JP5112482B2 - Construction method of cover sheet for methane fermentation tank and awning - Google Patents

Construction method of cover sheet for methane fermentation tank and awning Download PDF

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JP5112482B2
JP5112482B2 JP2010179631A JP2010179631A JP5112482B2 JP 5112482 B2 JP5112482 B2 JP 5112482B2 JP 2010179631 A JP2010179631 A JP 2010179631A JP 2010179631 A JP2010179631 A JP 2010179631A JP 5112482 B2 JP5112482 B2 JP 5112482B2
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cover sheet
reservoir
awning
waste water
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JP2012035222A (en
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実 深野
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Toshiba Corp
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    • 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

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本発明の実施形態は、メタン発酵槽及びこのメタン発酵槽に使用される天幕用カバーシートの施工方法に関する。   Embodiment of this invention is related with the construction method of the cover sheet | seat for awnings used for a methane fermentation tank and this methane fermentation tank.

従来、工場からの有機性廃水は、例えば、図６に示すように処理されている。即ち、工場１からの有機性廃水はボイラー２で加熱した後、メタン発酵槽３に送り、このメタン発酵槽で有機性廃水を約３５℃程度で発酵してメタンガスを回収し、残りの有機性廃水は素掘りの貯水池やタンク等に収容していた。   Conventionally, the organic waste water from a factory is processed as shown in FIG. 6, for example. That is, the organic wastewater from the factory 1 is heated by the boiler 2 and then sent to the methane fermentation tank 3 where the organic wastewater is fermented at about 35 ° C. to recover methane gas, and the remaining organic wastewater is recovered. Wastewater was stored in unearthed reservoirs and tanks.

ところで、有機性廃水等の液体を貯蔵するタンクは数多くあるが、大型のタンクを鋼板やコンクリートなどで構築すると巨額の設備費用が必要となる。このため、大型のタンクでは、大地形状を活用し、そこにシートを敷設してタンクを形成する方式が採用されている。この方式は、特に地価の安い海外で数多く使用されるケースがある。このシート式タンクの中で、気体と液体の両方を貯蔵する場合、カバーシートが必要になる。このカバーシートは場合によっては１００ｍ×１００ｍ以上の広さに及ぶ場合もあり、重量は２０トンを超えるケースもあり、巨大である。従って、巨大な構築物を目的に合わせてカバーシートを施工するには、技術とノウハウを必要とする。   By the way, there are many tanks for storing liquids such as organic waste water. However, if a large tank is constructed of steel plate or concrete, a huge amount of equipment is required. For this reason, in a large tank, a system is used in which the shape of the ground is utilized, and a tank is formed by laying a sheet there. There are many cases where this method is used overseas, especially at low land prices. In the case of storing both gas and liquid in this sheet type tank, a cover sheet is required. In some cases, the cover sheet may extend over a size of 100 m × 100 m, and the weight may be over 20 tons. Therefore, technology and know-how are required to construct a cover sheet for the purpose of a huge structure.

巨大な凹部形状を活用したガス貯蔵可能な密閉型タンクは、例えば次のようにして構築される。まず、例えば幅７ｍ、長さ約１００ｍ、重さ１．５トン程度の複数のロール形状のシートを展張した後、展張されたシートの端部同士を溶着，切断し、これを繰り返して１枚の底部用カバーシートを形成する。ここで、カバーシートの材質としては、例えばＨＤＰＥ（High-Density Polyethylene：高密度ポリエチレン）を用いる。つづいて、この底部用カバーシートを凹部形状の貯水池の底部及び傾斜した側壁に沿って敷設する。さらに、底部用カバーシートと同様な手法により形成した天幕用カバーシートを、貯水池全体を覆うように配置した後、端部を貯水池の土手部に固定して密閉型タンクを構築する。底部用カバーシートで覆われた貯水池には例えば工場からの有機性廃水などが収容され、有機性廃水で発生したメタンガスは天幕用カバーシートの内側に配置されたガス回収装置により回収される。   A sealed tank capable of storing gas utilizing a huge concave shape is constructed as follows, for example. First, for example, after a plurality of roll-shaped sheets having a width of about 7 m, a length of about 100 m, and a weight of about 1.5 tons are stretched, the ends of the stretched sheets are welded and cut, and this is repeated for one sheet. The bottom cover sheet is formed. Here, as a material of the cover sheet, for example, HDPE (High-Density Polyethylene) is used. Subsequently, the bottom cover sheet is laid along the bottom of the concave reservoir and the inclined side wall. Further, an awning cover sheet formed by the same method as that for the bottom cover sheet is arranged so as to cover the entire reservoir, and then the end is fixed to the bank portion of the reservoir to construct a sealed tank. The reservoir covered with the bottom cover sheet stores, for example, organic waste water from a factory, and methane gas generated from the organic waste water is recovered by a gas recovery device disposed inside the awning cover sheet.

特開２００４−６８３７６号公報JP 2004-68376 A

上述したように、天幕用カバーシートは凹部形状の貯水池の土手部に固定していた。しかし、貯水池の深さ、側壁の傾斜角度によってはタンク使用時に工場からの有機性廃水を注入し、ガスを発生させて天幕用カバーシートを膨らませると、天幕用カバーシートの余長が長いため、天幕用カバーシートが波打った状態になり、ガスの回収効率が低下するといった不都合があった。   As described above, the awning cover sheet is fixed to the bank portion of the recessed reservoir. However, depending on the depth of the reservoir and the inclination angle of the side wall, when the organic waste water from the factory is injected when the tank is used and gas is generated to inflate the awning cover sheet, the extra length of the awning cover sheet is long. The awning cover sheet is in a wavy state, and the gas recovery efficiency is reduced.

本発明はこうした事情を考慮してなされたもので、貯水池の深さや側壁形状によらず、天幕用カバーシートを弛みなく膨らませることが可能なメタン発酵槽、及び天幕用カバーシートの施工方法を提供することを目的とする。   The present invention has been made in consideration of such circumstances, and a methane fermentation tank capable of inflating a tent cover sheet without slacking regardless of the depth or side wall shape of the reservoir, and a method for constructing the tent cover sheet. The purpose is to provide.

実施形態のメタン発酵槽は、嫌気性有機物を含む廃水を収容するメタン発酵槽であり、前記廃水を収容する，内側周囲に傾斜部が形成された貯水池と、この貯水池を複数に仕切るコンクリート製の仕切り壁と、この仕切り壁の両側に夫々配置された，貯水池中の廃水を攪拌する攪拌装置と、前記貯水池の底部及び傾斜部と前記仕切り壁に配置された底部用カバーシートと、廃水で発生するメタンガスを内側に貯蔵するガス不透過性の天幕用カバーシートと、前記貯水池の土手部に環状に配置された，前記天幕用カバーシートの端部を固定するための固定具と、前記天幕用カバーシートの内側に配置されたメタンガス回収用の配管とを具備することを特徴とする。 The methane fermenter of the embodiment is a methane fermenter that contains wastewater containing anaerobic organic matter, and is made of concrete that partitions the reservoir into a plurality of reservoirs in which an inclined portion is formed around the inside, which contains the wastewater. Generated by the partition wall, the stirrer that stirs the wastewater in the reservoir, respectively disposed on both sides of the partition wall, the bottom and inclined portions of the reservoir, the cover sheet for the bottom portion disposed on the partition wall, and the wastewater A gas impervious awning cover sheet for storing methane gas to be stored inside, a fixture for fixing an end of the awning cover sheet, which is annularly disposed on the bank of the reservoir, and the awning And a methane gas recovery pipe disposed inside the cover sheet.

第１の実施形態に係るメタン発酵槽の説明図。Explanatory drawing of the methane fermenter which concerns on 1st Embodiment. 図１のメタン発酵槽の概略的な平面図。The schematic top view of the methane fermenter of FIG. 図１及び図２のメタン発酵槽を構成する貯水池の土手部に使用される固定部材の説明図。Explanatory drawing of the fixing member used for the bank part of the reservoir which comprises the methane fermentation tank of FIG.1 and FIG.2. 第２の実施形態に係るメタン発酵槽の説明図。Explanatory drawing of the methane fermenter which concerns on 2nd Embodiment. 図１のメタン発酵槽に使用される天幕用カバーシートの施工方法を工程順に示す説明図。Explanatory drawing which shows the construction method of the cover sheet | seat for awnings used for the methane fermentation tank of FIG. 1 in order of a process. 従来の工場からの有機性廃水の流れを示す説明図。Explanatory drawing which shows the flow of the organic waste water from the conventional factory.

以下、実施形態に係るメタン発酵槽、及びこのメタン発酵槽の一構成である天幕用カバーシートの施工方法について図面を参照して説明する。なお、実施形態は下記に述べることに限定されない。
（第１の実施形態）
本実施形態に係るメタン発酵槽について図１〜図３を参照して説明する。ここで、図１はメタン発酵槽の概略的な説明図、図２は図１のメタン発酵槽の概略的な平面図、図３はメタン発酵槽の一構成である貯水池の土手部に配置されるカバーシートの固定具の説明図である。 Hereinafter, the construction method of the cover sheet | seat for awnings which is one structure of this methane fermenter and the methane fermenter which concerns on embodiment is demonstrated with reference to drawings. The embodiments are not limited to those described below.
(First embodiment)
A methane fermentation tank according to this embodiment will be described with reference to FIGS. Here, FIG. 1 is a schematic explanatory view of a methane fermentation tank, FIG. 2 is a schematic plan view of the methane fermentation tank of FIG. 1, and FIG. It is explanatory drawing of the fixing tool of a cover sheet.

図１中の符号１１は、コンクリート製の仕切り壁１２により２つに仕切られた約１００ｍ×１００ｍの矩形状の貯水池を示す。貯水池１１は、四方に傾斜部１１ａと土手部１１ｂを有している。仕切り壁１２は、基礎１３により貯水池１１の底部に固定されている。仕切り壁１１の両側には、貯水池１１中の有機性廃水１４を攪拌するための攪拌装置１５が夫々複数取り付けられている。貯水池１１の底部、傾斜部１１ａ及び仕切り壁１２には、ＨＤＰＥ製の底部用カバーシート１６が敷設されている。貯水池１１の上部は、比重０．９４のガス不透過性のＨＤＰＥ製天幕用カバーシート１７により覆われている。   Reference numeral 11 in FIG. 1 indicates a rectangular reservoir of about 100 m × 100 m that is divided into two by a concrete partition wall 12. The reservoir 11 has an inclined part 11a and a bank part 11b in four directions. The partition wall 12 is fixed to the bottom of the reservoir 11 by a foundation 13. A plurality of stirring devices 15 for stirring the organic waste water 14 in the reservoir 11 are attached to both sides of the partition wall 11. An HDPE bottom cover sheet 16 is laid on the bottom of the reservoir 11, the inclined portion 11 a, and the partition wall 12. The upper portion of the reservoir 11 is covered with a gas-impermeable HDPE awning cover sheet 17 having a specific gravity of 0.94.

貯水池１１の土手部１１ｂには、コンクリート枠１８が敷設されている。このコンクリート枠１８及び前記仕切り壁１２の上部には、図３に示すようなＨＤＰＥ製の固定具１９が埋め込まれている。この固定具１９のうち、ラインＬよりも下側の部分がコンクリート枠１８等に埋め込まれ、その他の部分は露出した状態にある。底部用カバーシート１６及び天幕用カバーシート１７の端部は、前記固定具１９に溶着等により固定されている。天幕用カバーシート１７の内側で貯水池１１内の有機性廃水１４の上方には、有機性廃水１４で発生したメタンガスを回収するガス回収配管２０が配置されている。このガス回収配管２０の下部側には複数の微細孔が穿設され、図示しない開閉バルブ、ファン、メタンガス回収部とともにガス回収装置が構成されている。   A concrete frame 18 is laid on the bank portion 11 b of the reservoir 11. An HDPE fixture 19 as shown in FIG. 3 is embedded in the upper part of the concrete frame 18 and the partition wall 12. Of the fixture 19, a portion below the line L is embedded in the concrete frame 18 and the other portions are exposed. The ends of the bottom cover sheet 16 and the awning cover sheet 17 are fixed to the fixture 19 by welding or the like. Inside the awning cover sheet 17 and above the organic waste water 14 in the reservoir 11, a gas recovery pipe 20 for recovering methane gas generated in the organic waste water 14 is disposed. A plurality of fine holes are formed on the lower side of the gas recovery pipe 20, and a gas recovery device is configured together with an opening / closing valve, a fan, and a methane gas recovery unit (not shown).

前記コンクリート枠１８上の所定の位置には、２本のガイドレール２１，２２が略平行に敷設されている。このガイドレール２１，２２には、夫々天幕用カバーシート１７の端部を把持して、ガイドレール２１，２２を矢印Ａの方向に移動させるための把持具２３が搭載されている。なお、図中の符号２４ａ，２４ｂはカバーシートが巻かれたロールを示す。カバーシートは、ロール２４ａ，２４ｂから矢印Ｂの方向に送り出された後、適宜な長さで隣接する端部が溶着され、切断されて使用される。   Two guide rails 21 and 22 are laid substantially parallel at a predetermined position on the concrete frame 18. The guide rails 21 and 22 are each mounted with a gripping tool 23 for gripping the end portion of the awning cover sheet 17 and moving the guide rails 21 and 22 in the direction of arrow A. In addition, the code | symbol 24a, 24b in a figure shows the roll by which the cover sheet was wound. The cover sheet is sent out in the direction of arrow B from the rolls 24a and 24b, and then the adjacent end portions are welded and cut at an appropriate length and used.

次に、図１のメタン発酵槽における天幕用カバーシートの施工方法について、図２及び図５（Ａ）〜（Ｄ）を参照して説明する。但し、図１〜図３と同部材は同符号を付して説明する。なお、便宜上、仕切り壁の片側の貯水池に天幕カバーシートを施工する場合について説明する。   Next, the construction method of the awning cover sheet in the methane fermentation tank of FIG. 1 will be described with reference to FIGS. 2 and 5A to 5D. However, the same members as those in FIGS. For convenience, a case where a tent cover sheet is installed in a reservoir on one side of the partition wall will be described.

まず、図５（Ａ）の状態で、貯水池１１の土手部１１ｂの近くに図２のようなロール２４ａ，２４ｂを準備する。次に、図２の矢印Ｂの方向にカバーシートを送り出した後、適宜な長さで隣接端部同士を溶着、切断し、これを繰り返して１枚の矩形状の底部用カバーシート１６を準備する。次いで、底部用カバーシート１６の一端側を、貯水池１１の土手部１１ｂから図２の矢印Ａ方向に送って仕切り壁１２の上部まで延出させる。この後、底部用カバーシート１６の一端側を仕切り壁１２の上部の埋め込まれた固定具１９に溶着するとともに、底部用カバーシート１６の他端側を土手部１１ｂのコンクリート枠１８に埋め込まれた固定具１９に溶着する（図５（Ｂ））。   First, rolls 24a and 24b as shown in FIG. 2 are prepared near the bank portion 11b of the reservoir 11 in the state of FIG. Next, after feeding the cover sheet in the direction of arrow B in FIG. 2, adjacent end portions are welded and cut at an appropriate length, and this is repeated to prepare one rectangular bottom cover sheet 16 To do. Next, one end side of the bottom cover sheet 16 is sent from the bank portion 11 b of the reservoir 11 in the direction of arrow A in FIG. 2 and extended to the top of the partition wall 12. Thereafter, one end side of the bottom cover sheet 16 is welded to the fixture 19 embedded in the upper part of the partition wall 12, and the other end side of the bottom cover sheet 16 is embedded in the concrete frame 18 of the bank portion 11b. It welds to the fixture 19 (FIG.5 (B)).

次に、攪拌装置設定箇所に対応する底部用カバーシート１６を切り開き、この部分に攪拌装置１５を設置する。また、貯水池１１の上方部に位置する傾斜部１１ａにガス回収配管２０を設置する。次いで、図２で示したロール２４ａ，２４ｂを用いて、底部用カバーシート１６と同様に、１枚の大きな矩形状（１００ｍ×５０ｍより一回り大きい形状）の天幕用カバーシート１７を作成し、この天幕用カバーシート１７の周囲に複数本のロープ（図示せず）を数ｍおきに取り付けた後、貯水池１１の近くに準備する。この後、底部用カバーシート１６で覆われた貯水池１１に有機性廃水１４を注水し（図５（Ｃ））、水位が攪拌装置１５よりも高くなるまで注水を続ける。   Next, the bottom cover sheet 16 corresponding to the setting position of the stirring device is cut open, and the stirring device 15 is installed in this portion. In addition, a gas recovery pipe 20 is installed on the inclined portion 11 a located above the reservoir 11. Next, using the rolls 24a and 24b shown in FIG. 2, similarly to the bottom cover sheet 16, one large rectangular shape (a shape slightly larger than 100 m × 50 m) of the awning cover sheet 17 is created. A plurality of ropes (not shown) are attached around the tent cover sheet 17 every several meters, and then prepared near the reservoir 11. Thereafter, the organic waste water 14 is injected into the reservoir 11 covered with the bottom cover sheet 16 (FIG. 5C), and the water injection is continued until the water level becomes higher than the stirring device 15.

次に、天幕用カバーシート１７の端部をガイドレール２１，２２の把持具２３に取付ける。つづいて、天幕用カバーシート１７の端部をロープで図２の矢印Ａ方向に引きながら、把持具２３をガイドレール２１，２２に沿って天幕用カバーシート１７の一端側を仕切り壁１２上の固定具１９まで移動させ、その一端側を固定具１９に溶着により固定する。この際、天幕用カバーシート１７の残りの三方に取り付けたロープを適宜引きながら天幕用カバーシート１７の三方の端部をコンクリートブロック１８に敷設された固定具１８に溶着により固定し、余剰部分は切断して天幕用カバーシート１７を施工する。なお、天幕用カバーシート１７は注水とともに浮上するので、ロープを引く力は貯水池１１に注水されていない場合と比べてはるかに小さな力でよい。また、有機性廃水１４で発生するメタンガスにより天幕用カバーシート１７は図５（Ｄ）のように膨らむ。   Next, the end of the awning cover sheet 17 is attached to the gripping tool 23 of the guide rails 21 and 22. Next, while pulling the end portion of the awning cover sheet 17 in the direction of arrow A in FIG. 2 with a rope, the gripping tool 23 is placed on the partition wall 12 at one end side of the awning cover sheet 17 along the guide rails 21 and 22. It moves to the fixture 19, and the one end side is fixed to the fixture 19 by welding. At this time, while pulling the rope attached to the remaining three sides of the awning cover sheet 17 as appropriate, the three ends of the awning cover sheet 17 are fixed to the fixture 18 laid on the concrete block 18 by welding, and the surplus portion is Cut and install the awning cover sheet 17. Since the awning cover sheet 17 floats with water injection, the force for pulling the rope may be much smaller than that when the water is not injected into the reservoir 11. Further, the awning cover sheet 17 is expanded by methane gas generated in the organic waste water 14 as shown in FIG.

第１の実施形態に係るメタン発酵槽によれば、以下に述べる効果を有する。
（１）傾斜部１１ａと土手部１１ｂが形成された貯水池１１と、仕切り壁１２と、攪拌装置１５と、底部用カバーシート１６と、天幕用カバーシート１７と、固定具１９と、ガス回収装置等を備えた構成により、簡単な構造で廃水の収容とメタンガスの回収が可能な密閉型のメタン発酵槽が得られる。 The methane fermentation tank according to the first embodiment has the following effects.
(1) Reservoir 11 in which inclined portion 11a and bank portion 11b are formed, partition wall 12, stirring device 15, bottom cover sheet 16, awning cover sheet 17, fixing tool 19, and gas recovery device With such a configuration, a sealed methane fermenter capable of containing wastewater and collecting methane gas can be obtained with a simple structure.

（２）天幕用カバーシート１７の余剰部分は切断され、その端部は貯水池１１の土手部１１ｂ及び仕切り壁１２の固定具１９に固定されるので、天幕用カバーシート１７の弛みを従来と比べて削減することができる。
（３）貯水池１１を仕切る仕切り壁１２に配置された攪拌装置１５により、貯水池１１に収容された廃水を攪拌できるので、廃水内の沈殿物の淀みを抑制することができる。 (2) The surplus portion of the awning cover sheet 17 is cut, and the ends thereof are fixed to the bank portion 11b of the reservoir 11 and the fixture 19 of the partition wall 12. Therefore, the slack of the awning cover sheet 17 is compared with the conventional one. Can be reduced.
(3) Since the waste water accommodated in the reservoir 11 can be agitated by the agitating device 15 disposed on the partition wall 12 that partitions the reservoir 11, the stagnation of the precipitate in the waste water can be suppressed.

（４）貯水池１１に有機性廃水を注水していくと、天幕用カバーシート１７の比重が０．９４なので、天幕用カバーシート１７全体が浮上する。従って、天幕用カバーシート１７が数トンを超える場合でも、水面に浮いた状態では天幕用カバーシート１７の周囲に取り付けたロープを引くことにより、天幕用カバーシート１７の弛みを取りながら敷設することができる。従って、天幕用カバーシート１７の施工の工期を短縮できるとともに、コストを低減できる。   (4) When organic waste water is poured into the reservoir 11, the specific gravity of the awning cover sheet 17 is 0.94, so that the entire awning cover sheet 17 rises. Therefore, even when the awning cover sheet 17 exceeds several tons, the awning cover sheet 17 is laid while removing the slack of the awning cover sheet 17 by pulling a rope attached around the awning cover sheet 17 in a state of floating on the water surface. Can do. Therefore, the construction period of the awning cover sheet 17 can be shortened and the cost can be reduced.

なお、第１の実施形態では底部用カバーシートを仕切り壁の上部まで延出して固定した場合について述べたが、これに限らず、貯水池の少なくとも底部及び傾斜部を覆っていればよい。   In addition, although 1st Embodiment described the case where the cover sheet for bottom parts was extended and fixed to the upper part of a partition wall, it should just cover at least the bottom part and inclination part of a reservoir not only in this.

（第２の実施形態）
本実施形態に係るメタン発酵槽について図４を参照して説明する。但し、図１〜図３と同部材は同符号を付して説明を省略する。
第２の実施形態のメタン発酵槽は、貯水池１１の対向する傾斜部１１ａにコンクリート製のブロック３１，３２を配置し、これらのブロック３１，３２の内側に複数の攪拌装置１５を夫々配置したことを特徴とする。
第２の実施形態に係るメタン発酵槽によれば、第１の実施形態のメタン発酵槽と同様な効果が得られる。 (Second Embodiment)
A methane fermentation tank according to this embodiment will be described with reference to FIG. However, the same members as those in FIGS.
In the methane fermenter of the second embodiment, concrete blocks 31 and 32 are arranged on the inclined portions 11 a facing the reservoir 11, and a plurality of stirring devices 15 are arranged inside these blocks 31 and 32, respectively. It is characterized by.
According to the methane fermenter which concerns on 2nd Embodiment, the effect similar to the methane fermenter of 1st Embodiment is acquired.

本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１１…貯水池、１２…仕切り壁、１４…有機性廃水、１５…攪拌装置、１６…底部用カバーシート、１７…天幕用カバーシート、１８…コンクリート枠、１９…固定具、２０…ガス回収配管、２１，２２…ガイドレール、２３…把持具、２５ａ，２４ｂ…ロール、３１，３２…コンクリート製のブロック。   DESCRIPTION OF SYMBOLS 11 ... Reservoir, 12 ... Partition wall, 14 ... Organic waste water, 15 ... Stirrer, 16 ... Cover sheet for bottom part, 17 ... Cover sheet for awning, 18 ... Concrete frame, 19 ... Fixture, 20 ... Gas recovery piping, 21, 22 ... guide rails, 23 ... gripping tools, 25a, 24b ... rolls, 31, 32 ... concrete blocks.

Claims (3)

嫌気性有機物を含む廃水を収容するメタン発酵槽であり、
前記廃水を収容する，内側周囲に傾斜部が形成された貯水池と、この貯水池を複数に仕切るコンクリート製の仕切り壁と、この仕切り壁の両側に夫々配置された，貯水池中の廃水を攪拌する攪拌装置と、前記貯水池の底部及び傾斜部と前記仕切り壁に配置された底部用カバーシートと、廃水で発生するメタンガスを内側に貯蔵するガス不透過性の天幕用カバーシートと、前記貯水池の土手部に環状に配置された，前記天幕用カバーシートの端部を固定するための固定具と、前記天幕用カバーシートの内側に配置されたメタンガス回収用の配管とを具備することを特徴とするメタン発酵槽。 It is a methane fermentation tank that contains wastewater containing anaerobic organic matter,
Reservoir for storing the waste water, the reservoir having an inclined portion around the inside, a concrete partition wall for partitioning the reservoir, and agitation for stirring the waste water in the reservoir respectively disposed on both sides of the partition wall A cover sheet for a bottom portion disposed on a bottom and an inclined portion of the reservoir, the partition wall, a gas impervious tent cover sheet for storing methane gas generated in waste water, and a bank portion of the reservoir And a methane gas recovery pipe disposed inside the awning cover sheet, and a fixing tool for fixing an end of the awning cover sheet disposed in an annular shape. Fermenter. 嫌気性有機物を含む廃水を収容するメタン発酵槽であり、
前記廃水を収容する，内側周囲に傾斜部が形成された貯水池と、この貯水池の傾斜部に配置されたコンクリート製のブロックと、このブロックに配置された，貯水池中の廃水を攪拌する攪拌装置と、前記貯水池の底部及び傾斜部と前記ブロックに配置された底部用カバーシートと、廃水で発生するメタンガスを内側に貯蔵するガス不透過性の天幕用カバーシートと、前記貯水池の土手部に環状に配置された，前記天幕用カバーシートの端部を固定するための固定具と、前記天幕用カバーシートの内側に配置されたメタンガス回収用の配管とを具備することを特徴とするメタン発酵槽。 It is a methane fermentation tank that contains wastewater containing anaerobic organic matter,
A reservoir for accommodating the waste water, having an inclined portion formed on the inner periphery, a concrete block disposed on the inclined portion of the reservoir, and a stirring device disposed on the block for stirring the waste water in the reservoir. A bottom cover sheet disposed on the bottom and slope of the reservoir, and a bottom cover sheet disposed on the block; a gas impervious tent cover sheet for storing methane gas generated in the waste water; and an annular shape on the bank of the reservoir A methane fermentation tank comprising: a fixture for fixing an end portion of the awning cover sheet, and a methane gas recovery pipe arranged inside the awning cover sheet. 請求項１または請求項２記載のメタン発酵槽に使用される天幕用カバーシートを施工する方法であり、
周囲に夫々複数のロープを取り付けた天幕用カバーシートを貯水池上にセットし、さらに貯水池に水を収容した後、ロープを引いて天幕用カバーシートを展張させ、天幕用カバーシートの端部を固定具に固定することを特徴するカバーシートの施工方法。 It is a method of constructing a awning cover sheet used in the methane fermentation tank according to claim 1 or claim 2,
Set a tent cover sheet with multiple ropes around it and place it on the reservoir. After storing water in the reservoir, pull the rope to extend the tent cover sheet and fix the end of the tent cover sheet. Cover sheet construction method characterized by fixing to a tool.
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