Biocorrosive Thermophilic Microbial Communities in Alaskan Worth Slope Oil Facilities
Biocorrosive Thermophilic Microbial Communities in Alaskan Worth Slope Oil Facilities
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DOI：
10.1021/es9013932
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发表时间：
2009-10-15
影响因子：
11.4
通讯作者：
Suflita, Joseph M.
中科院分区：
文献类型：
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作者：
Duncan, Kathleen E.;Gieg, Lisa M.;Suflita, Joseph M.
微生物对金属油田管道的腐蚀是一种成本高昂但人们知之甚少的现象，标准处理方法针对的是中温硫酸盐还原菌。在评估阿拉斯加北坡油田的生物腐蚀潜力时，我们发现了嗜热氢产甲烷菌、互养细菌、肽和氨基酸发酵细菌、铁还原剂、硫/硫代硫酸盐还原细菌和硫酸盐还原古细菌。这些微生物可以通过产生有机酸、二氧化碳、硫物质以及通过氢氧化和铁还原来刺激金属腐蚀，涉及的生物类型比目前目标的生物类型要多得多。在管道流体中检测到了微摩尔量的 C-1-C-4 正构烷烃的假定厌氧代谢物，这意味着这些低分子量碳氢化合物通常会被重新注入油藏以进行采油，它们会被生物降解，并且可以为生物腐蚀性微生物群落提供重要的营养来源。
Corrosion of metallic oilfield pipelines by microorganisms is a costly but poorly understood phenomenon, with standard treatment methods targeting mesophilic sulfate-reducing bacteria. In assessing biocorrosion potential at an Alaskan North Slope oil field, we identified thermophilic hydrogen-using methanogens, syntrophic bacteria, peptide- and amino acid-fermenting bacteria, iron reducers, sulfur/thiosulfate-reducing bacteria, and sulfate-reducing archaea. These microbes can stimulate metal corrosion through production of organic acids, CO2, sulfur species, and via hydrogen oxidation and iron reduction, implicating many more types of organisms than are currently targeted. Micromolar quantities of putative anaerobic metabolites of C-1-C-4 n-alkanes in pipeline fluids were detected, implying that these low molecular weight hydrocarbons, routinely reinjected into reservoirs for oil recovery purposes, are biodegraded and can provide biocorrosive microbial communities with an important source of nutrients.