JPS5845320B2 - How to dispose of human waste - Google Patents
How to dispose of human wasteInfo
- Publication number
- JPS5845320B2 JPS5845320B2 JP52011807A JP1180777A JPS5845320B2 JP S5845320 B2 JPS5845320 B2 JP S5845320B2 JP 52011807 A JP52011807 A JP 52011807A JP 1180777 A JP1180777 A JP 1180777A JP S5845320 B2 JPS5845320 B2 JP S5845320B2
- Authority
- JP
- Japan
- Prior art keywords
- human waste
- sludge
- treatment
- aluminum
- liquid
- 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
- 239000010800 human waste Substances 0.000 title claims description 17
- 239000010802 sludge Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000004062 sedimentation Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 10
- 230000015271 coagulation Effects 0.000 claims description 8
- 238000005345 coagulation Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- -1 iron ions Chemical class 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 150000002681 magnesium compounds Chemical class 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims 2
- 150000003839 salts Chemical class 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 21
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 11
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- MXZRMHIULZDAKC-UHFFFAOYSA-L ammonium magnesium phosphate Chemical compound [NH4+].[Mg+2].[O-]P([O-])([O-])=O MXZRMHIULZDAKC-UHFFFAOYSA-L 0.000 description 4
- 230000029087 digestion Effects 0.000 description 4
- 229910052567 struvite Inorganic materials 0.000 description 4
- 239000003337 fertilizer Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 2
- 235000019341 magnesium sulphate Nutrition 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 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 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Removal Of Specific Substances (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【発明の詳細な説明】
本発明は、生し尿又はし尿の消化脱離液の高度処理方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an advanced treatment method for human waste or human waste digested liquid.
従来、一般的なし尿処理方法としては、生し尿を消化槽
で嫌気性消化し、その消化脱離液を数倍〜２０倍に希釈
し、活性汚泥法、散水済床法等の好気性生物処理を行な
うものであるが、このような従来法ではＢＯＤ成分は比
較的効果的に除去されるが、色度、リン酸、窒素成分は
ほとんど除去されないことがよく知られている。Conventionally, general human waste treatment methods include anaerobically digesting human waste in a digestion tank, diluting the digested liquid several times to 20 times, and using aerobic organisms such as activated sludge method and watered bed method. It is well known that such conventional methods relatively effectively remove BOD components, but hardly remove chromaticity, phosphoric acid, and nitrogen components.
このために、最近ではし尿処理場放流水の色度、リン酸
を除去するために、アルミニウム塩、鉄塩などの凝集剤
による凝集沈殿法が検討されているが、し尿処理水は下
水などとくらべて被凝集物質の量が多いため、凝集剤の
添加量を非常に多く必要とする。For this reason, in order to remove the color and phosphoric acid from the water discharged from human waste treatment plants, coagulation-sedimentation methods using flocculants such as aluminum salts and iron salts have recently been considered. In comparison, since the amount of material to be flocculated is large, it is necessary to add a very large amount of flocculant.
例えば、下水処理水では硫酸パン±３０〜７０９−で十
分であるのに対し、し尿処理水では３００〜５００ｐｐ
Ｉ１１必要とするのが普通である。For example, pan sulfate ±30-709-pp is sufficient for sewage-treated water, whereas 300-509 pp is sufficient for human waste-treated water.
I11 is normally required.
この結果、スラッジ発生量が膨大となり、薬品費も高く
なっている。As a result, the amount of sludge generated is enormous and the cost of chemicals is also high.
また、上水処理の分野で、スラッジ発生量の低減、脱水
性の改善、および凝集剤の回収再使用の目的で、凝集沈
殿スラッジに鉱酸を加えて水酸化アルミニウム等を再溶
解し、アルミニウムイオン等を抽出し、これを凝集剤と
して再使用する方法も実施されている。In addition, in the field of water treatment, mineral acids are added to coagulated and precipitated sludge to redissolve aluminum hydroxide, etc., for the purpose of reducing the amount of sludge generated, improving dewatering performance, and recovering and reusing flocculants. A method of extracting ions and the like and reusing them as a flocculant has also been implemented.
本発明者は、この凝集沈殿スラッジの酸処理による凝集
剤の回収再使用をし尿処理水の凝集沈殿法に適用すべく
実験をすすめたが、し尿処理水中にはリン酸が数１０ｐ
−と多量に含まれていをため、凝集沈殿スラッジ中には
リン酸アルミニウム沈殿も多量に含まれ、凝集沈殿スラ
ッジを酸処理すると、アルミニウムイオンの他にリン酸
イオンも再溶解してしまい、凝集剤の回収再使用は可能
であっても、その反面リン酸を除去するという目的は全
く果せなくなるという大きな欠点のあることが判明した
。The present inventor carried out an experiment in order to apply the recovery and reuse of the flocculant by acid treatment of the coagulated and precipitated sludge to the coagulation-sedimentation method for treated human waste water.
The coagulated and precipitated sludge also contains a large amount of aluminum phosphate precipitate, and when the coagulated and precipitated sludge is treated with acid, phosphate ions as well as aluminum ions are redissolved, and the coagulated and precipitated sludge is coagulated. Although it is possible to recover and reuse the agent, it has been found that there is a major drawback in that the purpose of removing phosphoric acid cannot be achieved at all.
本発明は、上記凝集沈殿スラッジの酸処理におけるリン
酸の再溶解現象という重大欠点を解消し、かつし尿中の
リン酸を肥料として利用可能なリン酸化合物として回収
することを目的とするものである。The purpose of the present invention is to eliminate the serious drawback of the phosphoric acid re-dissolution phenomenon in the acid treatment of coagulated and settled sludge, and to recover phosphoric acid in human urine as a phosphoric acid compound that can be used as fertilizer. be.
本発明は、生し尿又はし尿の消化脱離液にマグネシウム
化合物を添加混和し、リン酸マグネシウムアンモンを主
とする沈殿物を生威し、その沈殿を固液分離し、得られ
る流出水を活性汚泥法、散水済床法等の好気性生物処理
し、その処理水にアルミニウム塩又は鉄塩を加えて凝集
沈殿処理し、得られた凝集沈殿スラッジに硫酸などの鉱
酸で酸処理し、再溶解したアルミニウム又は鉄イオンを
前記凝集沈殿における凝集剤として再使用することを特
徴とするものである。The present invention involves adding and mixing a magnesium compound to raw human waste or human waste digested liquid, producing a precipitate mainly consisting of magnesium ammonium phosphate, separating the precipitate into solid and liquid, and activating the resulting effluent water. Aerobic biological treatment such as sludge method or sprinkled bed method is performed, and aluminum salt or iron salt is added to the treated water to perform coagulation sedimentation treatment.The resulting coagulation sedimentation sludge is acid treated with mineral acids such as sulfuric acid, This method is characterized in that dissolved aluminum or iron ions are reused as a flocculant in the coagulation and precipitation.
すなわち本発明は、し尿の生物処理工程からの流出水を
凝集沈殿処理する場合に、あらかじめマグネシウム化合
物を添加することによって、し尿中のリン酸の大部分を
肥料として利用可能なリン酸マグネシウムアンモン沈殿
として分離除去し、凝集沈殿スラッジ中にリン酸のアル
ミニウム塩、鉄塩の沈殿物がほとんど含まれないように
し、凝集沈殿スラッジを鉱酸で酸処理する場合にリン酸
の再溶解を防止するものである。In other words, the present invention provides a magnesium ammonium phosphate precipitate that allows most of the phosphoric acid in the human waste to be used as fertilizer by adding a magnesium compound in advance when the runoff water from the biological treatment process of human waste is subjected to coagulation and precipitation treatment. This prevents phosphoric acid from redissolving when the coagulated and precipitated sludge is acid-treated with mineral acid. It is.
本発明に使用するマグネシウム化合物としては、塩化マ
グネシウム、硫酸マグネシウム、酸化マグネシウムが入
手容易で適当であるが、水中でマグネシウムイオンを解
離するものであれば、その他随意のものが選択できる。Magnesium chloride, magnesium sulfate, and magnesium oxide are readily available and suitable as the magnesium compound used in the present invention, but any other compound can be selected as long as it dissociates magnesium ions in water.
また、上記リン酸マグネシウムアンモンの沈殿生成には
、ｐＨが重要な因子であり、中性以上、好ましくは８０
以上にするが、例えばし尿の嫌気性消化脱離液のｐＨは
通常８．０以上であるため、必ずしもアルカリ剤の添加
を必要とするとは限らない。In addition, pH is an important factor for the precipitation of magnesium ammonium phosphate, and pH is above neutral, preferably 80.
As mentioned above, since the pH of the desorbed liquid from anaerobic digestion of human waste is usually 8.0 or higher, it is not necessarily necessary to add an alkaline agent.
以上述べたように本発明によれば、し尿処理水の凝集沈
殿処理における、凝集沈殿スラッジからの凝集剤の回収
再利用、スラッジ発生量の減少、汚泥処理の容易化をは
かると同時に、リン酸の再溶解現象を解消し、しかもし
尿中のリン酸を肥料価値の高いリン酸マグネシウムアン
モンとして回収利用できるというきわめて犬なる効果を
奏するものである。As described above, according to the present invention, in the coagulation-sedimentation treatment of human waste water, it is possible to recover and reuse the flocculant from the coagulated-sedimentation sludge, reduce the amount of sludge generated, and facilitate the sludge treatment. In addition, the phosphoric acid in the urine can be recovered and used as magnesium ammonium phosphate, which has high fertilizer value.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
Ａ市の嫌気性消化−活性汚泥処理方式によるし尿処理場
の嫌気性消化脱離液を採取し、分析した結果は次のよう
な水質であった。Anaerobic digestion desorbed liquid from a human waste treatment plant using the anaerobic digestion-activated sludge treatment method in City A was collected and analyzed, and the water quality was as follows.
アンモニア性窒素 ３．０００ １ｒｕ？／１この消
化脱離液に硫酸マグネシウムを２，０００■／ １１
（ａｓ Ｍｇ２“）添加し、２０分間攪拌したのち、１
時間静置した上澄液中の水質は次の通りで、リン酸はき
わめて良く除去され、ＢＯＤ、アンモニアもわずかに除
去された。Ammonia nitrogen 3.000 1ru? /1 Add 2,000 μg of magnesium sulfate to this digestive desorption fluid / 11
(as Mg2") was added and stirred for 20 minutes, then 1
The quality of the water in the supernatant after standing for a period of time was as follows: phosphoric acid was removed very well, and BOD and ammonia were also slightly removed.
次に、上記リン酸の大部分を除去した液を河川水で１０
倍に希釈し、通常の活性汚泥法（ＢＯＤ−ＭＬＳＳ負荷
０．３ｋｇＢＯＤ／ＭＬＳＳｋｇ田。Next, the solution from which most of the phosphoric acid had been removed was mixed with river water for 10
Diluted twice and used the normal activated sludge method (BOD-MLSS loading 0.3 kg BOD/MLSS kg field.
ＭＬＳＳ濃度２，０００１）Ｉ）Ｉｌｌ）で処理した結
果、処理水の水質は次の通りであった。As a result of treatment with MLSS concentration of 2,0001)I)Ill), the quality of the treated water was as follows.
さらに、この処理水に硫酸アルミニウム３５０卿および
高分子凝集剤ｉ、ｏｐｐｍ添加混和し、スラッジブラン
ケット型凝集沈殿装置で上昇流速２５０ｍｍ／ ｍ ｉ
ｎで処理し、ブランケット層に形成されたスラッジ硫
酸を加えてｐＨを２．５に調整し、シックナーで滞留時
間５時間で濃縮し、その上澄液を再び凝集剤として再使
用しつつ処理を継続させた。Furthermore, aluminum sulfate 350% and polymer flocculant I, oppm were added and mixed to this treated water, and the mixture was mixed with a sludge blanket type coagulation sedimentation device at an upward flow rate of 250 mm/mi.
The sludge formed in the blanket layer was treated with sludge, the pH was adjusted to 2.5 by adding sulfuric acid, and the sludge was concentrated in a thickener with a residence time of 5 hours, and the supernatant liquid was reused as a flocculant while continuing the treatment. Continued.
そのときの上記スラッジブランケット型凝集沈殿装置に
おける処理水の水質は次の通りであった。At that time, the quality of the water treated in the sludge blanket type coagulation-sedimentation apparatus was as follows.
Claims (1)
を添加混和し、生成する沈殿を固液分離したのち、さら
に好気性生物処理し、該生物処理水にアルミニウム塩又
は鉄塩を添加して凝集沈殿処理し、得られた凝集沈殿ス
ラッジに鉱酸を添加して再溶解したアルミニウム又は鉄
イオンを前記凝集沈殿処理に再使用することを特徴とす
るし尿液の処理方法。 ２ 前記マグネシウム化合物を添加混和して沈殿を生成
するに際し、液の田を中性以上、好ましくは８．０以上
にする特許請求の範囲第１項記載のし尿液の処理方法。[Scope of Claims] 1. A magnesium compound is added and mixed with raw human waste or human waste digested liquid, the resulting precipitate is separated into solid and liquid, and then subjected to aerobic biological treatment, and aluminum salt or iron is added to the biologically treated water. A method for treating night soil, characterized by adding salt and performing coagulation sedimentation treatment, adding mineral acid to the obtained coagulation sedimentation sludge, redissolving aluminum or iron ions, and reusing the aluminum or iron ions in the coagulation sedimentation treatment. . 2. The method for treating night soil fluid according to claim 1, in which the pH of the liquid is made to be at least neutral, preferably at least 8.0, when adding and mixing the magnesium compound to form a precipitate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52011807A JPS5845320B2 (en) | 1977-02-06 | 1977-02-06 | How to dispose of human waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52011807A JPS5845320B2 (en) | 1977-02-06 | 1977-02-06 | How to dispose of human waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5397253A JPS5397253A (en) | 1978-08-25 |
| JPS5845320B2 true JPS5845320B2 (en) | 1983-10-08 |
Family
ID=11788101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52011807A Expired JPS5845320B2 (en) | 1977-02-06 | 1977-02-06 | How to dispose of human waste |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5845320B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62262789A (en) * | 1986-05-08 | 1987-11-14 | Unitika Ltd | Method for removing phosphorus |
| JPS637117U (en) * | 1986-06-27 | 1988-01-18 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5715898A (en) * | 1980-07-01 | 1982-01-27 | Ebara Infilco Co Ltd | Treatment of organic waste liquid |
| US6402801B1 (en) * | 1998-05-01 | 2002-06-11 | N-Viro International Corp. | Method for treating ammonia-containing organic waste |
| JP2004025055A (en) * | 2002-06-26 | 2004-01-29 | Unitika Ltd | Treatment method of returned water from sludge treatment |
-
1977
- 1977-02-06 JP JP52011807A patent/JPS5845320B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62262789A (en) * | 1986-05-08 | 1987-11-14 | Unitika Ltd | Method for removing phosphorus |
| JPS637117U (en) * | 1986-06-27 | 1988-01-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5397253A (en) | 1978-08-25 |
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