Water purification by oyster shell bio-medium in a recirculating aquaponic system
| Autor: | Jung-Hua Chou, Hsing Yuan Yen |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Total organic carbon Environmental Engineering biology 0208 environmental biotechnology Environmental engineering Portable water purification 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Biodegradation biology.organism_classification 01 natural sciences 020801 environmental engineering chemistry Spinach Organic matter Nitrification Aquaponics Effluent 0105 earth and related environmental sciences Nature and Landscape Conservation Nuclear chemistry |
| Zdroj: | Ecological Engineering. 95:229-236 |
| ISSN: | 0925-8574 |
| Popis: | In this study, water purification for cultivating water spinach (WS) or sweet basil (SB) by a recirculating aquaponic system (RAS) was investigated using either an oyster shell (OS) or ceramic ring (CR) bio-medium. Four combinations of OS + WS, OS + SB, CR + WS, and CR + SB were evaluated. The results show that the bio-medium affects both the transfer of NH3-N to NO3-N and the biodegradation of organic matter. OS significantly increased the pH and calcium in the effluent. The SEM results revealed that OS has a layer-by-layer structure which supports the growth of a biofilm; the main component CaCO3 of OS released to the solution increases the pH, leading to good nitrification. The total organic carbon (TOC) measurement shows that both bio-media decompose organic matter to smaller than 1 k Da TOC, which provides nutrients that are readily absorbable by the vegetables. Furthermore, the water purification efficiency of RAS is OS + WS > OS + SB > CR + WS > CR + SB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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