| Publication type: | Conference other |
| Type of review: | Not specified |
| Title: | Economic evaluation of nitrogen reduction in RAS |
| Authors: | Regazzoni, Luca |
| et. al: | No |
| Conference details: | 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022 |
| Issue Date: | 18-May-2022 |
| Language: | English |
| Subject (DDC): | 639.8: Aquaculture |
| Abstract: | Conventional recirculating aquaculture systems (RAS) cause significant nitrogen discharge, which can lead to eutrophication and nitrate infiltration into ground water. Furthermore, a high water exchange in the system leads to high operating costs (through the loss of salt, buffer capacity, thermal energy and discharge fees). Furthermore, more stringent regulations for discharge (as apparent from other countries) could come into play and further exacerbate discharge into recieving waters. These challenges can be alleviated using a denitrification reactor, removing the nitrate from the system water and, thus, facilitating a reduced water exchange. However, economical benefits typically outweigh the ecological incentive. Based on a mathematical model, this study aims to quantify economical benefits of the denitrification process in RAS and quantifies the reduction of emissions of three different system configurations: Scenario 1: conventional RAS (without denitrification); Scenario 2: RAS with denitrification (conventional carbon source = methanol); Scenario 3: RAS with denitrification using endogenous carbon (from system-sludge). The results of the study showed a major reduction in water exchange, buffer capacity (up to 60% reduction) and salt consumption (50 - 65%) for scenario 2 and 3. Furthermore, the potential reduction in operational expenditures for scenario 2 lays at CHF 376.- per ton of fish production and up to CHF 699.- per ton of fish production for Scenario 3. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/29128 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | Life Sciences and Facility Management |
| Organisational Unit: | Institute of Natural Resource Sciences (IUNR) |
| Appears in collections: | Publikationen Life Sciences und Facility Management |
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Regazzoni, L. (2022, May 18). Economic evaluation of nitrogen reduction in RAS. 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022.
Regazzoni, L. (2022) ‘Economic evaluation of nitrogen reduction in RAS’, in 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022.
L. Regazzoni, “Economic evaluation of nitrogen reduction in RAS,” in 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022, May 2022.
REGAZZONI, Luca, 2022. Economic evaluation of nitrogen reduction in RAS. In: 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022. Conference presentation. 18 Mai 2022
Regazzoni, Luca. 2022. “Economic Evaluation of Nitrogen Reduction in RAS.” Conference presentation. In 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022.
Regazzoni, Luca. “Economic Evaluation of Nitrogen Reduction in RAS.” 10th Meeting of the IG Aquaculture, Zollikofen, Switzerland, 18 May 2022, 2022.
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