At an aquaponics farm in Luxembourg called “Fësch Haff” the effect of the water quality on the growth rate and behaviour of the rainbow trout has been analysed. Three times a week the water quality in the fish tank expressed by temperature, KH (carbonate hardness), pH, ammonium/ammonia, nitrite, nitrate …

Industrial, agricultural, and domestic sectors have an impact on the pollution of surface waters. More specifically, discharges of wastewater treatment plants also have a major impact on the quality of surface waters. According to PBL Netherlands Environmental Assessment Agency, Dutch surface waters …

Water Authority Zuiderzeeland measures many parameters for the WFD objectives, including electrical conductivity (EC). The EC is measured using various measuring devices, through field measurements (manual), telemetry and since 2019 with relatively inexpensive Internet of Things (IoT)sensors. It is not …

Purpose: Dietary nitrate has been shown to enhance muscle contractile function and has, therefore, been linked to increased muscle power and sprint exercise performance. However, the impact of dietary nitrate supplementation on maximal strength, performance and muscular endurance remains to be established. …

n the work package described in this report, members are investigating whether a cooperative of farmers can become self-sufficient in energy and fertilization by using manure and organic waste flows in combination with anaerobic fermentation. The aim is to link the nutrient cycle (from manure to digestate …

The turbidity in Lake Markermeer limits the primary production by phototrophic algae and the growth of plants. In turn, this limits the amount of fish and other organisms that live in and around Lake Markermeer in its food sources. To determine if there are organisms that limit the resuspension, a survey …

This thesis project has been carried out at VHL (Van Hall Larenstein University of Applied Sciences) and consists of three different parts; the first part is an experiment in which during 20 days of cultivation the optimum nitrate concentration for protein production in Ulva lactuca is sought. U. lactuca …

Spatial and temporal patterns in submarine groundwater discharge (SGD) of nitrate in a high-energy sandy beach system on Spiekeroog Island were examined utilizing UV photometry. SGD as pathway of nitrate was studied to gain better understanding of the variability of nitrate discharge and the factors …

Microalgae can produce a wide range of valuable metabolites such as proteins, lipids and pigments, so they can be used in many ways. For aquaculture industry, microalgae are usually used as live feed because of their high nutritional level. Fry Marine(Vlissingen, NL) is a hatchery for marine feed and …