Projekt

Biofilm growth monitoring and control

Udbyder

Vejleder

Sted

Nordjylland

Biofilm, exemplified by the nitrifying bacteria which colonize biofilter elements in biofilter units is central to recirculating aquaculture systems.
There are however uncontrolled growth of biofilm on biofilter carriers and other surfaces, including walls and pipes. The presence, potential implication and consequences of this biofilm is not known. Excessive biofilm growth may lead to impaired nitrification, anoxic zones which in saltwater systems increases the risks of unwanted HS2 release. Further issues caused by biofilm growth can affect geosmine levels, water and tank hydraulic, impair trickling filter efficacy, potentially hide pathogens and led to increased disinfection demand.

To investigate biofilm formation and associated bacterial activity and dynamics, a number of experimentally controlled studies are needed. 

The studies can include test and monitoring of biofilm under different conditions, i.e. as a result of increase dissolved organic matter content, in relation to maintenance and cleaning procedures or when exposed to water borne chemical. Studies looking into flow-patterns and/or use of tracers will also shed new light on the emerging issue relevant for the development and understanding of RAS operation.

Related biofilm investigations can also be made on biofilter elements from controlled experimental RAS and commercial fish farms. The methodology can include gravimetric determination of biofilm formation and include modification of a recent assys to assess microbial activity "Assessment of microbial activity in water based on hydrogen peroxide decomposition rates. 2019. Aquacultural Engineering85, 9-14." 

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Kontakt

Virksomhed/organisation

DTU Aqua

Navn

Lars-Flemming Pedersen

Stilling

Seniorforsker

Mail

lfp@aqua.dtu.dk

Vejleder-info

Kandidatuddannelsen i Akvatisk Videnskab og Teknologi

Vejleder

Lars-Flemming Pedersen

ECTS-point

10 - 35

Type

Bachelorprojekt, Kandidatspeciale, Specialkursus

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

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2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

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