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Light as a key driver of freshwater biofouling surface roughness in an experimental hydrocanal pipe rig

journal contribution
posted on 2023-05-18, 19:44 authored by Ravizza, M, Dean GiosioDean Giosio, Alan HendersonAlan Henderson, Mark HovendenMark Hovenden, Hudson, M, Salleh, S, Jane SargisonJane Sargison, Shaw, JL, Walker, J, Gustaaf HallegraeffGustaaf Hallegraeff
Biofouling in canals and pipelines used for hydroelectric power generation decreases the flow capacity of conduits. A pipeline rig was designed consisting of test sections of varying substrata (PVC, painted steel) and light levels (transparent, frosted, opaque). Stalk-forming diatoms were abundant in both the frosted and transparent PVC pipes but negligible in the painted steel and opaque PVC pipes. Fungi were slightly more abundant in the painted steel pipe but equally present in all the other pipes while bacterial diversity was similar in all pipes. Photosynthetically functional biofouling (mainly diatoms) was able to develop in near darkness. Different biological fouling compositions generated differing friction factors. The highest friction factor was observed in the transparent pipe (densest diatom fouling), the lowest peak friction for the opaque PVC pipe (lowest fouling biomass), and with the painted steel pipe (high fouling biomass, but composed of fungal and bacterial crusts) being intermediate between the opaque and frosted PVC pipes.

Funding

Australian Research Council

Hydro Tasmania

History

Publication title

Biofouling

Volume

32

Issue

6

Pagination

685-697

ISSN

0892-7014

Department/School

Institute for Marine and Antarctic Studies

Publisher

Taylor & Francis Ltd

Place of publication

4 Park Square, Milton Park, Abingdon, England, Oxon, Ox14 4Rn

Rights statement

Copyright 2016 Informa UK Limited, trading as Taylor & Francis Group

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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