The effects of different seeding ratios on nitrification performance and biofilm formation in marine recirculating aquaculture system biofilter
| Autor: | Shi Mingming, Shen Jiazheng, Zhangying Ye, Yale Deng, Xishan Guo, Songming Zhu, Yunjie Ruan |
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| Rok vydání: | 2015 |
| Předmět: |
0301 basic medicine
Health Toxicology and Mutagenesis 030106 microbiology Aquaculture Bacterial Physiological Phenomena Microbiology 03 medical and health sciences Extracellular polymeric substance Bioreactors Bioreactor Environmental Chemistry Food science biology Bacteria Biofilm Recirculating aquaculture system General Medicine biochemical phenomena metabolism and nutrition biology.organism_classification Pollution Nitrification 030104 developmental biology Biofilms Biofilter Seeding |
| Zdroj: | Environmental science and pollution research international. 23(14) |
| ISSN: | 1614-7499 |
| Popis: | Rapid start-up of biofilter is essential for intensive marine recirculating aquaculture system (RAS) production. This study evaluated the nitrifying biofilm formation using mature biofilm as an inoculum to accelerate the process in RAS practice. The effects of inoculation ratios (0-15 %) on the reactor performance and biofilm structure were investigated. Complete nitrification was achieved rapidly in reactors with inoculated mature biofilm (even in 32 days when 15 % seeding ratio was applied). However, the growth of target biofilm on blank carrier was affected by the mature biofilm inoculated through substrate competition. The analysis of extracellular polymeric substance (EPS) and nitrification rates confirmed the divergence of biofilm cultivation among reactors. Besides, three N-acyl-homoserine lactones (AHLs) were found in the process, which might regulate the activities of biofilm. Multivariate analysis based on non-metric multidimensional scaling (nMDS) also indicated the great roles of AHLs and substrate supply which might fundamentally determine varied cultivation performance on target biofilm. |
| Databáze: | OpenAIRE |
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