JPS63221900A - Treatment of excretion-based sewage - Google Patents
Treatment of excretion-based sewageInfo
- Publication number
- JPS63221900A JPS63221900A JP62055279A JP5527987A JPS63221900A JP S63221900 A JPS63221900 A JP S63221900A JP 62055279 A JP62055279 A JP 62055279A JP 5527987 A JP5527987 A JP 5527987A JP S63221900 A JPS63221900 A JP S63221900A
- Authority
- JP
- Japan
- Prior art keywords
- dehydrated
- liquid
- separated
- denitrification process
- slurry
- 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
- 239000010865 sewage Substances 0.000 title abstract description 4
- 230000029142 excretion Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 239000010802 sludge Substances 0.000 claims abstract description 25
- 239000002002 slurry Substances 0.000 claims abstract description 18
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001425 magnesium ion Inorganic materials 0.000 claims abstract description 7
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 239000010800 human waste Substances 0.000 claims description 18
- 239000002351 wastewater Substances 0.000 claims description 10
- 208000005156 Dehydration Diseases 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000002689 soil Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract description 21
- 239000012528 membrane Substances 0.000 abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 239000011777 magnesium Substances 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 5
- 229920006317 cationic polymer Polymers 0.000 abstract description 5
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 5
- 239000011574 phosphorus Substances 0.000 abstract description 5
- 238000006396 nitration reaction Methods 0.000 abstract 3
- 239000008394 flocculating agent Substances 0.000 abstract 2
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 210000002700 urine Anatomy 0.000 description 9
- 239000004744 fabric Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- -1 MgNHnPO* Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003895 organic fertilizer Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野〕
本発明は、し尿系汚水を新規なプロセスにより合理的に
処理し、常に安定して高度の処理水を得る方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for rationally treating human waste wastewater using a new process and always stably obtaining highly treated water.
〔従来技術および発明が解決しようとする問題点〕し尿
を処理するのに、最も代表的なプロセスは、というプロ
セスであるが、このプロセスは固液分離が不安定で、か
つ難脱水性の凝集沈殿汚泥が大量に発生するという大き
な欠点があった。[Prior art and problems to be solved by the invention] The most typical process for treating human waste is the process described above, but this process has unstable solid-liquid separation and agglomeration that is difficult to dewater. A major drawback was that a large amount of settled sludge was generated.
一方、ごく最近では、
という新しいプロセスが提案され、数ケ所で実用化され
た。このプロセスは、固液分離が確実であり、しかも′
ａ集沈殿工程が不要であるという長所がある反面、ｐＨ
調整、再中和、吸着材の再生及び再生廃液の処分という
繁雑な工程を必要とするリン吸着除去工程を限外ヂ過（
ＵＰ）膜分離工程のあとに配備しなければならないとい
う欠点をもっている。On the other hand, very recently, a new process has been proposed and put into practical use in several places. This process ensures solid-liquid separation and
Although it has the advantage of not requiring a precipitation step, the pH
The phosphorus adsorption removal process, which requires complicated steps of conditioning, re-neutralization, regeneration of the adsorbent and disposal of the regenerated waste liquid, is
UP) has the disadvantage that it must be installed after the membrane separation process.
このようなリン吸着除去工程を設けなくてはならない理
由は、ＵＦ膜ではＰＯａｆｆ−が全く除去されずにその
まま透過してしまうためであり、これがＵＦ膜を使う活
性７η泥処理法の最大の問題点であった。The reason why such a phosphorus adsorption/removal process is necessary is that POaff- is not removed at all in the UF membrane and passes through as it is, and this is the biggest problem with the active 7η mud treatment method using the UF membrane. It was a point.
本発明は、これらの従来法のもつ問題点を解決すること
を課題としており、具体的には、■ 凝集沈殿処理を省
略してなおかつ充分なリン除去率を得ること。The present invention aims to solve the problems of these conventional methods, and specifically, (1) omit the coagulation-sedimentation treatment and still obtain a sufficient phosphorus removal rate.
■ ＯＦ膜分離工程のあとに、ＰＯ４３−吸着除去工程
を設けることを不要にすること。(2) It is unnecessary to provide a PO43-adsorption removal process after the OF membrane separation process.
■ 汚泥の脱水性を改善すること。■ Improving the dewatering properties of sludge.
■ プロセス構成を一層簡潔化すること。■ Further simplify the process configuration.
■ 汚泥の肥料的価値を高めること。■ Increasing the fertilizer value of sludge.
を解決課題としている。is the problem to be solved.
本発明は、し尿系汚水にマグネシウムイオンおよび高分
子凝集剤を添加したのち脱水処理し、得られた脱水分離
液を生物学的硝化脱窒素工程にて処理し、該生物学的硝
化脱窒素工程から流出する活性汚泥スラリを膜分離する
ことを特徴とするし尿系ｔη水処理方法である。The present invention involves adding magnesium ions and a polymer flocculant to human waste wastewater, dehydrating it, treating the resulting dehydrated separated liquid in a biological nitrification and denitrification process, and This is a human waste-based tη water treatment method characterized by membrane-separating the activated sludge slurry flowing out from the sludge.
以下、本発明の一実施態様を示す図面を参照しながら、
し尿を対象として本発明の作用を詳しく説明する。Hereinafter, with reference to the drawings showing one embodiment of the present invention,
The effect of the present invention will be explained in detail with regard to human waste.
搬入されたし尿１を微細目のスクリーン２で除渣し、こ
の除渣し尿３に対してマグネシウムイオン（Ｍｇ” ）
４、例えばＭｇ（Ｏｌｌ）オ、ＭｇＯ，ＭｇＣｈなどか
ら選んだＭｇ２°を解離する化合物を添加したのち、さ
らに高分子凝集剤として例えばカチオンポリマ５を注入
し、ａ集槽６でフロック形成させる。The human waste 1 carried in is removed through a fine screen 2, and magnesium ions (Mg'') are added to the removed human waste 3.
4. After adding a compound that dissociates Mg2° selected from, for example, Mg(Oll)O, MgO, MgCh, etc., a cationic polymer 5, for example, is further injected as a macromolecular flocculant, and flocs are formed in a collecting tank 6.
凝集槽６でフロック形成させた凝集スラリを遠心脱水機
８に供給して３８分を脱水し、脱水ケーキ９と脱水分離
液１０とに分離する。一方、スクリーン２で除去された
し渣１１は、スクリュープレス１２で脱水して脱水し渣
１３を得、スクリュープレス脱水分離液１４は除渣し尿
３に混合して処理する。The flocculated slurry formed into flocs in the flocculation tank 6 is supplied to a centrifugal dehydrator 8 and dehydrated for 38 minutes, and separated into a dehydrated cake 9 and a dehydrated separated liquid 10. On the other hand, the residue 11 removed by the screen 2 is dehydrated in a screw press 12 to obtain a residue 13, and the screw press dehydrated separated liquid 14 is mixed with the removed human urine 3 for treatment.
ところで、除渣し尿３中に高濃度（通常５００■／ｉ程
度）に含まれるＰＯ＃１は、添加されたＭｇ！″４と沈
殿生成反応を起こし、Ｍ、ｇＮＩｌ、ＰＯ，↓、Ｍｇｚ
（ＰＯｎ）ｚ ↓、ＭｇＨＰＯｎ↓などの沈殿を生成
し、固相に転換される。しかるのち、これらの沈殿を含
んだ除渣し尿３は、カチオンポリマ５を注入することに
よって、ＭｇＮＪＰＯｔなどの結晶、し尿中のＳＳおよ
びコロイド等が共凝集されるが、後述する生物学的硝化
脱窒素工程で発生した余剰活性汚泥１５（膜分離工程２
１で分離された濃縮スラリ２３の余剰分）を除渣し尿３
に混合するのが好ましい。By the way, PO#1, which is contained in high concentration (usually about 500 μ/i) in the excreted human urine 3, is the added Mg! A precipitation reaction occurs with ``4, M, gNIl, PO, ↓, Mgz
Precipitates such as (POn)z↓ and MgHPOn↓ are generated and converted into a solid phase. After that, the filtered human waste 3 containing these precipitates is injected with a cationic polymer 5, so that crystals such as MgNJPOt, SS in the human waste, colloids, etc. are co-agglomerated. Excess activated sludge generated in the nitrogen process 15 (membrane separation process 2)
The surplus of the concentrated slurry 23 separated in step 1) is removed as waste urine 3
It is preferable to mix it with
この時は、ＭｇＮＨｎＰＯ＊などの微細結晶、し尿中の
コロイド等が余剰汚泥１５０表面に吸着されて極めて効
果的に凝集除去される。At this time, fine crystals such as MgNHnPO*, colloids in human waste, etc. are adsorbed on the surface of the excess sludge 150 and are very effectively coagulated and removed.
したがって、遠心脱水機８で脱水された脱水ケーキ９は
、スクリュープレス１２で脱水された脱水し渣１３と混
合して、ＭｇＮｔ（ｉＰ０４などの肥効成分に冨む無機
物を豊富に含んだ有機性肥料として利用することができ
る。Therefore, the dehydrated cake 9 dehydrated in the centrifugal dehydrator 8 is mixed with the dehydrated residue 13 dehydrated in the screw press 12, and is mixed with the dehydrated residue 13 dehydrated in the screw press 12. It can be used as fertilizer.
なお、ＭｇＮ８４ＰＯ４結晶を含んだ凝集スラリ７を脱
水する機種としては、炉布が不要な遠心脱水４１９８が
好適である。しかし、スクリュープレス、ベルトプレス
、フィルタプレスなどのが布を使用する脱水機も、Ｍｇ
ＮＨ４ＰＯａが炉布に付着しやす（、炉布が目詰まりを
起こしやすいが、使用可能である。Note that as a model for dehydrating the agglomerated slurry 7 containing MgN84PO4 crystals, centrifugal dehydration 4198, which does not require a furnace cloth, is suitable. However, dehydrators such as screw presses, belt presses, and filter presses that use cloth also contain Mg.
NH4POa tends to adhere to the furnace cloth (and the furnace cloth tends to become clogged), but it can be used.
かくて、ＳＳとｐｏａ″−が高度（９０％以上）に除去
された脱水分離液ＩＯを生物学的硝化脱窒素工程に供給
して、ＢＯＤ、ＣＯＤ、Ｔ−Ｎを除去する。生物学的硝
化脱窒素工程として、図示例では硝化液循環タイプのも
のを示し、第１脱窒槽１６、硝化槽１７、第２脱窒槽１
８からなり、硝化槽１７から第１脱窒槽１６へ硝化液１
９を循環させている。Thus, the dehydrated separated liquid IO from which SS and poa''- have been highly removed (more than 90%) is supplied to a biological nitrification and denitrification process to remove BOD, COD, and TN. As the nitrification and denitrification process, the illustrated example shows a nitrification liquid circulation type, which includes a first denitrification tank 16, a nitrification tank 17, and a second denitrification tank 1.
The nitrification liquid 1 is transferred from the nitrification tank 17 to the first denitrification tank 16.
9 is circulating.
また、脱水分離液１０中に少量残留（数１０■／ｌ以下
）するＰＯ４３−は、生物学的硝化脱窒製工程内に高濃
度に維持されている活性汚泥細胞内に摂取されて除去さ
れる。In addition, a small amount of PO43- remaining in the dehydration separation liquid 10 (several tens of cubic meters per liter or less) is absorbed into the activated sludge cells that are maintained at a high concentration in the biological nitrification and denitrification process and is removed. Ru.
次に、生物学的硝化脱窒素工程から流出する活性汚泥ス
ラリ２０＠ＵＦ膜、精密が過（ＭＦ）膜等を装着した膜
分離工程２１ （チューブラタイプもしくはプレートア
ンドフレームタイプが好適）に供給し、ＳＳがゼロ、Ｂ
ＯＤ、Ｔ−Ｎ、 ＰＯ，、’−が数■／Ｉｔ以下とい
う掻めて清澄な膜透過水２２と濃縮スラリ２３とに分離
する。Next, the activated sludge slurry flowing out from the biological nitrification and denitrification process is supplied to the membrane separation process 21 (preferably tubular type or plate and frame type) equipped with UF membrane, MF membrane, etc. , SS is zero, B
The water is separated into extremely clear membrane permeated water 22 whose OD, TN, PO,,'- is less than a few .mu./It and a concentrated slurry 23.
膜透過水２２はこのままでも放流可能な水質をもってい
るが、ＣＯＤ、色度をさらに除去することが要求される
ケースでは、オゾン処理、活性炭吸着処理を行えば良い
。The membrane permeated water 22 has a water quality that can be discharged as it is, but in cases where further removal of COD and chromaticity is required, ozone treatment or activated carbon adsorption treatment may be performed.
なお、極めて高度のｐｏ４’−除去を必要とする場合に
は、生物学的硝化脱窒素工程から流出する活性汚泥スラ
リ２０に対して、Ａ１系もしくはＦｅ系凝集剤を所要量
添加したのち、膜分離工程２１に供給するようにしても
良い。In addition, if an extremely high degree of po4'-removal is required, the required amount of A1-based or Fe-based flocculant is added to the activated sludge slurry 20 flowing out from the biological nitrification and denitrification process, and then the membrane is removed. It may also be supplied to the separation step 21.
また、膜分離工程２１で分離された濃縮スラリ２３の大
部分は、生物学的硝化脱窒素工程の第１脱窒槽１６にリ
サイクルされて余剰分は少ないが、その余剰汚泥は、前
述したように除渣し尿３に混合すると良い。Further, most of the concentrated slurry 23 separated in the membrane separation process 21 is recycled to the first denitrification tank 16 of the biological nitrification and denitrification process, and the surplus is small, but the surplus sludge is It is best to mix it with the removed human urine 3.
神奈川県Ｚ市し尿処理場に搬入されるし尿を、０．７ｎ
目の微細目ロータリースクリーンで除渣し、表−１の水
質を示す除渣し尿を得た。0.7n of human waste transported to the human waste treatment plant in Z City, Kanagawa Prefecture.
The residue was removed using a fine-mesh rotary screen to obtain removed human urine having the water quality shown in Table 1.
表−１除渣し尿水質
コノ除渣し尿にＭｇ （０）１） ｚを１０００１１ｗ
／Ｉｌと、後続する生物学的硝化脱窒素工程から発生す
る余剰汚泥を除潰し尿ｌＩｃ１当り１〜１．５ ｋｇ
Ｄｒｙ ５ｏｌｉｄ添加し、３０分混和し、カチオンポ
リマとしてエバグロースＣ−１０４Ｇ（荏原インフィル
コ株式会社商品名）を２５０ｍｇ／ｊ！添加してパイプ
攪拌を行ったのち（直径５〜８鶴の極めて良好なフロッ
クが形成された）、スクリューデカンタ型遠心脱水機に
供給して脱水処理を行った。その結果、水分８２〜８３
％の脱水ケーキと表−２の水質を存する脱水分離液が得
られ、ＳＳとＰｏ、３−が高度に除去された。Table 1: Mg (0) 1) z in sludge-removed human urine water quality
/Il and the excess sludge generated from the subsequent biological nitrification and denitrification process are crushed and the amount is 1 to 1.5 kg per 1Ic of urine.
Dry 5olid was added, mixed for 30 minutes, and 250 mg/j of Evagrowth C-104G (trade name of Ebara Infilco Co., Ltd.) was added as a cationic polymer! After adding and stirring with a pipe (extremely good flocs with a diameter of 5 to 8 grains were formed), the mixture was fed to a screw decanter type centrifugal dehydrator for dehydration treatment. As a result, the moisture content was 82-83
% dehydrated cake and a dehydrated separated liquid having the water quality shown in Table 2 was obtained, and SS, Po, and 3- were removed to a high degree.
表−２脱水分離液水質
次に、この脱水分離液を硝化液循環型の生物学的硝化脱
窒素工程（活性汚泥ＭＬＳ５１５０００■／１、滞留日
数９日間）に供給し、脱水分離液中の８００゜ＣＯＤ、
Ｔ−Ｎ、 ＰＯａ’−などを生物学的に除去したのち
、流出する活性汚泥スラリを分画分子量４万のポリオレ
フィン製チューブラ型ＵＦｌｌｊＪモジュールにポンプ
圧入して膜分離したところ、表−３の水質を有する清澄
な膜透過水と′ａ縮ススラリ得られ、濃縮スラリを生物
学的硝化脱窒素工程の第１脱窒槽に返送し、余剰分を前
述のように除渣し尿に添加した。Table 2 Water quality of dehydrated separated liquid Next, this dehydrated separated liquid was supplied to a nitrification liquid circulation type biological nitrification and denitrification process (activated sludge MLS515000/1, residence time: 9 days).゜COD,
After biologically removing T-N, POa'-, etc., the flowing activated sludge slurry was pumped into a polyolefin tubular type UFlljJ module with a molecular weight cutoff of 40,000 and subjected to membrane separation, resulting in the water quality shown in Table 3. A clear membrane permeate water and a condensed soot slurry were obtained, and the concentrated slurry was returned to the first denitrification tank of the biological nitrification and denitrification process, and the surplus was added to the filtered urine as described above.
表−３膜通過水水質
〔発明の効果〕
以上詳述した本発明によれば、次のような重要な効果を
得ることができ、従来プロセスの問題点を非常に合理的
に解決できるものである。Table 3 Water quality of water passing through the membrane [Effects of the invention] According to the present invention detailed above, the following important effects can be obtained, and the problems of the conventional process can be solved very rationally. be.
■ 難濃縮脱水性で汚泥処理が厄介な凝集スラッジがほ
とんど発生せず、汚泥の処理が改善される。■ Sludge treatment is improved, with almost no coagulated sludge, which is difficult to thicken and dewater and is difficult to treat.
■ 充分なリン除去率を得ることができ、運転管理が繁
雑なＰＯａ’−吸着除去工程の設置が不要となる。(2) A sufficient phosphorus removal rate can be obtained, and there is no need to install a POa'-adsorption removal process that requires complicated operation management.
■ ｐｏ４．”−吸着剤の再生廃液の処分も不要となる
ので、晶析装置、結晶分離用の遠心分離機等も当然不要
となり、建設費も節減できる。■ po4. ``- Adsorbent regeneration Since there is no need to dispose of the waste liquid, crystallizers, centrifuges for crystal separation, etc. are naturally unnecessary, and construction costs can also be reduced.
■ プロセス構成が簡略化される。■ Process configuration is simplified.
■ 肥効成分に冨んだ有機性肥料を生産できる。■ It is possible to produce organic fertilizer rich in fertilizing ingredients.
図面は本発明の一実施態様を示すフローシートである。
１・・・し尿、２・・・スクリーン、３・・・除渣し尿
、４・・・マグネシウムイオン、５・・・カチオンポリ
マ、６・・・凝集槽、７・・・凝集スラリ、８・・・遠
心脱水機、９・・・脱水ケーキ、１０・・・脱水分離液
、１１・・・し渣、１２・・・スクリュープレス、１３
・・・脱水し渣、１４・・・スクリュープレス脱水分離
液、１５・・・余剰汚泥、１６・・・第１脱窒槽、１７
・・・硝化槽、１８・・・第２脱窒槽、１９・・・硝化
液、２０・・・活性汚泥スラリ、２１・・・膜分離工程
、２２・・・膜透過水、２３・・・濃縮スラリ。
手続補正書 ；
昭和６３年５月６日
特許庁長官 小 川 邦 夫 殿
■、事件の表示 昭和６２年 特 許 願 第５５２
７９号２、発明の名称 し尿系汚水の処理方法３、補
正をする者
事件との関係 特許出願人
名 称 （０４０）荏原インフィルコ株式会社名 称
株式会社 荏原総合研究所４、代理人
５、補正命令の日付 自 発
６、補正により増加する発明の数
７、補正の対象 明細書の特許請求の範囲の欄１
、補正の内容
明細書中
（１）特許請求の範囲を別紙のように訂正する。
（２）第３頁第１９行の「脱水処理し、」を、「固液分
離し、」に補正する。
（３）第３頁最終行の「脱水分離液」を、「固液分離液
」に補正する。
（４）第６頁第５行と第６行の間に次の文を挿入する。
「また、前記遠心脱水機８や前記が布を使用する脱水機
等による脱水処理に代えて、通常の沈降分離、浮上濃縮
、スクリーン分離等の固液分離手段を用いても良く、そ
の場合に分離された固液分離液が前記脱水分離液１０に
相当する。」（５）第７頁第１７行の「余剰汚泥」を、
「余剰汚泥１５」に補正する。
以上
特願昭６２−５５２、
特許請求の範囲
（１）シ尿系汚水にマグネシウムイオンおよび高分子凝
集剤を添加したのち皿血立蓋し、得られた１適分離液を
生物学的硝化脱窒製工程にて処理し、該生物学的硝化脱
窒製工程から流出する活性汚泥スラリを膜分離すること
を特徴とするし尿系汚水の処理方法。
（２）前記し尿系汚水に前記生物学的硝化脱窒製工程の
余剰汚泥を添加するものである特許請求の範囲第１項記
載のし尿系汚水の処理方法。
以上The drawing is a flow sheet showing one embodiment of the invention. 1... Human waste, 2... Screen, 3... Residue human urine, 4... Magnesium ion, 5... Cationic polymer, 6... Coagulation tank, 7... Coagulation slurry, 8... ...Centrifugal dehydrator, 9...Dehydrated cake, 10...Dehydrated separated liquid, 11...Residue, 12...Screw press, 13
... Dewatered residue, 14 ... Screw press dewatering separation liquid, 15 ... Excess sludge, 16 ... First denitrification tank, 17
... Nitrification tank, 18... Second denitrification tank, 19... Nitrification liquid, 20... Activated sludge slurry, 21... Membrane separation process, 22... Membrane permeated water, 23... Concentrated slurry. Procedural amendment; May 6, 1988 Mr. Kunio Ogawa, Commissioner of the Patent Office ■, Indication of the case 1988 Patent Application No. 552
No. 79 No. 2, Title of the invention Method for treating human waste sewage 3, Relationship with the case of the person making the amendment Patent applicant name (040) Ebara Infilco Corporation Name Ebara Research Institute, Inc. 4, Agent 5, Amendment order Date of publication 6, number of inventions increased by amendment 7, subject of amendment Claims column 1 of the specification
, Contents of the amendment (1) The scope of claims in the description is amended as shown in the attached sheet. (2) In page 3, line 19, "dehydrated" is corrected to "solid-liquid separated." (3) Correct “Dehydrated separation liquid” in the last line of page 3 to “Solid-liquid separation liquid”. (4) Insert the following sentence between page 6, line 5 and line 6. "Furthermore, instead of the dehydration treatment using the centrifugal dehydrator 8 or the dehydrator using cloth, ordinary solid-liquid separation means such as sedimentation separation, flotation concentration, and screen separation may be used. In that case, The separated solid-liquid separated liquid corresponds to the dehydrated separated liquid 10.'' (5) ``Excess sludge'' on page 7, line 17,
Correct to "excess sludge 15". Patent Application No. 62-552, Claims (1) Magnesium ions and a polymer flocculant are added to excreta-based wastewater, and then the plate is capped, and the resulting appropriate separated liquid is subjected to biological nitrification and desorption. 1. A method for treating night soil wastewater, which comprises treating it in a nitrification step and separating activated sludge slurry flowing out from the biological nitrification and denitrification step with a membrane. (2) The method for treating human waste wastewater according to claim 1, wherein surplus sludge from the biological nitrification and denitrification process is added to the human waste wastewater. that's all
Claims (2)
集剤を添加したのち脱水処理し、得られた脱水分離液を
生物学的硝化脱窒素工程にて処理し、該生物学的硝化脱
窒素工程から流出する活性汚泥スラリを膜分離すること
を特徴とするし尿系汚水の処理方法。(1) After adding magnesium ions and a polymer flocculant to night soil wastewater, dehydration treatment is performed, and the resulting dehydrated separated liquid is treated in a biological nitrification and denitrification process. A method for treating night soil wastewater, characterized by membrane-separating outflowing activated sludge slurry.
余剰汚泥を添加するものである特許請求の範囲第１項記
載のし尿系汚水の処理方法。(2) The method for treating human waste wastewater according to claim 1, wherein surplus sludge from the biological nitrification and denitrification process is added to the human waste wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62055279A JPS63221900A (en) | 1987-03-12 | 1987-03-12 | Treatment of excretion-based sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62055279A JPS63221900A (en) | 1987-03-12 | 1987-03-12 | Treatment of excretion-based sewage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63221900A true JPS63221900A (en) | 1988-09-14 |
| JPH0217239B2 JPH0217239B2 (en) | 1990-04-19 |
Family
ID=12994153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62055279A Granted JPS63221900A (en) | 1987-03-12 | 1987-03-12 | Treatment of excretion-based sewage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63221900A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03275197A (en) * | 1990-03-23 | 1991-12-05 | Ebara Infilco Co Ltd | Treatment of night soil type sewage |
| JPH044098A (en) * | 1990-04-18 | 1992-01-08 | Ebara Infilco Co Ltd | Treatment of night soil-based sewage |
-
1987
- 1987-03-12 JP JP62055279A patent/JPS63221900A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03275197A (en) * | 1990-03-23 | 1991-12-05 | Ebara Infilco Co Ltd | Treatment of night soil type sewage |
| JPH044098A (en) * | 1990-04-18 | 1992-01-08 | Ebara Infilco Co Ltd | Treatment of night soil-based sewage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0217239B2 (en) | 1990-04-19 |
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