JPS62168596A - Biological treatment for waste water containing highly concentrated organic substance - Google Patents
Biological treatment for waste water containing highly concentrated organic substanceInfo
- Publication number
- JPS62168596A JPS62168596A JP61008004A JP800486A JPS62168596A JP S62168596 A JPS62168596 A JP S62168596A JP 61008004 A JP61008004 A JP 61008004A JP 800486 A JP800486 A JP 800486A JP S62168596 A JPS62168596 A JP S62168596A
- Authority
- JP
- Japan
- Prior art keywords
- aeration
- aeration tank
- water temperature
- aeration section
- water
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 25
- 239000000126 substance Substances 0.000 title abstract 3
- 238000005273 aeration Methods 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 25
- 239000010802 sludge Substances 0.000 claims abstract description 22
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 4
- 239000005416 organic matter Substances 0.000 claims description 24
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 abstract description 17
- 238000010790 dilution Methods 0.000 abstract description 13
- 239000012895 dilution Substances 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 10
- 150000001722 carbon compounds Chemical class 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 230000000802 nitrating effect Effects 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000001546 nitrifying effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000010800 human waste Substances 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 244000005700 microbiome Species 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は用水、廃水中のＢＯＤの原因となる炭素化合物
を微生物を利用して処理する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of treating carbon compounds that cause BOD in water and wastewater using microorganisms.
用水、廃水の生物学的処理方法には活性汚泥処理法等種
々の方法が用いられているが、いずれの方法においても
原水中に還元態の窒素化合物（以下ＮＨ，と略記する）
が含有されている場合には硝化菌が発生してＮＯｘ−（
Ｎｏｔ−および／またはＮＯ，”−）を生ずることがあ
る。Various methods are used to biologically treat water and wastewater, such as activated sludge treatment, but all of these methods contain reduced nitrogen compounds (hereinafter abbreviated as NH) in raw water.
If it contains nitrifying bacteria, NOx-(
Not- and/or NO,"-) may occur.
ＮＯｘ−が生成すると、例えば活性汚泥処理法では沈殿
槽で脱窒現象を生じて生成したＮ２ガスが汚泥に付着し
、処理水中の８８ （５ｕｓｐｅｎｄｅｄＳｎｌｉｄｓ
） を増加して水質を悪化する。また硝化によって
ＮＯ２−が生成すると、Ｎｏ、−に起因するＣＯＤが増
加し、まだＮｏ、−自体有害なので水処理技術者にとっ
て憂慮される問題であった。When NOx is generated, for example, in the activated sludge treatment method, the N2 gas generated by the denitrification phenomenon in the settling tank adheres to the sludge, causing
) and worsen water quality. Furthermore, when NO2- is generated by nitrification, COD caused by No,- increases, and since No,- itself is harmful, this has been a problem of concern to water treatment engineers.
特に高濃度の有機物を含む廃水、例えばＢＯＤが１３５
００■／ｌの如く高いし尿などの廃水の処理においては
、ＢＯＤを十分除去するために長時間曝気が必要であり
、また有機物の酸化によって酸化熱が生じ曝気槽水温が
上昇する。このような条件はアンモニアを硝化してＮＯ
ｘ−を生成する硝化菌の増殖に好適であるため、ＮＯｘ
”’発生がよく起こり、特に夏季高温時にこの傾向が
顕著となる。Especially wastewater containing high concentration of organic matter, e.g. BOD of 135
In the treatment of wastewater such as human waste having a high concentration of 0.00 mm/l, aeration is required for a long time to sufficiently remove BOD, and oxidation of organic matter generates oxidation heat, which increases the water temperature of the aeration tank. These conditions nitrify ammonia and produce NO.
Since it is suitable for the growth of nitrifying bacteria that produce x-, NOx
``This phenomenon occurs frequently, and this tendency is especially noticeable during high temperatures in summer.
本発明は、前記従来の生物処理方法のこのような欠点を
解消するだめになされたものであり、混合微生物中の硝
化菌の活性を抑制して処理水中のＮＯｘを低減する方法
を提供するものである。The present invention has been made to overcome these drawbacks of the conventional biological treatment methods, and provides a method for reducing NOx in treated water by suppressing the activity of nitrifying bacteria in mixed microorganisms. It is.
〔発明の構成〕
本発明は、高濃度の有機物を含有する廃水を活性汚泥処
理する方法において、曝気部を少なくとも２分割して第
１曝気部、第２曝気部、−−一の順に形成し、前記廃水
を該曝気部に順次流過せしめ、且つ、返送汚泥を前記第
１曝気部に返送すると共に該第１曝気部の水温を有機物
の酸化反応熱によって４６〜６０℃に上昇せしめてＮＯ
ｘ−の生成を抑制しつつ処理したのち、前記第１曝気部
で残留した有機物を次段以降の曝気部で処理することを
特徴とする高濃度有機物含有廃水の生物学的処理方法で
ある。[Structure of the Invention] The present invention provides a method for treating wastewater containing a high concentration of organic matter with activated sludge, in which an aeration section is divided into at least two parts and formed in the order of a first aeration section, a second aeration section, and so on. , the wastewater is sequentially passed through the aeration section, and the returned sludge is returned to the first aeration section, and the water temperature in the first aeration section is raised to 46 to 60° C. by the heat of the oxidation reaction of organic matter.
This is a biological treatment method for wastewater containing high concentration organic matter, characterized in that after the treatment is carried out while suppressing the production of x-, the organic matter remaining in the first aeration section is treated in the subsequent aeration sections.
本発明者は、前記の問題点を解決するために種々検討を
行った結果、硝化菌は培養条件によって若干具なるが、
水温が４６℃以上になると不可逆的に失活することを見
い出した。一方、ＢＯＤ酸化菌は６０℃程度までほとん
どその活性は損われないが、６６℃以上になると次第に
失活することを見い出した。As a result of various studies to solve the above-mentioned problems, the present inventor found that although nitrifying bacteria differ slightly depending on the culture conditions,
It has been found that when the water temperature rises to 46°C or higher, the activity is irreversibly deactivated. On the other hand, it has been found that BOD oxidizing bacteria hardly lose their activity up to about 60°C, but gradually lose their activity at temperatures above 66°C.
ＭＬＳ８３０００〜３２００η／ｌの１０倍希釈除渣し
尿を曝気槽滞留日数を１３日として曝気処理した場合の
曝気槽の水温と処理水質の関係を第１図に示す。FIG. 1 shows the relationship between the water temperature in the aeration tank and the quality of the treated water when 10-fold diluted human urine with an MLS of 83,000 to 3,200 η/l was aerated with the residence time in the aeration tank being 13 days.
第１図から曝気槽水温４６℃以上になると硝化菌の活性
は殆んど失なわれ、また６０℃以上になるとＢＯＤ酸化
菌の活性も失なわれることがわかる。From FIG. 1, it can be seen that when the water temperature in the aeration tank reaches 46°C or higher, the activity of nitrifying bacteria is almost lost, and when the water temperature reaches 60°C or higher, the activity of BOD oxidizing bacteria is also lost.
また、ＢＯＤ濃度（有機物濃度）の高い廃水を処理する
にあたシ、曝気槽を栓流が形成されるＩ！
ように分割すると前段の槽など水温が高くなることを確
認した。これは、高濃度の有機物を含む廃水は微生物酸
化に際して発生する熱量が高く、しかも廃水中の有機物
は酸化処理当初に急激に酸化分解することが主因である
。In addition, when treating wastewater with a high BOD concentration (organic matter concentration), a plug flow is formed in the aeration tank. It was confirmed that if the tank was divided into two parts, the water temperature in the front tank would become higher. The main reason for this is that wastewater containing a high concentration of organic matter generates a high amount of heat during microbial oxidation, and moreover, the organic matter in wastewater is rapidly oxidized and decomposed at the beginning of the oxidation treatment.
除渣し尿の曝気時間とＢＯＤ除去の関係を第２図に示す
。Figure 2 shows the relationship between the aeration time of the excreta and BOD removal.
第２図に示す曲線かられかるように、廃水中の有機物は
曝気処理当初に急激に分解することがわかる。As can be seen from the curve shown in Figure 2, organic matter in wastewater rapidly decomposes at the beginning of the aeration process.
本発明者は、原水中の有機物の酸化熱を曝気槽中の水温
の上昇に活用して、活性汚泥混合液中の硝化菌を失活せ
しめる方法について検討した結果曝気槽を厳密に分割す
ると原水の流入する前端槽の温度が有機物濃度によって
も異なるが４６℃以上になることを確認し、本発明をな
すに至った。The present inventor investigated a method of deactivating nitrifying bacteria in the activated sludge mixture by utilizing the heat of oxidation of organic matter in raw water to increase the water temperature in the aeration tank, and found that if the aeration tank is strictly divided, the raw water It was confirmed that the temperature of the front end tank into which the water flows is 46° C. or higher, although it varies depending on the organic matter concentration, and the present invention has been completed.
次に、本発明の一例を図面を参照しながら説明する。Next, an example of the present invention will be described with reference to the drawings.
第３図において、有機性炭素化合物とアンモニア（以下
ＮＨ３と記す）を含有する原水１は返送汚泥２とともに
第１曝気槽３に流入する。第１曝気槽３は高濃度の有機
物の酸化熱によって水温が４６℃以上に維持されている
ため、返送汚泥２中の硝化菌は高水温によって失活せし
められる。硝化菌の失活した活性汚泥混合液は第２曝気
槽４に流入し、液中に存在する残部の有機物が分解除去
される。この槽４では硝化菌は第１曝気槽３においてす
でに失活しているので、ＮＯｘ″″の生成は極度に抑制
される。次に活性汚泥混合液は沈殿槽５で処理水６と返
送汚泥２とに固液分離される。In FIG. 3, raw water 1 containing organic carbon compounds and ammonia (hereinafter referred to as NH3) flows into a first aeration tank 3 together with return sludge 2. Since the water temperature in the first aeration tank 3 is maintained at 46° C. or higher due to the heat of oxidation of highly concentrated organic matter, the nitrifying bacteria in the returned sludge 2 are inactivated by the high water temperature. The activated sludge mixture in which the nitrifying bacteria have been deactivated flows into the second aeration tank 4, where the remaining organic matter present in the liquid is decomposed and removed. In this tank 4, the nitrifying bacteria have already been deactivated in the first aeration tank 3, so the production of NOx'' is extremely suppressed. Next, the activated sludge mixture is separated into solid and liquid into treated water 6 and return sludge 2 in a settling tank 5.
第１曝気槽３の水温が４６℃以上に維持されず、例えば
３５℃前後になっていると逆に硝化を促進することにな
る。また水温が６６℃以上になると有機物を分解する菌
自体の活性も低下するので、第１曝気槽３の水温範囲は
４６〜６０℃に調整しなければならない。また、硝化菌
が高水温（４６〜６０℃）に接触する時間は水温によっ
ても異なるが、例えば４８℃で４時間程度、６０℃で５
分程度と短時間でよいので、第１曝気槽３の容量は第２
曝気槽４に比し、小容量でよく、逆に第１曝気槽３の方
の容積が大きいと水温の上昇に不利である。これは原水
１の有機物の槽容計あたりの酸化量を第１曝気槽６を小
さくすることによって多くすることができるからである
。If the water temperature in the first aeration tank 3 is not maintained at 46° C. or higher and is, for example, around 35° C., nitrification will be promoted. Furthermore, when the water temperature becomes 66°C or higher, the activity of the bacteria themselves that decompose organic matter decreases, so the water temperature range of the first aeration tank 3 must be adjusted to 46 to 60°C. In addition, the time that nitrifying bacteria are exposed to high water temperatures (46 to 60°C) varies depending on the water temperature, but for example, at 48°C it is about 4 hours, and at 60°C it is about 5 hours.
Since it only takes a short time of about minutes, the capacity of the first aeration tank 3 is the same as that of the second aeration tank.
Compared to the aeration tank 4, the first aeration tank 3 only needs to have a small capacity; on the other hand, if the volume of the first aeration tank 3 is large, it is disadvantageous for increasing the water temperature. This is because the amount of organic matter in the raw water 1 oxidized per tank volume can be increased by making the first aeration tank 6 smaller.
また、第１曝気槽５の水温は常時４６〜６０℃に保って
もよいが必らずしもその必要はなく、間欠的に４０〜６
０℃に保つようにしても十分に本発明の目的を達するこ
とができる。In addition, the water temperature of the first aeration tank 5 may be maintained at 46 to 60 degrees Celsius all the time, but it is not necessary to do so;
Even if the temperature is maintained at 0° C., the object of the present invention can be sufficiently achieved.
高濃度の有機物を含有する廃水の処理では、一般的に処
理工程で希釈を行う。これは希釈によって
■ 発泡を防止する、
■ 液の粘性を低下し液中への酸素移動速度を高める、
■ 液の粘性を低下し、沈殿槽における固液分離を促進
する
だめである。When treating wastewater containing high concentrations of organic matter, dilution is generally performed during the treatment process. This is because dilution: 1) prevents foaming; 2) lowers the viscosity of the liquid and increases the rate of oxygen transfer into the liquid; 2) lowers the viscosity of the liquid and promotes solid-liquid separation in the settling tank.
このように高濃度廃水にとって希釈は好ましい方法であ
り、本発明方法では第２曝気槽４は無希釈処理より希釈
処理を行う方が処理がより円滑になる。一方、第１曝気
部は無希釈で処理を行うのが好ましいが、原水１の有機
物濃度が著るしく高く、第１曝気槽の水温が６０℃を越
える場合には水温降下のため希釈水を注入しても何ら差
つかえがない。また返送汚泥量２を減少することによっ
て、第１曝気槽３の活性汚泥濃度を下げ、有機物の酸化
量を減少して第１曝気槽の水温を６０℃以下に下げるこ
ともできる。As described above, dilution is a preferable method for highly concentrated wastewater, and in the method of the present invention, the second aeration tank 4 can be processed more smoothly by dilution treatment than by non-dilution treatment. On the other hand, it is preferable to perform the treatment without dilution in the first aeration section, but if the concentration of organic matter in raw water 1 is extremely high and the water temperature in the first aeration tank exceeds 60°C, dilution water is added to lower the water temperature. There is no difference even if it is injected. Furthermore, by reducing the amount of returned sludge 2, the activated sludge concentration in the first aeration tank 3 can be lowered, the amount of organic matter oxidized can be reduced, and the water temperature in the first aeration tank can be lowered to 60° C. or lower.
さらに、原水１の注入を第４図に示すように第１、第２
曝気工程３，４に分割注入できるようにしておけば、第
１曝気槽６に注入する原水量を減少することによって該
曝気槽３の生成熱量を減少し水温を６０℃以下に保つこ
とも可能である。Furthermore, raw water 1 is injected into the first and second stages as shown in Figure 4.
By allowing split injection into the aeration steps 3 and 4, it is possible to reduce the amount of raw water injected into the first aeration tank 6, thereby reducing the amount of heat generated in the aeration tank 3 and keeping the water temperature below 60°C. It is.
第１曝気槽のエアレーションは酸素吸収効率のよいもの
を利用した方がエアレーションによる蒸発潜熱の量を少
なくできるので、水温上昇に都合がよい。このような方
法として、水中エアレータ、純酸素曝気法の利用が推奨
される。It is better to use aeration in the first aeration tank that has high oxygen absorption efficiency because the amount of latent heat of evaporation due to aeration can be reduced, which is convenient for raising the water temperature. As such methods, the use of underwater aerators and pure oxygen aeration methods are recommended.
第１曝気槽、第２曝気槽それぞれを、複数室に仕切って
おくようにしてもよい。Each of the first aeration tank and the second aeration tank may be partitioned into a plurality of rooms.
次に本発明の実施例について述べる。Next, examples of the present invention will be described.
実施にあたり、第１図に示したフローを用いた。第１曝
気槽、第２曝気槽は、小型のため槽容積あたりの面積が
大きく、熱放散率が高いので、保温材で覆った。For implementation, the flow shown in Figure 1 was used. The first aeration tank and the second aeration tank were covered with heat insulating material because they were small, had a large area per tank volume, and had a high heat dissipation rate.
実施例１
実施装置 本発明法 第１曝気槽２０ｔ（完全混合）第
２ ｔｔ ４Ｃ１ｔ（ｐ ）
比較例 曝気槽６０ｔ（完全混合）処理対象廃水
し尿 ＢＯＤ １２０００ｇｉ／１ＮＴ（３−Ｎ
３４００ ｔｔ
人工廃水Ｉ ＢＯＤ ２００００■／１ＮＩＩ（
ｓ−Ｎ ３０００ 〃
人工廃水ＩＩ ＢＯＤ １００００■／１ＮＨ３
−Ｎ ３００ｏ ｔｔ
水 温 し尿２人工廃水１．■ ２６℃希釈水（第
２曝気槽に注入） ２３℃酸素源 本発明方法 第
１＠気槽 純酸素第２ 〃 空 気
比 較 例 本発明方法と同寸の純酸
素と空気を用いた。Example 1 Implementation device Method of the present invention 1st aeration tank 20t (complete mixing) 2nd tt 4C1t (p) Comparative example Aeration tank 60t (complete mixing) Wastewater to be treated
Human waste BOD 12000gi/1NT (3-N
3400 tt Artificial wastewater I BOD 20000■/1NII (
s-N 3000 〃 Artificial wastewater II BOD 10000■/1NH3
-N 300o tt Water temperature Human waste 2 Artificial wastewater 1. ■ 26°C dilution water (injected into the second aeration tank) 23°C oxygen source Method of the present invention 1st @ Air tank Pure oxygen 2nd Air Comparison Example Pure oxygen and air of the same size as the method of the present invention were used.
処理条件と共に結果を表１に示す。The results are shown in Table 1 along with the processing conditions.
表１より同一容量の曝気槽を用いても本発明方法の沈殿
槽溢流水のＮ０ｘ−Ｎ濃度は比較例に比べて著しく低い
ものとなっていることがわかる。From Table 1, it can be seen that even when using an aeration tank with the same capacity, the NOx-N concentration in the overflow water from the settling tank in the method of the present invention is significantly lower than that in the comparative example.
比較例において、ＣＯＤＭｎ濃度が著しく高いのはＮＯ
ｘ−の大部分がＮｏ−であり、まだＳＳ濃度が高いのは
沈殿槽で脱窒が生じて活性汚泥が浮上したからである。In the comparative example, the CODMn concentration was significantly high in NO.
Most of the x- was No-, and the SS concentration was still high because denitrification occurred in the settling tank and activated sludge floated to the surface.
実施例２
実施例１と同一の第１．第２曝気槽を用いた廃水１の処
理において、水温５１℃の第１曝気槽に希釈水を注入し
て水温を６８℃に下げて２日間処理を行ったのちに再び
２日間５１℃に上昇し、この水温の上下を２０日間繰シ
返したところ、その間曝気槽中におけるＮＯｉの蓄積は
認められなかった。Example 2 The first example is the same as Example 1. In the treatment of wastewater 1 using the second aeration tank, dilution water was injected into the first aeration tank whose water temperature was 51°C, the water temperature was lowered to 68°C, and the water temperature was treated for 2 days, and then the water temperature rose again to 51°C for 2 days. However, when the water temperature was repeatedly raised and lowered for 20 days, no accumulation of NOi was observed in the aeration tank during that time.
（本発明の効果）
以上に述べたように、本発明によってＮＨ３を含有する
高濃度の有機物を含有する廃水の好気的処理における硝
化菌の活性を抑制することができる。これによってＮＯ
ｘの生成を抑制し、前述のＮＯｘの発生に付随して生ず
る種々の問題を解決することができる。(Effects of the Present Invention) As described above, the present invention makes it possible to suppress the activity of nitrifying bacteria in the aerobic treatment of wastewater containing a high concentration of organic matter, including NH3. With this, NO
By suppressing the generation of NOx, it is possible to solve the various problems that occur along with the generation of NOx described above.
第１図は、曝気槽の水温と処理水質の関係を示す図、第
２図は除渣し尿の曝気時間とＢＯＤ除１月
去の関係を示す図、第６図及び第４は本発明の詳
細な説明するだめのフロー概略図である。
１・・・原水、２・・・返送汚泥、３・・・第１曝気槽
、４・・・第２曝気槽、５・・・沈殿槽、６・・・処理
水、６′・・・希釈水Figure 1 is a diagram showing the relationship between the water temperature of the aeration tank and the quality of treated water, Figure 2 is a diagram showing the relationship between the aeration time of human waste and BOD removal, and Figures 6 and 4 are diagrams showing the relationship between the water temperature of the aeration tank and the quality of treated water. It is a flow schematic diagram which does not provide detailed explanation. 1... Raw water, 2... Returned sludge, 3... First aeration tank, 4... Second aeration tank, 5... Sedimentation tank, 6... Treated water, 6'... dilution water
Claims (1)
性汚泥処理する方法において、曝気部を少なくとも２分
割して第１曝気部、第２曝気部、−−−の順に形成し、
前記廃水を該曝気部に順次流過せしめ、且つ、返送汚泥
を前記第１曝気部に返送すると共に該第１曝気部の水温
を有機物の酸化反応熱によって４６〜６０℃に上昇せし
めてＮＯｘ＾−の生成を抑制しつつ処理したのち、前記
第１曝気部で残留した有機物を次段以降の曝気部で処理
することを特徴とする高濃度有機物含有廃水の生物学的
処理方法。 ２、前記第１曝気部の容積が、次段以降の曝気部の容積
より小容量に設定されている特許請求の範囲第１項記載
の方法。 ３、前記第１曝気部の水温を、間欠的に４６〜６０℃と
する特許請求の範囲第１項又は第２項記載の方法。 ４、前記第１曝気部の水温が、常時４６〜６０℃に保た
れている特許請求の範囲第１項又は第２項記載の方法。[Claims] 1. In a method for treating wastewater containing ammonia and high concentrations of organic matter with activated sludge, the aeration section is divided into at least two parts and formed in the order of a first aeration section, a second aeration section, and so on. death,
The wastewater is sequentially passed through the aeration section, and the returned sludge is returned to the first aeration section, and the water temperature in the first aeration section is raised to 46 to 60°C by the heat of the oxidation reaction of organic matter to eliminate NOx. - A biological treatment method for wastewater containing high concentration organic matter, characterized in that the organic matter remaining in the first aeration section is treated in a subsequent aeration section after the treatment is carried out while suppressing the production of wastewater. 2. The method according to claim 1, wherein the volume of the first aeration section is set to be smaller than the volume of the subsequent aeration sections. 3. The method according to claim 1 or 2, wherein the water temperature in the first aeration section is intermittently set at 46 to 60°C. 4. The method according to claim 1 or 2, wherein the water temperature in the first aeration section is always maintained at 46 to 60°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008004A JPS62168596A (en) | 1986-01-20 | 1986-01-20 | Biological treatment for waste water containing highly concentrated organic substance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008004A JPS62168596A (en) | 1986-01-20 | 1986-01-20 | Biological treatment for waste water containing highly concentrated organic substance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62168596A true JPS62168596A (en) | 1987-07-24 |
| JPH0510995B2 JPH0510995B2 (en) | 1993-02-12 |
Family
ID=11681218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61008004A Granted JPS62168596A (en) | 1986-01-20 | 1986-01-20 | Biological treatment for waste water containing highly concentrated organic substance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62168596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021013903A (en) * | 2019-07-12 | 2021-02-12 | 水ｉｎｇ株式会社 | Organic wastewater treatment method, and organic wastewater treatment device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5513121A (en) * | 1978-07-13 | 1980-01-30 | Ebara Infilco Co Ltd | Treatment of organic waste water |
-
1986
- 1986-01-20 JP JP61008004A patent/JPS62168596A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5513121A (en) * | 1978-07-13 | 1980-01-30 | Ebara Infilco Co Ltd | Treatment of organic waste water |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021013903A (en) * | 2019-07-12 | 2021-02-12 | 水ｉｎｇ株式会社 | Organic wastewater treatment method, and organic wastewater treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0510995B2 (en) | 1993-02-12 |
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