JPH0818033B2 - Operation management method of high temperature anaerobic wastewater treatment equipment - Google Patents
Operation management method of high temperature anaerobic wastewater treatment equipmentInfo
- Publication number
- JPH0818033B2 JPH0818033B2 JP12735489A JP12735489A JPH0818033B2 JP H0818033 B2 JPH0818033 B2 JP H0818033B2 JP 12735489 A JP12735489 A JP 12735489A JP 12735489 A JP12735489 A JP 12735489A JP H0818033 B2 JPH0818033 B2 JP H0818033B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- wastewater treatment
- high temperature
- anaerobic wastewater
- management method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004065 wastewater treatment Methods 0.000 title claims description 12
- 238000007726 management method Methods 0.000 title claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 241000894006 Bacteria Species 0.000 description 13
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 244000005706 microflora Species 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 208000035404 Autolysis Diseases 0.000 description 2
- 206010057248 Cell death Diseases 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000028043 self proteolysis Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004900 autophagic degradation Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000000630 rising effect Effects 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Sludge (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は高濃度廃水処理に用いられる高温嫌気性廃水
処理装置の運転管理方法に関するものである。TECHNICAL FIELD The present invention relates to an operation management method of a high temperature anaerobic wastewater treatment device used for treatment of highly concentrated wastewater.
（従来の技術） 高温嫌気性廃水処理装置は高温メタン菌の活性が最も
大きくなる54℃付近の温度で運転されているが、装置を
停止させる場合には処理槽内の培養液の温度を常温にま
で下げており、また停止させた装置を復帰させる際に
は、常温から培養液を次第に昇温して処理温度まで高め
たのち、基質の投入を開始して段階的に負荷を上げてい
く必要がある。ところがこのような昇降温の際に、高温
メタン菌の自己消化や雑菌による菌相の変化が生じ、メ
タン菌量が減少したり不活性となることがあった。ま
た、廃水処理中に槽内液のPHが増加しマグネシウムやカ
ルシウム系の結晶物が析出して槽内閉塞を招くこともあ
った。従って復帰後に基質の投入を開始した際に酸発酵
が起こり易くなって処理状態が悪化し、そのために復帰
操作に多くの日数を要するという欠点があった。(Prior art) The high temperature anaerobic wastewater treatment equipment is operated at a temperature around 54 ° C, where the activity of high temperature methane bacteria is the highest, but when stopping the equipment, the temperature of the culture solution in the treatment tank should be kept at room temperature. The temperature of the culture solution is gradually raised from room temperature to the processing temperature when the stopped device is returned to normal, and then the substrate is added to increase the load stepwise. There is a need. However, during such temperature raising and lowering, the autophagy of high-temperature methane bacteria and changes in the microflora due to miscellaneous bacteria may occur, and the amount of methane bacteria may decrease or become inactive. Further, during the treatment of wastewater, the pH of the liquid in the tank was increased, and the magnesium- or calcium-based crystallized substances were sometimes precipitated, resulting in clogging in the tank. Therefore, there is a drawback that acid fermentation is likely to occur when the substrate is started to be fed after the recovery, and the processing condition is deteriorated, which requires many days for the recovery operation.
（発明が解決しようとする課題） 本発明は上記したような従来の問題点を解消して、昇
降温の際におけるメタン菌の自己消化や雑菌による菌相
の変化を防止するとともに、廃水処理中に槽内液のPHが
増加しマグネシウムやカルシウム系の結晶物が析出して
槽内閉塞を招くことを防止し、これによって復帰操作を
短い日数で完了させることができるようにした高温嫌気
性廃水処理装置の運転管理方法を提供するために完成さ
れたものである。(Problems to be Solved by the Invention) The present invention solves the above-described conventional problems, prevents autolysis of methane bacteria during temperature increase and decrease, and changes in the flora due to miscellaneous bacteria, and during wastewater treatment. High-temperature anaerobic wastewater that prevents the recovery operation from being completed within a short period of time by preventing the pH of the tank liquid from increasing and precipitating magnesium or calcium-based crystallized substances to block the tank. It has been completed in order to provide an operation management method for a processing device.
（課題を解決するための手段） 上記の課題は、高温嫌気性廃水処理装置を停止のため
に常温まで降温する際、あるいは復帰操作のために昇温
する際、35〜50℃の温度域における昇降温速度を0.5℃/
hr以上とするとともに、アルカリ度を1000mg/以上に
維持することを特徴とする高温嫌気性廃水処理装置の運
転管理方法によって解決される。(Means for Solving the Problems) The above-mentioned problems are caused in the temperature range of 35 to 50 ° C. when the temperature of the high temperature anaerobic wastewater treatment device is lowered to room temperature for the stop or when the temperature is raised for the returning operation. Temperature increase / decrease rate of 0.5 ° C /
The problem is solved by a method for operation and management of a high temperature anaerobic wastewater treatment device, which is characterized by maintaining an alkalinity of 1000 mg / min or more as well as an hour or more.
上記のように、本発明においては高温嫌気性菌にとっ
て最も危険な温度領域である35〜50℃を0.5℃/hr以上の
高速度で通り抜けることにより、この危険な温度領域に
おいて発生し易いメタン菌の自己消化や菌相の変化を最
小限に抑制する。これによってメタン菌の菌体量や活性
の維持を図ることができる。ここで35〜50℃における昇
降温速度を0.5℃/hr以上としたのは、これより昇降温速
度が低いとメタン菌の自己消化等が生じ易いためであ
る。なお昇降温速度はできるだけ大きいことが好ましい
が、その最大限は装置の容量や加熱冷却手段の能力によ
って定められ、実用の装置では昇降温速度の最大値は５
℃/hr程度となるのが普通である。また高温嫌気性菌は6
0℃以上では死滅したり活性が極めて低下するので、熱
交換器の出口温度を60℃以下に維持することが好まし
い。装置を停止させる場合には、本発明に従って0.5℃/
hr以上の降温速度で培養液を降温させたのち、槽内培養
液の50％程度を水と置換することが好ましい。但しアル
カリ度を100mg/以上に維持するようにする。これは降
温速度を下げるためと、槽内液のPHが増加しマグネシウ
ムやカルシウム系の結晶物が析出して槽内閉塞を招くこ
とを防止するためである。また水で弛緩することのほか
に、槽内圧力を150mmAq以上に維持することも効果的で
ある。これは停止中におけるPH上昇の原因となるCOzガ
スの大気中へのストリッピングを防止するためであり、
これによって停止中の槽内液のPHを6.5〜7.5に維持する
ことができる。このように停止中におけるPHの上昇を抑
制することにより、マグネシウムやカリウム系の結晶物
の析出を完全に防止することができる。As described above, in the present invention, by passing through 35 to 50 ° C, which is the most dangerous temperature region for thermophilic anaerobic bacteria, at a high speed of 0.5 ° C / hr or more, methane bacteria that are likely to occur in this dangerous temperature region. Minimize self-digestion and changes in microflora. This makes it possible to maintain the amount and activity of methane bacteria. The rate of temperature increase / decrease at 35 to 50 ° C is set to 0.5 ° C / hr or higher because autolysis of methane bacteria is likely to occur when the rate of temperature increase / decrease is lower than this. The temperature raising / lowering rate is preferably as high as possible, but the maximum is determined by the capacity of the apparatus and the capacity of the heating / cooling means, and the maximum value of the temperature raising / lowering rate is 5 in a practical apparatus.
It is usually about ℃ / hr. Also, thermophilic anaerobic bacteria are 6
If the temperature is 0 ° C or higher, the cells will be killed or the activity will be extremely lowered. Therefore, it is preferable to maintain the outlet temperature of the heat exchanger at 60 ° C or lower. In the case of shutting down the device, 0.5 ° C /
After lowering the temperature of the culture solution at a temperature lowering rate of not less than hr, it is preferable to replace about 50% of the culture solution in the tank with water. However, try to maintain the alkalinity at 100 mg / min. This is to reduce the temperature lowering rate and to prevent the PH of the liquid in the tank from increasing and precipitating magnesium- or calcium-based crystal substances to cause clogging in the tank. In addition to relaxing with water, maintaining the tank pressure at 150 mmAq or higher is also effective. This is to prevent the stripping of CO z gas into the atmosphere, which causes a rise in PH during suspension.
As a result, the pH of the in-tank solution that is stopped can be maintained at 6.5 to 7.5. In this way, by suppressing the increase in PH during suspension, it is possible to completely prevent the precipitation of magnesium- or potassium-based crystal substances.
また停止中の装置を復帰させる場合には、本発明の方
法に従って槽内液を54℃まで昇温させたのち、第１図に
示されるように、初日は停止前の定常運転時の負荷の25
％の負荷で運転し、２日目は50％、３日目は100％と段
階的に負荷を上昇させることにより、４日目からは定常
状態に復帰させることが可能である。Further, when returning the apparatus in the stopped state, the temperature of the liquid in the tank is raised to 54 ° C. according to the method of the present invention, and then, as shown in FIG. twenty five
It is possible to return to the steady state from the 4th day by gradually increasing the load to 50% on the 2nd day and 100% on the 3rd day by operating at a load of%.
（実施例） 54℃で運転されている嫌気性廃水処理装置を停止させ
る際に、槽内液を水と置換することにより第２図に示す
ように槽内を40℃まで５時間で急速に降温させ、更に30
℃まで20時間で降温させた。この場合、35℃〜50℃の温
度領域を約1.6℃/hrの降温速度で通過したこととなる。(Example) When stopping the anaerobic wastewater treatment device operated at 54 ° C, the inside of the tank was rapidly heated to 40 ° C in 5 hours by replacing the liquid in the tank with water, as shown in Fig. 2. Let it cool down, then 30
The temperature was lowered to ℃ in 20 hours. In this case, it means that the material has passed through the temperature range of 35 ° C to 50 ° C at a cooling rate of about 1.6 ° C / hr.
またこのように降温させた嫌気性廃水処理装置を復帰
させる際に、第２図に破線で示すように20℃から54℃ま
で23時間で急速に昇温度した。この場合、35℃〜50℃の
温度領域を10時間で通過したこととなり、その昇温速度
は1.5℃/hrである。この結果、昇降温過程においてメタ
ン菌の自己消化や菌相の変化等はほとんど生じることが
なく、基質の投入を開始した後は４日目から定常状態に
復帰させることができた。Further, when returning the anaerobic wastewater treatment apparatus cooled in this way, the temperature was rapidly raised from 20 ° C. to 54 ° C. in 23 hours as shown by the broken line in FIG. In this case, the temperature range of 35 ° C to 50 ° C was passed in 10 hours, and the temperature rising rate was 1.5 ° C / hr. As a result, in the temperature raising / lowering process, almost no self-digestion of methane bacteria, changes in the microflora, etc. occurred, and it was possible to return to the steady state from the 4th day after the introduction of the substrate was started.
（発明の効果） 本発明は以上に説明したように、高温嫌気性廃水処理
装置の停止あるいは復帰操作の際に、高温メタン菌にと
って最も危険な35〜50℃の温度領域を急速に通り抜ける
ことによりメタン菌の自己消化や菌相の変化を防止し、
メタン菌の菌体量や活性維持を可能としたものである。
従って本発明によれば、復帰操作を３〜４日という短期
間に完了させることができる。また廃水処理中における
結晶物の析出を確実に防止し、槽内の閉塞をなくするこ
とができる。(Effects of the Invention) As described above, the present invention is capable of rapidly passing through the temperature range of 35 to 50 ° C, which is the most dangerous for thermophilic methane bacteria, when stopping or returning the high temperature anaerobic wastewater treatment device. Prevents self-digestion of methane bacteria and changes in microflora,
It is possible to maintain the amount and activity of methane bacteria.
Therefore, according to the present invention, the return operation can be completed within a short period of 3 to 4 days. In addition, it is possible to reliably prevent the precipitation of crystalline substances during the treatment of wastewater and eliminate the clogging in the tank.
よって本発明は従来の問題点を一掃した高温嫌気性廃
水処理装置の運転管理方法として、産業の発展に寄与す
るところは極めて大である。Therefore, the present invention, as an operation management method for a high-temperature anaerobic wastewater treatment device that eliminates the conventional problems, is extremely important in contributing to the development of industry.
第１図は復帰操作時における負荷に増加割合を示すグラ
フ、第２図は実施例における昇降温の状況を示すグラフ
である。FIG. 1 is a graph showing the rate of increase in the load at the time of returning operation, and FIG. 2 is a graph showing the temperature rise / fall conditions in the embodiment.
Claims (1)
温まで降温する際、あるいは復帰操作のために昇温する
際、35〜50℃の温度域における昇降温速度を0.5℃/hr以
上とするとともに、アルカリ度を1000mg/以上に維持
することを特徴とする高温嫌気性廃水処理装置の運転管
理方法。1. When lowering the temperature of the high temperature anaerobic wastewater treatment device to room temperature for stopping or raising the temperature for returning operation, the temperature raising / lowering rate in the temperature range of 35 to 50 ° C. is 0.5 ° C./hr or more. In addition, the operation management method of the high temperature anaerobic wastewater treatment device, which is characterized by maintaining the alkalinity at 1000 mg / or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12735489A JPH0818033B2 (en) | 1989-05-20 | 1989-05-20 | Operation management method of high temperature anaerobic wastewater treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12735489A JPH0818033B2 (en) | 1989-05-20 | 1989-05-20 | Operation management method of high temperature anaerobic wastewater treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02307597A JPH02307597A (en) | 1990-12-20 |
| JPH0818033B2 true JPH0818033B2 (en) | 1996-02-28 |
Family
ID=14957862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12735489A Expired - Lifetime JPH0818033B2 (en) | 1989-05-20 | 1989-05-20 | Operation management method of high temperature anaerobic wastewater treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0818033B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5759840B2 (en) * | 2011-09-14 | 2015-08-05 | 水ｉｎｇ株式会社 | Method and apparatus for anaerobic treatment of pulp mill wastewater |
| JP2014030827A (en) * | 2013-11-21 | 2014-02-20 | Ihi Corp | Anaerobic treatment facility and anaerobic treatment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56124495A (en) * | 1980-01-22 | 1981-09-30 | Masakuni Kanai | Fermentation of methane |
-
1989
- 1989-05-20 JP JP12735489A patent/JPH0818033B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| Ｂ．アトキンソン，福井三郎外１名訳、バイオリアクター、昭和５２−７−２９、産業図書，Ｐ．２５ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02307597A (en) | 1990-12-20 |
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