The use of vertical constructed wetland and ultrasound in aquaponic systems

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• 作者：A. Krivograd Klemen?i? ; T. Griessler Bulc
• 关键词：Aquaponics ; Constructed wetland ; Fish farming ; Recirculation ; Ultrasound ; Water treatment ; Water reuse
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：22
• 期：2
• 页码：1420-1430
• 全文大小：405 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Treatment performance, fish production, crop plant biomass production, water consumption, and water use efficiency of a pilot aquaponic system for small-scale land-based cyprinid fish farms were evaluated. The system consisted of a 36?m3 Pond A with an initial carp load of 0.6?kg/m3; of a treatment chain with a lamellar settler, a roughing filter, a vertical constructed wetland filled with expanded clay and planted with tomatoes; and of a low power ultrasound unit installed in the corner of the pond. The average circulation of the water in the system was 1.2 times per day. Pond A was compared with Pond B of the same dimensions and fish load but with no treatment chain or ultrasound. The treatment chain was efficient in mass removal of total suspended solids , biochemical oxygen demand, chemical oxygen demand, NH4-N, total nitrogen, and total phosphorous (57, 49, 35, 42, 31, and 25?%, respectively). Negative removal of NO3-N, NO2-N, and PO4-P indicated the need for the introduction of additional hydroponic beds in the system. Pond A had markedly lower nutrient concentrations compared with Pond B. Fish body weight increase and specific growth rate in Pond A were higher than in Pond B (102.6?%, 72.1?%; 0.19?%/day, 0.14?%/day, respectively) indicating better rearing conditions in Pond A. Tomato biomass production was high. Water use efficiency was higher in Pond A compared with Pond B (0.31?kg of produced fish/m3 inflow water and 0.22?kg of produced fish/m3 inflow water, respectively). The presented aquaponic system could be useful for semi-natural fish farming with fish loads up to 2?kg/m3.