JP2003293860A - Methane fermentation treatment system and methane fermentation treatment method - Google Patents
Methane fermentation treatment system and methane fermentation treatment methodInfo
- Publication number
- JP2003293860A JP2003293860A JP2002103782A JP2002103782A JP2003293860A JP 2003293860 A JP2003293860 A JP 2003293860A JP 2002103782 A JP2002103782 A JP 2002103782A JP 2002103782 A JP2002103782 A JP 2002103782A JP 2003293860 A JP2003293860 A JP 2003293860A
- Authority
- JP
- Japan
- Prior art keywords
- methane
- power generation
- methane fermentation
- fermentation treatment
- biogas
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
-
- 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
- Y02W10/20—Sludge processing
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はメタン発酵処理シス
テムとメタン発酵処理方法に関し、詳しくは、メタン発
酵槽から発生したバイオガスを貯蔵するガスホルダー
と、このガスホルダーから送給されるバイオガスと空気
とを燃焼して発電する発電設備とを備えるメタン発酵処
理システムとメタン発酵処理方法に関する。TECHNICAL FIELD The present invention relates to a methane fermentation treatment system and a methane fermentation treatment method, and more particularly, to a gas holder for storing biogas generated from a methane fermentation tank, and a biogas fed from this gas holder. The present invention relates to a methane fermentation treatment system and a methane fermentation treatment method including a power generation facility that combusts air to generate electricity.
【０００２】[0002]
【従来の技術】生ゴミ、畜産廃棄物、各種汚泥、食品系
産業廃棄物などの処理システムとして、バクテリアを利
用するいわゆる微生物利用技術が行われていて、微生物
の発酵作用により、堆肥（コンポスト）を得る方法、発
生したメタン等を燃料として燃焼させ、ガスエンジン、
ガスタービン、マイクロガスタービン等を用いて発電機
を駆動させ発電させるシステムがある。微生物の発酵に
は、分子状酸素の存在下で処理を行う好気性発酵と、分
子状酸素を必要としない嫌気性発酵があり、いずれの方
式も採用されている。2. Description of the Related Art So-called microbial utilization technology utilizing bacteria has been carried out as a treatment system for raw garbage, livestock waste, various sludges, food-based industrial wastes, etc. Compost is produced by fermentation of microorganisms. To obtain the gas, burn the generated methane etc. as fuel,
There is a system that drives a generator to generate electricity using a gas turbine, a micro gas turbine, or the like. Microbial fermentation includes aerobic fermentation in which treatment is performed in the presence of molecular oxygen and anaerobic fermentation that does not require molecular oxygen, and either method is adopted.
【０００３】このような処理システムとして、従来、図
３に示すようなシステムがある。この処理システムは、
所定温度（３５〜５５℃）に加温されたメタン発酵槽１
に有機系廃棄物を投入して発酵させる。発生したメタン
等のバイオガスは、一旦、ガスホルダー２に貯蔵され、
所定量以上に貯槽された段階で、発電設備４に送給され
る。このようにして、バイオガス量をできるだけ所定以
上とし、このガスと外部から送給される空気とを燃焼に
適した比率（空燃比）に混合して、燃焼状態を安定させ
るようにしている。As such a processing system, conventionally, there is a system as shown in FIG. This processing system
Methane fermentation tank 1 heated to a predetermined temperature (35-55 ° C)
Ferment by adding organic waste to. Biogas such as generated methane is temporarily stored in the gas holder 2,
When the tank is stored in a predetermined amount or more, it is delivered to the power generation facility 4. In this way, the amount of biogas is set to a predetermined value or more as much as possible, and this gas and air fed from the outside are mixed in a ratio (air-fuel ratio) suitable for combustion to stabilize the combustion state.
【０００４】その際、ガス濃度を検知すべくメタン濃度
計３が、メタン発酵槽１とガスホルダー２との間に設置
されて、ガスホルダー２へ送られるガス濃度を検知し、
メタン発酵槽１でのガス生成状況を把握する目安にする
と共に、ガスホルダー２内でのメタン貯蔵量として、図
示はしないが、ガスホルダー２に取り付けられた圧力計
などによってガス圧を検知し、ガス圧がある程度以上に
なると、ポンプＰを介して発電設備を構成するガスエン
ジン等に送給して、別に送給される空気と混合し、発電
に寄与させるようにしている。At this time, a methane concentration meter 3 for detecting the gas concentration is installed between the methane fermentation tank 1 and the gas holder 2 to detect the gas concentration sent to the gas holder 2,
Although not shown in the figure, the gas pressure is detected by a pressure gauge attached to the gas holder 2 as a methane storage amount in the gas holder 2 as a guide for grasping the gas generation state in the methane fermentation tank 1. When the gas pressure exceeds a certain level, the gas is sent to the gas engine or the like that constitutes the power generation facility via the pump P, mixed with the air that is sent separately, and contributes to the power generation.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、メタン
発酵槽から生成されるメタンガス濃度は変動が多く、生
成されるメタンガスを一旦貯蔵するガスホルダー貯蔵方
式を採用したとしても、ガスを確実に安定して発電設備
に供給することはできず、従って、従来のように、メタ
ン濃度計で、単にガスホルダーに送給するメタン濃度を
検知するのみでは、ガスホルダーから発電設備側に供給
されるメタンガスの送給を安定したものとすることはで
きない。しかも、メタン濃度計の測定値に基づいて、空
燃比を好ましい範囲にするような制御が行われていない
ため、発電効率は高いものとなっていない。However, the concentration of the methane gas produced from the methane fermentation tank varies greatly, and even if the gas holder storage system for temporarily storing the produced methane gas is adopted, the gas is reliably and stably produced. Since it cannot be supplied to the power generation equipment, therefore, as in the conventional case, by simply detecting the methane concentration sent to the gas holder with a methane concentration meter, the methane gas supplied from the gas holder to the power generation equipment side can be sent. The salary cannot be stable. Moreover, since the control for setting the air-fuel ratio within the preferable range is not performed based on the measurement value of the methane concentration meter, the power generation efficiency is not high.
【０００６】そこで、本発明の目的は、上記従来技術の
有する問題点に鑑みて、バイオガスの送給量を精度良く
迅速に測定すると共に、この測定値に基づいて発電設備
へ送給する空気量を制御できるようにし、発電設備での
燃焼状態を適したものにして、燃焼効率を高めることに
より発電効率を高いものにできるメタン発酵処理システ
ムとメタン発酵処理方法を提供することにある。Therefore, in view of the above problems of the prior art, an object of the present invention is to accurately and quickly measure the amount of biogas to be fed, and to feed air to power generation equipment based on this measured value. An object of the present invention is to provide a methane fermentation treatment system and a methane fermentation treatment method capable of controlling the amount, making the combustion state in the power generation equipment suitable, and increasing the combustion efficiency to increase the power generation efficiency.
【０００７】[0007]
【課題を解決するための手段】上記目的は各請求項記載
の発明により達成される。すなわち、本発明に係るメタ
ン発酵処理システムの特徴構成は、メタン発酵槽から発
生したバイオガスを貯蔵するガスホルダーと、このガス
ホルダーから送給されるバイオガスと空気とを燃焼して
発電する発電設備とを備えるメタン発酵処理システムに
おいて、前記発電設備の上流側にレーザー式メタンガス
濃度計を配置すると共に、この濃度計により検出された
メタンガス濃度測定値に基づいて、前記発電設備に送給
する燃焼用空気量を制御し、燃焼効率の向上を可能にす
る制御機構を有することにある。The above objects can be achieved by the inventions described in the claims. That is, the characteristic configuration of the methane fermentation treatment system according to the present invention is a gas holder that stores biogas generated from a methane fermentation tank, and a power generation that combusts the biogas and air sent from this gas holder to generate electricity. In a methane fermentation treatment system including equipment, a laser-type methane gas concentration meter is arranged on the upstream side of the power generation facility, and based on the measured value of the methane gas concentration detected by this concentration meter, the combustion is sent to the power generation facility. It is to have a control mechanism that controls the amount of air used and enables improvement of combustion efficiency.
【０００８】この構成によれば、レーザー式メタンガス
濃度計はメタン等のバイオガスの測定精度が高く、応答
速度が極めて速いため、その測定値に基づいて、発電設
備に送給する燃焼用空気量を制御するようにすると、迅
速で確実な制御が可能になり、従って、空気過剰率を所
定の値に保持でき、発電設備での燃焼効率を常時適した
状態に維持することが可能になり、燃焼効率の高い発電
設備の操業が可能になる。その結果、メタン発酵槽から
生成するバイオガスを迅速に測定すると共に、この測定
値に基づいて発電設備へ送給する空気量を制御できるよ
うにし、発電設備での燃焼状態を適したものにして、燃
焼効率を高めることにより発電効率を高いものにできる
メタン発酵処理システムを提供することができた。According to this structure, the laser type methane gas concentration meter has a high measurement accuracy of biogas such as methane and an extremely fast response speed. Therefore, based on the measured value, the amount of combustion air to be sent to the power generation equipment is measured. If it is controlled, it becomes possible to perform a quick and reliable control, therefore, it is possible to maintain the excess air ratio at a predetermined value, and it is possible to always maintain the combustion efficiency in the power generation equipment in a suitable state, It is possible to operate power generation equipment with high combustion efficiency. As a result, the biogas produced from the methane fermentation tank can be quickly measured, and the amount of air sent to the power generation equipment can be controlled based on this measurement value to optimize the combustion state in the power generation equipment. In addition, it was possible to provide a methane fermentation treatment system that can increase power generation efficiency by increasing combustion efficiency.
【０００９】前記レーザー式メタンガス濃度計の下流側
に流量計を設けると共に、前記制御機構は、前記流量計
の測定値と前記レーザー式メタンガス濃度計の測定値と
から、前記発電設備に送給される燃焼用空気量を制御す
ることが好ましい。A flow meter is provided on the downstream side of the laser type methane gas concentration meter, and the control mechanism supplies the power generation equipment from the measured value of the flow rate meter and the measured value of the laser type methane gas concentration meter. It is preferable to control the amount of combustion air.
【００１０】この構成によれば、レーザー式メタンガス
濃度計と流量計との組み合わせにより、生成されたバイ
オガスの発生量がより正確に検出できるので、送給する
燃焼用空気量をより精度良く制御できて、発電設備での
燃焼効率を一層適した状態に維持することが可能にな
り、燃焼効率のより高い発電設備の操業が可能になる。According to this structure, the amount of generated biogas can be detected more accurately by combining the laser type methane gas concentration meter and the flow meter, so that the amount of combustion air to be fed can be controlled more accurately. As a result, it becomes possible to maintain the combustion efficiency in the power generation equipment in a more suitable state, and it becomes possible to operate the power generation equipment with higher combustion efficiency.
【００１１】又、本発明に係るメタン発酵処理方法の特
徴構成は、メタン発酵槽から発生したバイオガスと空気
とを発電設備に送給し、燃焼して発電する方法におい
て、前記バイオガスの濃度をレーザー式メタンガス濃度
計により測定すると共に、この濃度計によに測定された
測定値に基づいて、前記発電設備に送給する燃焼用空気
量を制御し、燃焼効率の向上を可能にすることにある。Further, a characteristic constitution of the methane fermentation treatment method according to the present invention is that the biogas generated from a methane fermentation tank and air are fed to a power generation facility and burned to generate electricity, wherein the concentration of the biogas is Is measured by a laser-type methane gas concentration meter, and based on the measurement value measured by this concentration meter, the amount of combustion air sent to the power generation equipment is controlled to improve combustion efficiency. It is in.
【００１２】この構成によれば、メタンガスの送給量を
精度良く迅速に測定すると共に、この測定値に基づいて
発電設備へ送給する空気量を制御できるようにし、発電
設備での燃焼状態を適したものにして、燃焼効率を高め
ることにより発電効率を高いものにできるメタン発酵処
理方法を提供することができる。According to this structure, the amount of methane gas fed can be measured accurately and quickly, and the amount of air fed to the power generation facility can be controlled based on the measured value, so that the combustion state in the power generation facility can be controlled. It is possible to provide a methane fermentation treatment method which can be made suitable to increase power generation efficiency by increasing combustion efficiency.
【００１３】[0013]
【発明の実施の形態】本発明の実施の形態を、図面を参
照して詳細に説明する。図１は、本実施形態に係るメタ
ン発酵処理システムの一例を表す概略全体構造を示す。
メタン発酵槽１から発生したメタン等のバイオガスは回
収装置であるガスホルダー２で貯蔵され、更にこのバイ
オガスがガスエンジン、発電機などを備えた発電設備４
に送給されることは従来と同様であるが、ガスホルダー
２から発電設備４に送給されるバイオガスを測定するレ
ーザー式メタンガス濃度計Ｓが発電設備４の上流側に設
けられており、このレーザー式メタンガス濃度計Ｓの測
定結果が制御器１７に送信されるようになっている点、
この制御器１７（図３参照）から発電設備４に送給され
る空気量を制御する機構が設けられている点が大きく異
なる。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic overall structure showing an example of a methane fermentation treatment system according to the present embodiment.
Biogas such as methane generated from the methane fermentation tank 1 is stored in a gas holder 2 which is a recovery device, and the biogas is further equipped with a power generation facility 4 including a gas engine, a generator and the like.
It is the same as the conventional one, but a laser-type methane gas concentration meter S for measuring the biogas sent from the gas holder 2 to the power generation equipment 4 is provided on the upstream side of the power generation equipment 4, The measurement result of the laser type methane gas concentration meter S is transmitted to the controller 17,
A major difference is that a mechanism for controlling the amount of air sent from the controller 17 (see FIG. 3) to the power generation equipment 4 is provided.
【００１４】レーザー式メタンガス濃度計Ｓの下流側に
は、流量計５が設けられており、この流量計５による測
定値も同様に制御器１７に送信されるようになってい
る。この流量計５が設けられていると、レーザー式メタ
ンガス濃度計Ｓにより測定されるバイオガス濃度と併せ
て、発電設備４に送給される燃料ガス量を一層精度よく
算出できて好ましい。そして、この燃料ガス量の算出値
に基づいて、制御器１７から、発電設備４に送給される
空気量、空気流路途中に設けられたダンパー６の開閉度
を変えるように指示することにより制御し、発電設備４
に送給される空気量を、常時最適の空燃比となるように
している。A flow meter 5 is provided on the downstream side of the laser type methane gas concentration meter S, and the measured value by the flow meter 5 is also transmitted to the controller 17. It is preferable that the flow meter 5 is provided because the amount of fuel gas to be fed to the power generation facility 4 can be calculated with higher accuracy together with the biogas concentration measured by the laser methane gas concentration meter S. Then, based on the calculated value of the fuel gas amount, the controller 17 instructs the controller 17 to change the amount of air sent to the power generation facility 4 and the opening / closing degree of the damper 6 provided in the middle of the air flow path. Control and power generation equipment 4
The amount of air sent to the engine is always set to the optimum air-fuel ratio.
【００１５】次に、レーザー式メタンガス濃度計Ｓを、
図２を参照しつつ詳細に説明する。Next, the laser type methane gas concentration meter S
This will be described in detail with reference to FIG.
【００１６】このレーザー式メタンガス濃度計Ｓは、ガ
スホルダー２の排出口から発電設備４に向けてガスを送
給する途中のガス送給配管７に装着されていて、生じた
メタンガスを精度良く、かつ迅速に検出可能になってい
る。レーザー式メタンガス濃度計Ｓは、ガス送給配管７
の一方側である第１側壁部分に形成した第１測定窓１２
Ａにレーザー投射器１４Ａを臨ませると共に、第１側壁
部分に対向する他方側の第２側壁部分に形成した第２測
定窓１２Ｂにレーザー受信器１４Ｂを臨ませ、レーザー
投射器１４Ａとレーザー受信器１４Ｂを光ファイバーケ
ーブル１３を介して濃度計本体に接続して構成してあ
る。濃度計本体としては、レーザー発信器３１と信号処
理器２１を備える。This laser type methane gas concentration meter S is mounted on a gas feed pipe 7 which is in the middle of feeding gas from the outlet of the gas holder 2 to the power generation equipment 4, and accurately produces the generated methane gas. And it can be detected quickly. The laser type methane gas concentration meter S is a gas supply pipe 7
First measurement window 12 formed on the first side wall portion which is one side
A laser projector 14A is made to face A, and a laser receiver 14B is made to face a second measurement window 12B formed on a second side wall portion on the other side facing the first side wall portion. 14B is connected to the densitometer main body via an optical fiber cable 13. The densitometer body includes a laser oscillator 31 and a signal processor 21.
【００１７】レーザー発信器３１が、波長をスキャンし
ながら強さ一定のレーザー光を発する。このレーザー光
を、レーザー投射器１４Ａで一定のビーム径に調整して
から、ガスホルダー２から排出されるバイオガスに直接
照射し通過させる。そして、レーザー受信器１４Ｂで残
存のレーザー光強度を測定し、信号処理器２１によって
バイオガス濃度を検出する。メタンガスが検出される
と、信号処理器２１から検出結果が制御器１７に送信さ
れる。更に、配管７の下流側に配置されたの流量計５に
より、配管中を流れるバイオガスの流量が測定されて、
その測定結果も制御器１７に送信されるので、レーザー
式メタンガス濃度計Ｓにより検出されたメタンガス濃度
と共に、流量計５による流量値を加味したバイオガス量
（濃度×流量）が制御器１７により算出される。この算
出結果に基づいて、制御器１７から発電設備４に送給さ
れる空気量を制御すべく、ダンパー６の開閉度合いを指
示する信号が発せられる。The laser oscillator 31 emits a laser beam having a constant intensity while scanning the wavelength. The laser beam is adjusted to a constant beam diameter by the laser projector 14A, and then the biogas discharged from the gas holder 2 is directly irradiated and passed. Then, the laser receiver 14B measures the remaining laser light intensity, and the signal processor 21 detects the biogas concentration. When methane gas is detected, the detection result is transmitted from the signal processor 21 to the controller 17. Furthermore, the flow rate of the biogas flowing in the pipe is measured by the flow meter 5 arranged on the downstream side of the pipe 7,
Since the measurement result is also transmitted to the controller 17, the controller 17 calculates the amount of biogas (concentration x flow rate) in consideration of the flow rate value of the flow meter 5 together with the methane gas concentration detected by the laser methane gas concentration meter S. To be done. Based on the calculation result, the controller 17 issues a signal instructing the opening / closing degree of the damper 6 in order to control the amount of air sent to the power generation equipment 4.
【００１８】この一連の動作により、発電設備４での燃
焼状態は、常時、最適の状態を維持可能になり、高い燃
焼効率を実現し操業が可能になる。もっとも、このよう
な一連の動作は、必ずしも自動的に行う必要はなく、バ
イオガス量の算出値に基づき、手動で各操作を行うよう
にしてもよい。尚、レーザー送受信箇所には、送受信器
表面のガラスに汚れが付着するのを防止するため、水蒸
気あるいは窒素などのガスを送り込むようにしてもよ
い。By this series of operations, the combustion state in the power generation equipment 4 can always be maintained in an optimum state, and high combustion efficiency can be realized and operation becomes possible. However, such a series of operations does not necessarily have to be automatically performed, and each operation may be manually performed based on the calculated value of the biogas amount. It should be noted that gas such as water vapor or nitrogen may be fed to the laser transmitting / receiving portion in order to prevent dirt from adhering to the glass on the surface of the transmitter / receiver.
【００１９】〔別実施の形態〕
（１）本発明のメタン発酵処理システムに用いられるメ
タン発酵槽は、好気性発酵を行うものでも、嫌気性発酵
を行うもののいずれでもよい。[Other Embodiments] (1) The methane fermentation tank used in the methane fermentation treatment system of the present invention may be either an aerobic fermentation tank or an anaerobic fermentation tank.
【００２０】（２）嫌気発酵槽としては、縦型槽、横型
槽など、特に限定されることなく種々のものを使用でき
るが、密封して嫌気発酵処理可能な横型の発酵槽を使用
してもよい。つまり、この発酵槽内部に挿入されて嫌気
性菌を保持可能な固定床を備え、発酵槽内の入口側から
出口側に向けて被処理物を送給する送給手段と接続可能
になっている。このようになっていると、手間のかかる
前処理を必要とする副資材を処理の都度用いる必要がな
いので、処理コストを低くすることができ、しかも固定
床に嫌気性菌を培養することにより、処理能力を十分高
く維持することができて、安価に嫌気性発酵ガスが得ら
れる。しかも、被処理物を槽内の横方向に押し出すよう
にしているため、強力でエネルギーコストの低い油圧式
の押出し手段などを使用できるので、被処理物をほとん
ど希釈する必要がなく、格別大規模な排水処理設備を必
要とせず、排水処理コストも低く押さえることができ
る。又、発酵槽に、投入された被処理物を緩速度で攪拌
可能な攪拌機構と、嫌気性菌の繁殖を促進可能にする加
熱手段とが設けられていることが好ましい。(2) As the anaerobic fermentation tank, various tanks such as a vertical tank and a horizontal tank can be used without particular limitation, but a horizontal tank capable of anaerobic fermentation treatment by sealing is used. Good. That is, the fermenter is equipped with a fixed bed capable of holding anaerobic bacteria and is connectable to the feeding means for feeding the object to be treated from the inlet side to the outlet side in the fermenter. There is. With such a configuration, it is not necessary to use an auxiliary material that requires a time-consuming pretreatment each time the treatment is performed, so that the treatment cost can be reduced, and further, by culturing the anaerobic bacteria in the fixed bed, The processing capacity can be maintained sufficiently high, and anaerobic fermentation gas can be obtained at low cost. Moreover, since the object to be processed is pushed out in the lateral direction in the tank, it is possible to use a powerful and low energy cost hydraulic extruding means, etc., so that there is almost no need to dilute the object to be processed, which is a particularly large scale. The wastewater treatment cost can be kept low without the need for special wastewater treatment equipment. In addition, it is preferable that the fermenter is provided with a stirring mechanism capable of stirring the input material to be treated at a slow speed and a heating means capable of promoting the growth of anaerobic bacteria.
【図１】本発明に係るメタン発酵処理システムの一実施
形態を表す概略全体構成図FIG. 1 is a schematic overall configuration diagram showing an embodiment of a methane fermentation treatment system according to the present invention.
【図２】可燃ガス検出器の配置を説明する断面図FIG. 2 is a cross-sectional view illustrating the arrangement of a combustible gas detector.
【図３】従来のメタン発酵処理システムを表す概略全体
構成図FIG. 3 is a schematic overall configuration diagram showing a conventional methane fermentation treatment system.
１ メタン発酵槽 ２ ガスホルダー ４ 発電設備 Ｓ レーザー式メタンガス濃度計 1 methane fermentation tank 2 gas holder 4 power generation equipment S laser type methane gas concentration meter
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０１Ｎ 21/39 Ｂ０９Ｂ 3/00 Ｄ Ｃ１０Ｌ 3/00 Ａ Ｆターム(参考） 2G059 AA01 BB01 CC13 EE01 EE12 GG01 GG09 JJ17 KK01 MM01 4D004 AA02 AA03 AA04 BA03 CA15 CA18 CB04 CB21 CB31 CB50 DA01 DA02 DA10 DA20 4D059 AA03 AA07 AA08 BA17 CA07 EA09 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI theme code (reference) G01N 21/39 B09B 3/00 D C10L 3/00 AF term (reference) 2G059 AA01 BB01 CC13 EE01 EE12 GG01 GG09 JJ17 KK01 MM01 4D004 AA02 AA03 AA04 BA03 CA15 CA18 CB04 CB21 CB31 CB50 DA01 DA02 DA10 DA20 4D059 AA03 AA07 AA08 BA17 CA07 EA09
Claims (3)
貯蔵するガスホルダーと、このガスホルダーから送給さ
れるバイオガスと空気とを燃焼して発電する発電設備と
を備えるメタン発酵処理システムにおいて、前記発電設
備の上流側にレーザー式メタンガス濃度計を配置すると
共に、この濃度計により検出されたメタンガス濃度測定
値に基づいて、前記発電設備に送給する燃焼用空気量を
制御し、燃焼効率の向上を可能にする制御機構を有する
ことを特徴とするメタン発酵処理システム。1. A methane fermentation treatment system comprising: a gas holder for storing biogas generated from a methane fermentation tank; and a power generation facility for burning biogas and air supplied from the gas holder to generate electricity. A laser methane gas concentration meter is arranged on the upstream side of the power generation facility, and based on the measured value of the methane gas concentration detected by this concentration meter, the amount of combustion air to be fed to the power generation facility is controlled to improve the combustion efficiency. A methane fermentation treatment system having a control mechanism that enables improvement.
側に流量計を設けると共に、前記制御機構は、前記流量
計の測定値と前記レーザー式メタンガス濃度計の測定値
とから、前記発電設備に送給される燃焼用空気量を制御
する請求項１のメタン発酵処理システム。2. A flow meter is provided on the downstream side of the laser type methane gas concentration meter, and the control mechanism sends the measured value of the flow rate meter and the measured value of the laser type methane gas concentration meter to the power generation equipment. The methane fermentation treatment system according to claim 1, wherein the supplied combustion air amount is controlled.
空気とを発電設備に送給し、燃焼して発電するメタン発
酵処理方法において、前記バイオガスの濃度をレーザー
式メタンガス濃度計により測定すると共に、この濃度計
により測定された測定値に基づいて、前記発電設備に送
給する燃焼用空気量を制御し、燃焼効率の向上を可能に
することを特徴とするメタン発酵処理方法。3. In a methane fermentation treatment method in which biogas and air generated from a methane fermentation tank are fed to a power generation facility and burned to generate electricity, the concentration of the biogas is measured by a laser methane gas concentration meter. A methane fermentation treatment method characterized in that, based on a measurement value measured by this densitometer, the amount of combustion air fed to the power generation equipment is controlled to enable improvement of combustion efficiency.
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| WO2006070442A1 (en) * | 2004-12-27 | 2006-07-06 | Kawasaki Jukogyo Kabushiki Kaisha | Gas calorie variation suppressor, fuel gas supply facility, gas turbine facility and boiler facility |
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| KR100875498B1 (en) | 2005-01-26 | 2008-12-22 | 카와사키 주코교 카부시키 카이샤 | Gas calorie fluctuation suppressor, fuel gas supply equipment, gas turbine equipment and boiler equipment |
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