JP2001225091A - Method and apparatus for treating sewage and sludge - Google Patents
Method and apparatus for treating sewage and sludgeInfo
- Publication number
- JP2001225091A JP2001225091A JP2000041298A JP2000041298A JP2001225091A JP 2001225091 A JP2001225091 A JP 2001225091A JP 2000041298 A JP2000041298 A JP 2000041298A JP 2000041298 A JP2000041298 A JP 2000041298A JP 2001225091 A JP2001225091 A JP 2001225091A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- treatment
- biological treatment
- solubilization
- biological
- 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
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、汚水と汚泥の処理
方法及びその処理装置に関し、特に、下水等の有機性汚
水を活性汚泥により生物学的に処理する汚水と汚泥の処
理方法及びその処理装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for treating sewage and sludge, and more particularly, to a method and apparatus for treating sewage and other organic sewage biologically with activated sludge. It concerns the device.
【０００２】[0002]
【従来の技術】従来、下水等の有機性汚水の処理方法と
して、活性汚泥を用いた生物学的処理方法が知られてい
る。この生物学的処理方法は、汚水を沈砂池、最初沈殿
池等の前処理設備に導き、比重の重いものを沈殿させ、
次いで曝気槽において微生物等からなる活性汚泥によっ
て汚水中の有機物を分解処理するものである。2. Description of the Related Art Hitherto, a biological treatment method using activated sludge has been known as a treatment method for organic wastewater such as sewage. In this biological treatment method, wastewater is guided to pretreatment facilities such as a sand basin and a first sedimentation basin, and sediment with a high specific gravity is settled.
Next, in an aeration tank, organic matter in the sewage is decomposed by activated sludge composed of microorganisms and the like.
【０００３】この生物学的処理方法においては、余剰汚
泥が発生するため、その処理をいかに効率的に低コスト
で行うかが問題となっている。[0003] In this biological treatment method, since excess sludge is generated, there is a problem how to efficiently perform the treatment at low cost.
【０００４】そこで、この余剰汚泥を低コストで効率良
く減容化する方法として特開平７−２４４９９号公報に
記載のものが提供されている。Therefore, as a method for efficiently reducing the volume of this excess sludge at low cost, a method described in JP-A-7-24499 is provided.
【０００５】この減容化方法は、発生する余剰汚泥を
金属イオンを触媒として使用し、酸化反応槽で酸化処理
するもの、又は発生する余剰汚泥を嫌気性消化処理し
たあと、更に酸化反応槽で処理するものである。[0005] This volume reducing method is a method in which the generated excess sludge is oxidized in an oxidation reaction tank using metal ions as a catalyst, or the generated excess sludge is subjected to an anaerobic digestion treatment and then further processed in an oxidation reaction tank. To be processed.
【０００６】また、近年は超臨界水を用いた方法も試み
られている。この方法は、汚泥を水の臨界点（３７４
℃、２２ＭＰａ）以上の高温高圧状態にし、酸素または
空気を供給して汚泥の有機物を酸素と反応させ、完全に
酸化分解するものである。In recent years, a method using supercritical water has been attempted. This method converts the sludge to the critical point of water (374
C., 22 MPa) or higher, and oxygen or air is supplied to cause organic matter in sludge to react with oxygen and completely oxidatively decompose.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
た、の方法では以下のような問題があった。However, the above method has the following problems.
【０００８】まず、の方法では、発生する余剰汚泥を
減容化するために、触媒を使用しているため、別途中和
槽及び沈殿池を設ける必要があり、設置スペースが大き
く、設備コストの高騰を招くという問題があった。In the first method, since a catalyst is used to reduce the volume of excess sludge generated, it is necessary to separately provide a neutralization tank and a sedimentation tank, so that the installation space is large and equipment cost is reduced. There was a problem of soaring.
【０００９】また、の方法では、別途嫌気性消化処理
装置が必要になる上に、その処理により発生するガスの
脱硫装置等が必要となるため、上記の方法と同様に設
備コストの高騰を招くという問題があった。さらに性能
面でも、、とも反応速度が遅く、必ずしも分解効率
が高くないため、未分解な固形物が流出し、水処理工程
において水質が悪化するという問題があった。In addition, the above method requires a separate anaerobic digestion treatment apparatus and a desulfurization apparatus for the gas generated by the treatment, which leads to an increase in equipment costs as in the above method. There was a problem. Further, in terms of performance as well, there is a problem that the reaction rate is low and the decomposition efficiency is not always high, so that undecomposed solids flow out and the water quality is deteriorated in the water treatment step.
【００１０】一方、超臨界水を用いた方法は、短時間で
高い分解性能が得られるものの、処理設備の費用やラン
ニングコストが高く、また、高圧の酸素ガスを用いるた
め安全性や取扱い性の面でも問題があった。[0010] On the other hand, the method using supercritical water can provide high decomposition performance in a short time, but requires high costs for processing equipment and running costs, and uses high-pressure oxygen gas for safety and handling. There was also a problem in terms of aspects.
【００１１】[0011]
【課題を解決するための手段】請求項１に係る発明の汚
水と汚泥の処理方法は、汚水を生物学的に処理しなが
ら、生物分解に伴って発生する余剰汚泥を５０〜３００
℃の温度と０．１〜１０ＭＰａの圧力の組合せにより可
溶化処理した後、この処理物を前記生物処理槽に返送す
ることを特徴とする。この方法によれば、数分〜数時間
以内の短時間で可溶化処理を行うことができ、可溶化効
率も高く、高圧ガスを使用しないため、従来の超臨界水
を用いた方法に比べ、安全かつ低コストで可溶化処理を
行うことができる。According to a first aspect of the present invention, there is provided a method for treating sewage and sludge according to the present invention, wherein excess sludge generated due to biodegradation is removed by 50 to 300 while biologically treating sewage.
After a solubilization treatment by a combination of a temperature of ° C. and a pressure of 0.1 to 10 MPa, the treated product is returned to the biological treatment tank. According to this method, the solubilization treatment can be performed in a short time within several minutes to several hours, the solubilization efficiency is high, and no high-pressure gas is used, so that compared to the conventional method using supercritical water, The solubilization treatment can be performed safely and at low cost.
【００１２】請求項２に係る発明の汚水と汚泥の処理方
法は、前記余剰汚泥を可溶化する前に、当該余剰汚泥の
濃度を調整することを特徴としたもので、濃度を高める
ことにより、低コストで効率的に処理することができ
る。[0012] The method for treating sewage and sludge of the invention according to claim 2 is characterized in that the concentration of the excess sludge is adjusted before the excess sludge is solubilized. Processing can be performed efficiently at low cost.
【００１３】請求項３に係る発明の汚水と汚泥の処理装
置は、排水等を生物処理槽で生物学的に処理するととも
に、生物処理により発生した汚泥を可溶化し、可溶化し
た汚泥を生物反応槽に返送するようにした汚水と汚泥の
処理装置において、余剰汚泥を５０〜３００℃の温度と
０．１〜１０ＭＰａの圧力の組合せにより可溶化処理す
る可溶化処理手段と、該可溶化処理手段による処理物を
前記生物処理槽に返送する返送手段とを設けたことを特
徴とする。この装置によれば、可溶化処理手段により数
分〜数時間以内の短時間で可溶化処理を行うことがで
き、可溶化効率も高く、高圧ガスを使用しないため、従
来の超臨界水を用いた方法に比べ、安全かつ低コストで
可溶化処理を行うことができる。The sewage and sludge treatment apparatus according to the third aspect of the present invention biologically treats wastewater and the like in a biological treatment tank, solubilizes the sludge generated by the biological treatment, and converts the solubilized sludge into biological matter. A solubilization treatment means for solubilizing surplus sludge with a combination of a temperature of 50 to 300 ° C. and a pressure of 0.1 to 10 MPa in a wastewater and sludge treatment apparatus which is returned to the reaction tank; Return means for returning the processed material by the means to the biological treatment tank. According to this apparatus, the solubilization treatment can be performed in a short time within several minutes to several hours by the solubilization treatment means, the solubilization efficiency is high, and high pressure gas is not used. The solubilization treatment can be performed safely and at low cost as compared with the conventional method.
【００１４】請求項４に係る発明の汚水と汚泥の処理装
置は、前記可溶化処理手段の前に、前記余剰汚泥の濃度
を調整する濃度調整手段が設けられたことを特徴とした
もので、濃度を高めることにより、低コストで効率的に
処理することができる。[0014] The apparatus for treating sewage and sludge of the invention according to claim 4 is characterized in that a concentration adjusting means for adjusting the concentration of the excess sludge is provided before the solubilizing treatment means. By increasing the concentration, efficient processing can be performed at low cost.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１は、本発明の処理方法の概略構成を示
している。FIG. 1 shows a schematic configuration of the processing method of the present invention.
【００１７】この汚水と汚泥の処理方法は、生物処理槽
１と、沈殿槽２と、濃度調整手段としての濃縮装置３
と、可溶化処理手段としての可溶化装置４とを備えてな
るものである。The method for treating sewage and sludge includes a biological treatment tank 1, a sedimentation tank 2, and a concentration device 3 as a concentration adjusting means.
And a solubilizing device 4 as a solubilizing means.
【００１８】生物処理槽１は、当該生物処理槽１内に増
殖、保持されている微生物により汚水を分解処理するも
ので、処理しようとする汚水が導入される。The biological treatment tank 1 decomposes sewage by microorganisms multiplied and held in the biological treatment tank 1, and sewage to be treated is introduced.
【００１９】沈殿槽２は、前記生物処理槽１で処理した
汚泥混合液を貯留し、当該混合液中の汚泥を沈殿させる
ためのもので、汚泥の大半は破線で示すように返送汚泥
として前記生物処理槽１に返送されて汚水処理に寄与す
る微生物の量を調整するとともに、残りの汚泥は余剰汚
泥として取り出される。また、この沈殿槽２で汚泥が分
離された上澄水は処理水として越流し、外部に放流され
る。The sedimentation tank 2 is for storing the sludge mixed liquid treated in the biological treatment tank 1 and for sedimenting the sludge in the mixed liquid. Most of the sludge is returned as sludge as shown by a broken line. The amount of microorganisms returned to the biological treatment tank 1 and contributing to wastewater treatment is adjusted, and the remaining sludge is taken out as surplus sludge. The supernatant water from which the sludge has been separated in the sedimentation tank 2 overflows as treated water and is discharged outside.
【００２０】前記濃縮装置３は、前記余剰汚泥を所定の
濃度に濃縮するためのもので、濃縮された余剰汚泥は後
述する可溶化装置４に導入される。The concentrating device 3 is for concentrating the excess sludge to a predetermined concentration, and the concentrated excess sludge is introduced into a solubilizing device 4 described later.
【００２１】前記可溶化装置４は、濃縮処理した余剰汚
泥を生物処理槽１で微生物が分解しやすい状態に処理す
るためのもので、前記余剰汚泥を所定温度及び圧力の下
で処理することでその固形物を液状化するようにしてい
る。The solubilizer 4 is for treating the concentrated excess sludge in a biological treatment tank 1 so that microorganisms can be easily decomposed, and the excess sludge is treated at a predetermined temperature and pressure. The solid is liquefied.
【００２２】次に、このように構成された本発明の汚水
と汚泥の処理方法をさらに詳しく説明する。Next, the method for treating sewage and sludge of the present invention thus constituted will be described in more detail.
【００２３】まず、汚水は生物処理槽１に導入され、こ
の生物処理槽１において微生物により汚水中の有機物が
分解処理される。生物処理された汚水は汚泥混合液とし
て沈殿槽２に導かれ、重力沈降により汚泥が沈殿し、上
澄水は処理水として越流堰からオーバーフローし、消毒
等を行った後、外部に放流される。First, sewage is introduced into the biological treatment tank 1, in which organic substances in the wastewater are decomposed by microorganisms. The biologically treated sewage is guided to the sedimentation tank 2 as a sludge mixture, and the sludge is settled by gravity sedimentation. The supernatant water overflows from the overflow weir as treated water and is discharged to the outside after being disinfected. .
【００２４】一方、沈殿した汚泥の大半は返送汚泥とし
て生物処理槽１に返送することにより、生物処理槽１の
汚泥濃度を適切な範囲に保持する。このような活性汚泥
による生物処理においては、有機物の分解に伴って微生
物の増殖が生じるため、通常はこの汚泥発生量に相当す
る量の汚泥を余剰汚泥として排出するが、本発明の方法
では、発生量に見合った量の汚泥を余剰汚泥として取り
出し、可溶化処理を行う。可溶化に際しては、高濃度に
濃縮した汚泥を処理する方が効率的であることから、濃
縮装置３で所定の適切な濃度に濃縮した後、可溶化装置
４に導くことが好ましいが、条件により濃縮装置４を省
略することも可能である。可溶化装置４に導入された余
剰汚泥は、当該可溶化装置４によって所定の温度及び圧
力の下でその固形物が可溶化、液状化され、再び生物処
理槽１に返送される。このように本発明では、可溶化装
置４で発生する汚泥に相当する量の汚泥を処理し、生物
分解しやすい有機物に変換した後、生物処理槽１に返送
されるため、生物学的に効率良く分解処理が行われる。On the other hand, most of the settled sludge is returned to the biological treatment tank 1 as returned sludge, so that the sludge concentration in the biological treatment tank 1 is maintained in an appropriate range. In biological treatment with such activated sludge, since the growth of microorganisms occurs along with the decomposition of organic matter, usually, an amount of sludge corresponding to the amount of generated sludge is discharged as surplus sludge, but in the method of the present invention, An amount of sludge corresponding to the amount generated is taken out as surplus sludge and solubilized. At the time of solubilization, it is more efficient to treat the sludge concentrated at a high concentration. Therefore, it is preferable that the sludge is concentrated to a predetermined appropriate concentration by the concentration device 3 and then guided to the solubilization device 4. It is also possible to omit the concentrator 4. The excess sludge introduced into the solubilizer 4 is solubilized and liquefied at a predetermined temperature and pressure by the solubilizer 4 and returned to the biological treatment tank 1 again. As described above, according to the present invention, the amount of sludge generated in the solubilizer 4 is treated and converted into organic matter that is easily biodegraded, and then returned to the biological treatment tank 1, so that biological efficiency is improved. Decomposition processing is performed well.
【００２５】一方、表１は、可溶化の条件に関する実施
例を示したもので、温度と圧力の条件を変化させた時
の、固形物濃度の変化を測定したものである。温度のみ
を変化させ、圧力を８．５ＭＰａに設定した条件１〜条
件５において、条件５を除く４条件では、可溶化処理に
よって固定物濃度が１０％以下まで減少している。これ
は、汚泥を構成する微生物の細胞壁が温度と圧力によっ
て破壊され、細胞の内容物が溶出したためで、汚泥の化
学的酸素要求量（ＣＯＤ）は、可溶化処理前は、９９％
が固形性のＣＯＤであったのに対し、処理後のＣＯＤは
大半が溶解性のＣＯＤに変化していた。また、可溶化処
理後の生物学的酸素要求量（ＢＯＤ）も１０００ｍｇ／
ｌ程度の高い値を示し、可溶化処理した汚泥を生物処理
槽１に返送すれば、生物学的に分解容易な有機物に転換
されていることが確認された。On the other hand, Table 1 shows Examples relating to the conditions of solubilization, in which the change in solid concentration when the conditions of temperature and pressure were changed was measured. Under the conditions 1 to 5 in which only the temperature was changed and the pressure was set to 8.5 MPa, in four conditions except the condition 5, the concentration of the immobilized substance was reduced to 10% or less by the solubilization treatment. This is because the cell wall of the microorganisms constituting the sludge was destroyed by the temperature and pressure, and the contents of the cells were eluted. The chemical oxygen demand (COD) of the sludge was 99% before the solubilization treatment.
Was a solid COD, whereas most of the COD after the treatment was changed to a soluble COD. The biological oxygen demand (BOD) after solubilization was also 1000 mg /
When the sludge subjected to the solubilization treatment was returned to the biological treatment tank 1, it was confirmed that the sludge was converted into an organic matter that was easily decomposed biologically.
【００２６】[0026]
【表１】 [Table 1]
【００２７】一方、条件６は、温度は条件３と同じ１０
０℃とし、圧力を０．１ＭＰａに設定したもので、可溶
化の割合は小さく、大半が固形物の状態で残留したが、
数時間の処理を行うと、微生物は安全に死滅し、細胞壁
はもろくて加水分解されやすい状態になっていた。これ
は、細胞を形成する糖分や蛋白質の変性・分解に起因す
るものと考えられ、このような変性・分解を行うには、
少なくとも５０℃以上の温度で処理する必要があり、ま
た、同じ温度条件でも、圧力を大気圧以上に高めること
により、その効果が大きいと考えられる。したがって、
可溶化率が小さい条件５や条件６においても、可溶化処
理した後、これを生物処理槽１に返送すれば、徐々に分
解処理させることが可能であり、可溶化率を考慮して、
１日当たりに発生する汚泥量に対し、可溶化処理する汚
泥の量を多くすることで、全体としてバランスを保つこ
とが可能となる。On the other hand, in the condition 6, the temperature is 10 which is the same as the condition 3.
The temperature was set to 0 ° C. and the pressure was set to 0.1 MPa. The rate of solubilization was small, and most of them remained in a solid state.
After several hours of treatment, the microorganisms were safely killed and the cell walls were fragile and easily hydrolyzed. This is thought to be due to denaturation / degradation of sugars and proteins that form cells.
It is necessary to carry out the treatment at a temperature of at least 50 ° C., and even under the same temperature conditions, it is considered that the effect is great by increasing the pressure to the atmospheric pressure or more. Therefore,
Even under the conditions 5 and 6 where the solubilization rate is small, if the solubilization treatment is performed and then returned to the biological treatment tank 1, the decomposition treatment can be gradually performed.
By increasing the amount of sludge to be solubilized with respect to the amount of sludge generated per day, the balance can be maintained as a whole.
【００２８】可溶化処理の温度と圧力の条件は、種々の
組合せが可能であるが、温度は、５０℃〜３００℃の範
囲に設定するのが望ましい。また、圧力はランニングコ
ストへの影響があまり大きくないことから、０．１ＭＰ
ａ〜１０ＭＰａを適正範囲とし、生物処理槽１の条件、
処理する汚泥量、処理時間等の運転条件と、経済性を考
慮して、温度及び圧力の条件を設定することにより、汚
水の処理に悪影響を及ぼすことなく、安定した余剰汚泥
の可溶化処理を行うことができる。The temperature and pressure conditions for the solubilization treatment can be in various combinations, but the temperature is preferably set in the range of 50 ° C. to 300 ° C. Also, since the pressure does not greatly affect the running cost, the pressure is 0.1MPa.
a to 10 MPa in an appropriate range, the conditions of the biological treatment tank 1,
By setting the temperature and pressure conditions in consideration of the operating conditions such as the amount of sludge to be treated, the treatment time, and economics, stable solubilization of excess sludge can be performed without adversely affecting the treatment of wastewater. It can be carried out.
【００２９】[0029]
【発明の効果】以上述べたように、本発明の汚水と汚泥
の処理方法及びその処理装置によれば、可溶化装置によ
り余剰汚泥を微生物が分解し易い状態に処理した後に、
当該生物処理槽に返送し、分解処理を行うため、最終的
に外部に排出され焼却処理等が行われる汚泥の量をゼロ
または最小限の量に減少させることができるため、汚泥
の処理処分にかかるコストを大幅に低減させることがで
きる。また、従来の超臨界水を用いた方法のように高圧
のガスを用いる必要がないため、より安全に低コストで
処理できるという利点がある。As described above, according to the method and apparatus for treating sewage and sludge of the present invention, after the excess sludge is treated by the solubilization apparatus so that microorganisms are easily decomposed,
The sludge is returned to the biological treatment tank and decomposed, so that the amount of sludge finally discharged to the outside and incinerated can be reduced to zero or to a minimum. Such costs can be significantly reduced. Further, since there is no need to use a high-pressure gas unlike the conventional method using supercritical water, there is an advantage that the treatment can be performed more safely and at low cost.
【図１】本発明の汚水と汚泥の処理方法の概略構成を示
す図である。FIG. 1 is a diagram showing a schematic configuration of a method for treating wastewater and sludge of the present invention.
１ 生物処理槽 ２ 沈殿槽 ３ 濃縮装置 ４ 可溶化装置 DESCRIPTION OF SYMBOLS 1 Biological treatment tank 2 Sedimentation tank 3 Concentrator 4 Solubilizer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 吉田 輝久 兵庫県尼崎市下坂部３丁目11番１号 日立 機電工業株式会社内 (72)発明者 山下 富和 兵庫県西宮市田近野町６番107号 新明和 工業株式会社開発センタ内 (72)発明者 古塚 毅士 兵庫県西宮市田近野町６番107号 新明和 工業株式会社開発センタ内 Ｆターム(参考） 4D028 BC18 BD11 BD16 4D059 AA05 BK12 EB01 EB06 EB20 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Teruhisa Yoshida 3-1-1, Shimosakabe, Amagasaki City, Hyogo Prefecture Inside Hitachi Kiden Kogyo Co., Ltd. (72) Inventor Tomiwa Yamashita 6 107 Takinocho, Nishinomiya City, Hyogo No. Shinmeiwa Industry Co., Ltd. Development Center (72) Inventor Takeshi Furusuka 6-107 Takinocho, Nishinomiya City, Hyogo Prefecture Shinmeiwa Industry Co., Ltd. Development Center F term (reference) 4D028 BC18 BD11 BD16 4D059 AA05 BK12 EB01 EB06 EB20
Claims (4)
るとともに、生物処理により発生した汚泥を可溶化し、
可溶化した汚泥を生物反応槽に返送するようにした汚水
と汚泥の処理方法において、余剰汚泥を５０〜３００℃
の温度と０．１〜１０ＭＰａの圧力の組合せにより可溶
化処理した後、この処理物を前記生物処理槽に返送する
ことを特徴する汚水と汚泥の処理方法。1. Biological treatment of waste water and the like in a biological treatment tank, solubilization of sludge generated by biological treatment,
In a method for treating sewage and sludge in which solubilized sludge is returned to a biological reaction tank, excess sludge is treated at 50 to 300 ° C.
A method for treating sewage and sludge, comprising subjecting a solubilization treatment to a combination of a temperature of 0.1 MPa and a pressure of 0.1 to 10 MPa, and then returning the treated product to the biological treatment tank.
該余剰汚泥の濃度を調整することを特徴とする請求項１
記載の汚水と汚泥の処理方法。2. The method according to claim 1, wherein the concentration of the excess sludge is adjusted before solubilizing the excess sludge.
The method for treating sewage and sludge as described.
るとともに、生物処理により発生した汚泥を可溶化し、
可溶化した汚泥を生物反応槽に返送するようにした汚水
と汚泥の処理装置において、 余剰汚泥を５０〜３００℃の温度と０．１〜１０ＭＰａ
の圧力の組合せにより可溶化処理する可溶化処理手段
と、該可溶化処理手段による処理物を前記生物処理槽に
返送する返送手段とを設けたことを特徴とする汚水と汚
泥の処理装置。3. Biological treatment of wastewater and the like in a biological treatment tank, solubilization of sludge generated by biological treatment,
In a wastewater and sludge treatment apparatus in which the solubilized sludge is returned to the biological reaction tank, the excess sludge is cooled to a temperature of 50 to 300 ° C and 0.1 to 10 MPa.
Wastewater and sludge treatment apparatus, comprising: a solubilization treatment means for solubilizing treatment by a combination of the pressures described above; and a return means for returning a treatment product by the solubilization treatment means to the biological treatment tank.
泥の濃度を調整する濃度調整手段が設けられたことを特
徴とする請求項３記載の汚水と汚泥の処理装置。4. The apparatus for treating sewage and sludge according to claim 3, wherein a concentration adjusting means for adjusting the concentration of the excess sludge is provided before the solubilization processing means.
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| JP2000041298A JP2001225091A (en) | 2000-02-18 | 2000-02-18 | Method and apparatus for treating sewage and sludge |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026774A1 (en) | 2002-09-02 | 2004-04-01 | Koga, Takeshi | Method of reducing volume of sludge and apparatus therefor |
| JP2005199258A (en) * | 2003-12-16 | 2005-07-28 | Kurita Water Ind Ltd | Anaerobic digestion treatment apparatus of organic waste solution |
| JP2008119655A (en) * | 2006-11-15 | 2008-05-29 | Nittetsu Kankyo Engineering Kk | Organic waste water treatment method and chemical used for this method |
-
2000
- 2000-02-18 JP JP2000041298A patent/JP2001225091A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004026774A1 (en) | 2002-09-02 | 2004-04-01 | Koga, Takeshi | Method of reducing volume of sludge and apparatus therefor |
| EP1550638A1 (en) * | 2002-09-02 | 2005-07-06 | Koga, Takeshi | Method of reducing volume of sludge and apparatus therefor |
| CN1328193C (en) * | 2002-09-02 | 2007-07-25 | 古贺健 | Method of reducing volume of sludge and apparatus therefor |
| US7258791B2 (en) | 2002-09-02 | 2007-08-21 | Takeshi Koga | Method of reducing volume of sludge |
| US7438805B2 (en) | 2002-09-02 | 2008-10-21 | Takeshi Koga | Apparatus for reducing volume of sludge |
| EP1550638A4 (en) * | 2002-09-02 | 2009-09-16 | Koga Takeshi | Method of reducing volume of sludge and apparatus therefor |
| JP2005199258A (en) * | 2003-12-16 | 2005-07-28 | Kurita Water Ind Ltd | Anaerobic digestion treatment apparatus of organic waste solution |
| JP4507712B2 (en) * | 2003-12-16 | 2010-07-21 | 栗田工業株式会社 | Anaerobic digester for organic waste liquid |
| JP2008119655A (en) * | 2006-11-15 | 2008-05-29 | Nittetsu Kankyo Engineering Kk | Organic waste water treatment method and chemical used for this method |
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