The use of biological traps for water treatment in Recirculating Aquaculture Systems
Stevcic, C., Pulkkinen, K. and Pirhonen, J. (2018). The use of biological traps for water treatment in Recirculating Aquaculture Systems. 5th European Congress of Conservation Biology. doi: 10.17011/conference/eccb2018/108110
Päivämäärä
2018Tekijänoikeudet
© the Authors, 2018
Increasing global demand for fish and the depletion of natural fish stocks has stimulated the development of aquaculture all over the world. One of the main restrictions for future growth and sustainability of the aquaculture lies in its waste discharge. The main concern includes dissolved or particulate organics, nitrogen and phosphorus, which may lead to eutrophication of aquatic ecosystems receiving the wastewaters. Therefore, nutrient removal is essential for aquaculture wastewater treatment for protection of the surrounding environment.
Recirculating aquaculture systems (RAS), enable fish production in relative isolation from the surrounding environment, and they offer advantages in terms of reduced water consumption, improved opportunities for waste management and nutrient recycling. In RAS a microbial biofilter is used for converting the ammonia excreted by fish into nitrate, and due to the high recirculation of water, the RAS's wastewater is concentrated with nutrients that can be used for microalgae cultivation.
This project will test the hypothesis that by the combination of microalgae and filter feeder cultivation in RAS's effluent, the nutrient release into the environment can be significantly reduced. The objectives are to evaluate (1) the effectiveness of microalgae to remove dissolved nutrients from the RAS's wastewater; (2) the effects of environmental conditions on the algal biomass production. As harvesting of microalgae is a challenging and expensive process, this project will evaluate (3) the potential of Daphnia magna & lake mussel Anodonta anatina to filter the algae from the water. This project will produce new knowledge on nutrient recycling and thus supports the concept of circular economy, and conservational and sustainable management.
Our preliminary results are promising: the tested green microalgae can remove more than 90% of dissolved nitrogen and phosphorus from laboratory-scale RAS's wastewater effluent after 4 days, while still in the exponential growth phase; and more than 99% after 9 days while they are in the saturation growth phase.
RAS production is growing worldwide but also in Finland, thus the potential for re-using valuable nutrients in RAS's wastewater should be investigated to improve the sustainability of aquaculture.
...
Julkaisija
Open Science Centre, University of JyväskyläKonferenssi
ECCB2018: 5th European Congress of Conservation Biology. 12th - 15th of June 2018, Jyväskylä, Finland
Alkuperäislähde
https://peerageofscience.org/conference/eccb2018/108110/Metadata
Näytä kaikki kuvailutiedotKokoelmat
- ECCB 2018 [712]
Lisenssi
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
The use of biological traps for water treatment in recirculating aquaculture systems
Stevčić, Čedomir (Jyväskylän yliopisto, 2021)Wastewater (WW) of recirculating aquaculture systems (RAS) has a high concentration of dissolved nutrients, which enable bioremediation of RAS WW with microalgae. Biological harvesting by filter-feeding organisms offers ... -
Microbiology of biological filters in recirculating aquaculture systems
Pulkkinen, Jani (Jyväskylän yliopisto, 2020)As aquaculture production continues to increase, new technologies have been developed to minimize nutrient emissions or even recover them into other applications. Recirculating aquaculture systems (RAS) may increase ... -
Off‐Flavour Removal With Advanced Oxidation Process and Hydrogen Peroxide Treatments in Recirculating Aquaculture Systems
Pettersson, Samu; Lindholm‐Lehto, Petra C.; Pulkkinen, Jani T.; Tuhkanen, Tuula (John Wiley & Sons, 2024)Aquaculture is becoming increasingly important for the world's food production. Recirculating aquaculture system (RAS) has a reduced water requirement and better possibilities for waste handling. Unfortunately, off-flavours ... -
Tracing activation efficiency of the bio-filtration bacteria in a recirculating aquaculture system using stable isotope analysis
Foore, Nathan (2016)One challenge in starting a new recirculation aquaculture system (RAS) is to find the most efficient method to activate the nitrifying bacterial biofilm in the bio-filtration system. It has been suggested that chemical ... -
Original data for article: Filtration of Nordic recirculating aquaculture system wastewater: effects on microalgal growth, nutrient removal and nutritional value
Calderini, Marco; Stevčić, Čedomir; Taipale, Sami; Pulkkinen, Katja (University of Jyväskylä, Open Science Centre. jyx@jyu.fi, 2020)The data processed and analyzed in this study is divided if five files: Growth_and_Nutrient_removal.txt, FA_concentration.txt, FA_proportion.txt, AA_concentration.txt and AA_proportion.txt. For detailed descriptions of ...
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.