Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 350466
Title Report Task 2.3: Particulate waste and turbidity in (marine) RAS
Author(s) Kals, J.; Schram, E.; Brummelhuis, E.B.M.; Bakel, B. van
Source IJmuiden : IMARES (Report / IMARES C070/06) - 41
Department(s) Wageningen Marine Research
Publication type Research report
Publication year 2006
Keyword(s) afvalbeheer - aquacultuur - feces - visvoeding - biofilms - vaste stoffen - zwevende deeltjes - aquacultuur en milieu - waste management - aquaculture - faeces - fish feeding - biofilms - solids - suspended solids - aquaculture and environment
Categories Aquaculture Husbandry and Management / Water Quality / Waste Water Treatment
Abstract Particulate waste management and removal is one of the most problematic parts of recirculation aquaculture systems (RAS). Particulate waste and thereby turbidity originates from three major sources: fish (faeces), feed and biofilm (heterotrophic bacteria and fungi). Based on size and density there are roughly four categories of particulate waste: settable, suspended, floatable and fine or dissolved solids. Specific problems related to high turbidity are a decreasing feed intake by fish, causing lower growth and increasing feed loss; an increasing risk regarding pathogens increasing disease problems and gill irritation; a higher oxygen consumption of the system and more complicate visual observation of fish, which is a necessity for good farm management. Good particulate matter and turbidity control is one of the key factors determining the success of RAS. The goal of this task is to get a better understanding of the nature of turbidity and the role of the different water treatment units within RAS and finally find ways to achieve a better control of turbidity.
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