Delaying Effect of Extracellular Polymer Substances on Fluid Mud Consolidation and Application for Nautical Depth
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 144, Issue 3
Abstract
Microorganisms have been used to delay fluid mud consolidation and to keep fluid mud navigable. However, bacteria and extracellular polymer substances (EPSs) that delay sediment consolidation have not been studied widely, and it has taken many years to make inorganic chemoautotroph bacteria and EPSs effective. To understand the effect of EPSs on consolidation and to find new methods of applying EPSs at nautical depths, a strain of bacteria, Burkholderia vietnamiensis, was recently isolated and screened from sediment; it was cultured to secrete EPSs to be added directly to fluid mud in a series of consolidation experiments. The experimental results showed that the EPS consisting of polysaccharides as the main component can greatly reduce sediment settling and consolidation velocity. Also, when the EPS content was relatively high, the fluid mud consolidated at a slower rate. A self-weight consolidation in the settling regime was best predicted by an exponential equation, and a permeability regime was best predicted by a logarithmic equation. The equilibrium density of mud in the effective stress regime decreased exponentially with increasing EPS content. The application time of the nautical depth might be delayed greatly by adding 0.68 g/L EPS directly into the Cangnan Power Plant Harbor, Zhejiang Province, China. The new concept of direct EPS addition into fluid mud might be a solution to the problem of slow growth of inorganic chemoautotroph bacteria and EPSs, and it might be helpful to promote the application of EPSs at nautical depths in new harbors.
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Acknowledgments
The research was financed by the TIWTE Scientific research innovation funds (TKS160201). The authors are particularly thankful to Sun Baojiang, who took part in the work of bacteria isolation and cultivation.
References
Akkache, S., Seyssiecq, I., and Roche, N. (2013). “Effect of exo-polysaccharide concentration in the rheological properties and settling ability of activated sludge.” Environ. Technol., 34(22), 2995–3003.
Badireddy, A. R., Chellam, S., Gassman, P. L., Engelhard, M. H., Lea, A. S, and Rosso, K. M. (2010). “Role of extracellular polymeric substances in bioflocculation of activated sludge microorganisms under glucose-controlled conditions.” Water Res., 44(15), 4505–4516.
Bradford, M. M. (2015). “A rapid and sensitive method for the quantitation of microgram quantities of protein utilizing the principle of protein-dye binding.” Anal. Biochem., 72, 248–254.
Camenen, B., and van Bang, D. P. (2011). “Modelling the settling of suspended sediments for concentrations close to the gelling concentration.” Cont. Shelf Res., 31(S10), 106–116.
Chauchat, J., Guillou, S., van Bang, D. P., and Nguyen, K. D. (2013). “Modelling sedimentation-consolidation in the framework of a one-dimensional two-phase flow model.” J. Hydraul. Res., 51(3), 293–305.
Dankers, P. J. T., and Winterwerp, J. C. (2007). “Hindered settling of mud flocs: Theory and validation.” Cont. Shelf Res., 27(14), 1893–1907.
Delefortrie, G., Vantorre, M., Eloot, K., and Laforce, E. (2004). “Revision of the nautical bottom concept in the Harbour of Zeebrugge through ship model testing and manoeuvring simulation.” Proc., Int. Marine Simulator Forum, 31st Annual General Meeting, International Marine Simulator Forum and Flanders Hydraulics, Antwerp, Belgium.
DuBois, M., Gilles, K. A., Hamilton, J. K., Rebers, P. A, and Smith, F. (1956). “Colorimetric method for determination of sugars and related substances.” Anal. Chem., 28(3), 350–356.
Edward, L. L., Bentley, S. J., Sr., and Xu, K. (2014). “Experimental study of cohesive sediment consolidation and resuspension identifies approaches for coastal restoration: Lake Lery, Louisiana.” Geo-Mar. Lett., 34(6), 499–509.
Grasso, F., Le Hir, P., and Bassoullet, P. (2015). “Numerical modelling of mixed-sediment consolidation.” Ocean Dyn., 65(4), 607–616.
Greiser, N., and Wurpts, R. (2008). “Microbiological impact on formation and rheological properties of fluid mud.” Proc., Chinese-German Joint Symp., Hydraulic and Ocean Engineering, U. Zanke, ed., German Research Foundation, Bonn German Federal Ministry of Education and Research, Berlin Nature Science Foundation of China, Beijing National Science Council, Taipei, Taiwan, 369–371.
Han, P. P., Sun, B. J., Pang, Q. X., and Jia, S. R. (2014). “Component analysis of microbial extracellular polymeric substances influencing fluid mud anti-settlement properties by different extraction methods.” J. Pure Appl. Microbiol., 8(2), 1353–1359.
Jin, B., Wilén, B.-M., and Lant, P. (2003). “A comprehensive insight into floc characteristics and their impact on compressibility and settleability of activated sludge.” Chem. Eng. J., 95, 221–234.
Kamphuis, J., Verwilligen, J., and Meinsma, R. (2013). “Fluid mud and determining nautical depth: A case study.” Hydro Int., 17(1), 22–25.
Kirby, R. (2011). “Minimising harbour siltation—Findings of PIANC Working Group 43.” Ocean Dyn., 61, 233–244.
Kirby, R. (2013). “Managing industrialised coastal fine sediment systems.” Ocean Coastal Manage., 79(Jul), 2–9.
Kirby, R., Parker, W. R, and van Oostrum, W. H. A. (1980). “Definition of the seabed in navigation routes through mud areas.” Int. Hydr. Rev., 57(1), 107–117.
Kirby, R., Wurpts, R., and Greiser, N. (2008). “Chapter 1: Emerging concepts for managing fine cohesive sediment.” Proc., Marine Science, Sediment and Ecohydraulics, INTERCOH 2005, T. Kusuda, H. Yamanishi, J. Spearman, and J. Z. Gailani, eds., Vol. 9, Elsevier B.V., Amsterdam, Netherlands, 1–15.
Liao, B. Q., Allen, D. G., Droppo, I. G., Leppard, G. G., and Liss, S. N. (2001). “Surface properties of sludge and their role in bioflocculation and settleability.” Water Res., 33(2), 339–350.
McAnally, W. H., et al. (2007). “Management of fluid mud in estuaries, bays, and lakes. I: Present state of understanding on character and behavior.” J. Hydraul. Eng., 9–22.
McSwain, B. S., Irvine, R. L., Hausner, M, and Wilderer, P. A. (2005). “Composition and distribution of extracellular polymeric substances in aerobic flocs and granular sludge.” Appl. Environ. Microbiol., 71(2), 1051–1057.
Mehta, A. J. (2013). An introduction to hydraulics of fine sediment transport, Vol. 38, World Scientific, Singapore.
Mehta, A. J., Samsami, F., Khare, Y. P, and Sahin, C. (2014). “Fluid mud properties in nautical depth estimation.” J. Waterway, Port, Coastal, Ocean Eng., 210–222.
Merckelbach, L. M., and Kranenburg, C. (2004). “Determining effective stress and permeability equations for soft mud from simple laboratory experiments.” Géotechnique, 54(9), 581–591.
Mikkelsen, L. H., and Keiding, K. (2002). “Physico-chemical characteristics of full scale sewage sludges with implications to dewatering.” Water Res., 36(10), 2451–2462.
Pang, Q. X., Yang, S. S., Yang, H., and Han, X. J. (2010). “Research and application of the technique of nautical depth in muddy harbours.” Hydro-Sci. Eng., 3, 33–39 (in Chinese).
Pang, Q. X., Zhang, R. B., and Wen, C. P. (2015). “Research and application of nautical depth in Cannan Power Plant Harbour.” Tianjin Research Institute of Water Transport Engineering, Tianjin, China (in Chinese).
PIANC-IAPH Working Group II-30 (Permanent International Association of Navigation Congresses–International Association of Ports and Harbors Working Group II-30). (1997). Approach channels—A guide for design, PIANC, Brussels, Belgium.
Sanford, L. P. (2008). “Modeling a dynamically varying mixed sediment bed with erosion, deposition, bioturbation, consolidation, and armouring.” Comput. Geosci., 34(10), 1263–1283.
Toorman, E. A. (1996). “Sedimentation and self-weight consolidation: General unifying theory.” Géotechnique, 46(1), 103–113.
Wilén, B. M., Jin, B., and Lant, P. (2003). “The influence of key chemical constituents in activated sludge on surface and flocculating properties.” Water Res., 37(9), 2127–2139.
Zita, A., and Hermansson, M. (1994). “Effects of ionic strength on bacterial adhesion and stability of flocs in a wastewater activated sludge system.” Appl. Environ. Microbiol., 60(9), 3041–3048.
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© 2018 American Society of Civil Engineers.
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Received: Jun 27, 2017
Accepted: Oct 24, 2017
Published online: Feb 1, 2018
Published in print: May 1, 2018
Discussion open until: Jul 1, 2018
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