Influence of Biofilms on Porous Media Hydrodynamics - Porous Media: Applications in Biological Systems and Biotechnology - page 185

9 mm

6

Air
Filter

9

Image Analyzer

SP

8

2

5

4

7 11

Influent
Sampling
Port

PP

Air

Porous Media Reactor

Nutrient
Media

E uent Sampling Port 10

3 1

Sampling
port

Steel mesh Perspex wall

Pressure
transducer

Steel
mesh

Nitrogen
(oxygen free)

P5

Aquifer material
Sampling ports
(rubber
septum
equiped)

P4

Air
filters

P3 Aquifer

material

Stainless steel
thread (swagelock)

Glass
tubes

Air
filter

P2

Steel mesh
Pressure
sensor

Glass
bottle

Ta p

Peristaltic
pump

Glass
bottle

Sampling
port

Computer

Treated Bolivar
waste water

Data logger Battery

FIGURE 5.3
Schematics of experimental setups to study biofilm formation in porous media.
Top left: Capillary flowcells used by Cunningham et al. (1991); Top right:
artificial fracture setup used by Castegnier et al. (2006); Bottom: column
setup utilized by Rinck-Pfeiffer et al. (2000). The two flowcells systems (top)
both allow for direct optical interrogation of the system. The column setup
(bottom) allows for more realistic porous media conditions but does not
permit direct optical interrogation. The fracture and column flow systems
allow for limited spatially resolved assessments of hydraulic conductivity due
to multiple piezometers or pressure transducers. See cited sources for more
detailed explanations of the experimental setups. (Top Left: Reprinted with
permission from Cunningham, A. B., Characklis, W. G., Abedeen, F., and
Crawford, D., Env. Sci. Tech., 25, 1991. c 1991, American Chemical Soci-

ety. Top Right: Reprinted from, Castegnier, F., Ross, N., Chapuis, R.P.,
Deschenes, L., and Samson, R., Water Res., 40, 2006. c

2006—with permis-
sion from Elsevier. Bottom: Reprinted from, Rinck-Pfeiffer, S., Ragusa, S.,
Sztajnbok, P., and Vandevelde, T., Water Res. , 34, 2000. c 2006—with per-

mission from Elsevier.)