NSF-CONACyT: Sulfide as the Main Electron Donor for Denitrification of Petroleum Refinery Effluents-A Novel Approach for Simultaneous Removal of S, N, and C

0115851现场本研究项目的目标是开发一种以硫化氢为主要电子供体的反硝化生物反应器，用于同时脱除炼油厂冷凝液中的碳、氮和硫。反硝化生物反应器将是两阶段生物过程的第一阶段，随后是硝化反应器，通过出水再循环提供硝酸盐。根据NSF-CONACyT的联合计划，该项目是与墨西哥石油学院(IMP)国际合作的一部分，由这笔赠款资助的科学研究将为IMP开发拟议的技术提供基础。由于该系统复杂的微生物生态环境，需要进行这方面的研究。本研究将对冷凝液进水反硝化生物反应器中的微生物群落进行表征。随后，将确定控制反应器以最大限度地去除硫化物、酚和氮的策略。研究酚类物质对自养反硝化过程的影响。这项研究的一个重要方面将是控制硫化物的氧化形成不溶的元素硫，而不是完全氧化成硫酸盐，以便物理分离重复使用。***

0115851 Field The objective of this research project is to develop a denitrification bioreactor using H2S as the main electron donor for the simultaneous removal of carbon, nitrogen and sulfur from refinery condensates. The denitrifying bioreactor will be the first stage of a two-stage biological process followed by a nitrification reactor, supplying nitrate via effluent recirculation. Under the joint NSF-CONACyT program, this project forms part of an international collaboration with the Mexican Institute of Petroleum (IMP) and the scientific research funded by this grant will provide a basis for the IMP to develop the proposed technology. This research is needed due to the complex microbial ecology of the system. This research will characterize the microbial consortium in the condensate-fed denitrifying bioreactor. Subsequently, the strategies of controlling the reactor to maximize the removal of sulfide, phenols and nitrogen will be identified. The effect of phenols on the autotrophic denitrification process will be studied. An important aspect of the research will be to control the oxidation of sulfide to form insoluble elemental sulfur, instead of complete oxidation to sulfate, so that it can be physically separated for reuse. ***