JPH03178395A - Biological treatment - Google Patents
Biological treatmentInfo
- Publication number
- JPH03178395A JPH03178395A JP1316078A JP31607889A JPH03178395A JP H03178395 A JPH03178395 A JP H03178395A JP 1316078 A JP1316078 A JP 1316078A JP 31607889 A JP31607889 A JP 31607889A JP H03178395 A JPH03178395 A JP H03178395A
- Authority
- JP
- Japan
- Prior art keywords
- flocs
- activated sludge
- aeration
- biological treatment
- solid
- 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
- 238000011282 treatment Methods 0.000 title claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 51
- 238000005273 aeration Methods 0.000 claims abstract description 36
- 238000004062 sedimentation Methods 0.000 claims abstract description 22
- 239000007787 solid Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 20
- 239000002893 slag Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000005484 gravity Effects 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 10
- 238000000746 purification Methods 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 21
- 239000010865 sewage Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000000969 carrier Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000001737 promoting effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 159000000014 iron salts Chemical class 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、下水・産業排水の活性汚泥処理に用いる生物
学的処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a biological treatment method used for activated sludge treatment of sewage and industrial wastewater.
（従来の技術）
一般に、下水および産業排水（以下、下排水と略記）の
活性汚泥処理は次のように行われている。(Prior Art) Generally, activated sludge treatment of sewage and industrial wastewater (hereinafter abbreviated as sewage) is performed as follows.
まず、下排水から土砂、粗大な浮遊物質等の大部分を除
去した後、活性汚泥処理設備の曝気槽において活性汚泥
処理を行うことにより下排水の汚濁物をす解し、次の汚
泥沈降槽において活性汚泥の沈降分離を行い、上澄水を
処理水として放流する。一方、汚泥沈降槽において沈降
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き取り、消化・脱水・焼却処理を経
て処分する。First, after removing most of the sediment, coarse suspended solids, etc. from the sewage drainage, activated sludge treatment is performed in the aeration tank of the activated sludge treatment equipment to dissolve the pollutants in the sewage drainage, and then the next sludge settling tank The activated sludge is separated by sedimentation, and the supernatant water is discharged as treated water. 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 after undergoing digestion, dewatering, and incineration treatments.
このような下排水処理を効率的に行い、省スペース化を
図るための検討が従来から行われている。Studies have been carried out to efficiently perform such sewage treatment and to save space.
たとえば、その一つｌこ高濃度活性汚泥法がある。For example, one of them is the high concentration activated sludge method.
これは活性汚泥濃度を高くすることで浄化に要する時間
を短縮し、曝気槽容量をコンパクト化する。By increasing the activated sludge concentration, this shortens the time required for purification and makes the aeration tank capacity more compact.
ところが、この高濃度活性汚泥法も最終沈澱池における
固液分離機能に制限があるため、思うほご処理場の省ス
ペース化を図ることができない。すなわち、現行の浮遊
性フロックを利用する方法ではフロックが軽いため、抜
本的に容積当りの処理効率を改善することができない。However, this high-concentration activated sludge method also has limitations in the solid-liquid separation function in the final sedimentation tank, so it is not possible to save space at the Homohogo treatment plant. That is, in the current method of using floating flocs, the flocs are light, so it is not possible to fundamentally improve the processing efficiency per volume.
そこで、担体上に生物膜を作り、微生物を増殖させる流
動床生物膜法の研究が行われており （たとえば、水質
汚濁研究Ｖｏｌ、９ Ｎｏ、１１１９８８）、担体と
しては０．３〜０．６１の砂、活性炭あるいは無煙炭等
が使用されている。Therefore, research is being conducted on the fluidized bed biofilm method in which a biofilm is created on a carrier and microorganisms are grown (for example, Water Pollution Research Vol. 9 No. 111988). sand, activated carbon or anthracite, etc. are used.
この流動床生物膜法を用いると曝気槽内の活性汚泥濃度
を高め、かつ容易に生物膜が付着した担体を固液分離す
ることができる。しかし、この流動床生物膜法も担体を
浮上させるための流動エネルギーが大きいこと、担体か
ら剥離した汚泥が系外に流出しやすく、後段にもう一つ
沈澱池を設置する必要があること、また担体に結合力の
強い生物膜を形成させるために必要な時間が長いこと等
の欠点がある。When this fluidized bed biofilm method is used, it is possible to increase the activated sludge concentration in the aeration tank and easily separate the carrier to which the biofilm is attached into solid and liquid. However, this fluidized bed biofilm method also requires a large amount of fluid energy to float the carriers, the sludge separated from the carriers tends to flow out of the system, and it is necessary to install another settling tank in the latter stage. There are disadvantages such as the long time required to form a biofilm with strong binding strength on the carrier.
（発明が解決しようとする課題）
本発明は、担体上に生物膜を作るのではなく、活性汚泥
フロックの比重を大きくして下排水処理を効率的に行い
、省スペース化を図る生物学的処理方法を提供する。(Problems to be Solved by the Invention) The present invention does not create a biofilm on a carrier, but increases the specific gravity of activated sludge flocs to efficiently treat sewage wastewater and to save space. Provide a processing method.
（課題を解決するための手段）
本発明は、活性汚泥フロック内に粒径１００μ以下の微
細な粒状固形物を取り込ませることを特徴とする生物学
的処理方法である。粒状固形物としては尚炉水砕スラグ
の微粉を用いることが好ましい。また、生物学的処理装
置として高速エアレーション沈澱池を用いると効果的で
あり、この場合、高速エアレーション沈澱池内の沈澱部
にブランケットゾーンを形成させることが好ましい。(Means for Solving the Problems) The present invention is a biological treatment method characterized by incorporating fine granular solids with a particle size of 100 μm or less into activated sludge flocs. It is preferable to use fine powder of granulated slag as the granular solid material. Furthermore, it is effective to use a high-speed aeration sedimentation tank as the biological treatment device, and in this case, it is preferable to form a blanket zone in the sedimentation section within the high-speed aeration sedimentation tank.
（作用）
本発明は、活性汚泥フロック内に粒径１００μ以下の微
細な粒状固形物を取り込ませることによりトータルな省
スペース化を可能とする。従来からバルキングの防止対
策として一時的に粘土、活性炭、焼却灰等の重量化剤、
あるいは硫酸バンド、合成高分子凝集剤、鉄塩等の凝集
剤が添加されていた。しかし、本発明はこのようなバル
キングの予防・治療的な手段ではなく、永続的に粒状固
形物（担体）を使用して浮遊性フロックに多数取り込ま
せ、フロックの比重を大きくすること （アンカー効果
）により固液分離を促進し、曝気部内の活性汚泥濃度を
高める。曝気部の活性汚泥濃度が尚くなれば浄化に要す
る時間が短縮でき、曝気部をコンパクト化することがで
きる。また、従来制限のあった最終沈澱池のコンパクト
化も、フロック比重が大きいため固液分離機能が促進さ
れて可能となる。これによ１）、曝気部、沈澱部双方の
トータルな省スペース化が可能となる。(Function) The present invention enables total space saving by incorporating fine granular solids with a particle size of 100 μm or less into activated sludge flocs. Traditionally, as a measure to prevent bulking, we have temporarily used weighting agents such as clay, activated carbon, and incinerated ash.
Alternatively, flocculants such as sulfuric acid, synthetic polymer flocculants, and iron salts were added. However, the present invention is not a means to prevent or treat such bulking, but rather to permanently incorporate a large number of granular solids (carriers) into floating flocs to increase the specific gravity of the flocs (anchor effect). ) to promote solid-liquid separation and increase the activated sludge concentration in the aeration section. If the activated sludge concentration in the aeration section is lowered, the time required for purification can be shortened and the aeration section can be made more compact. Furthermore, the final sedimentation tank can be made more compact, which was a limitation in the past, because the solid-liquid separation function is promoted due to the high specific gravity of the flocs. This allows for 1) total space saving in both the aeration section and settling section.
本発明は微細な担体を浮遊性フロックに混入させるもの
で、担体は浮遊性フロックに容易に取り込まれて短時間
で効果を発揮する。したがって、従来の流動床生物膜法
のように結合力の強い生物膜を熟成する必要がなく、そ
のための期間も不要であり、担体から生物膜が剥離して
系外に流出することもない。また、担体を浮上させるた
めの特別な流動エネルギーも不要である。−旦取り込ま
れた担体は激しい剪断力を加えない限りフロックから剥
離することはなく、したがって通常の曝気混合、機械攪
拌の中では担体・７ａツクの剥離流出の心配はない。In the present invention, fine carriers are mixed into floating flocs, and the carriers are easily incorporated into the floating flocs, and the effect is exerted in a short period of time. Therefore, unlike the conventional fluidized bed biofilm method, there is no need to ripen a biofilm with strong bonding strength, no period of time is required, and the biofilm does not peel off from the carrier and flow out of the system. Also, no special flow energy is required to levitate the carrier. - Once incorporated, the carrier will not separate from the floc unless a severe shearing force is applied, so there is no fear that the carrier/7a will separate and flow out during normal aeration mixing and mechanical stirring.
粒状固形物は活性汚泥フロックに容易に取り込まれるよ
うに粒径１００μ以下の微細なものとする必要があり、
４０μ以下で比較的比重の大きいものが妊ましい。The granular solids must be fine with a particle size of 100μ or less so that they can be easily incorporated into activated sludge flocs.
Those with a relatively high specific gravity of 40μ or less are considered pregnant.
この担体としては珪砂、ゼオライト、焼却灰、コークス
粉等、どんなものでも使用できるが、なるべく汚泥フロ
ック内に取り込まれやすいものが好ましい。Although any carrier can be used, such as silica sand, zeolite, incinerated ash, coke powder, etc., it is preferable to use a carrier that is easily incorporated into the sludge floc.
一般に、活性汚泥生物はフロック形成に関与する多糖類
等の高分子物質を分泌しており、これが７ニオニツクな
高分子物質であるため活性汚泥は負に帯電している。し
たがって、活性汚泥フロック内に取り込まれるためには
正に帯電しているほうが良い。しかし、自然界には、正
に帯電しており、微細粒子で粒径が均一であり、かつ安
価で容易に入手−ｒきるものは極めて少ない。たとえば
、特開平１−２０７１’ ９４号公報には珪砂、クリス
トバライト、ゼオライトという無機系の担体をカチオン
系高分子凝集剤を用いて帯電させる方法が開示されてい
るが、高分子凝集剤による帯電化作業が必要となり、安
価なものとはいえない。Generally, activated sludge organisms secrete polymeric substances such as polysaccharides that are involved in floc formation, and since these are 7-ionic polymeric substances, activated sludge is negatively charged. Therefore, it is better to be positively charged in order to be incorporated into activated sludge flocs. However, in the natural world, there are very few particles that are positively charged, have fine particles with uniform particle size, and are easily available at low cost. For example, JP-A-1-2071'94 discloses a method of charging inorganic carriers such as silica sand, cristobalite, and zeolite using a cationic polymer flocculant. It requires work and is not cheap.
そこで、本発明者らが種々検討した結果、高炉水砕スラ
グの微粉が非常に良いことが明らかになった。高炉水砕
スラグは製鉄所の溶鉱炉から副産物として発生するスラ
グを高圧水により急冷して製造するもので、組成はＣａ
ｏ 、 Ｓ ｉ Ｏ２、Ａｌ□○。As a result of various studies conducted by the present inventors, it became clear that fine powder of granulated blast furnace slag is very good. Granulated blast furnace slag is produced by quenching slag produced as a byproduct from blast furnaces in steel plants using high-pressure water, and its composition is Ca.
o, S i O2, Al□○.
が主成分で、ガラス化率が約９０％以上である。is the main component, and the vitrification rate is about 90% or more.
寸法は前述の通り粒径１００μ以下で、４０μ以下のも
のが妊ましい。As mentioned above, the particle size is 100μ or less, preferably 40μ or less.
高炉水砕スラグは通常は負に帯電しているが、下記のよ
うな機構で活性汚泥フロック内に取り込まれていく、す
なわち、高炉水砕スラグは高圧水による急冷のためガラ
ス化しており、ガラス形成酸化物であるＳ ｉ Ｏ２、
Ａｌ２Ｏ３が強い結合力で共有結合している。このがフ
ス形成酸化物の網目の孔にＣａＯ，ＭｇＯ＊の修飾酸化
物がイオン結合している。このような高炉水砕スラグは
水中で修飾酸化物のＣａ２＋等がゆっくりと溶出し、水
中のＨ＋とイオン交換する。同時に等量のＯＨ−が水中
に分離し、流入する下排水・活性汚泥中に存在する金属
イオン、たとえばＦｅ２“ Ａ＋”“と水酸化物を作る
。この現象は高炉水砕スラグ添加時のｐＨ上昇、酸化還
元電位の低下により確認できる。この水酸化物が凝集剤
として高炉水砕スラグと活性汚泥フロックとの橋渡し的
な役目を果たし、活性汚泥フロック内に高炉水砕スラグ
を取り込んでいく。Although granulated blast furnace slag is normally negatively charged, it is incorporated into activated sludge flocs by the mechanism described below. S i O2, which is a forming oxide,
Al2O3 is covalently bonded with strong bonding force. Modified oxides of CaO and MgO* are ionically bonded to the pores of this network of fluorine-forming oxides. In such granulated blast furnace slag, modified oxides such as Ca2+ are slowly eluted in water and ion-exchanged with H+ in the water. At the same time, an equal amount of OH- separates into the water and forms hydroxides with metal ions such as Fe2 "A+" present in the inflowing sewage water/activated sludge. This can be confirmed by the increase in the oxidation-reduction potential.This hydroxide acts as a coagulant, acting as a bridge between the granulated blast furnace slag and the activated sludge flocs, and incorporates the granulated blast furnace slag into the activated sludge flocs.
このようにして活性汚泥フロック内に容易に取り込まれ
る高炉水砕スラグは比重も２．９と比較的大きく、十分
なアンカー効果を奏する。また、製鉄所等から副産物と
して発生するため、安価で入手しやすい固形物である。The granulated blast furnace slag that is easily incorporated into the activated sludge flocs has a relatively large specific gravity of 2.9, and exhibits a sufficient anchoring effect. In addition, since it is generated as a by-product from steel mills, etc., it is a solid substance that is cheap and easy to obtain.
本発明法は従来から実用化されている種々の生物学的処
理方法、たとえば標準活性汚泥法、回分式、オキシデー
ジ３ンデイツチ法等に十分利用できるが、下記のような
高速エアレーション沈澱池に適用するのが好ましい。The method of the present invention can be fully used in various biological treatment methods that have been put into practical use, such as the standard activated sludge method, batch method, oxidation three-day method, etc. is preferable.
＄１図は高速エアレージラン沈澱池の内部の機構が明ら
かになるように縦方向断面を示す。水槽本体１は内筒４
と外筒８によって曝気部５と循環８１Ｓ ９と沈澱部１
０に分割される。Figure $1 shows a longitudinal section to reveal the internal mechanism of the high-speed airage run sedimentation basin. Aquarium body 1 is inner cylinder 4
The outer cylinder 8 connects the aeration section 5, circulation 81S 9 and settling section 1.
Divided into 0.
流入水Ｗは水槽本体１底付近の流入口２から曝気部５内
に流入し、散気装置３から噴出する空ｎＡＯおよび攪拌
装置１２により曝気部５内を循環させられ、生物学的処
理が施される。流入は、水槽本体１上部より曝気部５内
にパイプを挿入して行ってもよい。内筒４の上部から溢
れ出た一時処理水Ｗ、と活性汚泥６は内筒４と外筒８に
囲まれた循環ｇ９を流下する。この過程で生物学的処理
がさらに進行すると共に汚泥が沈降分＃Ｉされる。The inflow water W flows into the aeration part 5 from the inlet 2 near the bottom of the aquarium body 1, and is circulated in the aeration part 5 by the air nAO spouted from the aeration device 3 and the stirring device 12, and is subjected to biological treatment. administered. The inflow may be performed by inserting a pipe into the aeration part 5 from the upper part of the tank body 1. The temporarily treated water W overflowing from the upper part of the inner cylinder 4 and the activated sludge 6 flow down a circulation g9 surrounded by the inner cylinder 4 and the outer cylinder 8. In this process, the biological treatment further progresses and the sludge is settled as #I.
循環部９を経て外筒８の下部から外側に溢れ出た二次処
理水Ｗ２は、沈澱部１０の中を上向きに流れていく。こ
こでは、一般の上向流式沈澱池と同じ原理で活性汚泥が
沈澱分離される。循環部９と沈澱部１０において処理水
から分離した分離汚泥りは内筒４および外筒８と水槽本
体１との間を流下し、再び曝気部５内に戻る。余剰汚泥
Ｄ１は汚泥排出ロアより排出され、別途処理される。The secondary treated water W2 that has passed through the circulation section 9 and overflowed from the lower part of the outer cylinder 8 to the outside flows upward in the settling section 10. Here, activated sludge is separated by sedimentation using the same principle as in general upflow sedimentation tanks. Separated sludge separated from the treated water in the circulation section 9 and settling section 10 flows down between the inner tube 4 and outer tube 8 and the water tank body 1, and returns to the aeration section 5 again. Excess sludge D1 is discharged from the sludge discharge lower and treated separately.
従来、高速エアレーション沈澱池は高効率な処理を狙い
として設計されたものであるが、沈澱部１０での固液分
離が安定しないため十分な効果を発揮していなかった。Conventionally, high-speed aeration sedimentation tanks have been designed with the aim of highly efficient treatment, but they have not been sufficiently effective because solid-liquid separation in the sedimentation section 10 is unstable.
この高速エアレーション沈澱池に本発明を適用する、す
なわち粒状固形物を添加すると、粒状固形物が活性汚泥
フロック内に容易に取り込まれ、フロック比重を大きく
し、固液分ａ機能を促進させる。その結果、従来の課題
であった固液分離が安定し、高効率な処理が可能となる
。When the present invention is applied to this high-speed aeration sedimentation tank, that is, when granular solids are added, the granular solids are easily incorporated into the activated sludge flocs, increasing the floc specific gravity and promoting the solid-liquid content a function. As a result, solid-liquid separation, which has been a problem in the past, becomes stable and highly efficient processing becomes possible.
また、粒状固形物を曝気部５内に添加すると共に、ＭＳ
２図に示すように沈澱部１０にブランケットゾーン１４
を形成させると、比重の大きいフロック群が安定したブ
ランケットゾーンを形成し、固液分離を一層促進させる
。その結果、曝気部５内の活性汚泥濃度が高まり、浄化
に要する時間が短縮される。また、ブランケットゾーン
が固液分離を促進させ安定化させることに加えて吸着・
濾過機能を持つことで、さらシこ安定した処理ができる
。また、このブランケットゾーンでは大量の汚泥を保有
することになるが、内外部間から流下してくる循環流に
よりブランケット下部の汚泥が弓き込まれる （連行現
象）ためブランケットゾーンではゆっくりとした対流が
起こり、汚泥が数日間滞留して嫌気化することはない。In addition, while adding granular solids into the aeration section 5, the MS
As shown in Figure 2, a blanket zone 14 is provided in the settling section 10.
When formed, a group of flocs with a high specific gravity forms a stable blanket zone, further promoting solid-liquid separation. As a result, the activated sludge concentration in the aeration section 5 increases, and the time required for purification is shortened. In addition to promoting and stabilizing solid-liquid separation, the blanket zone also promotes adsorption and
The filtration function allows for smooth and stable processing. In addition, this blanket zone holds a large amount of sludge, but the sludge at the bottom of the blanket is drawn in by the circulating flow flowing down from the inside and outside (entrainment phenomenon), so slow convection occurs in the blanket zone. sludge remains for several days and does not become anaerobic.
したがって、粒状固形物の添加とブランケットゾーンの
形成により、高速エアレージラン沈澱池は従来以上の機
能を持つ。すなわち、曝Ａ部・沈澱部共高効率な処理が
安定して行えるため装置は非常にコンパクトになり、設
備の省スペース化が図れる。Therefore, with the addition of particulate solids and the formation of a blanket zone, the high velocity aerage run sedimentation basin has more functionality than before. That is, since highly efficient treatment can be stably performed in both the exposure section A and the precipitation section, the apparatus becomes very compact and the space of the equipment can be saved.
（実施例）
水槽本体（容量２．５ｕ’）を内筒および外筒によって
曝気部（１ａ＋３）、沈ｍ部（１，５ｍ’）に仕切り、
曝気部に粒径１〜５０μの高炉水砕スラグの微粉を５
ｋｇ（曝気槽１−当り約５ｋｇに相当）添加し、原水Ｂ
ＯＤ濃度平均２００ｗｇ／ｌ、原水ＣＯＤ濃度平均１５
０ａ＋ｇ／ｌ、原水ＳＳ濃度平均２００ｍｇ／ｌの団地
下水を供給した。(Example) The main body of the aquarium (capacity 2.5 u') is divided into an aeration part (1a + 3) and a submerged part (1.5 m') by an inner cylinder and an outer cylinder,
5 pieces of fine powder of granulated blast furnace slag with a particle size of 1 to 50μ is placed in the aeration part.
kg (equivalent to approximately 5 kg per aeration tank) and raw water B.
OD concentration average 200wg/l, raw water COD concentration average 15
0a+g/l and raw water SS concentration average 200mg/l was supplied.
沈ｌＳ１！ｌには安定したブランケットゾーンを形成し
、曝気部２時間、沈澱部３時間の滞留時間で１年間の連
続処理を行った。その結果、安定した処理ができ、処理
水ＢＯＤ濃度は１０〜２０６／Ｉ、ＣＯＤ濃度は１０−
１５＋Ｂ／ｌ、５Ｓａ１度は１０〜１５１６ｇ／ｌであ
った。この時の曝気部ＭＬＶＳＳ濃度は約６．ＯＯＯ＋
ｏｇ／Ｉであった。ShinlS1! A stable blanket zone was formed in 1, and continuous treatment was carried out for one year with a residence time of 2 hours in the aeration section and 3 hours in the sedimentation section. As a result, stable treatment is possible, with a BOD concentration of 10-206/I and a COD concentration of 10-206/I in the treated water.
15+B/l, 5Sa1 degree was 10 to 1516 g/l. At this time, the MLVSS concentration in the aeration part was approximately 6. OOO+
It was og/I.
（発明の効果）
本発明によれば、下排水の活性汚泥処理において、下排
水を効率良く、安定に、かつ安価に処理することができ
る。すなわち、粒状固形物のアンカー効果により固液分
離が促進され、曝気部内の活性汚泥濃度を高濃度に維持
でき、浄イけに要する時間が短縮でき、１１％部および
最終沈澱部反力のコンパクト化が可能で、トータルな省
スペース化が安価に行える。(Effects of the Invention) According to the present invention, in activated sludge treatment of sewage drainage, sewage drainage can be treated efficiently, stably, and at low cost. In other words, solid-liquid separation is promoted by the anchoring effect of the granular solids, the activated sludge concentration in the aeration section can be maintained at a high concentration, the time required for purification can be shortened, and the reaction force of the final settling section can be reduced by 11%. This allows for total space saving at low cost.
第１図は高速エアレージラン沈澱池を示す図、第２図は
ブランケットゾーンを形成した高速エアレージδン沈澱
池を示す図である。
１・・・水槽本体、２・・・流入口、３・・・数式装置
、４・・・内筒、５・・・曝気部、６・・・活性汚泥、
７・・・汚泥排出口、８・・・外筒、９・・・循環部、
１０・・・沈澱部、１１・・・流出溝、１２・・・攪拌
装置、１３・・・内筒傘部、１４・・・ブランケットゾ
ーン、Ｗ・・・流入水、Ｗｌ・・・−時処理水、Ｗ２・
・・二次処理水、Ｗ、・・・上澄水、ＡＯ，Ａ・・・空
気、Ｄ・・・分離汚泥、Ｄｌ・・・余剰汚泥。FIG. 1 is a diagram showing a high-speed aeration run sedimentation tank, and FIG. 2 is a diagram showing a high-speed aeration δ-run sedimentation tank in which a blanket zone is formed. DESCRIPTION OF SYMBOLS 1... Water tank body, 2... Inlet, 3... Mathematical device, 4... Inner cylinder, 5... Aeration part, 6... Activated sludge,
7...Sludge discharge port, 8...Outer cylinder, 9...Circulation part,
DESCRIPTION OF SYMBOLS 10... Sedimentation part, 11... Outflow groove, 12... Stirring device, 13... Inner cylinder umbrella part, 14... Blanket zone, W... Inflow water, Wl... - time Treated water, W2・
... Secondary treated water, W, ... Supernatant water, AO, A ... Air, D ... Separated sludge, Dl ... Surplus sludge.
Claims (4)
粒状固形物を取り込ませることを特徴とする生物学的処
理方法。(1) A biological treatment method characterized by incorporating fine granular solids with a particle size of 100 μm or less into activated sludge flocs.
ことを特徴とする請求項１記載の生物学的処理方法。(2) The biological treatment method according to claim 1, characterized in that fine powder of granulated blast furnace slag is used as the granular solid material.
池を用いることを特徴とする請求項１または２記載の生
物学的処理方法。(3) The biological treatment method according to claim 1 or 2, characterized in that a high-speed aeration sedimentation tank is used as the biological treatment device.
ットゾーンを形成させることを特徴とする請求項３記載
の生物学的処理方法。(4) The biological treatment method according to claim 3, characterized in that a blanket zone is formed in the sedimentation section in the high-speed aeration sedimentation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316078A JPH0688031B2 (en) | 1989-12-05 | 1989-12-05 | Biological treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316078A JPH0688031B2 (en) | 1989-12-05 | 1989-12-05 | Biological treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03178395A true JPH03178395A (en) | 1991-08-02 |
| JPH0688031B2 JPH0688031B2 (en) | 1994-11-09 |
Family
ID=18073011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1316078A Expired - Lifetime JPH0688031B2 (en) | 1989-12-05 | 1989-12-05 | Biological treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688031B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999000332A1 (en) * | 1997-06-27 | 1999-01-07 | Chikashi Ishimaru | Waste water treatment apparatus and waste water treatment method |
| JP2003010874A (en) * | 2001-06-29 | 2003-01-14 | Ebara Corp | Method and apparatus for high-speed biological treatment of organic sewage |
| WO2006053402A1 (en) * | 2004-11-22 | 2006-05-26 | Nubian Water Systems Pty Limited | Waste water treatment process system |
| CN102126786A (en) * | 2011-01-25 | 2011-07-20 | 山东美泉环保科技有限公司 | Spiral-flow type aerobic particle sludge reactor |
| JP2017202435A (en) * | 2016-05-09 | 2017-11-16 | 富士電機株式会社 | Wastewater treatment method, wastewater treatment device and activator for wastewater treatment |
| JP2020514032A (en) * | 2017-02-07 | 2020-05-21 | ノヴィデアス エス．アール．エル． | Devices for sewage treatment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53111658A (en) * | 1977-03-09 | 1978-09-29 | Toshiba Corp | Treatment of organic waste water |
| JPS55152593A (en) * | 1979-05-14 | 1980-11-27 | Kuraray Co Ltd | Treatment of waste water |
| JPS61129095A (en) * | 1984-11-27 | 1986-06-17 | Akitane Kitajima | Method for recirculating suspended filter bed to reuse the same only by sedimentation separation tank |
| JPS62294496A (en) * | 1986-06-13 | 1987-12-21 | Tosoh Corp | Treatment of drainage by activated sludge process |
-
1989
- 1989-12-05 JP JP1316078A patent/JPH0688031B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53111658A (en) * | 1977-03-09 | 1978-09-29 | Toshiba Corp | Treatment of organic waste water |
| JPS55152593A (en) * | 1979-05-14 | 1980-11-27 | Kuraray Co Ltd | Treatment of waste water |
| JPS61129095A (en) * | 1984-11-27 | 1986-06-17 | Akitane Kitajima | Method for recirculating suspended filter bed to reuse the same only by sedimentation separation tank |
| JPS62294496A (en) * | 1986-06-13 | 1987-12-21 | Tosoh Corp | Treatment of drainage by activated sludge process |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999000332A1 (en) * | 1997-06-27 | 1999-01-07 | Chikashi Ishimaru | Waste water treatment apparatus and waste water treatment method |
| JP2003010874A (en) * | 2001-06-29 | 2003-01-14 | Ebara Corp | Method and apparatus for high-speed biological treatment of organic sewage |
| WO2006053402A1 (en) * | 2004-11-22 | 2006-05-26 | Nubian Water Systems Pty Limited | Waste water treatment process system |
| US7785469B2 (en) | 2004-11-22 | 2010-08-31 | Nubian Water Systems Pty Ltd | Waste water treatment process system |
| CN102126786A (en) * | 2011-01-25 | 2011-07-20 | 山东美泉环保科技有限公司 | Spiral-flow type aerobic particle sludge reactor |
| JP2017202435A (en) * | 2016-05-09 | 2017-11-16 | 富士電機株式会社 | Wastewater treatment method, wastewater treatment device and activator for wastewater treatment |
| WO2017195609A1 (en) * | 2016-05-09 | 2017-11-16 | 富士電機株式会社 | Wastewater treatment method, wastewater treatment device, and active agent for treating wastewater |
| JP2020514032A (en) * | 2017-02-07 | 2020-05-21 | ノヴィデアス エス．アール．エル． | Devices for sewage treatment |
| US11643346B2 (en) | 2017-02-07 | 2023-05-09 | Novideas S.R.L. | Device for sewage treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0688031B2 (en) | 1994-11-09 |
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