JPS58104696A - Treatment of waste water - Google Patents
Treatment of waste waterInfo
- Publication number
- JPS58104696A JPS58104696A JP56203405A JP20340581A JPS58104696A JP S58104696 A JPS58104696 A JP S58104696A JP 56203405 A JP56203405 A JP 56203405A JP 20340581 A JP20340581 A JP 20340581A JP S58104696 A JPS58104696 A JP S58104696A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- treatment
- water
- tank
- returned
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 14
- 239000010802 sludge Substances 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000005189 flocculation Methods 0.000 claims abstract description 8
- 230000016615 flocculation Effects 0.000 claims abstract description 8
- 238000004062 sedimentation Methods 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 9
- 238000005345 coagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 claims 1
- 238000004220 aggregation Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 8
- 239000002562 thickening agent Substances 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 239000006228 supernatant Substances 0.000 abstract description 4
- 230000008719 thickening Effects 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000001376 precipitating effect Effects 0.000 abstract 3
- 238000005273 aeration Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000723436 Chamaecyparis obtusa Species 0.000 description 1
- 206010013496 Disturbance in attention Diseases 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000009423 ventilation Methods 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)
Abstract
Description
【発明の詳細な説明】
本発明は、廃水の活性汚泥処理法の改良、詳しくは廃水
の活性汚泥処理により発生する汚泥の有効な処理方法−
と関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an improved activated sludge treatment method for wastewater, more specifically, an effective treatment method for sludge generated by activated sludge treatment of wastewater.
It is related to.
従来の廃水の活性汚泥法においては、一般に活性汚泥処
理工程からの流出液は沈殿濃縮されたのち、その分離水
がさらに凝集処理され、ここで得られる分離水が処理水
になると共に、前記沈殿濃縮工程による濃縮汚泥が活性
汚泥処理工程への返送汚泥と余剰汚泥とに分流され、＃
余剰汚泥と前記凝集処理による分離汚泥の両汚泥が汚泥
処理工−３−
程で処理されている。なお、該両汚泥の一部は所望によ
り前記活性汚泥処理工程へ返送されることもある。In the conventional activated sludge method for wastewater, the effluent from the activated sludge treatment process is generally precipitated and concentrated, and then the separated water is further subjected to coagulation treatment, and the separated water obtained here becomes treated water and the precipitated water is Thickened sludge from the thickening process is divided into sludge returned to the activated sludge treatment process and surplus sludge.
Both the surplus sludge and the separated sludge resulting from the flocculation treatment are treated in the sludge treatment step -3-. Note that a portion of both sludges may be returned to the activated sludge treatment step, if desired.
このような廃水の活性汚泥処理においては、汚濁物を浄
化した活性汚泥の固液分離能の良し悪しが極めて重要で
あることは周知のことである。しかしながら実際には、
活性汚泥処理法では、しばしば糸状性細菌の増殖により
あるいは活性汚泥が微細に分散することにより汚泥の沈
降性、濃縮性が悪化し処理水ＳＳが増加したり、返送汚
泥濃度が低丁してげつ気槽に充分な汚泥が維持できなく
なるなどのトラブルを生ずる。In the activated sludge treatment of such wastewater, it is well known that the quality of the solid-liquid separation ability of the activated sludge purified from pollutants is extremely important. However, in reality,
In the activated sludge treatment method, the settling and thickening properties of sludge are often deteriorated due to the proliferation of filamentous bacteria or the fine dispersion of activated sludge, resulting in an increase in treated water SS and a low concentration of returned sludge. This may cause problems such as not being able to maintain sufficient sludge in the ventilation tank.
本発明は、活性汚泥処理に付随する、前記した重大な欠
点を解消することを目的とするものである。The present invention aims to eliminate the above-mentioned serious drawbacks associated with activated sludge treatment.
本発明は、活性汚泥処理工程沈殿槽の引抜き汚・泥を遠
心分離し１分前水門沈殿槽溢流水とともに１１ト
後処理することにより、沈殿槽の溢流負荷を低減すると
ともに返送汚泥、余剰汚泥を高濃度に維持することによ
り円滑な生物処理、余剰汚泥処理を行うように構成した
ものである。The present invention reduces the overflow load on the settling tank and removes the returned sludge and surplus by centrifuging the sludge and sludge pulled out of the settling tank in the activated sludge treatment process and post-processing the sludge along with the overflow water from the sluice settling tank 1 minute earlier. It is designed to perform smooth biological treatment and surplus sludge treatment by maintaining sludge at a high concentration.
次に本発明の一実施態様について図面に基づき説明する
。Next, one embodiment of the present invention will be described based on the drawings.
廃水１は返送汚泥２（！−ともに活性汚泥ばつ気槽３に
流入し、廃水のＢ ＯＤ 、 ＣＯＤ−Ｍｎ、窒禦、リ
ンなどの汚濁成分が除去されたのち沈殿槽４で固液分離
され、沈降汚泥６は遠心濃縮機６で濃縮されたのち一部
は返送汚泥２としてげつ気槽３に返送され、残部は余剰
汚泥γとして汚泥処理工程８に移送される。遠心分離水
９は沈殿槽上澄水１０きともに凝集槽１１に流入し、
Ｂ ＯＤ 、ＣＯＤ−Ｍｎ。The wastewater 1 flows into the activated sludge aeration tank 3, and after removing the pollutants such as BOD, COD-Mn, nitrogen, and phosphorus from the wastewater, it is separated into solid and liquid in the settling tank 4. After the settled sludge 6 is concentrated in the centrifugal concentrator 6, a portion is returned to the aeration tank 3 as return sludge 2, and the remainder is transferred to the sludge treatment process 8 as surplus sludge γ.The centrifuged water 9 is The sedimentation tank supernatant water 10 flows into the coagulation tank 11,
BOD, COD-Mn.
リン、ＳＳが凝集したのち凝集汚泥分＃槽１３に流入し
、凝集分離水１３は直接あるいはさらに高度処理を受け
たのち放流される。凝集汚泥１４は余剰汚泥７と直接混
合されたのち、あるいは遠心濃縮機６で濃縮したのち汚
泥処理される。After the phosphorus and SS are flocculated, they flow into the flocculated sludge tank 13, and the flocculated separated water 13 is discharged directly or after being subjected to advanced treatment. The flocculated sludge 14 is directly mixed with the surplus sludge 7, or after being concentrated by the centrifugal thickener 6, the sludge is treated.
沈降汚泥器：′、メ一部は、遠心濃縮機６を経由しなく
−Ｃ＋ｄ−ｖ’Ａ−’５ｅｌｔｆ＋ｆＥｙｌｌＡａｆ＋
ｆ）ｍｌ［［！’ｉｃＴ 。Sedimentation sludge machine: ', Me part does not go through the centrifugal concentrator 6 -C+d-v'A-'5eltf+fEyllAaf+
f) ml[[! 'icT.
き且つ沈殿槽４の固液分離が円滑番と行なわれる場合は
、バイパス１ｓを経由して直接ぼり気槽Ｓ＋こ５−
返送し、遠心濃縮機６は沈降汚泥６の残部と凝集汚泥１
４の濃縮に使用する。この場合、遠心濃縮機６は回分式
の運転も可能となる。沈降汚泥ｌを連続的に遠心＃縮し
且つ凝集汚泥１４を遠心濃縮する場合、返送汚泥２に凝
集汚泥１４が混入しても特に問題はないが、汚泥中の不
活性分の増加を避けたいときには凝集汚泥１４濃縮時の
濃縮汚泥を全量汚泥処理工程８へ移送するとよい。If the solid-liquid separation in the sedimentation tank 4 is carried out smoothly, the sludge is directly returned to the atomization tank S via the bypass 1s, and the centrifugal concentrator 6 collects the remainder of the settled sludge 6 and the flocculated sludge 1.
Used for concentration of step 4. In this case, the centrifugal concentrator 6 can also be operated in batch mode. When the settled sludge 1 is continuously centrifuged and the flocculated sludge 14 is centrifugally concentrated, there is no particular problem even if the flocculated sludge 14 is mixed into the returned sludge 2, but it is desirable to avoid an increase in inert content in the sludge. Sometimes, it is preferable to transfer the entire amount of the thickened sludge during the concentration of the flocculated sludge 14 to the sludge treatment step 8.
以上の実施態様についての説明から本発明にはＵＪ Ｆ
の利点があることがわかる。From the above description of the embodiments, the present invention includes UJ F
It can be seen that there are advantages.
■ げつ気槽汚泥濃度を増加できるので、高負荷処理が
できる。■ The sludge concentration in the sludge tank can be increased, allowing high-load treatment.
げつ気槽汚泥濃度Ｘ５（ｋＩｆ／ｍ”） はほぼ次式
によって決定される。The sludge concentration in the excavation tank X5 (kIf/m'') is approximately determined by the following equation.
ここで。here.
Ｒ： 返送汚泥量 （ｍ３／日）
Ｑ ： 廃水量 （ｍ８／日）
６−
ＸＩＲ： 返送汚泥−Ｉｆ （ｋｔ／ ｍ” ）従来
法による返送汚泥Ｎ−Ｒｊ）０．５Ｑ、 ＸＩＲを１０
ｋｔ／ ｍ”とすると式（１）よりＸ、 ＋ ３．３
ｋｌ／ｖｎ”となる。一方、本発明方法ではＸ５ｘｆ
容易に６０〜９０ ｋｐ／Ｗ１” ＆することができる
。仮にＸ ｓ ｎを７５１ｐ／ｍ”とするき返送汚泥ｉ
１Ｒは 約０．０６７Ｑとなり（分離水は０．４３３Ｑ
）。R: Amount of returned sludge (m3/day) Q: Amount of wastewater (m8/day) 6-
kt/m”, then from equation (1), X, + 3.3
On the other hand, in the method of the present invention, X5xf
It can easily be 60 to 90 kp/W1"&.If Xsn is set to 751p/m", the return sludge i
1R is approximately 0.067Q (separated water is 0.433Q
).
泥負荷は通常一定であるから約１．４倍の容積負荷をと
ることができる。Since the mud load is usually constant, it is possible to take a volume load that is approximately 1.4 times larger.
■ 沈殿槽の水面積負荷が小さくなるので、沈降速度の
小さな汚泥でも固液分離することができる。■ Since the water area load on the sedimentation tank is reduced, solid-liquid separation is possible even with sludge that has a low sedimentation rate.
沈殿槽の水面積をＳ（、″）（！ｌ−シ、上記■の流量
条件で水面積負荷を計算すると従来法がＳ／Ｑであるの
に対し１次式に示す如く本発明法では８／（１−０，４
３３）Ｑ １０．５６７Ｑ となり１＝Ｓ
従来法に比べ （Ｓ１０．５６７Ｑ／）（８／Ｑ、＋１
．８倍−７−
のＩ積負荷をとることができる。逆にいえば従未決と同
一の水面積をもつ沈殿槽で従来の１の沈降速家をもつ汚
泥を固液分離することが可能となる、
■ 特に夏期水温上昇時に腐敗、悪臭を発生する濃縮槽
を削除することができ、さらには従来の濃縮槽０２倍以
上の濃度の汚泥を新鮮な状態で汚泥処理工程に供給する
ことができるので、汚泥処理の点から極ぬで都合がよい
。The water area of the settling tank is S(,'')(!l-shi), and when calculating the water area load under the flow rate conditions of 8/(1-0,4
33) Q 10.567Q, 1=S Compared to the conventional method (S10.567Q/) (8/Q, +1
．． It is possible to take an I product load of 8 times -7-. In other words, it becomes possible to separate solid-liquid sludge that has a settling rate of 1 in the conventional settling tank with the same water area as the settling tank. It is extremely convenient from the viewpoint of sludge treatment, since it is possible to eliminate the tank, and furthermore, it is possible to supply sludge in a fresh state to the sludge treatment process at a concentration more than 2 times that of a conventional thickening tank.
■ 活性汚泥処理では汚泥の膨化により、ばつ気槽の浄
化能が低Ｆするととも化余剰汚泥の濃縮が不可能となっ
て汚泥処理量が極端に増加しなければ汚泥を処理できな
くなるため、膨化時に流入した廃水により増殖した汚泥
が沈殿槽から湿原せざるを得ないという最悪の事態を招
くことがある。本発明では膨化汚泥も速やかに、しかも
高濃度に濃縮できるので、膨化現象が生じても従来法に
比べはるかに良好な処理を行なうこきができる。■ In activated sludge treatment, due to the expansion of sludge, the purification capacity of the aeration tank becomes low F, and it becomes impossible to thicken the excess sludge, making it impossible to process the sludge unless the amount of sludge to be processed increases dramatically. Sometimes, the worst situation can occur when sludge multiplies due to inflowing wastewater and is forced to drain from the settling tank into a marsh. In the present invention, expanded sludge can also be concentrated quickly and to a high concentration, so even if a swelling phenomenon occurs, it can be treated much better than in conventional methods.
しかして上記図示例では凝集処理工程を配備しているが
、これは遠心濃縮機６の遠心分離水９が必ずしも清沿で
なく流量負荷、汚泥負荷によって変わるが、５０〜１０
００＊ｙ／ｌの８８を流出することがあるためである。However, in the illustrated example above, a flocculation treatment step is provided, but this means that the centrifuged water 9 of the centrifugal concentrator 6 is not necessarily pure, but varies depending on the flow rate load and sludge load, but it is 50 to 10
This is because 88 of 00*y/l may flow out.
従来法においては余剰汚泥の濃ａｔｅからの分離水は、
汚泥の滞留時間が長いため汚泥の腐敗等番こより汚濁す
るためばつ気槽３に移送されるか１本発明では遠心分離
水９はそのようなことがないので。In the conventional method, the water separated from the concentrated excess sludge is
Because of the long residence time of the sludge, the sludge is transferred to the aeration tank 3 to become polluted due to rotting, etc. In the present invention, centrifuged water 9 does not cause such problems.
沈殿槽上澄水ｌＯと混合できるため、沈＆！４の水量負
荷を軽減することができる。＃集檜１１には通常硫酸バ
ンド、塩化第２鉄などの無機凝集剤、凝集補助剤として
有機性高分子凝集剤（ポリマー）が使用される。Because it can be mixed with the sedimentation tank supernatant water lO, sedimentation &! The water load of 4 can be reduced. #For the collected Hinoki cypress 11, an inorganic flocculant such as sulfuric acid or ferric chloride, and an organic polymer flocculant (polymer) are used as a flocculation aid.
凝集汚泥分離槽１２としては通常沈殿槽、加圧浮上槽が
採用される。前記遠心濃縮機６による１１に縮汚泥は濃
度が通常６〜９％となるので。As the flocculated sludge separation tank 12, a settling tank or a pressurized flotation tank is usually adopted. The concentration of the reduced sludge produced by the centrifugal thickener 6 is usually 6 to 9%.
その移送用ポンプとしてはスクリューポンプが推奨され
る。これを１０％より高＊ｉに濃縮するためには、遠心
濃縮機６の流量、汚泥負荷を小さくしなければならない
ので処理量が低下す ９−
るとともに、汚泥濃度が高（なり過ぎて汚泥移送、汚泥
脱水時の薬品混合が困難となるので過剰に＃縮すること
は奸才しくない。これらの点を考慮し、濃縮濃度は９ｘ
以下、奸才しくは７Ｘ以Ｆ和度に設定するのがよい。ま
た、凝集汚泥１４を遠心濃縮せずに沈降汚泥器を濃縮し
た汚泥に混入することにより、脱水対象汚泥の濃度を低
下させることができ、薬品混合を円滑に行なうこさがで
きる。A screw pump is recommended as the transfer pump. In order to concentrate this to higher *i than 10%, the flow rate of the centrifugal thickener 6 and the sludge load must be reduced, which reduces the throughput and causes the sludge concentration to become too high. Excessive reduction is unwise as it will be difficult to mix chemicals during transport and sludge dewatering.Taking these points into consideration, the concentration concentration should be set to 9x.
Hereinafter, it is better to set it to 7X or higher for the sake of craftsmanship. Further, by mixing the flocculated sludge 14 into the sludge concentrated by the settling sludge machine without centrifugally concentrating it, the concentration of the sludge to be dewatered can be lowered, and chemicals can be mixed smoothly.
（Ｊ上述べたように本発明によれば、固液分離性。(JAs mentioned above, according to the present invention, solid-liquid separability.
濃縮性の悪め廃水の活性汚泥処理を極めて効率良く行な
うことができる。すなわち１円滑に高負荷の生物処理を
継続するこきができると共に１発生する汚泥の処理も容
易となり、前記した従来法の諸欠点を的確に解消するこ
とができる。Activated sludge treatment of wastewater with poor concentration can be performed extremely efficiently. That is, it is possible to smoothly continue the high-load biological treatment, and it is also easy to treat the generated sludge, thereby accurately eliminating the various drawbacks of the conventional methods described above.
図面は５本発明の一実施態様を示すフローシートである
。
ｌ・・廃水 ３・・・返送汚泥。
３・・・げつ気槽 ４・・・沈降槽−１０−
５・・沈降汚泥 ６・・・遠心濃縮機７・・余
剰汚泥 ８・・・汚泥処理工程９・・遠心分離
水 １Ｇ・・・沈殿槽上澄水１１・・・凝集槽
１２・・凝集汚泥分離槽１３・・・凝集分離水
１４・・・凝集汚泥１！ｓ・・・バイパス。The drawing is a flow sheet showing one embodiment of the present invention. l...Wastewater 3...Return sludge. 3... Aeration tank 4... Sedimentation tank -10- 5... Settling sludge 6... Centrifugal thickener 7... Excess sludge 8... Sludge treatment process 9... Centrifuged water 1G...・Sedimentation tank supernatant water 11... flocculation tank
12... flocculated sludge separation tank 13... flocculated separated water
14...Flocculated sludge 1! s...Bypass.
Claims (1)
らに凝集処理する方法において。 前記沈降分離工程の分離汚泥の少なくとも一部を遠心濃
縮工程で濃縮し、該濃縮汚泥の一部を前記活性汚泥処理
工程へ返送する一方。 前記濃縮汚泥の残部を汚泥処理工程に移送すると共に、
前記遠心濃縮工程分離水を前記沈降分離工程の溢流水と
混合して凝集処理することをｑＩ！微さする廃水の処理
方法。 ２、前記遠心濃縮工程が、該工程により得られる濃縮汚
泥の濃度が９ｙ以下、好ましくは７％以下になるように
行なわれるものである特許請求の範囲第１項記載の方法
。 ３、前記遠心濃縮工程が、前記凝集処理工程による製編
汚泥を処理するものであ゛る特許請求の範囲第１項又は
第２項記載の方法。 ２− ４、前記凝集処理工程が、凝集沈澱法により行なわれる
ものである特許請求の範囲ｔＪｃ１項。 第２項又は第３項記載の方法。 ５、 ＠記活性汚泥処理工程が、ｌ！Ｉ］配沈降分離
工程による分離汚泥の一部を前ｒ遠心濃縮工程で処理す
ることなく直接返送すると共に該遠心濃縮工程による濃
縮汚泥の一部を返送して行なわれるものである特許請求
の範囲第］Ｘ１ｉｌ。 ・第２項、第３項又は第４項記載の方法。[Claims] 1. A method in which wastewater is subjected to activated sludge treatment, followed by sedimentation separation treatment and coagulation treatment. At least a portion of the separated sludge in the sedimentation separation step is concentrated in a centrifugal concentration step, and a portion of the concentrated sludge is returned to the activated sludge treatment step. While transferring the remaining part of the thickened sludge to a sludge treatment process,
qI! The separated water of the centrifugal concentration step is mixed with the overflow water of the sedimentation separation step to perform a flocculation treatment. How to treat wastewater. 2. The method according to claim 1, wherein the centrifugal concentration step is performed such that the concentration of the thickened sludge obtained by the step is 9y or less, preferably 7% or less. 3. The method according to claim 1 or 2, wherein the centrifugal concentration step treats the knitted sludge resulting from the flocculation treatment step. 2-4. Claim tJc1, wherein the aggregation treatment step is carried out by a coagulation-sedimentation method. The method described in paragraph 2 or 3. 5. @The activated sludge treatment process is l! I] A part of the separated sludge from the sedimentation separation process is directly returned without being treated in the pre-centrifugal concentration process, and a part of the concentrated sludge from the centrifugal concentration process is also returned. ] X1il. - The method described in Section 2, Section 3, or Section 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56203405A JPS58104696A (en) | 1981-12-18 | 1981-12-18 | Treatment of waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56203405A JPS58104696A (en) | 1981-12-18 | 1981-12-18 | Treatment of waste water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58104696A true JPS58104696A (en) | 1983-06-22 |
Family
ID=16473507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56203405A Pending JPS58104696A (en) | 1981-12-18 | 1981-12-18 | Treatment of waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58104696A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100397168B1 (en) * | 2001-02-02 | 2003-09-06 | (주)범한엔지니어링 종합건축사 사무소 | Apparatus and Method For Animal Waste water Treatment |
| JP2016504185A (en) * | 2012-11-27 | 2016-02-12 | ハンプトン ローズ サニテーション ディストリクト | Waste water treatment method and apparatus using weight sorting |
| JP2017519630A (en) * | 2014-06-30 | 2017-07-20 | ハンプトン ローズ サニテーション ディストリクト | Wastewater treatment method and apparatus using external sorting |
| US11999641B2 (en) | 2021-03-12 | 2024-06-04 | Hampton Roads Sanitation District | Method and apparatus for multi-deselection in wastewater treatment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466559A (en) * | 1977-11-05 | 1979-05-29 | Mitsubishi Electric Corp | System for controlling sludges to be returned |
| JPS5486952A (en) * | 1977-12-22 | 1979-07-10 | Tomoe Kogyo Kk | Method of controlling sanitary sewage treating device |
| JPS55129089A (en) * | 1979-03-28 | 1980-10-06 | Brother Ind Ltd | Pattern sewing machine |
-
1981
- 1981-12-18 JP JP56203405A patent/JPS58104696A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5466559A (en) * | 1977-11-05 | 1979-05-29 | Mitsubishi Electric Corp | System for controlling sludges to be returned |
| JPS5486952A (en) * | 1977-12-22 | 1979-07-10 | Tomoe Kogyo Kk | Method of controlling sanitary sewage treating device |
| JPS55129089A (en) * | 1979-03-28 | 1980-10-06 | Brother Ind Ltd | Pattern sewing machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100397168B1 (en) * | 2001-02-02 | 2003-09-06 | (주)범한엔지니어링 종합건축사 사무소 | Apparatus and Method For Animal Waste water Treatment |
| JP2016504185A (en) * | 2012-11-27 | 2016-02-12 | ハンプトン ローズ サニテーション ディストリクト | Waste water treatment method and apparatus using weight sorting |
| US10112856B2 (en) | 2012-11-27 | 2018-10-30 | Hampton Roads Sanitation District | Method and apparatus for wastewater treatment using gravimetric selection |
| JP2017519630A (en) * | 2014-06-30 | 2017-07-20 | ハンプトン ローズ サニテーション ディストリクト | Wastewater treatment method and apparatus using external sorting |
| US11999641B2 (en) | 2021-03-12 | 2024-06-04 | Hampton Roads Sanitation District | Method and apparatus for multi-deselection in wastewater treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3368938B2 (en) | Wastewater treatment method and apparatus | |
| JP2796909B2 (en) | Wastewater treatment method | |
| JPS58104696A (en) | Treatment of waste water | |
| JPS6320600B2 (en) | ||
| JPS61185400A (en) | Apparatus for treating excretion sewage | |
| JP3117249B2 (en) | Septic tank sludge treatment method | |
| JPH0649197B2 (en) | Organic wastewater treatment method | |
| JPS60206498A (en) | Treatment of excretion sewage | |
| JPH10314757A (en) | Method for treating sewage turned back water | |
| JP3327979B2 (en) | Septic tank sludge treatment method and equipment | |
| JPH0722756B2 (en) | Biological denitrification and dephosphorization methods for wastewater | |
| JPS59112900A (en) | Treatment of organic waste water | |
| JPH0724834B2 (en) | Wastewater treatment method | |
| JPH03157196A (en) | Treatment of organic sewage | |
| JPH0218155B2 (en) | ||
| JPS6244996B2 (en) | ||
| JPS63221900A (en) | Treatment of excretion-based sewage | |
| JPS5851995A (en) | Treatment of night soil | |
| JPH0471699A (en) | Method for purifying water | |
| JPH07256295A (en) | Treatment of sewage return water | |
| JPS62100494A (en) | Purification of human excretion waste water by solid-liquid separation and organic fertilizer production | |
| JPS5879596A (en) | Treatment for night soil and sludge of septic tank by mixing | |
| JPH02172596A (en) | Treatment of organic sewage | |
| JPS5820290A (en) | Disposition of organic waste water | |
| JPH1052696A (en) | Method for combined treatment of human waste and private sewerage plant sludge |