Optical system
Gravimetrical system
Overflow system
Scale
CCD cameras
p
Presparging
e
column
Lead beads
Plexiglas
Gas supply
Air
Porous medium
tank
Q g
183
Reactive (Oxygen) Gas Barrier and Zone Technologies
FIGURE 10.3
Test devices and sites for DGI studies. Upper left: gravimetric-optical system. (Geistlinger et
al. 2006: Direct Gas Injection into glass beads: Transition from incoherent to coherent gas flow
pattern. Water Res. Research, 42, paper W07403, 12 p.) Upper right: pressurized rotatable column
with gravimetric balancing system, bottom image: field-scale test site BIOXWAND.
pore to local scale phenomena (10 −5 –10 −1 m). Uniform sand fractions and glass
beads were used as sediments and effective mechanical stress is induced by
hydraulic pressure being applied to a rear-side membrane and an overburden or gravimetric load (leaden spheres). A gravimetric phase balancing system was installed for saturation measurements.
A bench to pilot scale research test site for gas-based remediation techniques
was installed at the Dresden Groundwater Centre (Figure 10.3). Test columns and tanks (0.3 m–3.0 m in diameter) were used to evaluate the effective parameters for gas injection, storage, and dissolution for upscaling to
field applications (Weber, 2007). The test devices operated under near-to-field
conditions. 1D and 3D total stress and system pressures of 300 kPa (using
a 20 m column of water) were applied to the columns and tanks. The temperature of the system was set at 10–15°C, which are temperatures typical
Gravimetrical system
Overflow system
Scale
CCD cameras
p
Presparging
e
column
Lead beads
Plexiglas
Gas supply
Air
Porous medium
tank
Q g
183
Reactive (Oxygen) Gas Barrier and Zone Technologies
FIGURE 10.3
Test devices and sites for DGI studies. Upper left: gravimetric-optical system. (Geistlinger et
al. 2006: Direct Gas Injection into glass beads: Transition from incoherent to coherent gas flow
pattern. Water Res. Research, 42, paper W07403, 12 p.) Upper right: pressurized rotatable column
with gravimetric balancing system, bottom image: field-scale test site BIOXWAND.
pore to local scale phenomena (10 −5 –10 −1 m). Uniform sand fractions and glass
beads were used as sediments and effective mechanical stress is induced by
hydraulic pressure being applied to a rear-side membrane and an overburden or gravimetric load (leaden spheres). A gravimetric phase balancing system was installed for saturation measurements.
A bench to pilot scale research test site for gas-based remediation techniques
was installed at the Dresden Groundwater Centre (Figure 10.3). Test columns and tanks (0.3 m–3.0 m in diameter) were used to evaluate the effective parameters for gas injection, storage, and dissolution for upscaling to
field applications (Weber, 2007). The test devices operated under near-to-field
conditions. 1D and 3D total stress and system pressures of 300 kPa (using
a 20 m column of water) were applied to the columns and tanks. The temperature of the system was set at 10–15°C, which are temperatures typical