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

在废水的运输方面，比较严重的问题是 大型集水池中混凝土截水管的快速腐蚀 系统. 这种腐蚀的进展是由 硫化氢气体的析出，随后在 好氧菌冠伴随着酸的产生。 两个步骤 是由微生物催化的 因此，该过程可以是 通过适当的工程措施中断， 抑制硫酸盐还原剂或嗜酸性物质的活性 在导管的冠部有自养生物。 这些措施将 在拟议的项目中进行了探索。 候选行动， 包括液相中的化学控制和液相中的pH控制。 可以在实验室规模上对冠部进行经济研究 实验室计划

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.