Modeling of remediation with ORC™:: Transverse dispersion

被引:0
|
作者
Wilson, DJ [1 ]
Norris, RD [1 ]
机构
[1] ECKENFELDER INC, Nashville, TN 37228 USA
来源
FIRST INTERNATIONAL CONFERENCE ON REMEDIATION OF CHLORINATED AND RECALCITRANT COMPOUNDS, VOL 4: BIOREMEDIATION AND PHYTOREMEDIATION | 1998年
关键词
D O I
暂无
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Oxygen release compound (ORC (TM)) is used to provide O-2 where costs or inconvenience of other sources make ORC a competitive source of O-2 for biodegradation. One application is the aerobic biodegradation of vinyl chloride and cis-1,2-DCE downgradient of anaerobic zones of natural attenuation or zero-valent metal permeable barriers. Small transverse dispersivities dictate that ORC wells be relatively closely spaced to avoid alternating strips of groundwater containing VOC or dissolved O-2 (D.O.) far downgradient from the wells (pin-striping). A model for ORC cleanups is described which includes transverse and longitudinal dispersion of both O-2 and contaminant. Biodegradation is handled by Monod kinetics. O-2 delivery capacity of a well is limited by Henry's Law and the hydrostatic head. Mineralization is assumed. Inclusion of transverse dispersion for both O-2 and contaminant results in less pin-striping than is modeled with O-2 dispersion alone. This permits somewhat wider spacing of the ORC wells. Dependence of results on model parameters is explored.
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页码:13 / 19
页数:7
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