Presidential Young Investigator Award-Physiological Aspects of Microbial Sulfur Transformations of Relevance to ConcreteCorrosion

总统青年研究员奖 - 与混凝土腐蚀相关的微生物硫转化的生理方面

• 批准号: 8658002
• 负责人: Robert Arnold
• 金额: $ 33.2万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8658002&HistoricalAwards=false
• 关键词: Presidential; Young; Investigator; Award; Physiological

Among the more serious problems in transport of wastewaters is the rapid corrosion of concrete interceptors in large collection systems. The progress of such corrosion is driven by the evolution of hydrogen sulfide gas followed by its reoxidation in the aerobic crown with accompanying acid production. Both steps are microbially catalyzed. Consequently, the process may be interrupted by appropriate engineering measures designed to suppress the activity of sulfate reducers or acidophilic autotrophs in the conduit's crown. Such measures will be explored within the proposed project. Candidate actions, including chemical control in the liquid phase and pH control in the crown can be economically investigated in a bench-scale laboratory program.

在废水运输中，更严重的问题之一是大型收集系统中混凝土拦截器的快速腐蚀。这种腐蚀的发展是由硫化氢气体的释放，然后在有氧树冠中的再氧化和伴随的产酸推动的。这两个步骤都是微生物催化的。因此，这一过程可能会被适当的工程措施中断，这些措施旨在抑制管道顶端的硫酸盐还原剂或嗜酸性自养细菌的活性。这些措施将在拟议的项目中进行探讨。候选的行为，包括液体中的化学控制和冠中的pH控制，可以在实验室规模的计划中进行经济的研究。