PR 00123: verschil tussen versies
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In the Province of Zeeland ragworms ('' | In the Province of Zeeland ragworms (''Alitta virens'') are farmed on large scale (6 ha) in open rectangular (flow through systems) ponds. Every April these ponds are stocked with ragworm larvae from a hatchery. The juveniles bury themselves in the sediment layer in the pond and are fed with feed pellets. Dependent on the market (bait for fishing or maturation feed for shrimp farming) market size ragworms are harvested after 7 – 20 months. | ||
The | The process water produced by ragworm farming has great potential for growing micro-algae and subsequently bivalves. However, little is known about the composition in terms of dissolved nutrients and particles of the waste streams, under different conditions (density of ragworms, seasonal variations, amount and type of feeding, etc.). | ||
In the past year, laboratory and field settings experiments were conducted to investigate the nutrient balance and possibilities to culture microalgae ''Skeletonema costatum'' on ragworm waste water. Several measurements on the composition in terms of dissolved nutrients and particles of the waste streams, under different conditions (density of ragworms, seasonal variations, amount and type of feeding, etc.) have been carried out. | |||
To get a better insight in the implication of the use of ragworm waste water for algae production on a large scale, a production model might be a useful tool. In the model, the gathered data of the experiments and field situation, together with other available data are combined. Production of algae is coupled with the composition of process water and the dependency on seasonality, feeding rate, density, etc. The goal of the production model is to run different scenarios and evaluate the feasibility of different setups of the large scale coupling of rag worm process water and micro algae production. | |||
'''Research type:''' literature study, experiments (ragworm farm location ) and design a model. | |||
'''Research level:''' final thesis (BSc./MSc. level) | |||
'''Prerequisite:''' good understanding of biology/chemistry; good analytical and Excel skills; communicative; computer skills | |||
'''Partners''': several Small and Medium (Aquaculture) Enterprises, Flemish knowledge partners, Province of Zeeland | |||
'''Researcher involved:''' research group aquaculture (Michel Trommelen and Jouke Heringa) | |||
'''Period:''' 2nd semester 2017-2018 | |||
'''Status:''' Open | |||
{{Project config}} | |||
{{Project | {{Project | ||
|Supercontext= | |Supercontext=PR_00317 | ||
|Project type=Standaard | |Project type=Standaard | ||
|Name= | |Name=Modelling sustainable use of process streams in ragworm culture | ||
|Start date= | |Start date=2018/02/01 | ||
|End date=2018/ | |End date=2018/06/30 | ||
|Summary= | |Summary=What determines the composition and total amount of the process streams in ragworm farming? How can process streams be used in an optimal way? To get a better insight in the implication of the use of ragworm waste water for algae production on a large scale, a production model might be a useful tool. In the model, the gathered data of previous experiments on mass balances and field situation, together with other available data should be combined. | ||
|Show summary=Nee | |Show summary=Nee | ||
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| Regel 21: | Regel 34: | ||
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|Show info=Ja | |Show info=Ja | ||
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Huidige versie van 14 mei 2020 om 13:24
In the Province of Zeeland ragworms (Alitta virens) are farmed on large scale (6 ha) in open rectangular (flow through systems) ponds. Every April these ponds are stocked with ragworm larvae from a hatchery. The juveniles bury themselves in the sediment layer in the pond and are fed with feed pellets. Dependent on the market (bait for fishing or maturation feed for shrimp farming) market size ragworms are harvested after 7 – 20 months.
The process water produced by ragworm farming has great potential for growing micro-algae and subsequently bivalves. However, little is known about the composition in terms of dissolved nutrients and particles of the waste streams, under different conditions (density of ragworms, seasonal variations, amount and type of feeding, etc.).
In the past year, laboratory and field settings experiments were conducted to investigate the nutrient balance and possibilities to culture microalgae Skeletonema costatum on ragworm waste water. Several measurements on the composition in terms of dissolved nutrients and particles of the waste streams, under different conditions (density of ragworms, seasonal variations, amount and type of feeding, etc.) have been carried out.
To get a better insight in the implication of the use of ragworm waste water for algae production on a large scale, a production model might be a useful tool. In the model, the gathered data of the experiments and field situation, together with other available data are combined. Production of algae is coupled with the composition of process water and the dependency on seasonality, feeding rate, density, etc. The goal of the production model is to run different scenarios and evaluate the feasibility of different setups of the large scale coupling of rag worm process water and micro algae production.
Research type: literature study, experiments (ragworm farm location ) and design a model.
Research level: final thesis (BSc./MSc. level)
Prerequisite: good understanding of biology/chemistry; good analytical and Excel skills; communicative; computer skills
Partners: several Small and Medium (Aquaculture) Enterprises, Flemish knowledge partners, Province of Zeeland
Researcher involved: research group aquaculture (Michel Trommelen and Jouke Heringa)
Period: 2nd semester 2017-2018
Status: Open