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Type of publication: research article
Type of publication (PDB): Straipsnis kitose duomenų bazėse / Article in other databases (S4)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Mongirdas, Viktoras;Žibienė, Gražina;Žibas, Alvydas
Title: Waste and its characterization in closed recirculating aquaculture systems – a review
Is part of: Journal of water security / Aleksandras Stulginskis university, Riga Technical University. , 2017, vol. 3, article number: jws2017002
Extent: p. 1-8
Date: 2017
Note: eISSN 2345-0363
Keywords: Aquaculture waste;Recirculating aquaculture system;Wastewater treatment
Abstract: Just like every economic activity, aquaculture has a particular effect on environment, which manifests itself due to waste through declining quality of subterranean water and eutrophication of surrounding surface water. Less than half of the feed in aquaculture is digested and assimilated, the rest ending up as waste either solid or dissolved and the nutrients phosphorus (P) and nitrogen (N) that are derived from fish excretion, faeces, and uneaten feed. The advantage of recirculating aquaculture systems (RAS) is that their wastewater discharges are 10–100 times lower and pollutant concen-tration respectively 10–100 times higher and can reach the level of pollution of household waste. This makes the pollution much easier to control. Additionally, striving to ensure and improve the stability and longevity of RAS, additional technological solutions, warranting the reduction of the amount of used water, waste concentration increase and their sec-ondary utilization as bio stock are added. This article presents the research information from the engineering perspective, summarizing RAS design sensitive data concerning aquacultural waste components excreted in RAS
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Journal of Water Security 2017, vol. 3
Universiteto mokslo publikacijos / University Research Publications

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