Evaluation of slow release substrates for anaerobic bioremediation

被引：15
作者：
Borden, Robert C. [1 ]
Rodriguez, B. Ximena [1 ]
机构：
[1] Department of Civil, Construction, and Environmental Engineering, North Carolina State University, Raleigh, NC 27695
来源：
Bioremediation Journal | 2006年 / 10卷 / 1-2期
关键词：
Anaerobic; Fats; Reductive dechlorination; SEFA; Substrates;
D O I：
10.1080/10889860600835492
中图分类号：
学科分类号：
摘要：
A variety of food-grade organic substrates were evaluated to identify materials that could be used to support long-term anaerobic bioremediation processes in the subsurface. In this work, the rate and extent of biogas production was used as an indicator of the potential for substrate fermentation to H2 and acetate, the primary electron donors used in reductive dechlorination. The rate and extent of biogas (primarily CO 2 + CH 4) evolution varied widely between the different substrates. For many of the substrates, biogas generation declined to very low levels within 100 days of substrate addition. However, a few substrates including several vegetable oils and sucrose esters of fatty acid (SEFAs) did support biogas production for extended time periods. Column studies demonstrated that both soybean oil and a SEFA could support sulfate reduction, methanogenesis and reductive dechlorination of perchloroethene (PCE) to cis-dichloroethene (cis-DCE) for over 14 months. The slower degradation rate of the SEFAs could be used to control substrate degradation rate in the subsurface, increasing substrate lifetime and reducing the required reinjection frequency. © 2007 Taylor and Francis Group, LLC.
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页码：59 / 69
页数：10
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