JPS63236596A - Treatment of waste water with activated sludge - Google Patents
Treatment of waste water with activated sludgeInfo
- Publication number
- JPS63236596A JPS63236596A JP62070974A JP7097487A JPS63236596A JP S63236596 A JPS63236596 A JP S63236596A JP 62070974 A JP62070974 A JP 62070974A JP 7097487 A JP7097487 A JP 7097487A JP S63236596 A JPS63236596 A JP S63236596A
- Authority
- JP
- Japan
- Prior art keywords
- activated sludge
- wastewater
- aeration
- treatment
- shaped
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 168
- 239000002351 wastewater Substances 0.000 title claims abstract description 96
- 239000000919 ceramic Substances 0.000 claims abstract description 96
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 15
- 239000001301 oxygen Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 60
- 239000003344 environmental pollutant Substances 0.000 claims description 19
- 231100000719 pollutant Toxicity 0.000 claims description 19
- 239000000969 carrier Substances 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 7
- 239000000571 coke Substances 0.000 claims description 6
- 244000005700 microbiome Species 0.000 claims description 5
- 230000033116 oxidation-reduction process Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims 1
- 238000005273 aeration Methods 0.000 abstract description 93
- 239000010865 sewage Substances 0.000 abstract description 10
- 239000002893 slag Substances 0.000 abstract description 2
- 238000010899 nucleation Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 48
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- 238000012545 processing Methods 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 7
- 238000000855 fermentation Methods 0.000 description 7
- 230000004151 fermentation Effects 0.000 description 7
- 239000008187 granular material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000004065 wastewater treatment Methods 0.000 description 7
- 238000005842 biochemical reaction Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010304 firing Methods 0.000 description 6
- 238000007667 floating Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- -1 diatomaceous earth Chemical compound 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000004927 clay Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920000620 organic polymer Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- 239000005909 Kieselgur Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000003100 immobilizing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 241000050850 Quercus nigra Species 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000012050 conventional carrier Substances 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 235000012041 food component Nutrition 0.000 description 1
- ZMZDMBWJUHKJPS-UHFFFAOYSA-N hydrogen thiocyanate Natural products SC#N ZMZDMBWJUHKJPS-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100001239 persistent pollutant Toxicity 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000011269 tar Substances 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
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は廃水の活性汚泥処理方法に関するもので、更に
詳述すると廃水の活性汚泥処理方法において活性汚泥の
固定化担体として高炉水砕を含有する特定形状のセラミ
ックスを用いて活性汚泥処理を行う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 treating wastewater with activated sludge, and more specifically, in a method for treating wastewater with activated sludge, a method for treating wastewater with blast furnace granules as an immobilization carrier for activated sludge. The present invention relates to a method of performing activated sludge treatment using ceramics having a specific shape.
（従来の技術）
一般に、産業廃水（廃水と略記）の活性汚泥処理は次の
ように行われている。廃水から粗大な浮遊物質、油、タ
ール、活性汚泥に対して有害な物質等の大ｆｆ１Ｓ分を
除去した後、活性汚泥処理設備の曝気槽において廃水の
汚濁物を活性汚泥により分解し、次の汚泥沈降槽におい
て活性汚泥の沈降分離を行い、上澄水は処理水として放
流されている。(Prior Art) Generally, activated sludge treatment of industrial wastewater (abbreviated as wastewater) is performed as follows. After removing large ff1S of coarse suspended solids, oil, tar, and substances harmful to activated sludge from the wastewater, the wastewater pollutants are decomposed by the activated sludge in the aeration tank of the activated sludge treatment equipment, and the following Activated sludge is separated by sedimentation in a sludge settling tank, and the supernatant water is discharged as treated water.
一方、汚泥沈降槽においで沈降した活性汚泥は返送汚泥
として曝気槽に戻し、また一部は余剰汚泥として抜取り
メタン発酵、焼却処理等によって処分されている。On the other hand, the activated sludge that has settled in the sludge settling tank is returned to the aeration tank as return sludge, and a portion is extracted as surplus sludge and disposed of by methane fermentation, incineration, etc.
このような廃水の活性汚泥処理１こは多くの問題点が存
在している０例えば、微生物の集合体である活性汚泥は
沈降性の指標であるＳ Ｖ Ｉ （Ｓ ＪｕｄｇｅＶ
ｏｌｕｍｅ ｒ ｎｄｅｘ）が高く、汚泥沈降槽におい
て圧密性の良好な汚泥が得られ難く、また高負荷処理、
負荷変動が大きい処理を行ったり、あるいは活性汚泥に
糸状菌が発生すると活性汚泥がバルキング状態になり沈
降不良になる。従って、従来の廃水の１１ｑ性汚泥処理
においては曝気槽の活性汚泥を高濃度に維持するのが困
難であり、このため高負荷処理、処理時間の短縮、処理
設備のコンパクト化等による処理効率の向上に限界があ
り、またバルキングが発生すると活性汚泥が汚泥沈降槽
より流出し、処理水質の悪化を招き易い。Activated sludge treatment of such wastewater1 has many problems.For example, activated sludge, which is an aggregate of microorganisms, is an indicator of sedimentation.
lumen index) is high, it is difficult to obtain sludge with good compaction in the sludge settling tank, and high-load processing,
When processing with large load fluctuations is performed, or when filamentous bacteria occur in activated sludge, the activated sludge becomes bulky, resulting in poor settling. Therefore, in conventional wastewater 11q sludge treatment, it is difficult to maintain a high concentration of activated sludge in the aeration tank, and therefore, it is difficult to maintain the activated sludge in the aeration tank at a high concentration. There is a limit to the improvement, and when bulking occurs, activated sludge flows out of the sludge settling tank, which tends to cause deterioration of treated water quality.
また、従来の廃水の活性汚泥処理は、分解除去されたＢ
ＯＤ、によって表示される汚濁物（以下ＢＯＤと略記）
の４０〜７０％が活性汚泥に変換され、活性汚泥が着し
く増殖し、曝気槽の活性汚泥が高濃度になる。曝気槽の
活性汚泥が高濃度になると汚泥沈降槽から処理水に流出
し、処理水の水質悪化を招く、このため曝気槽の汚泥濃
度を一定に維持する必要があり、汚泥沈降槽より活性汚
泥を余剰汚泥として抜取る。この余剰汚泥はメタン発酵
、脱水焼却等により処理されているが、多くの問題点が
存在している。In addition, the conventional activated sludge treatment of wastewater
Contaminants indicated by OD (hereinafter abbreviated as BOD)
40 to 70% of the activated sludge is converted into activated sludge, and the activated sludge proliferates rapidly, resulting in a high concentration of activated sludge in the aeration tank. When the activated sludge in the aeration tank becomes highly concentrated, it flows out from the sludge settling tank into the treated water, causing deterioration of the water quality of the treated water. Therefore, it is necessary to maintain the sludge concentration in the aeration tank at a constant level, and the activated sludge flows out from the sludge settling tank into the treated water. is extracted as surplus sludge. This surplus sludge is treated by methane fermentation, dehydration and incineration, etc., but there are many problems.
このため、従来の活性汚泥処理法では、処理設備を建設
する場合、広い土地を必要とし、また処理プロセスの簡
略化、処理設備のコンパクト化が困難なため処理設備の
建設にかなりの費用が必要である。For this reason, the conventional activated sludge treatment method requires a large area of land to construct treatment facilities, and it is difficult to simplify the treatment process and make the treatment facilities more compact, so construction of treatment facilities requires considerable costs. It is.
このような廃水処理の問題点を解決する一つの手段とし
て高効率の活性汚泥処理技術の開発が姿望されている。The development of highly efficient activated sludge treatment technology is desired as a means to solve these problems in wastewater treatment.
従来廃水の活性汚泥処理を高効率に行なう方法として曝
気槽の活性汚泥を１Ｉｆｉ濃度に維持する方法があり、
この方法には流り」増力式と固定床方式とがある。Conventionally, as a highly efficient method for treating wastewater with activated sludge, there is a method of maintaining activated sludge in an aeration tank at a concentration of 1 Ifi.
This method includes a flow boosting method and a fixed bed method.
流ＩｊＪｓ層方式は、活性汚泥を珪藻土等の土砂の微粒
子あるいは活性炭の粒子、又は、多孔質の育成高分子物
質の粒子を曝′Ａ槽に添加し、これらの粒子を曝気によ
り曝気槽内を流動させて、これに活性汚泥を付着させ、
活性汚泥の沈降性を改善して活性汚泥を高濃度に維持す
る方法である。In the flow IjJs layer method, activated sludge is added to the aeration tank with fine particles of earth and sand such as diatomaceous earth, particles of activated carbon, or particles of a porous growth polymer material, and these particles are aerated into the aeration tank. Let it flow and attach activated sludge to it,
This is a method of maintaining activated sludge at a high concentration by improving the sedimentation properties of activated sludge.
固定床方式は、有機高分子化合物よりなるノ１ニカムチ
ューブあるいは多層板を曝気槽に浸漬し、これに活性汚
泥を付着させて固定化する方法である。The fixed bed method is a method in which a nicum tube or multilayer plate made of an organic polymer compound is immersed in an aeration tank, and activated sludge is adhered to and immobilized thereon.
しかし、これらの従来の方法には多くの問題点があった
。However, these conventional methods have many problems.
まず、珪藻土等の土砂の微粒子を用いた流動層型方式は
、活性汚泥とこれらのＳ磯系微粒子との親和性が十分で
ないため、活性汚泥が安定して付着するのに長時間を要
する。First, in the fluidized bed method using fine particles of earth and sand such as diatomaceous earth, the affinity between activated sludge and these S-type fine particles is not sufficient, so it takes a long time for the activated sludge to stably adhere.
更にこれらの固定化担体は、↓ｔ！ｕが大きいため曝気
槽内で均一に浮遊させるためには大量の空気を吹き込む
か、微粒子の固定化担体を用いるか、または特殊な形状
の曝気槽が必要である。Furthermore, these immobilization carriers are ↓t! Since u is large, it is necessary to blow in a large amount of air, use a fine particle immobilization carrier, or use a specially shaped aeration tank in order to uniformly suspend the particles in the aeration tank.
また、この担体に付着した活性汚泥を余剰汚泥として処
理する方法が十分に確立していない。Furthermore, a method for treating activated sludge adhering to this carrier as surplus sludge has not been sufficiently established.
また、粉末活性炭、有機系高分子化合物の粒子を用いた
流動床型方式の場合、これらの粒子と活性汚泥との親和
性は非常１こ良く、活性汚泥が安定して付着する。しか
し、この方法で処理した後の余剰汚泥をメタン醗酵法１
こより処理する場合、メタン醗酵後、これらの粒子を再
生利用する技術が十分に確立していない、また、余剰汚
泥を焼Ｊ、ＩＩ処理する場合、これらの担体粒子は、無
８！系担体粒子に比べてコスト的に高く、再生利用が不
可能であると廃水処理のコストを高める原因となる。In addition, in the case of a fluidized bed type system using particles of powdered activated carbon or an organic polymer compound, the affinity between these particles and activated sludge is very good, and the activated sludge adheres stably. However, the surplus sludge treated with this method is processed using methane fermentation method 1.
In the case of this treatment, the technology to recycle these particles after methane fermentation has not been sufficiently established, and in the case of incineration J, II treatment of excess sludge, these carrier particles are completely destroyed. It is more expensive than system carrier particles, and if it cannot be recycled, it will increase the cost of wastewater treatment.
一方、有機高分子化合物のハニカムチューブ、積層板等
を活性汚泥の固定床担体に用いた固定床方式の場合、活
性汚泥とこれらの担体との親和性が良好なため、汚泥が
容易に付着するが増殖した活性汚泥によって担体の閉塞
が起こりやすく、このため、これらの担体を曝′ｊｃ槽
より取り出し、水洗等による洗浄を度々行なって再生す
る必要がある。しかし、これらの固定床型担体に付着し
た活性汚泥は、固定床の構造が複雑であり、また、担体
と活性汚泥との親和力が高いため簡単な水洗等では再生
が困難であり、再生に煩雑な処理を必要とする。On the other hand, in the case of a fixed bed system that uses organic polymer compound honeycomb tubes, laminate plates, etc. as fixed bed carriers for activated sludge, the sludge easily adheres to the activated sludge because the affinity between the activated sludge and these carriers is good. The activated sludge that has proliferated tends to cause clogging of the carriers, and it is therefore necessary to remove these carriers from the ablation tank and wash them with water or the like frequently to regenerate them. However, the activated sludge adhering to these fixed bed carriers is difficult to regenerate by simple washing with water because the fixed bed structure is complex and the affinity between the carrier and activated sludge is high. requires additional processing.
また、サドル型又はリング型のセラミックスを廃水の生
物化学的処理に用いた例として特公昭５１−１４８２４
号公報記載の方法がある。これは廃水の活性汚泥処理の
曝気槽の上部にサドル型および／またはリング型のセラ
ミックスを充填した下向流方式の接触酸化塔を気密に積
載、接続し、この酸化塔の上部より初沈家電を通過した
廃水を散水する。この方式の廃水の汚濁物の分解作用は
、セラミックスに付着している微生物が廃水の汚濁物を
曝４Ａ槽からの上向流の空気を利用して酸化分解する。In addition, as an example of using saddle-shaped or ring-shaped ceramics for biochemical treatment of wastewater, Japanese Patent Publication No. 51-14824
There is a method described in the publication. In this system, a downward flow type contact oxidation tower filled with saddle-shaped and/or ring-shaped ceramics is airtightly mounted and connected to the top of the aeration tank for activated sludge treatment of wastewater. Sprinkle wastewater that has passed through. In this method, the wastewater pollutants are decomposed by microorganisms attached to the ceramics, which oxidize and decompose the wastewater pollutants using the upward flow of air from the exposure tank 4A.
この方法にも多くの問題点が存在している。＊ず、この
方法は廃水を接触酸化塔に下向流で流しており、またこ
の接触酸化塔の下部が曝気槽の水面によってシールされ
ておらず開放型である。このため、接触酸化塔に散水さ
れた廃水は、曝気槽に落下゛するためセラミックスに付
着している微生物と廃水とが十分に接触することができ
ない、このため、この接触酸化塔のみでは十分な処理が
できないため、接触酸化塔の他に未分解の汚濁物を処理
する曝気槽が必要である。This method also has many problems. *First, in this method, wastewater flows downward into a contact oxidation tower, and the lower part of this contact oxidation tower is not sealed by the water surface of the aeration tank, but is an open type. For this reason, the wastewater sprinkled in the contact oxidation tower falls into the aeration tank, and the wastewater cannot sufficiently contact the microorganisms attached to the ceramics. Therefore, the contact oxidation tower alone is insufficient. Since treatment is not possible, an aeration tank is required in addition to the catalytic oxidation tower to treat undecomposed pollutants.
この散水方式の接触酸化塔は、廃水の汚濁物の分解が高
効率に行われない他に廃水に含まれている浮遊性物質等
によってＩｆ（塞しやすい欠点がある。This water-sprinkling type contact oxidation tower has the drawback that it does not decompose wastewater pollutants with high efficiency and is easily clogged by floating substances contained in the wastewater.
以上述べたように従来の活性汚泥を固定化する担体及び
固定床は、活性汚泥との親和性、再利用性、取り扱い性
、コスト等に問題があり、大規模な活性汚泥処理に適用
するのが困難である。As mentioned above, conventional carriers and fixed beds for immobilizing activated sludge have problems with compatibility with activated sludge, reusability, ease of handling, cost, etc., and cannot be applied to large-scale activated sludge treatment. is difficult.
従来の活性汚泥の固定化担体の問題点を解決するため本
発明者の一人は先に多孔性セラミックス等を用いた固定
床型の活性汚泥処理方法を発明したく特願昭Ｇ１−１８
４９３５号）、この先願発明で用いられているアルミナ
−シリカ系のセラミックスは前述の問題点を全て解決し
ているが、このセラミックスを製造する際に高温で焼成
する問題点が残されている。In order to solve the problems of conventional activated sludge immobilization carriers, one of the inventors of the present invention first proposed a fixed bed type activated sludge treatment method using porous ceramics, etc.
No. 4935), the alumina-silica ceramic used in this prior invention solves all of the above-mentioned problems, but there remains the problem of firing at a high temperature when manufacturing this ceramic.
また、従来の活性汚泥を固定化して廃水を好気性活性汚
泥法により処理する方法の共通的問題、ｉ五は、処理性
能に着しく影響する曝気量を管理、制御する方法が十分
に確立していないので、従来の処理方法で良好な処理性
能を得るのが困難であるということである。In addition, a common problem with the conventional method of immobilizing activated sludge and treating wastewater using the aerobic activated sludge method is that the method for managing and controlling the amount of aeration, which has a significant impact on treatment performance, is not well established. This means that it is difficult to obtain good processing performance using conventional processing methods.
（発明が解決しようとする問題点）
従来の廃水の活性汚泥処理は、先に述べたように多くの
問題点があり、これを列記すると次の通りである。(Problems to be Solved by the Invention) The conventional activated sludge treatment of wastewater has many problems as described above, and these are listed as follows.
■ 活性汚泥の同濃度化が困難なため高効率処理、処理
設備のコンパクト化が困難である。■ It is difficult to maintain the same concentration of activated sludge, making it difficult to achieve high efficiency treatment and make treatment equipment more compact.
■ 余剰汚泥の発生が多く、その処理に多くの問題が存
在している。■ Surplus sludge is generated frequently, and there are many problems in its treatment.
■ 流動ノη方式及び固定床方式の活性汚泥法に用いら
れる固定化担体に適切なものが存在せず、また、これら
の処理技術が十分に確立していなす１ 。(2) There is no suitable immobilization carrier for use in the fluidized η method and fixed bed activated sludge method, and these treatment technologies are not well established1.
■ サドル型又はリング型のセラミックスを用いた接触
酸化方式は装置の構造に問題があり、また散水式の下向
流方式なので固定化している活性汚泥と廃水との接触が
十分でないので廃水の汚濁物の分解除去が十分でない。■ The catalytic oxidation method using saddle-shaped or ring-shaped ceramics has problems with the structure of the equipment, and since it is a sprinkler type downward flow method, there is insufficient contact between the fixed activated sludge and the wastewater, resulting in wastewater pollution. Decomposition and removal of objects is not sufficient.
■ 固定化担体を用いた活性汚泥は、処理性能に着しく
影１５する曝気量の管理、制御方式が確立していない。■ For activated sludge using immobilized carriers, there is no established method for managing and controlling the amount of aeration, which has a negative impact on treatment performance15.
本発明は、前記■〜■の廃水の活性汚泥処理の問題点を
解決することを目的としている。The present invention aims to solve the above-mentioned problems of activated sludge treatment of wastewater.
（問題点を解決するための手段）
本発明は、廃水を生物化学的浄化処理するために酸素を
溶存させすこ廃水を廃水の汚濁物を分解゛）−る微生物
を付着させたセラミックス担体に通水して処理する方法
において、セラミックス担体として高炉水砕を主原料と
したサドル型および／またはリング型のセラミックスを
用いることを特徴とする廃水の活性汚泥処理方法である
。サドル型および／またはリング型のセラミックス担体
を充」眞したカセットを用いること、セラミックス担体
を通過後の廃水の酸化還元電位が所定の範囲におさまる
ようにセラミックス担体に通水する廃水に曝気する空気
量を制御すること、廃水がコークス炉から発生するガス
廃液であることは好ましい。(Means for Solving the Problems) The present invention aims to biochemically purify wastewater by dissolving oxygen and passing the wastewater through a ceramic carrier to which microorganisms that decompose pollutants in the wastewater are attached. The activated sludge treatment method for wastewater is characterized by using saddle-shaped and/or ring-shaped ceramics mainly made from granulated blast furnace sludge as a ceramic carrier. Use a cassette filled with a saddle-shaped and/or ring-shaped ceramic carrier, and aerate the wastewater flowing through the ceramic carrier so that the redox potential of the wastewater after passing through the ceramic carrier falls within a predetermined range. It is preferred that the amount be controlled and that the waste water is gas waste generated from a coke oven.
（作用）
本発明者等は下水及び廃水の活性汚泥処理を研究する過
程で、高炉水砕を原料として用いたセラミックスが汚泥
の固定化担体として優れていること、曝気槽より採取し
た活性汚泥の混合液に三次元構造を有する孔を持った多
孔性セラミックスを浸漬すると活性汚泥がセラミックス
内部に入り込みやすいこと、また活性汚泥を固定化した
セラミックスは廃水の活性汚泥処理の固定床としてすぐ
れていることを知見した。(Function) In the process of researching activated sludge treatment of sewage and wastewater, the present inventors discovered that ceramics using granulated blast furnace granules as a raw material are excellent as sludge immobilization carriers, and that activated sludge collected from an aeration tank was When porous ceramics with pores with a three-dimensional structure are immersed in a mixed solution, activated sludge easily penetrates into the ceramics, and ceramics with immobilized activated sludge are excellent as fixed beds for activated sludge treatment of wastewater. I found out.
この研究過程において多孔性セラミックスよりも簡便に
製作でき、虫な活性汚泥を固定化する機能が同等または
優れ、しかも経済的に有利なセラミックスについて検討
した結果、サドル型又はリング型のセラミックスが適切
であり、これらのセラミックスを板状型のカセットに充
填して、これを活性汚泥の混合液に浸漬すると活性汚泥
がサドル型又はリング型のセラミックスの間隙に入りこ
み固定化されることが明らかになった。なお、サドル型
又はリング型のセラミックスを用いると、セラミックス
の単位！！７積当りの表面積及び空隙率が大きく、また
充填物表面に付着成育する活性汚泥が多くなり、固定床
の閉塞が少なく、また処理効率が向上する。During this research process, we examined ceramics that were easier to produce than porous ceramics, had the same or better ability to immobilize activated sludge, and were economically advantageous, and found that saddle-shaped or ring-shaped ceramics were appropriate. It has been revealed that when these ceramics are filled into a plate-shaped cassette and immersed in an activated sludge mixture, the activated sludge gets into the gaps between the saddle-shaped or ring-shaped ceramics and becomes immobilized. . In addition, if you use saddle-shaped or ring-shaped ceramics, it is a unit of ceramics! ! The surface area and porosity per volume are large, and more activated sludge adheres and grows on the surface of the packing material, resulting in less clogging of the fixed bed and improved treatment efficiency.
更に、従来のサドル型又はリング型のセラミックスより
も経済的に有利に製作でき、しかも活性汚泥の固定化機
能が優れたセラミックスを得るため研究した結果、製鉄
所の高炉から発生するスラグを高圧水により急冷した高
炉水砕を用いると良いことが判明した。即ち、尚炉水砕
は、その組成例をｆｉｌに示しているようにＣａＯを約
４２％含有しており、融点が従来のセラミックスの原料
に用いられているアルミナ、シリカ系よりも萱しく低い
、このため、高炉水砕を原料にしてセラミックスを製作
すると、従来のセラミックスに比べて焼成温度が低く、
また短時間に焼成できる１例えば、アルミナ−シリカ系
の蛙目粘土を焼成してサドル型又はリング型のセラミッ
クスを作る場合、焼成温度は１４００〜１５００℃で３
〜７時間必要であるが、高炉水砕を約８０％配合すると
９００〜９５０℃で１〜１．５ 時間で焼成できる。Furthermore, as a result of research to obtain ceramics that can be manufactured more economically than conventional saddle-shaped or ring-shaped ceramics and that have an excellent activated sludge immobilization function, we have found that slag generated from blast furnaces at steel plants is treated with high-pressure water. It was found that it is better to use granulated blast furnace water that has been rapidly cooled. In other words, as shown in the composition example shown in fil, Sho Furnace Granules contains about 42% CaO, and its melting point is much lower than that of alumina and silica, which are used as raw materials for conventional ceramics. Therefore, when producing ceramics using blast furnace granulated raw material, the firing temperature is lower than that of conventional ceramics.
In addition, it can be fired in a short time.For example, when firing alumina-silica clay to make saddle-shaped or ring-shaped ceramics, the firing temperature is 1,400 to 1,500°C.
It takes about 7 hours, but if about 80% of the blast furnace granules are mixed, it can be fired at 900 to 950°C in 1 to 1.5 hours.
このように高炉水砕を原料にｍいると従来のセラミック
スよりも低温で、しかも短時間で焼成ができるの−Ｃ経
済的にも有利である。Using granulated blast furnace material as a raw material is economically advantageous because it can be fired at a lower temperature and in a shorter time than conventional ceramics.
更に、セラミックスの原料として高炉水砕を用いる別の
利点として、次の二とがある。Furthermore, there are two other advantages of using blast furnace granulation as a raw material for ceramics.
高炉水砕は活性汚泥の栄養となるＦ ｅｏ １Ｍ ｇＯ
１Ｃａ○ を含有しているｔこめ活性汚泥が付着しやす
く、又好気性活性汚泥処理において硝化反応で生成した
硝酸イオン、亜硝酸イオン及び脂肪酸による曝気槽のｐ
Ｈ低下をＣａＯにより活性汚泥が生息するのに適したｐ
Ｈに、即ちｐＨ７，０±０．５に維持する性状を有して
いる。このような性状を有する高炉水砕を原料としたセ
ラミックスも高炉水砕とほぼ同じ機能を有しており、従
ってこのセラミックスを活性汚泥の固定化担体に用いる
と活性汚泥が良く付着し、また固定床のｐＨを活性汚泥
が生息するのに適した範Ｂ（ｐＨ＝ ７．０±０．５）
に維持することができ、安定した処理ができる。Blast furnace granulation produces F eo 1M gO, which becomes nutrients for activated sludge.
Activated sludge containing 1Ca○ easily adheres to the aeration tank, and nitrate ions, nitrite ions, and fatty acids generated in the nitrification reaction during aerobic activated sludge treatment reduce the pH of the aeration tank.
The decrease in H is caused by CaO, which increases the pH suitable for activated sludge to live.
H, that is, the pH is maintained at 7.0±0.5. Ceramics made from blast furnace granulated material with such properties have almost the same functions as blast furnace granulated material, and therefore, when this ceramic is used as an immobilization carrier for activated sludge, activated sludge will adhere well to it, and it will also be immobilized. Adjust the pH of the bed to range B (pH = 7.0±0.5), which is suitable for activated sludge to live.
can be maintained and stable processing is possible.
本発明において、この高炉水砕を主原料とするサドル型
又はリング型のセラミックスを活性汚泥の固定化担体と
して用いるが、これらのセラミックスをカセットにしで
用いるのが工業的に最も望ましいことが判明した。なお
、カセットは例えばステンレス等の金網の篭状のカセッ
トに曲述の高炉水砕を原料とするサドル型又はリング型
のセラミックスを充填することによって容易に準備でき
る。In the present invention, saddle-shaped or ring-shaped ceramics made from blast furnace granulation as the main raw material are used as immobilization carriers for activated sludge, and it has been found that it is industrially most desirable to use these ceramics in the form of cassettes. . The cassette can be easily prepared, for example, by filling a basket-shaped cassette made of wire mesh, such as stainless steel, with saddle-shaped or ring-shaped ceramics made from the above-mentioned blast furnace granulation.
そこで、前記のセラミックスで溝成されるカセットを廃
水処理に適用するための処理条件と廃水処Ｊ！！設備に
おける生物化学反応槽の構造等についてｔｔＳ１図によ
って説明する。Therefore, the treatment conditions for applying the above-mentioned ceramic grooved cassette to wastewater treatment and wastewater treatment J! ! The structure of the biochemical reaction tank in the equipment will be explained using ttS1 diagram.
第１図はｆｆ＄１曝気槽２と第２曝気Ｍ３の中間にサド
ル型又はリング型の高炉水砕を主成分とするセラミック
スを充填したセラミックスカセット１を配置した廃水の
生物化学的処理装置で、第１曝気槽２とｆＩＳ２曝気槽
３の下部には曝気用散気管１１がパイプを介して曝気用
ブロアー９に接続されて設けられている。また処理水１
２を排出する側の第２曝気槽３にはＯＲＰセンサー４が
配置され、このＯＲＰセンサー４はＯＲＰ制御！！置装
に接続されるとともに、このＯＲＰ制御装置５には曝気
量調整用電磁弁１０が導線を介して接続され、曝気量調
整用電磁弁１０は曝気用散気管１１と曝気用ブロアー９
の間に配置され、ＯＲＰ制御装置５の指示により作動し
て曝気量を制御で終るようになっている。なお、６は記
録計、７は下水供給用ポンプ、８は下水Ｉｆ４整タンク
である。Figure 1 shows a wastewater biochemical treatment device in which a saddle-shaped or ring-shaped ceramic cassette 1 filled with ceramics mainly composed of blast furnace granules is placed between the ff$1 aeration tank 2 and the second aeration tank 2. At the bottom of the first aeration tank 2 and the fIS2 aeration tank 3, an aeration diffuser pipe 11 is provided connected to an aeration blower 9 via a pipe. In addition, treated water 1
An ORP sensor 4 is placed in the second aeration tank 3 on the side that discharges NO. 2, and this ORP sensor 4 performs ORP control! ! A solenoid valve 10 for adjusting the aeration amount is connected to the ORP control device 5 via a conductive wire, and the solenoid valve 10 for adjusting the aeration amount is connected to an aeration diffuser pipe 11 and an aeration blower 9.
The aeration amount is controlled by operating according to instructions from the ORP control device 5. Note that 6 is a recorder, 7 is a sewage supply pump, and 8 is a sewage If4 regulating tank.
１１図に示す曝気槽に種汚泥として下水の活性汚泥の混
合液（活性汚泥濃度１０００〜５０００ａ＋ｇ／ ｌ
）を入れると活性汚泥がセラミックスの空隙に入り込み
、第１曝気槽２と第２曝気槽３は一定の時間を経過する
とほぼ透明になる。そこで空気、ＮＬ索富化空気、また
は酸素（以後酸素含有曝気用気体と称する）を曝気用散
気管１１より吸込み第１、第２曝気槽２．３の曝気を行
う。A mixed solution of activated sludge from sewage (activated sludge concentration 1000 to 5000a+g/l) was placed in the aeration tank shown in Figure 11 as seed sludge.
), activated sludge enters the voids of the ceramic, and the first aeration tank 2 and second aeration tank 3 become almost transparent after a certain period of time. Therefore, air, NL cable-enriched air, or oxygen (hereinafter referred to as oxygen-containing aeration gas) is sucked through the aeration diffuser pipe 11 to aerate the first and second aeration tanks 2.3.
次に廃水を通水し、廃水が第１曝気槽２．３槽槽（セラ
ミックスカセット１配置部）及び第２曝気梢３を通過す
る見かけの通過時間（処理時間に相当する）が１６時間
になるように調整し、その後、処理時間を逐次短縮して
活性汚泥の馴養を行ない、定常は２〜４時間で処理を行
なう、この馴養は約１０〜３０日間程度で良い。Next, the wastewater is passed through, and the apparent passage time (corresponding to treatment time) for the wastewater to pass through the first aeration tank 2, 3 tanks (ceramic cassette 1 arrangement part) and the second aeration tree 3 is 16 hours. After that, the treatment time is gradually shortened to acclimatize the activated sludge, and the constant treatment is carried out for 2 to 4 hours. This acclimatization may take about 10 to 30 days.
また、第１曝気槽２及び第２１１！ｊ気槽３に吹き込む
酸素含有曝気用気体の曝気量は、第１図に示す第２曝気
槽３に配置されたＯＲＰセンサー４によりＰｔ４２曝気
梢３のＯＲＰを計測しなからＯＲＰがその廃水の処理に
適したＯＲＰ値になるようにＯＲｌ）制御装置１５によ
り電磁弁１０を介してコントロールする。Also, the first aeration tank 2 and the 211th! The amount of aeration of the oxygen-containing aeration gas blown into the aeration tank 3 is determined by measuring the ORP of the Pt42 aeration tree 3 using the ORP sensor 4 placed in the second aeration tank 3 shown in FIG. The ORl control device 15 controls via the solenoid valve 10 so that the ORP value is suitable for the processing.
本発明法では廃水に含まれている汚濁物の分解は、１１
図のＰｔ５１曝気槽２において流入した廃水に酸素含有
曝気用気体を吹き込むことにより酸素を溶解させ、次の
Ｂ槽のセラミックスカセット１に通水するとセラミック
スカセット１に付着している活性汚泥が溶存酸素を利用
して廃水の汚濁物を分解する。更に、第２曝気ＷＩ３に
おいて酸素を溶解させることにより３ＷＩにおいて分解
しなかった汚濁物を分解したり、或いは、悪臭の原因物
質の除去を行ない、また、処理水な好気状態にする。In the method of the present invention, the decomposition of pollutants contained in wastewater is
Oxygen is dissolved by blowing oxygen-containing aeration gas into the wastewater that has flowed into the Pt51 aeration tank 2 shown in the figure, and when the water is passed through the ceramic cassette 1 of the next tank B, the activated sludge adhering to the ceramic cassette 1 is dissolved into dissolved oxygen. Decomposes pollutants in wastewater using water. Further, by dissolving oxygen in the second aeration WI3, pollutants that were not decomposed in the third aeration are decomposed, or substances that cause bad odor are removed, and the treated water is brought into an aerobic state.
その結果後述するよるに従来法に比べてすぐれた効果が
得られる。As a result, as will be described later, superior effects can be obtained compared to conventional methods.
次にセラミックスカセットの設置方法について説明する
。Next, a method for installing the ceramic cassette will be explained.
セラミックスの充填材を充填したカセットを第１図のＢ
槽に設置する場合も、Ｂｍに１カセ７）のみを設置する
のではなく、Ｂ槽の廃水の流れ方向に対して５〜２５等
分の厚さを有する複数のカセットを設置するのが好まし
い。The cassette filled with ceramic filler is shown in B in Figure 1.
When installing in a tank, it is preferable not to install only one cassette 7) in Bm, but to install multiple cassettes having a thickness of 5 to 25 equal parts in the direction of flow of wastewater in tank B. .
これらのカセットの設置方法は、廃水がこのカセットを
効率良く通過するように、例えばカセットの両サイド及
び底部、或いはＢ槽の側壁、底部などにシールをして廃
水がセラミックスカセット面だけから通過するようにす
るのが好まし〜１゜次に、第１図のｔｔＳｌ曝気槽２、
Ｂ槽及び１２曝気槽３の容積の比率は、経験的にＢ槽の
１．０に対して第１曝気槽２、第２曝気槽３が各々０．
２５〜１．０の範囲が良く、最適な比率は、ｔｔＳ１曝
気槽２が０．５、Ｂ槽力弓、Ｏ，第２曝気１ｆ！３が０
．５である。The method for installing these cassettes is to seal the sides and bottom of the cassette, or the side walls and bottom of tank B, so that the wastewater passes through the cassette efficiently, so that the wastewater passes only from the ceramic cassette surface. It is preferable to
Empirically, the volume ratio of the B tank and the 12th aeration tank 3 is 1.0 for the B tank and 0.0 for the first aeration tank 2 and the second aeration tank 3, respectively.
A range of 25 to 1.0 is good, and the optimal ratio is 0.5 for ttS1 aeration tank 2, B tank power bow, O, 2nd aeration 1f! 3 is 0
．． It is 5.
なお、廃水を活性汚泥法により処理を行なった後、処理
水より活性汚泥を分離する汚泥沈降槽は、本発明の場合
、活性汚泥がＢ槽のセラミックスの内にほぼ完全に保持
され、第２１１気槽３にほとんど流出しないため、一般
の廃水の活性汚泥処理に存在している活性沈降槽は省略
できるか、又は簡略化することができる。なお、本発明
の他の実施態様として第２図に示すように、セラミック
スカセット１を一定の間隔をあけて設けてこのセラミッ
クスカセット１間の間隙の下方から１１ｇ！索含有曝気
用気体を吹込み廃水中に酸素を溶存させても良い。In addition, in the case of the present invention, the activated sludge is almost completely retained in the ceramics of the B tank, and the sludge settling tank that separates activated sludge from the treated water after treating wastewater by the activated sludge method is Since almost no flow flows into the air tank 3, the activated sedimentation tank that is present in the activated sludge treatment of general wastewater can be omitted or simplified. In addition, as shown in FIG. 2, as another embodiment of the present invention, ceramic cassettes 1 are provided at regular intervals, and the distance between the ceramic cassettes 1 is 11 g from below the gap between the ceramic cassettes 1. Oxygen may be dissolved in the wastewater by blowing in an aeration gas containing cables.
次に本発明においてサドル型又はリング型セラミックス
を充填したカセットを用いる場合の利点について説明す
る。活性汚泥が固定化されている固定床への廃水の通水
方法に上って固定床の閉塞性、処理水質が異なる１例え
ば、Ａｆｊ記特公昭５１−１４８２４号公報及び一般の
故水櫨床のように固定床の上１’ｌｌｓより廃水を散水
したり通水すると廃水に含まれている浮遊性物質によっ
て固定床が閉塞しやすい、また、この方法は、廃水と固
定床に固定化されている活性汚泥との接触時間を任意に
コントロールするのが困難であり、さらに廃水と活性汚
泥との接触が不十分なため廃水の汚濁物の分解率が低く
、良好な処理性能が得られない。Next, the advantages of using a cassette filled with saddle-shaped or ring-shaped ceramics in the present invention will be explained. Depending on the method of passing wastewater to the fixed bed in which activated sludge is immobilized, the clogging properties of the fixed bed and the quality of the treated water differ.1 For example, Afj, Special Publication No. 14824/1983 and the general waste water oak bed. If wastewater is sprinkled or passed from 1'lls above the fixed bed, the fixed bed is likely to be clogged by floating substances contained in the wastewater. It is difficult to arbitrarily control the contact time with activated sludge, and furthermore, because the contact between wastewater and activated sludge is insufficient, the decomposition rate of pollutants in wastewater is low, and good treatment performance cannot be obtained. .
一方、本発明においてサドル型又はリング型セラミック
スを充填したカセットを用いる場合には、これらの問題
点を全て解決する。即ち、カセットを浸漬して先に説明
したように横から通水すると廃水とセラミックスに固定
化されている活性汚泥との接触時間を任意にコントロー
ルすることができ、廃水が活性汚泥と十分に接触するた
め廃水の汚濁物の分解が十分に行なわれ良好な処理性能
が得られる。更に、このような方法で廃水をカセットに
通水すると廃水の浮遊性物質による！／（泰の発生が少
ない。On the other hand, in the case of using a cassette filled with saddle-shaped or ring-shaped ceramics in the present invention, all of these problems are solved. In other words, if the cassette is immersed and water is passed from the side as explained above, the contact time between the wastewater and the activated sludge immobilized on the ceramics can be controlled arbitrarily, and the wastewater is in sufficient contact with the activated sludge. Therefore, wastewater pollutants are sufficiently decomposed and good treatment performance can be obtained. Furthermore, if wastewater is passed through the cassette in this way, floating substances in the wastewater will be generated! /(Tai occurs less often.
次に、カセットの閉塞及び閉塞した場合の再生方法につ
いて説明する。Next, occlusion of the cassette and a regeneration method in the case of occlusion will be described.
セラミックスのカセットに活性汚泥を付着させて廃水を
生物化学的に処理する場合、長期間処理を行なっている
と廃水に含まれている浮遊性汚濁物貿或いは活性汚泥の
増殖によってセラミックスのカセットが閉塞することが
ある。When biochemically treating wastewater by attaching activated sludge to a ceramic cassette, the ceramic cassette may become clogged due to floating pollutants contained in the wastewater or proliferation of activated sludge if the treatment is continued for a long time. There are things to do.
この閉塞は、第１図に示すＢ梢の１番最初のカセット
（第１曝気槽２に最も近い部分）が起り易く、カセット
のｒ／（賽が起った場合、成いは、閉塞に近い状態にな
ったらこのカセットを取り出し、２番目のカセットを１
番目の位置１こ、３＠目のカセットを２番目の位置にと
水平方向に順次移動させ、一番数後のカセット （第２
１Ｄｊ気槽３に近い部分）に新しいカセット又は閉塞し
たカセットを再生したものを設置する。このようにセラ
ミックスカセットを循環交換する方式は、廃水処理を竹
ないながらカセットの交換が可能で、しかも、処理効率
及び処理水質の低下を招くこともないので最適な方法で
ある。This blockage occurs in the first cassette of the B tree shown in Figure 1.
(the part closest to the first aeration tank 2) is likely to occur, and if the cassette r/
Move the 1st and 3rd cassettes to the 2nd position in the horizontal direction, and then
Install a new cassette or a regenerated closed cassette in the 1Dj (the part near the air tank 3). This method of circulating and exchanging ceramic cassettes is an optimal method because it allows the cassettes to be exchanged without sacrificing wastewater treatment, and it does not cause a decrease in treatment efficiency or quality of treated water.
次に、閉塞した、まｒこは閉塞に近い状態のセラミック
スカセットの再生方法について説明する。Next, a method for regenerating a ceramic cassette that is almost closed will be described.
Ｂ槽より引上げたカセットは、静止しておくと内部に含
まれている水がｉＩｌ出し、がなりの水分を除去するこ
とができる。また、内部に付着している活性汚泥は、高
圧水による水洗により容易に除去することができ、この
水洗したカセットは、直ちに１１工使用することができ
る。If the cassette pulled up from tank B is kept stationary, the water contained inside will flow out and any remaining moisture can be removed. In addition, activated sludge adhering to the inside can be easily removed by washing with high-pressure water, and the washed cassette can be used immediately for 11 times.
また、水洗だけで付着汚泥の除去ができない場合には静
１ｖｌにより水切りしたカセットあるいは水洗後水切り
したカセットを５００〜８００℃＋７） ｌｔ却炉に入
れると付着している汚泥は、燃焼除去することができる
。In addition, if the attached sludge cannot be removed by washing with water alone, the cassette that has been drained with 1 vol of water or the cassette that has been drained after washing should be placed in the incinerator at 500-800°C + 7) to remove the attached sludge by burning. Can be done.
このような方法により再生したカセットは、活性汚泥の
付着機能が損われないので、再使用が可能である。A cassette regenerated by such a method can be reused because the activated sludge adhesion function is not impaired.
また、活性汚泥が付着したカセットをそのままメタン醗
酵槽に入れるとメタン醗酵が起りメタンを回収すること
ができ、更に、メタン醗酵後のカセッＦは、高圧水によ
り水洗、或いは、燃焼することにより再使用が可能にな
る。In addition, if the cassette with activated sludge attached to it is directly placed in a methane fermentation tank, methane fermentation will occur and methane can be recovered.Furthermore, cassette F after methane fermentation can be recycled by washing it with high-pressure water or burning it. Usage becomes possible.
この他に本発明の特徴として次のことを挙げることがで
きる。Other features of the present invention include the following.
本発明の活性汚泥処理方法により廃水の処理を行っｐ、
場合、セラミックスに固定されている活性汚泥の剥離、
流出がほとんど起らない、このため、本発明では一般の
活性汚泥処理の曝気槽の後に設けられている汚泥沈降槽
に相当する固液分離装置の簡略化、省略化が可能である
。Treating wastewater by the activated sludge treatment method of the present invention,
In case, peeling of activated sludge fixed on ceramics,
Almost no outflow occurs. Therefore, in the present invention, it is possible to simplify and omit the solid-liquid separation device corresponding to the sludge settling tank provided after the aeration tank in general activated sludge treatment.
また、本発明の活性汚泥処理方法により処理した処理水
を、第１図及び第２図の第２曝気槽３の後に膜分離装置
、例えばｍ濾過装置、逆浸透圧装置等を設けて処理する
と処理水ｌこ含まれている微量の浮遊性物質等が除去さ
れて、更に処理水の水質が向上する６例えば、下水を本
発明の活性汚泥処理方法と膜分離法により処理すると、
この処理水は工業用水、ビル等の水洗便所の洗浄水に使
用することがでべろ。Further, if the treated water treated by the activated sludge treatment method of the present invention is treated by installing a membrane separation device, such as an m-filtration device, a reverse osmosis device, etc. after the second aeration tank 3 in FIGS. 1 and 2, Trace amounts of floating substances contained in the treated water are removed, further improving the water quality of the treated water.6 For example, when sewage is treated by the activated sludge treatment method and membrane separation method of the present invention,
This treated water can be used for industrial purposes and for flushing toilets in buildings, etc.
なお、本発明の活性汚泥処理方法は、除去されたＢＯＤ
の活性汚泥への変換率が３〜５％であり、一般の活性汚
泥処理に比べて余剰汚泥の発生が約１／１０と非常に少
な（、このため余剰汚泥処理設備を着しく小型にするこ
とができる。In addition, the activated sludge treatment method of the present invention
The conversion rate to activated sludge is 3 to 5%, and the generation of surplus sludge is extremely small, about 1/10 compared to general activated sludge treatment. be able to.
本発明が適用できる廃水の種類は、製鉄所のコークス炉
から発生する〃ス廃液（安水）、〃ス廃液とほぼ同じ性
状を有゛ｒる石炭の液化、〃ス化等−のプラントから発
生する廃水、石油プラント廃水及び魚肉類の加工工場、
乳製品の加工工場等から発生する食品工業廃水及び下水
、ゴミ焼却場から発生する廃水、ゴミ埋立地の浸出水等
である。The types of wastewater to which the present invention can be applied include ``sulfur waste liquid (ammonium water)'' generated from coke ovens in steel plants, and coal liquefaction and sulfurization plants that have almost the same properties as ``sulfur waste liquid.'' Wastewater generated, oil plant wastewater and fish processing plants,
These include food industry wastewater and sewage generated from dairy processing factories, etc., wastewater generated from garbage incineration plants, and leachate from garbage landfills.
なお、本発明においてサドル型セラミックスとリング型
セラミックスを用いるに際しては、廃水の種類によって
使い分けることができる。即ち、サドル型セラミックス
は主に難分解性汚濁物を含有した廃水或いは廃水の汚濁
成分の活性汚泥への変換率が低い廃水、或いは廃水の汚
濁成分の含有量が低い廃水等に適し、例えばコークス炉
から発生するがス廃液或いは大都市の下水等に適用する
のが望ましい、一方、リング型セラミックスは、汚濁成
分の濃度が高い廃水、或いは比較的分解しやすい汚濁成
分、或いは活性汚泥への転換率が高い汚濁成分を含有し
た廃水に適し、例えば団地下水或いは食品工業のプラン
トから発生する廃液に適用することができる。In addition, when using saddle-shaped ceramics and ring-shaped ceramics in the present invention, they can be used depending on the type of wastewater. In other words, saddle-type ceramics are mainly suitable for wastewater containing persistent pollutants, wastewater with a low conversion rate of wastewater pollutants into activated sludge, or wastewater with a low content of wastewater pollutants, such as coke. It is desirable to apply it to wastewater generated from furnaces, sewage in large cities, etc. On the other hand, ring-shaped ceramics are suitable for wastewater with a high concentration of pollutant components, pollutant components that are relatively easy to decompose, or conversion to activated sludge. It is suitable for wastewater containing a high percentage of pollutant components, and can be applied, for example, to wastewater generated from industrial underground water or food industry plants.
さらに用途によってはサドル型とリング型のセラミック
スを併用することもできる。Furthermore, depending on the application, saddle-shaped and ring-shaped ceramics can be used together.
次に、本発明の作用についてまとめる。Next, the effects of the present invention will be summarized.
■ 本発明の方法は、サドル型又はリング型セラミック
スを充填したカセットを用いる場合には、活性汚泥保持
量が大きいので汚濁高負荷処理、或いは短時間処理が可
能であり、このため従来の活性汚泥処理に比べ処理効率
が３〜５倍以上優れている。■ When the method of the present invention uses a cassette filled with saddle-type or ring-type ceramics, the amount of activated sludge retained is large, so high pollution load treatment or short-time treatment is possible. The treatment efficiency is 3 to 5 times higher than that of conventional treatment.
■ 本発明の方法は、サドル型又はリング型セラミック
スを充填したカセットを用いる場合には、内部がかなり
嫌気性のため分解した汚濁成分の活性汚泥への転換率が
低いので余剰汚泥の発生量が従来の活性汚泥に比べて約
１／１０である。■ In the method of the present invention, when using a cassette filled with saddle-shaped or ring-shaped ceramics, the interior is quite anaerobic, so the conversion rate of decomposed pollutant components to activated sludge is low, so the amount of surplus sludge generated is low. This is about 1/10 compared to conventional activated sludge.
■ 高炉水砕を主原料にしたサドル型又はリング型のセ
ラミックスを活性汚泥の固定化担体に用いるので高炉水
砕の栄養成分によりこのセラミックスは活性汚泥の付着
性が栄！！成分を含有していない一般のセラミックスよ
り優れている。■ Saddle-shaped or ring-shaped ceramics made from blast furnace granulated water as the main raw material are used as activated sludge immobilization carriers, so the activated sludge's adhesion to this ceramic is excellent due to the nutritional components of the blast furnace granulated water! ! Superior to general ceramics that do not contain ingredients.
■ 本発明でサドル型又はリング型セラミックスを充填
したカセットを用いる場合は、従来の散水式の下向流方
式に比べて廃水とセラミックスに固定化されている活性
汚泥との接触が良好なので高効率処理が可能であり、ま
た汚濁成分の分解が良好なので処理性能が優れている。■ When using a cassette filled with saddle-shaped or ring-shaped ceramics in the present invention, the efficiency is higher because the contact between the wastewater and the activated sludge fixed in the ceramics is better than in the conventional downward flow method of sprinkler type. It has excellent treatment performance because it can be treated and decomposes contaminant components well.
■ また、曝気量を処理水の水質と密接な関係がある第
２１１１気槽３の酸化還元電位を指標にして管理、制御
を行う場合は処理水質が優れている。(2) Furthermore, when the aeration amount is managed and controlled using the oxidation-reduction potential of the 2111th air tank 3, which is closely related to the quality of the treated water, as an index, the quality of the treated water is excellent.
（実施例） 本発明の実施例について説明する。(Example) Examples of the present invention will be described.
実施例１
ｔ５２図の実験装置の生物化学的反応槽（第１曝気４ｆ
ｉ２・・・１０１、セラミックス槽・・・２０１、第２
曝気槽３・・・１０１、）のセラミックス槽に高炉水砕
微粉８０重＠部、蛙目粘土２０重量部、オ〃屑２０重量
部よりなる混合物を９００ ”Ｃで焼成して作ったリン
グ型セラミックス （直径８＋ｊｗ、長さ１２ｍｍ）を
充填し、畜肉加工工場の活性汚泥処理の曝気槽より採取
した活性汚泥混合液（濃度２５００−３５００ｕｇ／
ｌ、ＳＵ、。５０−９０％、５Ｖ１１７０〜３８０ ｍ
ｌ／ｇ）を２７１入れて曝気を行うと約１０〜１５時間
で活性汚泥がセラミックスに固定化され、第１曝気ＷＪ
２及び第２曝気槽３が透明になった。そこで、表２に示
す同工場から発生する廃水をＢＯＤ容積負荷址が１ ｋ
８／情３・日になるように廃水ポンプで供給し、またｆ
ｊＳ２曝気槽３の酸化還元電位が＋１８０〜＋２３０ｍ
Ｖになるよう曝気を行って処理した。Example 1 Biochemical reaction tank (first aeration 4f) of the experimental equipment shown in t52
i2...101, ceramic tank...201, 2nd
A ring shape was made by firing a mixture consisting of 80 parts by weight of granulated blast furnace powder, 20 parts by weight of frog's eye clay, and 20 parts by weight of sawdust in the ceramic tank of the aeration tank 3...101, at 900''C. The activated sludge mixture (concentration 2500-3500ug/
l, SU,. 50-90%, 5V1170-380m
When aeration is performed with 271 l/g), the activated sludge is fixed on the ceramics in about 10 to 15 hours, and the first aeration WJ
2 and the second aeration tank 3 became transparent. Therefore, the wastewater generated from the same factory shown in Table 2 has a BOD volumetric load of 1 k.
8/June 3.
jThe oxidation-reduction potential of S2 aeration tank 3 is +180 to +230m
Aeration was performed so that the temperature was V.
表 ２ 実験に使用した廃水の性状（ｍｇ／Ｉ）固定
化した活性汚泥が表２の廃水に馴養して処理水のＢＯＤ
５が２０＋ａＦＩ／Ｉ以下になるまで同じ条件で処理を
行い、処理水のＢＯＤ、が２０ ｍＨ／ｌ以下になった
ら逐次ＢＯＤ負′ｆｒｊｌｉｔを増加して処理を行った
。その結果を表３に示す。Table 2 Characteristics of wastewater used in the experiment (mg/I) The fixed activated sludge becomes accustomed to the wastewater in Table 2 and the BOD of the treated water
The treatment was carried out under the same conditions until the BOD of the treated water became 20+aFI/I or less, and when the BOD of the treated water became 20 mH/l or less, the BOD minus 'frjlit was successively increased and the treatment was carried out. The results are shown in Table 3.
畜産加工工場から発生する廃水をリング型セラミックス
を充填したカセットを用いて本発明方法により処理した
結果、ＢＯＤ容積負荷ｊｉ ４ ｋｇ／ ｎ’・日の高
負荷処理をイ〒っでもＢＯＤ、及びＣＯＤ ｆ４ｎが２
０ｍｇ７１以下の処理水が得られた。As a result of treating wastewater generated from a livestock processing factory by the method of the present invention using a cassette filled with ring-shaped ceramics, high-load treatment with a BOD volumetric load of 4 kg/n'/day was achieved. f4n is 2
Treated water of 0 mg71 or less was obtained.
実施例２
第１図の実験装置の生物化学的反応槽（第１曝気槽２・
・・１０１、セラミックス槽・・・２０ ＋、第２曝
気槽３・・・１０１）のセラミックス槽に高炉水砕機＊
１０１１１ｊｉｆｆｌＳ、ｕｌｌ粘土２０ｆｆｘｆｆｉ
ｉ、オ〃屑２０重量部よりなる混合物を９００℃で焼成
して作ったサドル型セラミックス （３／４インチ）を
充填し、コークス工場から発生するガス廃液を処理して
いる活性汚泥処理装置の曝気槽より採取した活性汚泥混
合８！（濃度５０００〜６５００Ｂ／ Ｉ ）を２７入
れて曝気を行った。このときの曝気は、エアーポンプの
代わりに酸素富化空気！ｉｌ道装置を用いて酸素濃度的
３５％の空気を用いた。約８〜１２時間たつと活性汚泥
がセラミックスに固定化され、第１曝気梢２及び第２曝
気糟３が透明になった。Example 2 The biochemical reaction tank (first aeration tank 2,
...101, Ceramics tank...20 +, 2nd aeration tank 3...101) Blast furnace water crusher*
10111jifflS, ul clay 20ffxffi
i. The activated sludge treatment equipment is filled with saddle-shaped ceramics (3/4 inch) made by firing a mixture of 20 parts by weight of sawdust at 900°C and is used to treat gas waste liquid generated from a coke factory. Activated sludge mixture collected from the aeration tank 8! (concentration 5000 to 6500 B/I) and aeration was performed. The aeration at this time is oxygen-enriched air instead of an air pump! Air with an oxygen concentration of 35% was used using an illicit device. After about 8 to 12 hours, the activated sludge was immobilized on the ceramics, and the first aeration canopy 2 and the second aeration chamber 3 became transparent.
そこで、表４に示すガス廃液を４倍に希釈した廃水をＣ
ＯＤＭｎ容積負荷量が１ 、５ ｋｇ／ｍ’・日になる
ように廃水ポンプで供給し、また第２曝気槽３の酸化還
元電位が＋１５０〜＋２００ｍＶになるように酸素富化
空気により曝気を行って処理した。Therefore, the waste water obtained by diluting the gas waste liquid shown in Table 4 four times was
A wastewater pump was used to supply ODMn so that the volumetric load was 1.5 kg/m'day, and aeration was performed using oxygen-enriched air so that the redox potential of the second aeration tank 3 was +150 to +200 mV. Processed.
表 ４ 実験に使用した廃水の性状（ｍｇ／ｌ）固定
化した活性汚泥が表２の廃水に馴養して処理水のＣ０Ｄ
Ｈｎカ（１００ｍＨ／ｌ以下になるまで同じ条件で処理
を行い、処理水のＣ０ＤＨｎが１００ｍｇ７１以下にな
ったら逐次ＣＯＤ負荷量を増加して処理を行った。その
結果を表５に示す。Table 4 Characteristics of wastewater used in the experiment (mg/l) The fixed activated sludge is acclimatized to the wastewater in Table 2 and the C0D of the treated water is
The treatment was carried out under the same conditions until the COD concentration of the treated water became 100 mH/l or less, and when the COD concentration of the treated water became 100 mg71 or less, the treatment was carried out by increasing the COD loading amount sequentially. The results are shown in Table 5.
表 ５ ＣＯＤ容積負荷量と処理水質との関係ＳＣ
Ｎ：チオシアンイオン
ＳＳ ：浮遊性物質
コークス工場から発生するガス廃液をサドル型セラミッ
クスを充填したカセットを用いた本発明方法により処理
した結果、ＣＯＤ容積容積負荷量４ｋ−／・日の高負荷
処理を行ってもＣＯＤが１００鴫！１／１以下、ＳＳが
５０ｍｇ／Ｉ以下の処理水が得られた。Table 5 Relationship between COD volume load and treated water quality SC
N: Thiocyanide ion SS: Suspended substances As a result of processing gas waste generated from a coke factory by the method of the present invention using a cassette filled with saddle-shaped ceramics, high-load processing with a COD volumetric load of 4 k-/day was achieved. Even if I go, the COD is 100! Treated water with an SS of less than 1/1 and an SS of less than 50 mg/I was obtained.
（発明の効果）
■ 本発明の方法は、廃水の活性汚泥処理に多く用いら
れている均一混合型に比べて、生物化学的反応１（一般
の活性汚泥処理の曝気槽に相当する）内に活性汚泥を均
一に混合する必要がなく、単に、廃水に酸素を溶解させ
るのみで良いので、曝気用空気に必要な動力が少なくて
済む。(Effects of the invention) ■ Compared to the homogeneous mixing type that is often used for activated sludge treatment of wastewater, the method of the present invention allows the biochemical reaction 1 (corresponding to the aeration tank of general activated sludge treatment) to Since there is no need to uniformly mix activated sludge and it is sufficient to simply dissolve oxygen in wastewater, less power is required for aeration air.
■ サドル型及びリング型セラミックスは活性汚泥を保
持する８！叱が優れているため処理水に活性汚泥がほと
んど流出しないので、一般の活性汚泥処理に用いられて
いる汚泥沈降槽の省略化、又は簡略化をすることができ
る。■ Saddle-shaped and ring-shaped ceramics retain activated sludge 8! Because of the excellent drainage, almost no activated sludge flows into the treated water, so the sludge settling tank used in general activated sludge treatment can be omitted or simplified.
■ ＢＯＤ負荷量を一般の活性汚泥処理の３〜４倍以上
かけて処理を行っても処理水質が良好である、従って、
生物化学的反応の容量をかなり小型化することができる
。■ The quality of the treated water is good even if the BOD load is 3 to 4 times higher than that of general activated sludge treatment.
The volume of biochemical reactions can be significantly miniaturized.
■ 活性汚泥沈降槽の省略化又は簡略化、さらには生物
化学的反応槽の小型化が可能なので廃水処理設備全体を
着しくコンパクト化することができる。- The activated sludge settling tank can be omitted or simplified, and the biochemical reaction tank can be downsized, making it possible to significantly downsize the entire wastewater treatment facility.
■ 活性汚泥がサドル型及びリング型セラミックス内に
固定化されているので、一般の均一混合型活性汚泥処理
に発生しやすい活性汚泥のバルキングが発生しないので
処理が安定しており、また良好な処理ができる。■ Since the activated sludge is fixed in the saddle-shaped and ring-shaped ceramics, bulking of activated sludge that tends to occur in general homogeneous mixed activated sludge treatment does not occur, so the treatment is stable and the treatment is good. Can be done.
■ サドル型及びリング型セラミックスに固定化された
活性汚泥は、従来の均一混合型活性汚泥処理に比べてＢ
ＯＤの活性汚泥への転換率が着しく小さいので余剰汚泥
の発生が着しく少ない。■ Activated sludge fixed in saddle-shaped and ring-shaped ceramics has a B
Since the conversion rate of OD to activated sludge is extremely low, the generation of surplus sludge is extremely low.
第１図は本発明を実施するために用いるサドル型又はリ
ング型セラミックスを充填したカセットを集成セットに
して配置した廃水処理の生物化学的処理装置の概略図、
Ｐｔ５２図はセラミックスを充填したカセットを一定間
隔をおいて設けた場合の概略図である。
１・・・セラミックスカセット、２・・・第１曝気槽、
３・・・ＰＡ２曝気槽、４・・・ＯＲＰセンサー、５・
・・ＯＲＰ ＩＩ＋御装置、６・・・記録計、７・・・
下水供給用ポンプ、８・・・下水調整タンク、９・・・
曝気用ブロアー、１０・・・曝気ｉ調整用電磁弁、１１
・・・曝気用散気管、１２・・・処理水。FIG. 1 is a schematic diagram of a biochemical treatment device for wastewater treatment in which cassettes filled with saddle-shaped or ring-shaped ceramics used to carry out the present invention are arranged as an assembled set;
Pt52 diagram is a schematic diagram in which cassettes filled with ceramics are provided at regular intervals. 1... Ceramic cassette, 2... First aeration tank,
3...PA2 aeration tank, 4...ORP sensor, 5...
... ORP II + control device, 6... recorder, 7...
Sewage supply pump, 8... Sewage adjustment tank, 9...
Aeration blower, 10... Aeration i adjustment solenoid valve, 11
... Diffuser pipe for aeration, 12... Treated water.
Claims (4)
させた廃水を廃水の汚濁物を分解する微生物を付着させ
たセラミックス担体に通水して処理する方法において、
セラミックス担体として高炉水砕を主原料としたサドル
型および／またはリング型のセラミックスを用いること
を特徴とする廃水の活性汚泥処理方法。(1) In a method for biochemical purification of wastewater, the wastewater in which oxygen has been dissolved is passed through a ceramic carrier attached with microorganisms that decompose pollutants in the wastewater,
A method for treating wastewater with activated sludge, the method comprising using saddle-shaped and/or ring-shaped ceramics mainly made from granulated blast furnace sludge as a ceramic carrier.
担体を充填したカセットを用いる特許請求の範囲第１項
記載の方法。(2) The method according to claim 1, which uses a cassette filled with saddle-shaped and/or ring-shaped ceramic carriers.
が所定の範囲におさまるようにセラミックス担体に通水
する廃水に曝気する空気量を制御する特許請求の範囲第
１項または第２項記載の方法。(3) The method according to claim 1 or 2, wherein the amount of air aerated to the wastewater passing through the ceramic carrier is controlled so that the oxidation-reduction potential of the wastewater after passing through the ceramic carrier falls within a predetermined range. Method.
許請求の範囲第１項から第３項のいずれかの項記載の方
法。(4) The method according to any one of claims 1 to 3, wherein the waste water is a gas waste liquid generated from a coke oven.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62070974A JPH0669555B2 (en) | 1987-03-25 | 1987-03-25 | Wastewater activated sludge treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62070974A JPH0669555B2 (en) | 1987-03-25 | 1987-03-25 | Wastewater activated sludge treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63236596A true JPS63236596A (en) | 1988-10-03 |
| JPH0669555B2 JPH0669555B2 (en) | 1994-09-07 |
Family
ID=13447000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62070974A Expired - Fee Related JPH0669555B2 (en) | 1987-03-25 | 1987-03-25 | Wastewater activated sludge treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0669555B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02307701A (en) * | 1989-05-23 | 1990-12-20 | Asahi Meiboku Kk | Manufacture of longitudinally joined decorative veneer sheet |
| JPH0312286A (en) * | 1989-06-12 | 1991-01-21 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying apparatus |
| JPH0377698A (en) * | 1989-08-21 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying device |
| JPH0394888A (en) * | 1989-09-05 | 1991-04-19 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying device |
| JPH03118899A (en) * | 1989-09-29 | 1991-05-21 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH03146193A (en) * | 1989-10-31 | 1991-06-21 | Yunisoido Kk | Waste water processing device |
| JPH03154693A (en) * | 1989-11-10 | 1991-07-02 | Matsushita Electric Ind Co Ltd | Water purifying apparatus |
| JPH03196897A (en) * | 1989-12-26 | 1991-08-28 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH03196898A (en) * | 1989-12-26 | 1991-08-28 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH03245815A (en) * | 1990-02-23 | 1991-11-01 | Kubota Corp | Biological deodorizing apparatus using ceramic carrier for immobilizing bacteria and waste water treatment apparatus |
| JPH06496A (en) * | 1992-06-23 | 1994-01-11 | Nippon Steel Corp | Advanced treatment of sewage |
| JPH0615294A (en) * | 1992-07-02 | 1994-01-25 | Nippon Steel Corp | Immobilized carrier suitable for sulfur-oxidizing bacteria, immobilization of sulfur-oxidizing bacteria in immobilized carrier, culturing and propagating method for sulfur oxidizing bacteria in fixed bed type bioreactor and biological treatment of waste water containing reducing sulfur compound |
| JP2014028366A (en) * | 2012-06-29 | 2014-02-13 | Nippon Rensui Co Ltd | Treatment apparatus for water discharged from coke oven and treatment method for water discharged from coke oven |
-
1987
- 1987-03-25 JP JP62070974A patent/JPH0669555B2/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02307701A (en) * | 1989-05-23 | 1990-12-20 | Asahi Meiboku Kk | Manufacture of longitudinally joined decorative veneer sheet |
| JPH0312286A (en) * | 1989-06-12 | 1991-01-21 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying apparatus |
| JPH0377698A (en) * | 1989-08-21 | 1991-04-03 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying device |
| JPH0394888A (en) * | 1989-09-05 | 1991-04-19 | Matsushita Electric Ind Co Ltd | Water sterilizing and purifying device |
| JPH03118899A (en) * | 1989-09-29 | 1991-05-21 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH0585236B2 (en) * | 1989-10-31 | 1993-12-06 | Yunisoido Kk | |
| JPH03146193A (en) * | 1989-10-31 | 1991-06-21 | Yunisoido Kk | Waste water processing device |
| JPH03154693A (en) * | 1989-11-10 | 1991-07-02 | Matsushita Electric Ind Co Ltd | Water purifying apparatus |
| JPH03196898A (en) * | 1989-12-26 | 1991-08-28 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH03196897A (en) * | 1989-12-26 | 1991-08-28 | Matsushita Electric Ind Co Ltd | Water purifier |
| JPH03245815A (en) * | 1990-02-23 | 1991-11-01 | Kubota Corp | Biological deodorizing apparatus using ceramic carrier for immobilizing bacteria and waste water treatment apparatus |
| JPH06496A (en) * | 1992-06-23 | 1994-01-11 | Nippon Steel Corp | Advanced treatment of sewage |
| JPH0615294A (en) * | 1992-07-02 | 1994-01-25 | Nippon Steel Corp | Immobilized carrier suitable for sulfur-oxidizing bacteria, immobilization of sulfur-oxidizing bacteria in immobilized carrier, culturing and propagating method for sulfur oxidizing bacteria in fixed bed type bioreactor and biological treatment of waste water containing reducing sulfur compound |
| JP2014028366A (en) * | 2012-06-29 | 2014-02-13 | Nippon Rensui Co Ltd | Treatment apparatus for water discharged from coke oven and treatment method for water discharged from coke oven |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0669555B2 (en) | 1994-09-07 |
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