JP6503253B2 - 嫌気発酵槽の撹拌運転方法 - Google Patents
嫌気発酵槽の撹拌運転方法 Download PDFInfo
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- JP6503253B2 JP6503253B2 JP2015148942A JP2015148942A JP6503253B2 JP 6503253 B2 JP6503253 B2 JP 6503253B2 JP 2015148942 A JP2015148942 A JP 2015148942A JP 2015148942 A JP2015148942 A JP 2015148942A JP 6503253 B2 JP6503253 B2 JP 6503253B2
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- anaerobic fermentation
- stirring
- fermentation tank
- stirring operation
- anaerobic
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- 238000003756 stirring Methods 0.000 title claims description 135
- 238000000855 fermentation Methods 0.000 title claims description 118
- 238000000034 method Methods 0.000 title claims description 35
- 238000009775 high-speed stirring Methods 0.000 claims description 42
- 229910003480 inorganic solid Inorganic materials 0.000 claims description 30
- 239000010815 organic waste Substances 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 16
- 238000004062 sedimentation Methods 0.000 claims description 13
- 230000004151 fermentation Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 239000010802 sludge Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 8
- 230000029087 digestion Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
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- 238000010992 reflux Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
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- LAOROLNDGSJOEB-UHFFFAOYSA-N 3-(2-chlorophenothiazin-10-yl)-n,n-dimethylpropan-1-amine;4-(dimethylamino)-1,5-dimethyl-2-phenylpyrazol-3-one;n-(4-ethoxyphenyl)acetamide;1,3,7-trimethylpurine-2,6-dione Chemical compound CCOC1=CC=C(NC(C)=O)C=C1.CN1C(=O)N(C)C(=O)C2=C1N=CN2C.O=C1C(N(C)C)=C(C)N(C)N1C1=CC=CC=C1.C1=C(Cl)C=C2N(CCCN(C)C)C3=CC=CC=C3SC2=C1 LAOROLNDGSJOEB-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
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- 241000238633 Odonata Species 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
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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
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Description
[試験装置]
図3に示されている、上部に撹拌翼2、下部にバッフル3を備え、容積10Lの嫌気発酵槽を用いた。
初沈汚泥に焼却灰を添加し、TS(蒸発残留物)濃度1.3〜1.4%、焼却灰濃度5000mg/Lに調製された嫌気発酵処理液を、嫌気発酵槽に投入し、HRT(水理学的滞留時間)を5日とし、撹拌翼2の回転数を30,40,50,60,70rpmと変えた5水準の運転条件について3時間撹拌した後、図3のP1〜P4の4か所からサンプリングされたサンプリング液のTS濃度を調べた。この結果を図10に示す。
試験1で用いた装置、試験1と同じようにして調製した嫌気発酵処理液を用いて、馴らし運転を41日間行った後に、運転方法1で14日間、運転方法2で7日間運転しつつ、4か所のサンプリングポイントP1〜P4において適宜サンプリングし、嫌気発酵処理液のTS値の推移について調査した。
1a 天井
1b 内底
1c 内側壁
2 撹拌翼
3,3a,3b,3c バッフル
4 担体ユニット
4a フレーム
4b,4b1,4b2 担体
4c 腕部
4d 外周面
4e 脚部
4f 下面
4g 上面
5 有機性廃棄物の投入配管
6 嫌気発酵処理液の引抜配管
7 消化ガス排出管
8 天板
10 水流の合流点
11,12,13 流路
100,200 嫌気発酵槽
F0,F1,F2,F3,F4 水流
G 消化ガス
P1,P2,P3,P4 サンプリングポイント
W 嫌気発酵処理液
W1 嫌気発酵処理液の液面
Claims (5)
- 有機性廃棄物処理設備における、無機性固形物と有機性固形物とを含む有機性廃棄物を嫌気発酵処理する嫌気発酵槽の撹拌運転方法において、
前記嫌気発酵槽の下部及び上部の何れか一方に設けられた水平方向に吐出流を形成する撹拌翼と、前記嫌気発酵槽の下部及び上部の何れか他方に放射状に設けられた複数のバッフルとを有する撹拌装置を用い、
前記有機性固形物の沈降を防ぐことができるが、前記無機性固形物の沈降は阻止できない回転速度で前記撹拌翼を回転させながら、前記嫌気発酵槽における嫌気発酵を行う低速撹拌運転と、
前記低速撹拌運転時に沈降した前記無機性固形物を再浮遊させることができる回転速度で前記撹拌翼を回転させる高速撹拌運転とを、交互に行なうことを特徴とする嫌気発酵槽の撹拌運転方法。 - 前記嫌気発酵槽への前記有機性廃棄物の投入と、前記嫌気発酵槽での嫌気発酵処理液の排出とを間欠的に行う方法であって、前記有機性廃棄物の投入後に前記高速撹拌運転を行い、前記高速撹拌運転後に前記嫌気発酵処理液の排出を行う請求項1記載の嫌気発酵槽の撹拌運転方法。
- 定期的に前記撹拌翼を逆回転させて撹拌する請求項1又は2記載の嫌気発酵槽の撹拌運転方法。
- 前記高速撹拌運転時に前記撹拌翼を逆回転させて撹拌する請求項1〜3のいずれか1つに記載の嫌気発酵槽の撹拌運転方法。
- 前記撹拌装置は、前記嫌気発酵槽の上部に設けられた水平方向に吐出流を形成する撹拌翼と、前記嫌気発酵槽の下部に放射状に設けられた複数のバッフルとを有する請求項1〜3のいずれか1つに記載の嫌気発酵槽の撹拌運転方法。
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JP6503253B2 true JP6503253B2 (ja) | 2019-04-17 |
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Families Citing this family (2)
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JP6733928B1 (ja) * | 2019-12-11 | 2020-08-05 | 鹿島建設株式会社 | 消化槽 |
JP7219831B2 (ja) | 2021-03-01 | 2023-02-08 | プライミクス株式会社 | 攪拌装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63315196A (ja) * | 1987-06-16 | 1988-12-22 | Kajima Corp | 嫌気性バイオリアクタ− |
DE4120808A1 (de) * | 1991-06-24 | 1993-01-14 | Recycling Energie Abfall | Aufbereitung von abfaellen fuer die anaerobe vergaerung biogen-organischer bestandteile des muells, insbesondere von biomuell, nassmuell, restmuell und gewerbeabfaellen |
JP2005034813A (ja) * | 2003-07-18 | 2005-02-10 | Nagasaki Ryoden Tecnica Kk | 生ごみ処理装置 |
JP2008194602A (ja) * | 2007-02-13 | 2008-08-28 | Fuji Electric Holdings Co Ltd | 有機性廃棄物のメタン発酵処理方法及び装置 |
JP6053427B2 (ja) * | 2012-09-26 | 2016-12-27 | 大阪瓦斯株式会社 | メタン発酵装置およびその運転方法 |
JP5298251B1 (ja) * | 2013-02-20 | 2013-09-25 | 株式会社神鋼環境ソリューション | メタン発酵槽内の堆積物の堆積状態を推定する方法、メタン発酵槽内の堆積物の除去方法及びメタン発酵装置 |
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