JPS60103000A - Acceleration of anaerobic digestion by high-frequency wave - Google Patents
Acceleration of anaerobic digestion by high-frequency waveInfo
- Publication number
- JPS60103000A JPS60103000A JP58212093A JP21209383A JPS60103000A JP S60103000 A JPS60103000 A JP S60103000A JP 58212093 A JP58212093 A JP 58212093A JP 21209383 A JP21209383 A JP 21209383A JP S60103000 A JPS60103000 A JP S60103000A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- sludge
- digested sludge
- irradiated
- digestion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は鎌気性消化法に係り、特に嫌気性微生物に高周
波を照射してその活性を高める方法に関する０
従来、下水汚泥、都市廃棄物叫有・１物を高濃度に含有
する廃棄物は嫌気性消化により処理されている。嫌気性
消化法では微生物による有機物を分解するため焼却など
の他の処理方法と比べて省エネルギー的であり、また生
成メタンガスを有効利用できるなど多くの特徴を有する
。しかし、従来の嫌気性消化法では消化日数が３０日な
いし５０日と非常に長いため装置規模が犬きく消化効率
も４０ないし５０％と低い。消化効率を向上させるため
に従来から多くの方法が提案されている。その１つは、
前処理により有機廃棄物を加熱してその基質を飾気性消
化されやすいものに転換する方法であり、他の方法とし
ては、二段消化法でありこれは第一消化により有機性廃
棄物を液化反応させて低分子脂肪酸に転換し、続いて第
二消化によりこの脂肪酸をガス化反応させる方法である
。これらの方法では装置が複雑化し運転費も嵩む。さら
にこ７（１らの方法は嫌気性消化反応に寄与する微生物
の活性は変わらないため消化効率の向上にも限界がある
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sickle aerobic digestion method, and in particular to a method for increasing the activity of anaerobic microorganisms by irradiating them with high frequencies. The waste contained in these plants is treated by anaerobic digestion. Anaerobic digestion uses microorganisms to decompose organic matter, so it is energy efficient compared to other processing methods such as incineration, and has many features such as being able to effectively utilize the methane gas produced. However, in the conventional anaerobic digestion method, the number of days for digestion is very long, 30 to 50 days, and the scale of the equipment is large, and the digestion efficiency is low, at 40 to 50%. Many methods have been proposed to improve digestion efficiency. One of them is
A pre-treatment method heats the organic waste to convert its substrate into a material that is easily digestible.Another method is the two-stage digestion method, in which the organic waste is liquefied in the first digestion. This method involves converting the fatty acids into low-molecular-weight fatty acids through a reaction, and then subjecting the fatty acids to a gasification reaction through a second digestion. These methods complicate the equipment and increase operating costs. Furthermore, these methods have a limit to improving digestion efficiency because the activity of microorganisms that contribute to the anaerobic digestion reaction remains the same.
本発明は従来法の欠点を改善し、微生物自体の活性を高
めることにより嫌気性消化反応を促進する方法を１２配
供することを目的とする。It is an object of the present invention to provide a method for improving anaerobic digestion reactions by improving the shortcomings of conventional methods and increasing the activity of microorganisms themselves.
発明の要点
すなわち本発明は、有機性廃棄物の嫌気性消化において
消化汚泥に周波数ＩＭＨ，Ｌないし５００ ＭＨ２の高
周波を照射して微生物の活性を高めることを特徴とする
、嫌気性消化の促進方法である。Summary of the Invention: The present invention provides a method for promoting anaerobic digestion, which is characterized in that in anaerobic digestion of organic waste, digested sludge is irradiated with high frequency waves with a frequency of IMH, L to 500 MH2 to increase the activity of microorganisms. It is.
発明の実施態様
本発明の方法に使用する有機性廃棄物は余剰汚泥あるい
は生汚泥等の下水汚泥、厨芥、農水産廃棄物等であり特
に限定されない。嫌気性消化条件は従来から知られてい
る条件であってよく、ｐＨ１温度、負荷、等を、１〜１
宜選定できる。本発明においては有機性廃棄物を嫌気性
消化しつつ、嫌気性消化槽内の消化汚泥に高周波を照射
する。高周波のなかでも特にＩ ＭＨ２ないし５００
ＭＨ，、が好適であり、１０ないし２ （１０ＭＩ（、
が特に好適である。高周波の照射方法は連続的、不連続
的、あるいはパルス的であっても」：い。パルス的に照
射する方法として、例えば１時間に消化汚泥１ ｃｃに
対し０．０１秒間ないし数秒間照射しこれを繰返す。好
ましいパルス照射法は消化汚泥１ ｃｃに対し００１秒
ないし０．１秒間の照射を３０分間に１回行う方法であ
る。消化槽内の全消化汚泥量を照射してもよいが、部分
的な照射であっても効果がある。照射に必要なエネルギ
ーは供給原料の種類あるいは消化条件等により異なるが
、１〜１００，０．００ Ｗ −ｈ ｒ／Ｍ−消化汚泥
であり、好ましくは１，０００ないし４，０００Ｗ−ｈ
ｒ／７７ｊ−消化汚泥である。高周波発生装置を消化槽
内に組込み、槽内の消化汚泥を直接高周波処理してもよ
いが、消化槽から消化汚泥を引き抜いて高周波を照射し
消化槽に返送する方式が好適に用いられろ。Embodiments of the Invention The organic waste used in the method of the present invention is not particularly limited, and includes sewage sludge such as surplus sludge or raw sludge, kitchen waste, agricultural and fishery waste, and the like. Anaerobic digestion conditions may be conventionally known conditions, such as pH, temperature, load, etc.
You can choose as you like. In the present invention, while organic waste is being anaerobically digested, the digested sludge in the anaerobic digestion tank is irradiated with high frequency waves. Among high frequencies, especially I MH2 to 500
MH,, is preferred, and 10 to 2 (10MI(,
is particularly suitable. The high-frequency irradiation method may be continuous, discontinuous, or pulsed. As a pulsed irradiation method, for example, 1 cc of digested sludge is irradiated for 0.01 seconds to several seconds per hour, and this is repeated. A preferred pulse irradiation method is a method in which 1 cc of digested sludge is irradiated for 0.01 to 0.1 seconds once every 30 minutes. The entire amount of digested sludge in the digester tank may be irradiated, but even partial irradiation is effective. The energy required for irradiation varies depending on the type of feedstock, digestion conditions, etc., but is 1 to 100,0.00 W-h r/M-digested sludge, preferably 1,000 to 4,000 W-h.
r/77j - Digested sludge. Although a high-frequency generator may be incorporated into the digestion tank and the digested sludge in the tank may be directly subjected to high-frequency treatment, it is preferable to use a method in which the digested sludge is extracted from the digestion tank, irradiated with high-frequency waves, and returned to the digestion tank.
第１図に、本発明の方法の１例を示す。本図では嫌気性
消化槽１から消化汚泥を引き抜き高周波照射装置２を経
て消化槽１に返送している。FIG. 1 shows an example of the method of the present invention. In this figure, digested sludge is extracted from an anaerobic digestion tank 1 and returned to the digestion tank 1 via a high-frequency irradiation device 2.
本発明では有機性廃棄物、すなわち消化槽への投入原料
に高周波照射を行うのではなく、消化汚泥、より正確に
言えば消化汚泥内の嫌気性菌に高周波を照射する。高周
波照射を受けた嫌気性菌はその活性が飛躍的に高まりガ
ス発生量が多くなりまた高負荷運転も可能となる等多く
の利点を有する。In the present invention, rather than irradiating organic waste, ie, the raw material input to the digester, with high frequency, the digested sludge, or more precisely, the anaerobic bacteria within the digested sludge, is irradiated with high frequency. Anaerobic bacteria exposed to high frequency irradiation have many advantages, such as dramatically increased activity, the ability to generate a large amount of gas, and the possibility of high-load operation.
化学物質を同定する手段としてその赤外線吸収スペクト
ルを調べる方法がある。これは、化学物質（特に有機物
）の有する原子団が特定波長の赤外線を吸収して伸縮振
動あるいは変角振動を起す現象を利用している。本発明
に用いる高周波は１ないし５００１ＶｒＨ２であり赤外
線のもつ周波数よりもはるかに低い。本発明の原理につ
いては必ずしも明確ではないが、消化汚泥内の有機物あ
るいは無機物は本発明の高周波処理によっても何ら影響
を受けていないと言える。従来、微生物に高周波を照射
すると微生物細胞が破壊されろと言われてきた。しかし
、本発明者の検討によれば嫌気性菌に対しては特定の高
周波を照射すると微生物細胞は破壊されずむしろ微生物
の活性を飛躍的に向」−することが見出されたのである
。One way to identify chemical substances is to examine their infrared absorption spectra. This utilizes the phenomenon in which atomic groups of chemical substances (particularly organic substances) absorb infrared rays of a specific wavelength and cause stretching vibrations or bending vibrations. The high frequency used in the present invention is 1 to 5001 VrH2, which is much lower than the frequency of infrared rays. Although the principle of the present invention is not necessarily clear, it can be said that the organic matter or inorganic matter within the digested sludge is not affected at all by the high frequency treatment of the present invention. Conventionally, it has been said that irradiating microorganisms with high frequency waves destroys microbial cells. However, according to studies conducted by the present inventors, it has been found that irradiating anaerobic bacteria with a specific high frequency does not destroy the microbial cells, but rather dramatically increases the activity of the microorganisms.
実施例 １
有効容積２．５１の消化槽を用いでんぷんとミルクから
なる模擬有機性廃棄物の＆ｆｆ気性消化を行った。消化
条件は、消化槽温度３７℃、消化日数４６日、有機物０
荷１．２ Ｆ−−ＶＳ Ｓ／１１／ｄ および２，４ｆ
ｌ−ＶＳＳ／ｌ／ｄである。消化槽から２１３７ｍ１ｎ
で消化汚泥を引き抜き６０１．ＩＩＨ，の高周波を３０
分間に１度消化汚泥Ｉ ＣＣに対し０．０３秒間照射し
、これを１日当り７時間行った。使用した高周波発生装
置の出力ば３ ＫＷである。一方、比較例として高周波
照射を行なわない場合についても同様に嫌気性消化を行
った。結果を第２図に示す。これより高周波処理を行う
ことによりガス発生量は３倍ないし４倍増加することが
わかる。Example 1 A pneumatic digestion of a simulated organic waste consisting of starch and milk was carried out using a digester with an effective volume of 2.51 cm. Digestion conditions were as follows: Digestion tank temperature: 37°C, digestion time: 46 days, organic matter 0
Load 1.2F--VS S/11/d and 2,4f
l-VSS/l/d. 2137m1n from the digestion tank
Pull out the digested sludge with 601. IIH, the high frequency of 30
The digested sludge ICC was irradiated for 0.03 seconds once every minute, and this was carried out for 7 hours per day. The output of the high frequency generator used was 3 kW. On the other hand, as a comparative example, anaerobic digestion was performed in the same manner without high-frequency irradiation. The results are shown in Figure 2. It can be seen from this that the amount of gas generated increases by three to four times by performing high frequency treatment.
本発明によれは嫌気性消化において嫌気性菌が高周波照
射により１１り性が著しく高まることにより、ガス発生
量は３倍ないし４倍」・〃加し、消化日数は従来の％以
下となるため高負荷運転も可能である。According to the present invention, in anaerobic digestion, the susceptibility of anaerobic bacteria to anaerobic bacteria is significantly increased by high-frequency irradiation, so the amount of gas generated is 3 to 4 times higher, and the number of days required for digestion is less than % of that of conventional methods. High load operation is also possible.
第１図は本発明の方法を示すフローシートであり、第２
図は経過時間とガス発生量の関係を示す線図で゛ある。
１・・・・・・・・嫌気性消化槽
２・・・・高周波発生装置FIG. 1 is a flow sheet showing the method of the present invention, and FIG.
The figure is a diagram showing the relationship between elapsed time and amount of gas generated. 1... Anaerobic digestion tank 2... High frequency generator
Claims (1)
周波数１■ｈないし５００Ｍ］−Ｔ７の高周波を照射す
ることを！＋＋ｆ像とする、嫌気性消化の促進方法。(1) In anaerobic digestion of organic waste, the digested sludge is irradiated with high frequency waves with a frequency of 1 h to 500 M]-T7! A method for promoting anaerobic digestion with a ++f image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58212093A JPS60103000A (en) | 1983-11-11 | 1983-11-11 | Acceleration of anaerobic digestion by high-frequency wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58212093A JPS60103000A (en) | 1983-11-11 | 1983-11-11 | Acceleration of anaerobic digestion by high-frequency wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60103000A true JPS60103000A (en) | 1985-06-07 |
Family
ID=16616754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58212093A Pending JPS60103000A (en) | 1983-11-11 | 1983-11-11 | Acceleration of anaerobic digestion by high-frequency wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60103000A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884983A (en) * | 1994-09-16 | 1996-04-02 | Agency Of Ind Science & Technol | Method and device for accelerating environmental revival |
| US20130149765A1 (en) * | 2011-05-11 | 2013-06-13 | Gary N. Austin | Anaerobic digester for the production of methane gas from organic waste |
| JP2014217815A (en) * | 2013-05-09 | 2014-11-20 | 株式会社アクトリー | Method for treating organic sludge |
-
1983
- 1983-11-11 JP JP58212093A patent/JPS60103000A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0884983A (en) * | 1994-09-16 | 1996-04-02 | Agency Of Ind Science & Technol | Method and device for accelerating environmental revival |
| US20130149765A1 (en) * | 2011-05-11 | 2013-06-13 | Gary N. Austin | Anaerobic digester for the production of methane gas from organic waste |
| JP2014217815A (en) * | 2013-05-09 | 2014-11-20 | 株式会社アクトリー | Method for treating organic sludge |
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