Process control factors for continuous microbial perchlorate reduction in the presence of zero-valent iron
Process control factors for continuous microbial perchlorate reduction in the presence of zero-valent iron作者机构：Department of Civil Engineering Auburn University Auburn AL 36849 USA Korea Environment Institute Seoul 122-706 Republic of Korea Department of Civil and Environmental Engineering University of Delaware Newark DE 19716 USA Department of Civil and Environmental Engineering University of South Carolina Columbia SC 29208 USA Department of Environmental Science and Engineering Ewha Womans University Seoul 120-750 Korea
出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)
年 卷 期：2014年第8卷第3期
页 面：386-393页
核心收录：
学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0806[工学-冶金工程] 080601[工学-冶金物理化学]
主 题：perchlorate zero-valent iron (ZVI) microbial reduction hydrogen
摘 要：Process control parameters influencing microbial perchlorate reduction via a flow-through zero-valent iron （ZVI） column reactor were investigated in order to optimize perchlorate removal from water. Mixed perchlorate reducers were obtained from a wastewater treatment plant and inoculated into the reactor without further acclimation. Examined parameters included hydraulic residence time （HRT）, pH, nutrients requirement, and perchlorate reduction kinetics. The minimum HRT for the system was concluded to be 8 hr. The removal efficiency of 10 mg. L-1 influent perchlorate concentration was reduced by 20%-80% without control to the neutral pH （HRT = 8 hr）. Therefore pH was determined to be an important parameter for microbial perchlorate reduction. Furthermore, a viable alternative to pH buffer was discussed. The microbial perchlorate reduction followed the first order kinetics, with a rate constant （K） of 0.761 hr-1. The results from this study will contribute to the implementation of a safe, cost effective, and efficient system for perchlorate reduction to below regulated levels.
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