Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k

E. Vignaga; H. Haynes; W. T. Sloan; A. Fernandes; M. Jarvis; T. K. Beattie; V. R. Phoenix

doi:10.1201/b10999-47

Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k

E. Vignaga, H. Haynes, W. T. Sloan, A. Fernandes, M. Jarvis, T. K. Beattie, V. R. Phoenix

Civil And Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

Abstract

A monoculture of cyanobacterium (Phormidium sp.) was grown for up to 10 weeks on spherical glass beads (d₅₀ = 1.09 mm) under constant unidirectional flow conditions. Using a 0.3 m × 15m flume facility, the strength of biofilm-sediments adhesion was tested at the threshold of entrainment. High speed videographic analysis focussed on biofilm entrainment at two different scales (small = 4.5 cm × 3.4 cm; large =20cm × 20 cm) and image post processing employed the software ImageJ. Results indicated a 23-77% increase in the threshold of entrainment of biostabilized sediment, compared with that of abiotic sediment. The biofilm was sufficiently strong that tensile testing could be employed to elucidate its material properties and those of the composite of biofilm and sediment. Both exhibited elastic behaviour which could be characterized by Hooke's Law. Describing the strength of biofilm in this manner will allow modification of traditional abiotic models of sediment transport to incorporate the binding effects of an elastic biofilm.

Original language	English
Title of host publication	Environmental Hydraulics
Subtitle of host publication	Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009
Editors	Petra Amparo López Jiménez, V.S. Fuertes-Miquel, P.L. Iglesias-Rey, G. Lopez-Patino, F.J. Martinez-Solano, G. Palau-Salvador
Place of Publication	Boca Raton
Pages	183-186
Number of pages	4
DOIs	https://doi.org/10.1201/b10999-47
Publication status	Published - 2010
Event	1st International Workshop on Environmental Hydraulics, IWEH 2009 - Valencia, Spain Duration: 29 Oct 2009 → 30 Oct 2009

Conference

Conference	1st International Workshop on Environmental Hydraulics, IWEH 2009
Country/Territory	Spain
City	Valencia
Period	29/10/09 → 30/10/09

Keywords

biofilm
biostabilization
entrainment
flume
non-cohesive sediment
tensile test

Access to Document

10.1201/b10999-47

Cite this

Vignaga, E., Haynes, H., Sloan, W. T., Fernandes, A., Jarvis, M., Beattie, T. K., & Phoenix, V. R. (2010). Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k. In P. A. L. Jiménez, V. S. Fuertes-Miquel, P. L. Iglesias-Rey, G. Lopez-Patino, F. J. Martinez-Solano, & G. Palau-Salvador (Eds.), Environmental Hydraulics: Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009 (pp. 183-186). https://doi.org/10.1201/b10999-47

Vignaga, E. ; Haynes, H. ; Sloan, W. T. et al. / Lab-cultured biofilm stabilization of non-cohesive sediments : Quantifying the elastic constant, k. Environmental Hydraulics: Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009. editor / Petra Amparo López Jiménez ; V.S. Fuertes-Miquel ; P.L. Iglesias-Rey ; G. Lopez-Patino ; F.J. Martinez-Solano ; G. Palau-Salvador. Boca Raton, 2010. pp. 183-186

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title = "Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k",

abstract = "A monoculture of cyanobacterium (Phormidium sp.) was grown for up to 10 weeks on spherical glass beads (d50 = 1.09 mm) under constant unidirectional flow conditions. Using a 0.3 m × 15m flume facility, the strength of biofilm-sediments adhesion was tested at the threshold of entrainment. High speed videographic analysis focussed on biofilm entrainment at two different scales (small = 4.5 cm × 3.4 cm; large =20cm × 20 cm) and image post processing employed the software ImageJ. Results indicated a 23-77% increase in the threshold of entrainment of biostabilized sediment, compared with that of abiotic sediment. The biofilm was sufficiently strong that tensile testing could be employed to elucidate its material properties and those of the composite of biofilm and sediment. Both exhibited elastic behaviour which could be characterized by Hooke's Law. Describing the strength of biofilm in this manner will allow modification of traditional abiotic models of sediment transport to incorporate the binding effects of an elastic biofilm.",

keywords = "biofilm, biostabilization, entrainment, flume, non-cohesive sediment, tensile test",

author = "E. Vignaga and H. Haynes and Sloan, {W. T.} and A. Fernandes and M. Jarvis and Beattie, {T. K.} and Phoenix, {V. R.}",

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Vignaga, E, Haynes, H, Sloan, WT, Fernandes, A, Jarvis, M, Beattie, TK & Phoenix, VR 2010, Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k. in PAL Jiménez, VS Fuertes-Miquel, PL Iglesias-Rey, G Lopez-Patino, FJ Martinez-Solano & G Palau-Salvador (eds), Environmental Hydraulics: Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009. Boca Raton, pp. 183-186, 1st International Workshop on Environmental Hydraulics, IWEH 2009, Valencia, Spain, 29/10/09. https://doi.org/10.1201/b10999-47

Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k. / Vignaga, E.; Haynes, H.; Sloan, W. T. et al.
Environmental Hydraulics: Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009. ed. / Petra Amparo López Jiménez; V.S. Fuertes-Miquel; P.L. Iglesias-Rey; G. Lopez-Patino; F.J. Martinez-Solano; G. Palau-Salvador. Boca Raton, 2010. p. 183-186.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

TY - GEN

T1 - Lab-cultured biofilm stabilization of non-cohesive sediments

T2 - 1st International Workshop on Environmental Hydraulics, IWEH 2009

AU - Vignaga, E.

AU - Haynes, H.

AU - Sloan, W. T.

AU - Fernandes, A.

AU - Jarvis, M.

AU - Beattie, T. K.

AU - Phoenix, V. R.

PY - 2010

Y1 - 2010

N2 - A monoculture of cyanobacterium (Phormidium sp.) was grown for up to 10 weeks on spherical glass beads (d50 = 1.09 mm) under constant unidirectional flow conditions. Using a 0.3 m × 15m flume facility, the strength of biofilm-sediments adhesion was tested at the threshold of entrainment. High speed videographic analysis focussed on biofilm entrainment at two different scales (small = 4.5 cm × 3.4 cm; large =20cm × 20 cm) and image post processing employed the software ImageJ. Results indicated a 23-77% increase in the threshold of entrainment of biostabilized sediment, compared with that of abiotic sediment. The biofilm was sufficiently strong that tensile testing could be employed to elucidate its material properties and those of the composite of biofilm and sediment. Both exhibited elastic behaviour which could be characterized by Hooke's Law. Describing the strength of biofilm in this manner will allow modification of traditional abiotic models of sediment transport to incorporate the binding effects of an elastic biofilm.

AB - A monoculture of cyanobacterium (Phormidium sp.) was grown for up to 10 weeks on spherical glass beads (d50 = 1.09 mm) under constant unidirectional flow conditions. Using a 0.3 m × 15m flume facility, the strength of biofilm-sediments adhesion was tested at the threshold of entrainment. High speed videographic analysis focussed on biofilm entrainment at two different scales (small = 4.5 cm × 3.4 cm; large =20cm × 20 cm) and image post processing employed the software ImageJ. Results indicated a 23-77% increase in the threshold of entrainment of biostabilized sediment, compared with that of abiotic sediment. The biofilm was sufficiently strong that tensile testing could be employed to elucidate its material properties and those of the composite of biofilm and sediment. Both exhibited elastic behaviour which could be characterized by Hooke's Law. Describing the strength of biofilm in this manner will allow modification of traditional abiotic models of sediment transport to incorporate the binding effects of an elastic biofilm.

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KW - biostabilization

KW - entrainment

KW - flume

KW - non-cohesive sediment

KW - tensile test

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DO - 10.1201/b10999-47

M3 - Conference contribution book

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Vignaga E, Haynes H, Sloan WT, Fernandes A, Jarvis M, Beattie TK et al. Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k. In Jiménez PAL, Fuertes-Miquel VS, Iglesias-Rey PL, Lopez-Patino G, Martinez-Solano FJ, Palau-Salvador G, editors, Environmental Hydraulics: Theoretical, Experimental and Computational Solutions - Proceedings of the International Workshop on Environmental Hydraulics, IWEH 2009. Boca Raton. 2010. p. 183-186 doi: 10.1201/b10999-47

Lab-cultured biofilm stabilization of non-cohesive sediments: Quantifying the elastic constant, k

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