Abatement of water nutrient load in a fish culture system using the aquatic trophic levels. (24th October 2021)

• Record Type: Journal Article
• Authors: Poorbagher, Hadi; Rafiee, Gholamreza; Rezaei Tavabe, Kamran; Moezzi, Fateh
• Is Part Of: Water environment research. Volume 93:Number 12(2021)
• Page Start: 3011
• Page End: 3022
• Publication Date: 2021-10-24
• Subjects: algae -- fish -- integrated aquatic culture system -- nutrients loads -- zooplankton; Water quality management -- Periodicals; Water -- Purification -- Periodicals; Water -- Pollution -- Periodicals; Water -- Pollution; Water -- Purification; Water quality management; Sewage; Water Pollution; Periodicals; Electronic journals; Periodicals; 628.16
• DOI: 10.1002/wer.1652
• Languages: English
• ISSNs: 1061-4303

Abstract

Abstract : Abstract: Integrated aquatic systems are used to decrease the nutrient loads of effluents negating the negative environmental impacts of aquacultural systems. Some of these systems have a separate algae compartment requiring high maintenance. An integrated culture system was set up with different trophic levels: algae, zooplankton, and fish. The algal tank was in‐line with the fish and zooplankton components to minimize the maintenance required for the algae. A control flow‐through system was also set up without the algae and zooplankton compartments. The systems were run for 6 weeks, and water temperature, pH, dissolved oxygen, NO3, NO2, NH4, and PO4 concentrations were measured. A removal rate was determined for each water parameter and the densities of the algae and zooplankton species were measured in each compartment of the integrated system. The concentrations of most nutrients in the integrated system were similar to those of the control system. The density of algae increased during the first 3 weeks and remained almost stable until the end of the experiment. There was an inverse relationship between the densities of two zooplankton suggesting compensatory effects on the control of the algal bloom. The integrated system improved water quality with minimal algal culture maintenance, water exchange, and no fish mortality. Practitioner Points: An integrated system could effectively reduce the nutrient load of water. Water replacement in the integrated system was significantly lower than that of a flow through system. The inline plankton culture tanks decreased greatly the maintenance of the system. Abstract : An Integrated aquatic system was used to decrease the nutrient loads of effluents in an aquacultural system. The system was set up with different trophic levels including algae, zooplankton and fish. The algal tank was in‐line with other components and minimized the maintenance required for the algae.