Noche Potosi

Noche Potosi
Iglesia San Bernardo

martes, 15 de enero de 2013

BIOPELICULA  (biofilm) 

La formación de la biopelícula en acueductos y alcantarillados afecta el flujo.

El crecimiento de esta placa adherida a las paredes del conducto se debe a la Biomasa con la acción de varios tipos de bacterias.

Se ha investigado al respecto , y son propuestas varias operaciones unitarias para disminuir o deprimir el crecimiento de la biopelícula.

El efecto de la modificación de la rugosidad interna de los conductos está siendo evaluado por varios investigadores, 
Dr. Andrew Barton tuvo la gentileza de enviarme una copia de su investigación :

Hydraulic Roughness of Biofouled Pipes, Biofilm Character,

and Measured Improvements from Cleaning

Andrew F. Barton, M.ASCE1; Michael R. Wallis2; Jane E. Sargison3; Alexandru Buia4; and
Gregory J. Walker5

 Abstract: The hydraulic performance of pipelines can be significantly affected by the presence of biological growth on internal surfaces.
The change in wall roughness brought about by the biofilms has been studied by the use of headloss tests, precleaning and postcleaning
of the pipelines in three Tasmanian hydroelectric schemes. Results of the headloss testing show that improvements to hydraulic efficiency
can be achieved from the cleaning of biofouling material. The data, when plotted as a Moody diagram, shows that the friction law for
conduits roughened by biological growths may not always follow a Colebrook-White type relationship, although the results are too narrow
in Reynolds number to be conclusive. It was found that bacteria made up the majority of the biofilm biomass in the pipelines studied.
Based on molecular analysis, members of the class Alphaproteobacteria were the most frequently detected followed by members of the
phylum Chloroflexi.
DOI: 10.1061/ ASCE 0733-9429 2008 134:6 852
CE Database subject headings: Hydraulic Roughness; Biofilm; Pipe flow; Water pipelines.

 GRACIAS  Dr.  BARTON,

Andrew Barton

Qualifications

BE(Env)(Hons) Deakin
MEngSc Monash
PhD Tasmania

Teaching Areas

ENCIV3030 (Water Drainage Infrastructure)
ENMIN7050 (Mine Environmental Engineering)
ENCOR2100 (Fluids and Thermofluids)
ENCIV3060 (Waste and Wastewater Infrastructure)

Research Interests

Water resource planning and multiple reservoir operations
Water sharing, entitlements and allocation frameworks
Ecohydraulics/ecohydrology and environmental flows
Biofilms and biofouling
Experimental fluid dynamics
Climate change
System optimisation
Numerical modelling

Publications

http://scholar.google.com.au/citations?user=Ydfj6rEAAAAJ&hl=en&oi=sra

School of Science, Information Technology and Engineering

University of Ballarat  -  AUSTRALIA

Visitar la University of  Ballarat a través del siguiente enlace:

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Otra investigación sobre bio película:

Effect of Biofilm Formation on Roughness Coefficient and Solids Deposition in Small-Diameter PVC Sewer Pipes

ISSN (print): 0733-9372
ISSN (online): 1943-7870
Publisher: American Society of Civil Engineers
Karloren Guzmán1; Enrique J. La Motta2; J. Alex McCorquodale3; Soli Rojas4; and Maria Ermogenous5
1Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of New Orleans, New Orleans, LA.
2Professor, Dept. of Civil and Environmental Engineering, Univ. of New Orleans, New Orleans, LA (corresponding author). E-mail: elamotta@uno.edu
3Professor, Dept. of Civil and Environmental Engineering, Univ. of New Orleans, New Orleans, LA.
4Engineer, Montgomery, Watson, and Harza, Tampa, FL.
5Research Assistant, Dept. of Civil and Environmental Engineering, Univ. of New Orleans, New Orleans, LA.
Read More: http://ascelibrary.org/action/showAbstract?page=364&volume=133&issue=4&journalCode=joeedu

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The Impact of Biofilm Development on Pipe Roughness and Velocity Profile

This Paper Appears in

Conference Information :




World Environmental and Water Resources Congress 2009

Kansas City, Missouri, United States

May 17-21, 2009

Publication Data

ISBN (print): 978-0-7844-1036-3
Publisher: American Society of Civil Engineers

Read More: http://ascelibrary.org/doi/abs/10.1061/41036%28342%2913

PENDIENTES   DE   DISEÑO   ALCANTARILLADO   CONSIDERANDO   LA   VARIACION DEL   FACTOR   DE   FRICCION   CON   LA   PROFUNDIDAD   DEL   FLUJO

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