Sparge trenches

Marley, M., F. Li, E. Droste, and R. Cody. 1994. The Design of an In-situ Sparging Trench, in Proceedings of Petroleum Hydrocarbons and Organic Chemicals in Ground Water Prevention, Detection, and Restoration, NGWA, Dublin, OH, pp. 579-590. 

T0750 Stevens Institute of Technology, Trench Bio-Sparge T0751 Stevenson Palmer Engineering, Inc., PHOSter T0756 Supercritical Water Oxidation—General... 

T0750 Stevens Institute of Technology, Trench Bio-Sparge... 

A trench can be uniformly backfilled with porous gravel, thereby reducing the impacts of preferential channeling in the zone of sparging and encouraging uniform and substantial mass transfer. 

The Trench Bio-Sparge (TBS) system is an in situ technology for the treatment of groundwater contaminated with organic compounds. The system employs diversion walls to direct the contaminant plume to a subsurface trench reactor, where treatment is achieved by physical and/or biological means. The technology has been field tested at the pilot scale but is not yet commercially available. 

Figure 1. Vertical concentration profiles for DMS, chlorophyll a and DMSP in the western basin of the Cariaco Trench off Venezuela (10° 39 N, 65°30 W). DMS was determined by sparging and gas chromatography with a flame photometric detector. Particulate DMSP was determined bv base treatment of material collected on 0.22 pm filters and analysis of the DMS released free DMSP was determined as DMS released upon base treatment of sparged water samples obtained after initial DMS analysis. Chlorophyll a data from W. Cooper and R. Zika (personal communication).

Pankow, J. F., R. L. Johnson, and J. A. Cherry. 1993. Air Sparging in Gate Wells in Cutoff Wells tmd Trenches for Control of Plumes of Volatile Organic Compounds (VOCs), Ground Water, vol. 31, no. 4, pp. 654-663. 

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