Stabilization of a geothermal power plant operation by repressing of sulfur bacteria in the cooling water system

通过抑制冷却水系统中的硫细菌来稳定地热发电厂的运行

• 批准号: 13555276
• 负责人: INOUE Chihiro
• 金额: $ 8.77万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555276/
• 关键词: Geothermal Power Plant; Sulfur Scale; Sulfur Oxidizing Bacteria; Hydrogen sulfide; Gene Analysis; Sulfate Reducing Bacteria; Glutaraldehyde; Cationic Surfactant; 16SrRNA遺伝子; ポリチオン酸; PCR-PFLP; 酸化速度; 物質収支; 速度論

The purpose of this study is to reduce the amount of sulfur scale formation in the cooling water system of a geothermal power plant by repressing sulfur bacteria.At Uenotai geothermal power plant, 10% of hydrogen sulfide derived from production well was oxidized to sulfuric acid, and 2% was converted to elemental sulfur. These changes were mainly occurred in the cooling tower. Many strains of sulfur oxidizing bacteria were isolated from sulfur scale sampled from the cooling tower, the condenser and pipelines. Also, some kind of bacteria was isolated from the river sludge. This river water is used for the cooling water of the power plant. The 16S ribosomal DNA analysis indicates that the sulfur oxidizing bacteria isolated from inside of the power plant are dominant in the equipments and derived from the river. Sulfate reducing bacteria were also isolated from bottoms of the cooling tower and the condenser. In these equipments, microbial sulfur oxidation and reduction occur simultaneously.To minimize the formation of sulfur scale, glutaraldehyde and cationic surfactant (G-50) were added to the cooling water of Uenotai geothermal power plant. About 25% of the scale formation was reduced for one year operation.

本研究的目的是通过抑制硫细菌来减少地热发电厂冷却水系统中硫垢的形成量。在上野泰地热发电厂，来自生产井的10%的硫化氢被氧化成硫酸， 2%转化为元素硫。这些变化主要发生在冷却塔中。从冷却塔、冷凝器和管道的硫垢样品中分离出许多菌株的硫氧化菌。此外，还从河流污泥中分离出了某种细菌。该河水用于发电厂的冷却水。 16S核糖体DNA分析表明，从电厂内部分离出的硫氧化菌在设备中占优势，且来源于河流。还从冷却塔和冷凝器的底部分离出硫酸盐还原细菌。在这些设备中，微生物硫的氧化和还原同时发生。为了最大限度地减少硫垢的形成，上野台地热发电厂的冷却水中添加了戊二醛和阳离子表面活性剂（G-50）。运行一年，规模减少约25%。

项目成果

K.Suto et al.: "Microbial reduction of Polysulfide Produced by Photooxidation of Hydrogen Sulfide"Proceedings of 2002 Annual Meeting of Mining and Materials Processing Institute of Japan. 87-88 (2002)

K.Suto 等人：“硫化氢光氧化产生的多硫化物的微生物还原”日本采矿和材料加工研究所 2002 年年会论文集。

T.Chida: "Microorganisms and Geothermal Power Plant"TOBIN. Vol.19. 12-14 (2002)

T.Chida：“微生物和地热发电厂”TOBIN。

千田 佶: "地熱発電と微生物"TOBIN. 19. 12-14 (2001)

Takashi Senda：“地热发电和微生物”TOBIN。19. 12-14 (2001)。

Yui Takahashi, et al.: "Regeneration of hydrogen sulfide using sulfate reducing bacteria for photo catalytic hydrogen generation"Proceedings of International Biohydrometallurgy Symposium, IBS2003. (CD-ROM). (2003)

Yui Takahashi 等人：“利用硫酸盐还原菌进行光催化制氢再生硫化氢”，国际生物湿法冶金研讨会论文集，IBS2003。

Y.Takahashi et al.: "Regeneration of Hydrogen Sulfide Using Sulfate Reducing Bacteria for Photo Catalytic Hydrogen Generation"Proceedings of International Biohydrometallurgy Symposium, IBS2003. (in press).

Y.Takahashi 等人：“利用硫酸盐还原菌光催化制氢再生硫化氢”国际生物湿法冶金研讨会论文集，IBS2003。