JPH04114799A - Methane fermentation - Google Patents
Methane fermentationInfo
- Publication number
- JPH04114799A JPH04114799A JP2232908A JP23290890A JPH04114799A JP H04114799 A JPH04114799 A JP H04114799A JP 2232908 A JP2232908 A JP 2232908A JP 23290890 A JP23290890 A JP 23290890A JP H04114799 A JPH04114799 A JP H04114799A
- Authority
- JP
- Japan
- Prior art keywords
- fermentation
- methane fermentation
- adsorbent
- basic
- methane
- 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
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000855 fermentation Methods 0.000 title claims abstract description 40
- 230000004151 fermentation Effects 0.000 title claims abstract description 40
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000003463 adsorbent Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 7
- 150000002897 organic nitrogen compounds Chemical class 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 36
- 229910021529 ammonia Inorganic materials 0.000 abstract description 18
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000001079 digestive effect Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 239000011973 solid acid Substances 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 239000002250 absorbent Substances 0.000 abstract 1
- 230000002745 absorbent Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 210000003608 fece Anatomy 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 244000144972 livestock Species 0.000 description 4
- 238000003113 dilution method Methods 0.000 description 3
- 230000002401 inhibitory effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000010871 livestock manure Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- -1 livestock dung Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 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
- 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)
Abstract
Description
【発明の詳細な説明】 Ａ、産業上の利用分野 本発明は、メタン発酵方法に関する。[Detailed description of the invention] A. Industrial application field The present invention relates to a methane fermentation method.
Ｂ０発明の概要
本発明は、例えば畜ふん等の有機窒素化合物を含む発酵
原料を発酵させる際に、上記有機窒素化合物により発生
するアンモニア等の塩基性ガスを上記発酵原料に難溶性
の塩基性ガス吸着剤により除去するようにしたものであ
る。B0 Summary of the Invention The present invention provides, for example, when fermenting a fermentation raw material containing an organic nitrogen compound such as livestock dung, a basic gas such as ammonia generated by the organic nitrogen compound is converted into a basic gas that is poorly soluble in the fermentation raw material. It is designed to be removed using an adsorbent.
Ｃ１従来の技術
従来、例えば畜ふん等の有機窒素化合物を含む発酵原料
の実用的な発酵法として、畜ふん等の発酵原料をスクリ
ュープレスを用いて圧搾し、その圧搾無希釈液を発酵槽
に投入してメタン発酵を行う高負荷−無希釈法が知られ
ている。C1 Conventional technology Conventionally, as a practical fermentation method for fermentation raw materials containing organic nitrogen compounds, such as livestock dung, fermentation raw materials such as livestock dung are compressed using a screw press, and the compressed undiluted liquid is transferred to a fermenter. A high-load, no-dilution method is known in which methane fermentation is carried out by adding methane.
この高負荷−無希釈法は、畜ふん等に含まれる生物分解
が困難な粗大固形物を排除して比較的分解が容易な基質
を投入しているため、処理効率が高い。This high-load, no-dilution method has high treatment efficiency because coarse solids that are difficult to biodegrade, such as those contained in livestock manure, are removed and substrates that are relatively easily decomposed are introduced.
このため、発酵槽加温に自己消費するガス量を差し引い
た利用可能ガス発生量が多いという特徴を有する。For this reason, it has the characteristic that the amount of usable gas generated is large after subtracting the amount of gas self-consumed for heating the fermenter.
Ｄ１発明が解決しようとする課題
しかし、従来の発酵方法、例えば上記の高負荷・無希釈
法においては、発酵の際にメタンと二酸化炭素、及び蛋
白質等の有機窒素化合物か分解され、以下に示すように
発酵を阻害する塩基性ガスのアンモニア等が生じる。D1 Problems to be Solved by the Invention However, in conventional fermentation methods, such as the above-mentioned high-load, non-dilution method, methane, carbon dioxide, and organic nitrogen compounds such as proteins are decomposed during fermentation, resulting in the following: As a result, basic gases such as ammonia, which inhibit fermentation, are generated.
即ち、上記二酸化炭素の一部は水に溶解して重炭酸イオ
ンとなり、これによりアンモニアは中和されて重炭酸ア
ンモニウムとなるが、一部のアンモニアは下式のように
遊離アンモニアとして存在する。That is, a portion of the carbon dioxide is dissolved in water and becomes bicarbonate ions, and ammonia is thereby neutralized and becomes ammonium bicarbonate, but a portion of the ammonia exists as free ammonia as shown in the formula below.
ＮＨ４＋コＮＨ３＋Ｈ”
また、上記遊離アンモニアとアンモニウムイオンには下
式のような関係があり、畜ふんのような窒素化合物を多
く含む発酵原料を使用した場合、アンモニアが発酵液の
緩衝能力をこえて発生してｐＨか上昇し、メタン発酵が
阻害される危険性がある。Additionally, there is a relationship between the above free ammonia and ammonium ion as shown in the following formula, and when fermentation raw materials containing a large amount of nitrogen compounds such as animal manure are used, ammonia may exceed the buffering capacity of the fermentation solution. There is a risk that the pH will rise and methane fermentation will be inhibited.
更に、畜ふんの組成はかなり変動があり、特に尿が混入
すると尿素の分解により総アンモニア濃度とｐＨが上昇
してメタン発酵が阻害される危険性が高くなり、遊離ア
ンモニア濃度が１リツトルあたーリ２００ｍｇを超える
とメタン発酵が阻害されることが報告されている。Furthermore, the composition of animal manure is highly variable, especially when urine is mixed in, increasing the total ammonia concentration and pH due to the decomposition of urea, increasing the risk of inhibiting methane fermentation, and increasing the free ammonia concentration per liter. It has been reported that methane fermentation is inhibited when the amount exceeds 200 mg.
上記の遊離アンモニアによる阻害を防止するには、発酵
液を水で希釈して総アンモニア濃度を下げることか考え
られるが、発酵槽内の嫌気性微生物が流出する恐れがあ
るため操作が難しい。One possible way to prevent the inhibition caused by free ammonia is to dilute the fermentation liquid with water to lower the total ammonia concentration, but this is difficult to do because the anaerobic microorganisms in the fermenter may flow out.
また、酸を添加してｐＨを下げる方法も考えられるが、
この場合はｐＨ制御が難しく、局部的に過度にｐＨが低
下して遊離有機酸が生じて嫌気性菌が阻害される危険性
がある上、一般に酸の取り扱いは難しく、危険が伴うと
いう問題点がある。Another possibility is to add acid to lower the pH.
In this case, it is difficult to control the pH, and there is a risk that the local pH will drop excessively and free organic acids will be generated, inhibiting anaerobic bacteria.In addition, handling acids is generally difficult and dangerous. There is.
本発明はこのような背景の下になされたものであり、操
作が容易で安全な、発酵槽内の塩基性ガス除去方法を提
供することを目的とする。The present invention was made against this background, and an object of the present invention is to provide a method for removing basic gas in a fermenter that is easy to operate and safe.
２０課題を解決するための手段
上記の課題を解決するために、本発明は、有機窒素化合
物を含む発酵原料を用いたメタン発酵方法において、発
酵原料に難溶性の塩基性ガス吸着剤を混合添加して発生
した塩基性ガスを吸着することを特徴とする。20 Means for Solving the Problems In order to solve the above problems, the present invention provides a methane fermentation method using fermentation raw materials containing organic nitrogen compounds, in which a poorly soluble basic gas adsorbent is mixed and added to the fermentation raw materials. It is characterized by adsorbing basic gases generated.
Ｆ、実施例
本実施例においては、発酵原料として畜ふんの搾汁液を
用い、塩基性ガス吸着剤としてその組成がＡｌＨ２ＰＯ
，。・２Ｈ２０で表される固体酸をメタン発酵槽に添加
することにより、メタン発酵を阻害する遊離アンモニア
を吸着除去して発酵液の遊離アンモニア濃度及びｐＨを
低下させ、メタン発酵がアンモニアにより阻害されるこ
とを抑制している。F. Example In this example, the juice of livestock dung was used as the fermentation raw material, and the composition was AlH2PO as the basic gas adsorbent.
,.・By adding a solid acid represented by 2H20 to the methane fermentation tank, free ammonia that inhibits methane fermentation is adsorbed and removed, reducing the free ammonia concentration and pH of the fermentation liquid, and methane fermentation is inhibited by ammonia. suppressing things.
上記塩基性ガス吸着剤の添加フローを第１図に示す。The addition flow of the basic gas adsorbent is shown in FIG.
第１図において１はメタン槽、２は原料混合貯留ビット
、３は塩基性ガス吸着剤注入装置、４は混合装置、５は
原料投入ポンプ、６は排出口である。In FIG. 1, 1 is a methane tank, 2 is a raw material mixing storage bit, 3 is a basic gas adsorbent injection device, 4 is a mixing device, 5 is a raw material input pump, and 6 is a discharge port.
上記塩基性ガス吸着剤は注入装置３より原料混合貯留ビ
ット２に投入され、混合装置４により混合されて原料投
入ポンプ５によりメタン発酵槽１に投入される。The basic gas adsorbent is introduced into the raw material mixing storage bit 2 from the injection device 3, mixed by the mixing device 4, and then introduced into the methane fermentation tank 1 by the raw material input pump 5.
上記のように添加された塩基性ガス吸着剤は遊離アンモ
ニア等を吸着した後消化液内に浮遊して排出口６から排
出される。The basic gas adsorbent added as described above adsorbs free ammonia and the like, then floats in the digestive fluid and is discharged from the discharge port 6.
本実施例においては、塩基性ガス吸着剤として、トリポ
リリン酸二水素アルミニウムを用いており、これは水に
難溶性の固体酸であるためメタン発酵極内の化学反応を
阻害する危険性が非常に小さくなっている。In this example, aluminum dihydrogen tripolyphosphate is used as the basic gas adsorbent, and since this is a solid acid that is poorly soluble in water, there is a high risk of inhibiting the chemical reaction inside the methane fermentation electrode. It's getting smaller.
Ｇ３発明の効果
本発明によれば、発酵原料にアンモニアやアミン等の塩
基性ガスを選択的に吸着する塩基性ガス吸着材を混合添
加している。G3 Effects of the invention According to the invention, a basic gas adsorbent that selectively adsorbs basic gases such as ammonia and amines is mixed and added to the fermentation raw material.
このため、容易かつ安全に、遊離アンモニア等の塩基性
ガスを吸着して、遊離塩基性ガスにより発酵が阻害され
ることを防ぐことができる。Therefore, basic gases such as free ammonia can be easily and safely adsorbed, and fermentation can be prevented from being inhibited by the free basic gases.
第１図は、本発明に係るメタン発酵方法の説明図である
。
■・・・メタン槽、２・・・原料混合貯留ビット、３・
・・塩基性ガス吸着剤注入装置、４・・・混合装置、５
・・・原料投入ポンプ、６・・・排出口、７・・・発酵
原料、８・・・消化液、９塩基性ガス吸着剤
外１名FIG. 1 is an explanatory diagram of the methane fermentation method according to the present invention. ■... Methane tank, 2... Raw material mixing storage bit, 3...
...Basic gas adsorbent injection device, 4...Mixing device, 5
... Raw material input pump, 6 ... Outlet, 7 ... Fermentation raw material, 8 ... Digestive fluid, 9 Basic gas adsorbent and 1 other person
Claims (1)
酵方法において、 発酵原料に難溶性の塩基性ガス吸着剤を混合添加して発
生した塩基性ガスを吸着することを特徴とするメタン発
酵方法。(1) A methane fermentation method using a fermentation raw material containing an organic nitrogen compound, characterized in that a poorly soluble basic gas adsorbent is mixed and added to the fermentation raw material to adsorb the generated basic gas. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2232908A JPH04114799A (en) | 1990-09-03 | 1990-09-03 | Methane fermentation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2232908A JPH04114799A (en) | 1990-09-03 | 1990-09-03 | Methane fermentation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04114799A true JPH04114799A (en) | 1992-04-15 |
Family
ID=16946726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2232908A Pending JPH04114799A (en) | 1990-09-03 | 1990-09-03 | Methane fermentation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04114799A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0628339A1 (en) * | 1993-06-14 | 1994-12-14 | VESTERAGER, Niels Ole | Method for extraction of undesirable substances in a gas |
| JP2001276880A (en) * | 2000-03-31 | 2001-10-09 | Ataka Construction & Engineering Co Ltd | Waste treatment method and device therefor |
| JP2002273489A (en) * | 2001-03-21 | 2002-09-24 | Mitsubishi Heavy Ind Ltd | Treatment method of liquid organic waste and system for the same |
-
1990
- 1990-09-03 JP JP2232908A patent/JPH04114799A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0628339A1 (en) * | 1993-06-14 | 1994-12-14 | VESTERAGER, Niels Ole | Method for extraction of undesirable substances in a gas |
| JP2001276880A (en) * | 2000-03-31 | 2001-10-09 | Ataka Construction & Engineering Co Ltd | Waste treatment method and device therefor |
| JP2002273489A (en) * | 2001-03-21 | 2002-09-24 | Mitsubishi Heavy Ind Ltd | Treatment method of liquid organic waste and system for the same |
| JP4558231B2 (en) * | 2001-03-21 | 2010-10-06 | 三菱重工環境・化学エンジニアリング株式会社 | Method and system for treating liquid organic waste |
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