JPH0565239B2 - - Google Patents
Info
- Publication number
- JPH0565239B2 JPH0565239B2 JP1163716A JP16371689A JPH0565239B2 JP H0565239 B2 JPH0565239 B2 JP H0565239B2 JP 1163716 A JP1163716 A JP 1163716A JP 16371689 A JP16371689 A JP 16371689A JP H0565239 B2 JPH0565239 B2 JP H0565239B2
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- separated liquid
- septic tank
- liquid
- concentrated
- 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 - Lifetime
Links
- 239000010802 sludge Substances 0.000 claims description 43
- 239000007788 liquid Substances 0.000 claims description 40
- 238000011282 treatment Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 15
- 238000000926 separation method Methods 0.000 claims description 8
- 229920000620 organic polymer Polymers 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims 1
- 229920006317 cationic polymer Polymers 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000005273 aeration Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 229920006318 anionic polymer Polymers 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004065 wastewater treatment 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
Description
〔産業上の利用分野〕
本発明は、浄化槽汚泥の処理方法に関するもの
である。
〔従来の技術〕
従来、浄化槽汚泥の処理は、通常の廃水処理方
法とは異なり、要すれば前曝気し、その後固液分
離し、分離汚泥を脱水し、分離液を活性汚泥処理
する方法が主流になつていた。
しかしながら、活性汚泥処理法は施設が大規模
になるうえに運転が繁雑なため、前記分離液の処
理方法として粒状媒体の充填層を用いた生物処理
方法が検討されるに至つた。
〔発明が解決しようとする課題〕
ところで、前記のように分離液を粒状媒体の充
填層を用いた生物処理方法で処理することは、設
備の節減と運転の簡易化をはかることができる反
面、粒状媒体の充填層に微生物等が短期間に多量
に付着してろ抗が上昇し、遂には充填層を閉塞す
るに至るため、適宜充填層を逆洗したり、あるい
は粒状媒体を取り出して擦洗しているが、付着物
の剥離は容易ではなく、十分に取り去ることが困
難であるという問題点があつた。
本発明は、粒状媒体の充填層を用いた生物処理
で浄化槽汚泥の分離液を処理する際の前記問題点
を解決し、浄化槽汚泥処理設備のコンパクト化と
運転の簡便化を可能にする浄化槽汚泥の処理方法
を提供することを目的とするものである。
〔課題を解決するための手段〕
本発明は、浄化槽汚泥に有機性高分子凝集剤を
添加し、濃縮して濃縮汚泥と濃縮分離液とに分離
し、該濃縮分離液に浄化槽汚泥の一部、無機凝集
剤の少なくとも一つを添加し、濃縮分離液中に残
留する有機性高分子凝集剤を不溶化したのち固液
分離し、該固液分離液を粒状媒体の充填層を用い
た生物処理工程で処理する一方、前記濃縮汚泥を
脱水し、得られた脱水分離液を前記浄化槽汚泥に
混合することを特徴とする浄化槽汚泥の処理方法
であり、また前記生物処理工程で硝化、脱窒処理
を行うことを特徴とする浄化槽汚泥の処理方法で
もある。
〔作用〕
本発明の作用を、一実施態様を示す図面を参照
しながら説明すれば、第１図において、粗大夾雑
物が除去された浄化槽汚泥１は、後述する沈殿槽
１２の分離汚泥２と共に曝気槽３に導入され、酸
素含有ガス４によつて酸化されたのち、カチオン
性ポリマー（有機性高分子凝集剤）５が添加され
て凝集槽６で凝集されたのち、濃縮槽７で濃縮さ
れ、濃縮汚泥８と濃縮分離液９とに分離される。
なお、濃縮手段としては、濃縮槽７の代りにス
クリーン、遠心濃縮機などの公知の機械式濃縮装
置を用いることもできる。
濃縮分離液９中にはカチオン性ポリマーが残留
しており、このカチオン性ポリマーを吸着するた
めに、濃縮分離液９に曝気槽３から流出する浄化
槽汚泥（曝気槽３に導入される浄化槽汚泥１でも
良い）の一部１０と無機凝集剤１１のいずれか、
あるいは両者を添加、混合すると、汚泥あるいは
生成したフロツクにカチオン性ポリマーが吸着さ
れ、沈殿槽１２で分離される。この沈殿槽１２で
分離された分離汚泥２は前述のように曝気槽３に
導かれる。
なお、沈殿槽１２に流入する濃縮分離液９に、
さらにアニオン性ポリマーあるいはノニオン性ポ
リマー１３を添加すると、残留カチオン性ポリマ
ーを吸着した汚泥あるいはフロツクを凝集状態が
良好になり、沈殿槽１２におけるそれらの沈降性
が増進される。ただし、アニオン性ポリマーある
いはノニオン性ポリマー１３の添加は、沈降性増
進のためのものなので、その添加量は１〜２mg／
程度の微量でよく、生物処理塔１５を閉塞する
原因にはならない。
かくて残留カチオン性ポリマーが除去された沈
殿分離液１４は生物処理塔１５に導かれて酸素含
有ガス４が吹き込まれて生物処理され、処理水１
６となつて系外に流出する。
一方、前記の濃縮槽７で濃縮分離された濃縮汚
泥８は、脱水機１８に導かれて脱水処理される
が、脱水の直前にさらにカチオン性ポリマーを添
加する方が確実に脱水処理を行うことができる。
この脱水処理で得られた脱水分離液１９は曝気槽
３に移送され、浄化槽汚泥１と混合され、脱水分
離液１９中に残留するカチオン性ポリマーは汚泥
に付着し、前述のように一連の処理工程で処理さ
れる。また、脱水機１８における濃縮汚泥８の脱
水処理に際しては、前記沈澱槽１２からの分離汚
泥２を曝気槽３に導くことなく、濃縮汚泥８と一
緒に脱水してもよい。
生物処理塔１５の一例について、その詳細をさ
らに第２図を参照して説明すれば、沈殿槽１２か
らの沈殿分離液１４は生物処理塔１５内に導か
れ、砂利などの支持層２０で支持されているアン
スラサイトなどの生物付着用粒状媒体の充填層２
１を通過する間に、支持層２０内の曝気用空気管
２２から吹き込まれる空気（酸素含有ガス）４に
よつて充填層２１は好気的条件に保たれているた
めに、沈殿分離液１４中のBOD成分は粒状媒体
表面に付着しているBOD酸化菌によつて酸化分
解され、同時に沈殿分離液１４中のSS（浮遊物）
も充填層２１でろ過され、処理水１６となつて支
持層２０内の処理水流出管２３から流出する。
このようにして生物処理される沈殿分離液１４
は、前述したように、カチオン性ポリマー添加に
よつて濃縮槽７でSSの大部分が除去され、さら
に残留するカチオン性ポリマーが除去されている
から、充填層２１への付着物の急激な増大がな
く、ろ抗の上昇率が低く、長時間にわたつて生物
処理を継続することができ、また後述する充填層
２１の逆洗も効果的に行うことがでる。
また、前記生物処理を続けているうちに、同時
に行われるろ過作用と相俊つて充填層２１のろ抗
が高まるから、充填層２１の逆洗を行う必要があ
る。充填層２１の逆洗は、沈殿分離液１４の流入
を止め、支持層２０内の空洗管２４から空気、ま
たは洗浄水管２５から処理水流出管２３を経て洗
浄水、あるいはこれらの両者を同時に噴出して充
填層２１を撹乱しながら粒状媒体の付着物を剥離
し、その逆洗排水１７は塔上部の越流トラフ２６
を経て逆洗排水管２７から、また中間排水管２８
からも排出される。この逆洗排水１７は逆洗によ
つて同伴される付着物その他の余剰汚泥を含有し
ており、濃縮槽７からの濃縮分離液９中に返送、
混合されて処理される（第１図参照）。
さらに、処理すべき浄化槽汚泥１中の窒素成分
を除去する場合には、生物処理塔１５でBOD酸
化、ろ過と同時に生物学的硝化脱窒処理を行うこ
とが好ましい。例えば、生物処理塔１５を３塔に
して直列に沈殿分離液１４を流過させ、その第１
塔でBOD酸化と共にNH3−ＮをNOx−Ｎに硝化
し、第２塔で脱窒剤（水素供与体）を添加して
NOx−ＮをN2に還元分解し、次に第３塔で残留
脱窒剤の酸化処理を行うようにする。
〔実施例〕
カチオン性ポリマー５mg／が残留している濃
縮分離液にFeCl3、浄化槽汚泥等を添加混合した
のち、さらにアニオン性ポリマー１mg／を添加
し、沈殿槽で沈殿分離し、その沈殿分離液を第２
図に示したような生物処理塔に下向流で通液し
た。その時の条件は次のとおりであつた。
濃縮分離液水質（平均）：BOD190mg／、
SS62mg／、
カチオン性ポリマー５mg／
濃縮分離液処理量：5.1m3／日
沈殿槽容積：直径7.0ｍ、
深さ1.2ｍ
生物処理塔、
容積：直径0.4ｍ、
高さ5.0ｍ
充填層：アンスラサイト粒径３mm
層厚2000mm
また、前記FeCl3等の添加条件を表−１に示
す。
[Industrial Field of Application] The present invention relates to a method for treating septic tank sludge. [Prior art] Conventionally, treatment of septic tank sludge is different from ordinary wastewater treatment methods, and the method is to perform pre-aeration if necessary, then perform solid-liquid separation, dewater the separated sludge, and treat the separated liquid with activated sludge. It had become mainstream. However, since the activated sludge treatment method requires a large-scale facility and is complicated to operate, a biological treatment method using a packed bed of granular media has been considered as a method for treating the separated liquid. [Problems to be Solved by the Invention] By the way, treating the separated liquid with a biological treatment method using a packed bed of granular media as described above can save equipment and simplify operation, but on the other hand, A large amount of microorganisms etc. adhere to the granular media packed bed in a short period of time, increasing the filtration resistance and eventually clogging the packed bed. Therefore, the packed bed should be backwashed as appropriate, or the granular media should be taken out and scrubbed. However, there was a problem in that it was not easy to peel off the deposits and it was difficult to remove them sufficiently. The present invention solves the above-mentioned problems when treating separated liquid of septic tank sludge by biological treatment using a packed bed of granular media, and makes it possible to downsize septic tank sludge treatment equipment and simplify its operation. The purpose is to provide a processing method for [Means for Solving the Problems] The present invention involves adding an organic polymer flocculant to septic tank sludge, concentrating it and separating it into a concentrated sludge and a concentrated separated liquid, and adding a part of the septic tank sludge to the concentrated separated liquid. , at least one inorganic flocculant is added to insolubilize the organic polymer flocculant remaining in the concentrated separated liquid, followed by solid-liquid separation, and the solid-liquid separated liquid is subjected to biological treatment using a packed bed of granular media. A method for treating septic tank sludge, which is characterized in that the thickened sludge is dehydrated and the obtained dehydrated separated liquid is mixed with the septic tank sludge, and the biological treatment process includes nitrification and denitrification treatment. It is also a method for treating septic tank sludge. [Operation] To explain the operation of the present invention with reference to the drawings showing one embodiment, in FIG. After being introduced into an aeration tank 3 and oxidized by an oxygen-containing gas 4, a cationic polymer (organic polymer flocculant) 5 is added and flocculated in a flocculation tank 6, and then concentrated in a concentration tank 7. The sludge is separated into a concentrated sludge 8 and a concentrated separated liquid 9. Note that, as the concentration means, a known mechanical concentration device such as a screen or a centrifugal concentrator may be used instead of the concentration tank 7. A cationic polymer remains in the concentrated separated liquid 9, and in order to adsorb this cationic polymer, the septic tank sludge flowing out from the aeration tank 3 (septic tank sludge 1 introduced into the aeration tank 3) is added to the concentrated separated liquid 9. Either part 10 of (may be) and inorganic flocculant 11,
Alternatively, when both are added and mixed, the cationic polymer is adsorbed to the sludge or the generated floc, and separated in the settling tank 12. The separated sludge 2 separated in the settling tank 12 is led to the aeration tank 3 as described above. In addition, in the concentrated separated liquid 9 flowing into the settling tank 12,
Furthermore, when an anionic polymer or nonionic polymer 13 is added, the sludge or flocs that have adsorbed the residual cationic polymer are brought into a good flocculation state, and their sedimentation in the settling tank 12 is enhanced. However, since the addition of anionic polymer or nonionic polymer 13 is to enhance sedimentation, the amount added is 1 to 2 mg/
A very small amount is sufficient and will not cause clogging of the biological treatment tower 15. The precipitated separated liquid 14 from which the residual cationic polymer has been removed is led to a biological treatment tower 15, where oxygen-containing gas 4 is blown into it for biological treatment, and treated water 1
6 and flows out of the system. On the other hand, the thickened sludge 8 that has been concentrated and separated in the thickening tank 7 is led to the dehydrator 18 and dehydrated, but it is better to add a cationic polymer immediately before dewatering to ensure that the dewatering process is carried out more reliably. I can do it.
The dehydrated separated liquid 19 obtained through this dehydration treatment is transferred to the aeration tank 3 and mixed with the septic tank sludge 1, and the cationic polymer remaining in the dehydrated separated liquid 19 adheres to the sludge, and a series of treatments are carried out as described above. processed in the process. Further, when dewatering the thickened sludge 8 in the dehydrator 18, the separated sludge 2 from the settling tank 12 may be dewatered together with the thickened sludge 8 without being introduced to the aeration tank 3. An example of the biological treatment tower 15 will be further described in detail with reference to FIG. Packed bed of granular media for biofouling such as anthracite 2
1, the packed bed 21 is maintained in an aerobic condition by the air (oxygen-containing gas) 4 blown from the aeration air pipe 22 in the support layer 20. The BOD components inside are oxidized and decomposed by BOD oxidizing bacteria attached to the surface of the granular medium, and at the same time SS (suspended matter) in the precipitated separation liquid 14 is
The water is also filtered through the packed bed 21 and becomes treated water 16, which flows out from the treated water outflow pipe 23 in the support layer 20. Precipitated separation liquid 14 subjected to biological treatment in this way
As mentioned above, most of the SS is removed in the concentration tank 7 by the addition of the cationic polymer, and the remaining cationic polymer is also removed, so there is a rapid increase in the amount of deposits on the packed bed 21. The rate of increase in filtration resistance is low, the biological treatment can be continued for a long time, and the packed bed 21, which will be described later, can be effectively backwashed. Further, as the biological treatment continues, the filtration resistance of the packed bed 21 increases in conjunction with the filtration action that is performed simultaneously, so it is necessary to backwash the packed bed 21. Backwashing of the packed bed 21 is performed by stopping the inflow of the precipitated separation liquid 14 and supplying air from the air washing pipe 24 in the support layer 20, washing water from the washing water pipe 25 through the treated water outflow pipe 23, or both at the same time. It ejects and disturbs the packed bed 21 while peeling off the deposits of granular media, and the backwash waste water 17 is sent to the overflow trough 26 at the top of the tower.
From the backwash drain pipe 27 through the intermediate drain pipe 28
It is also emitted from This backwash wastewater 17 contains deposits and other excess sludge entrained by backwashing, and is returned to the concentrated separated liquid 9 from the thickening tank 7.
Mixed and processed (see Figure 1). Furthermore, when removing nitrogen components from the septic tank sludge 1 to be treated, it is preferable to perform biological nitrification and denitrification treatment simultaneously with BOD oxidation and filtration in the biological treatment tower 15. For example, the biological treatment tower 15 may be made into three towers, the precipitate separation liquid 14 may be passed through in series, and the first
The tower oxidizes BOD and nitrates NH 3 -N to NO x -N, and the second tower adds a denitrifying agent (hydrogen donor).
NO x -N is reduced and decomposed to N 2 , and then the remaining denitrifying agent is oxidized in the third column. [Example] FeCl 3 , septic tank sludge, etc. were added to and mixed with the concentrated separated liquid in which 5 mg of cationic polymer remained, and then 1 mg of anionic polymer was added and separated by precipitation in a settling tank. Add the liquid to the second
The liquid was passed through a biological treatment tower as shown in the figure in a downward flow. The conditions at that time were as follows. Concentrated separated liquid water quality (average): BOD 190 mg/, SS 62 mg/, cationic polymer 5 mg/ Concentrated separated liquid processing amount: 5.1 m 3 /day Sedimentation tank volume: Diameter 7.0 m, depth 1.2 m Biological treatment tower, volume: Diameter 0.4 m, height 5.0m Filled bed: Anthracite grain size 3mm Layer thickness 2000mm Table 1 shows the conditions for adding FeCl 3 and the like.
以上述べたように本発明によれば、粒状媒体の
充填層を用いた生物処理工程で浄化層汚泥を処理
する場合の問題点であるろ抗の急激な上昇と逆洗
の困難性を解決し、浄化槽汚泥処理設備をコンパ
クト化し、簡便な運転を可能にするものである。
As described above, according to the present invention, the problems of rapid increase in filtration resistance and difficulty in backwashing, which are problems when treating septic layer sludge in a biological treatment process using a packed bed of granular media, can be solved. This makes the septic tank sludge treatment equipment more compact and easier to operate.
第１図は本発明の一実施態様を示す系統説明
図、第２図は生物処理塔の構成説明図、第３図は
各実験例に対する生物処理塔における通液時間と
ろ抗との関係、及び逆洗時期とその効果を示す線
図である。
１……浄化槽汚泥、２……分離汚泥、３……曝
気槽、４……酸素含有ガス、５……カチオン性ポ
リマー、６……凝集槽、７……濃縮槽、８……濃
縮汚泥、９……濃縮分離液、１０……浄化槽汚泥
の一部、１１……無機凝集剤、１２……沈殿槽、
１４……沈殿分離液、１５……生物処理塔、１６
……処理水、１７……逆洗排水、１８……脱水
機、１９……脱水分離液、２０……支持層、２１
……充填層、２２……曝気用空気管、２３……処
理水流出管、２４……空洗管、２５……洗浄水
管、２６……越流トラフ、２７……逆洗排水管、
２８……中間排水管。
FIG. 1 is a system explanatory diagram showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of the configuration of a biological treatment tower, and FIG. 3 is a diagram showing the relationship between liquid passage time and filtration in the biological treatment tower for each experimental example, and It is a diagram showing backwashing timing and its effects. 1... Septic tank sludge, 2... Separated sludge, 3... Aeration tank, 4... Oxygen-containing gas, 5... Cationic polymer, 6... Coagulation tank, 7... Thickening tank, 8... Thickened sludge, 9... Concentrated separated liquid, 10... Part of septic tank sludge, 11... Inorganic flocculant, 12... Sedimentation tank,
14...Precipitation separation liquid, 15...Biological treatment tower, 16
... Treated water, 17 ... Backwash wastewater, 18 ... Dehydrator, 19 ... Dehydrated separated liquid, 20 ... Support layer, 21
... Filled bed, 22 ... Air pipe for aeration, 23 ... Treated water outflow pipe, 24 ... Air washing pipe, 25 ... Washing water pipe, 26 ... Overflow trough, 27 ... Backwash drain pipe,
28...Intermediate drain pipe.
Claims (1)
濃縮して濃縮汚泥と濃縮分離液とに分離し、該濃
縮分離液に浄化槽汚泥の一部、無機凝集剤の少な
くとも一つを添加し、濃縮分離液中に残留する有
機性高分子凝集剤を不溶化したのち固液分離し、
該固液分離液を粒状媒体の充填層を用いた生物処
理工程で処理する一方、前記濃縮汚泥を脱水し、
得られた脱水分離液を前記浄化槽汚泥に混合する
ことを特徴とする浄化槽汚泥の処理方法。 ２ 前記生物処理工程で硝化、脱窒処理を行うこ
とを特徴とする請求項１記載の浄化槽汚泥の処理
方法。[Claims] 1. Adding an organic polymer flocculant to septic tank sludge,
Concentrate and separate into concentrated sludge and concentrated separated liquid, add a part of the septic tank sludge and at least one inorganic flocculant to the concentrated separated liquid, and remove the organic polymer flocculant remaining in the concentrated separated liquid. After insolubilization, solid-liquid separation is carried out,
While treating the solid-liquid separated liquid in a biological treatment process using a packed bed of granular media, dewatering the thickened sludge,
A method for treating septic tank sludge, comprising mixing the obtained dehydrated separated liquid with the septic tank sludge. 2. The method for treating septic tank sludge according to claim 1, wherein nitrification and denitrification treatments are performed in the biological treatment step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1163716A JPH0330900A (en) | 1989-06-28 | 1989-06-28 | Treatment of sludge of purifying tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1163716A JPH0330900A (en) | 1989-06-28 | 1989-06-28 | Treatment of sludge of purifying tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0330900A JPH0330900A (en) | 1991-02-08 |
| JPH0565239B2 true JPH0565239B2 (en) | 1993-09-17 |
Family
ID=15779289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1163716A Granted JPH0330900A (en) | 1989-06-28 | 1989-06-28 | Treatment of sludge of purifying tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0330900A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4839645B2 (en) * | 2005-03-17 | 2011-12-21 | Ｊｆｅエンジニアリング株式会社 | Method and apparatus for treating human waste sewage |
| JP5685265B2 (en) | 2009-12-01 | 2015-03-18 | リ、ジンミン | Sludge treatment method using sludge biological treatment method, and sludge treatment apparatus and apparatus |
| CN102674650A (en) * | 2011-03-10 | 2012-09-19 | 苏州波塞顿节能环保工程有限公司 | Low-pollution and low-cost sludge treatment device |
| JP6193716B2 (en) * | 2013-10-11 | 2017-09-06 | 水ｉｎｇ株式会社 | Organic wastewater treatment method and apparatus, and chemical fertilizer manufacturing method and apparatus |
-
1989
- 1989-06-28 JP JP1163716A patent/JPH0330900A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0330900A (en) | 1991-02-08 |
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