Nutrients' removal from aquaculture wastewater using the macroalgae Gracilaria birdiae.
Nutrients' removal from aquaculture wastewater using the macroalgae Gracilaria birdiae.
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DOI：
10.1016/j.biombioe.2008.07.002
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发表时间：
2009-02
影响因子：
6
通讯作者：
E. Marinho-Soriano;S. O. Nunes;M. Carneiro;D. C. Pereira
中科院分区：
文献类型：
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作者：
E. Marinho-Soriano;S. O. Nunes;M. Carneiro;D. C. Pereira
集约化水产养殖向水生生态系统释放大量营养物质，可能导致沿海水域富营养化。在水产养殖系统中进行的研究表明，当使用具有经济重要性的物种时，海藻在减少营养物质方面是有效的，同时还提供了额外的收入。本研究旨在评估是否可以有效地培养江豚，以产生有用的藻类生物量和去除虾池污水中的营养物质。结果表明，在实验期间，生物量和相对生长率(RGR)逐渐增加。平均相对生长率变化显著(p<；0.0 1)，最大为3.6±0.35%d−1，最小为1.6±0.5 2%d−1。整个周期的平均值为2.6%d−1。研究期间所分析的三种营养物(PO43−、NH4+和NO3−)的浓度显著降低，证实了小菜蛾的生物过滤能力。经过4周的实验，PO43-−下降了93.5%，NH4+下降了34%，NO-3-−下降了100%。本研究结果表明，该菌可作为生物滤池应用于水产养殖系统。此外，生产的大型藻类生物量为提取藻胶琼脂、人类食品和动物饲料提供了替代原料来源。
Intensive aquaculture releases large amount of nutrients into aquatic ecosystems and can lead to eutrophication of coastal waters. Studies conducted in aquaculture systems have demonstrated that the seaweeds are efficient in reducing nutrients and at the same time provides extra income, when species of economic importance are used. This study was conducted to evaluate whether Gracilaria birdiae could be cultivated efficiently for the production of useful algal biomass and removal of nutrients from shrimp pond effluents. The results obtained showed a gradual increase in biomass and relative growth rate (RGR) over the experimental period. Mean RGR between the weeks varied significantly (p<0.01), reaching a maximum of 3.6±0.35%d−1and a minimum of 1.6±0.52%d−1. The mean for the whole period was 2.6%d−1. The biofiltration capacity of G. birdiae was confirmed by the significantly reduced concentration of the three nutrients analyzed (PO43−, NH4+and NO3−) over the study period. The concentration of PO43−decreased by 93.5%, NH4+by 34% and NO3−by 100% after the 4-week experimental period. The results obtained in this study indicated that G. birdiae can be used in aquaculture systems as a biofilter. In addition, the macroalgae biomass produced offers alternative source of raw material for the extraction of the phycocolloid agar, human food and animal feed.