ＳＯ４及びＮａＯＨでｐＨを６．５ ｔ ７− ５
ｔ８．０ ， ９．０ ， １ ０．５ ， １ １．
５と変化させたときの残留リン酸イオン濃度は、第１図
に示す通りであった。The same raw water as in Example 1, the amount of M9SO4 added, the water flow rate,
When water is passed through a column filled with serpentine as a granular solid, H
pH 6.5 with 2SO4 and NaOH 7-5
t8.0, 9.0, 1 0.5, 1 1.
The residual phosphate ion concentration when the concentration was changed to 5 was as shown in FIG.
第１図からも明らかなように、ｐＨが７．０以下では、
ほとんどリン酸は除去されないが、７．５以上になると
急激に除去効果が向上した。As is clear from Figure 1, when the pH is below 7.0,
Although almost no phosphoric acid was removed, the removal effect rapidly improved when the value was 7.5 or higher.
また、ＭｇＳ０４を添加せず、単にｐＨを調整したのみ
では第１図中破線で示したようにリン酸の除去効果は極
めて劣っていた。Furthermore, when MgSO4 was not added and the pH was simply adjusted, the phosphoric acid removal effect was extremely poor as shown by the broken line in FIG.
以上述べたように本発明によれば、高濃度に有機物を含
む廃水の生物処理水からリン酸を効率よく除去すること
ができ、発生スラツジ量も少なくかつ緻密な結晶性物質
として充填粒状固形物に沈着するから脱水処理が極めて
容易となるものである。As described above, according to the present invention, phosphoric acid can be efficiently removed from biologically treated wastewater containing a high concentration of organic matter, the amount of sludge generated is small, and the sludge is packed as a dense crystalline substance in the form of granular solids. Dehydration treatment is extremely easy because it is deposited in the water.
第１図は、世と残留リン酸イオン濃度との関係を示す線
図である。FIG. 1 is a diagram showing the relationship between the temperature and the residual phosphate ion concentration.
Claims (1)
中でマグネシウムイオンを解離する化合物を添加し、か
つｐＨを７．５以上に調整したのち、粒状固形物充填層
内に通水することによってリン酸を除去することを特徴
とする有機性廃水の処理方法。 ２ 前記粒状固形物充填層内に通水する際に、原水のｐ
Ｈを８．０〜１１．５に調整する特許請求の範囲第１項
記載の有機性廃水の処理方法。 ３ 前記粒状固形物充填層を形成する粒状固形物として
、マグネシウムを含む鉱物を使用する特許請求の範囲第
１項又は第２項記載の有機性廃水の処理方法。[Claims] 1. A compound that dissociates magnesium ions in an aqueous solution is added to biologically treated wastewater containing a high concentration of organic matter, and after adjusting the pH to 7.5 or higher, a granular solid-filled bed is added. A method for treating organic wastewater characterized by removing phosphoric acid by passing water through the wastewater. 2 When passing water into the granular solid packed bed, the p of the raw water is
The method for treating organic wastewater according to claim 1, wherein H is adjusted to 8.0 to 11.5. 3. The method for treating organic wastewater according to claim 1 or 2, wherein a mineral containing magnesium is used as the granular solid material forming the granular solid material packed bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51143757A JPS598439B2 (en) | 1976-11-30 | 1976-11-30 | How to treat organic wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51143757A JPS598439B2 (en) | 1976-11-30 | 1976-11-30 | How to treat organic wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5367960A JPS5367960A (en) | 1978-06-16 |
| JPS598439B2 true JPS598439B2 (en) | 1984-02-24 |
Family
ID=15346302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51143757A Expired JPS598439B2 (en) | 1976-11-30 | 1976-11-30 | How to treat organic wastewater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598439B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS605282A (en) * | 1983-06-22 | 1985-01-11 | Hitachi Plant Eng & Constr Co Ltd | Treatment of phosphate ion-containing water |
| JPS605283A (en) * | 1983-06-22 | 1985-01-11 | Hitachi Plant Eng & Constr Co Ltd | Treatment method for water containing phosphate ions |
-
1976
- 1976-11-30 JP JP51143757A patent/JPS598439B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5367960A (en) | 1978-06-16 |
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