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首页> 外文期刊>Aquacultural Engineering: An International Journal >The performance and impact of a bubble-wash bead filter in a recirculating green water larval culture system for delta smelt (Hypomesus transpacificus)
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The performance and impact of a bubble-wash bead filter in a recirculating green water larval culture system for delta smelt (Hypomesus transpacificus)

机译：气泡洗珠过滤器在三角洲冶炼（Hypomesus transpacificus）循环绿水幼虫培养系统中的性能和影响

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Delta smelt are cultured at the UC Davis Fish Conservation and Culture Lab (FCCL) for research purposes. The culture systems used are based on recirculation technology to ensure optimum water quality for the fish at each life stage. Larval culture takes place in recirculation systems with green water to which a Nannochloropsis algal concentrate is added to maintain a turbidity of approximately 9 NTU. A bubble-wash bead filter is used to remove total suspended solids (TSS) from the recirculation system. The performance of the bubble-wash bead filter has been evaluated by testing the TSS and particle size distribution in two parallel systems operated in the same way. The need for bubble-wash bead filter backwashing and the impact of the backwash method were evaluated also.The results show that the bubble-wash bead filter removed a great deal of the TSS, including the algae added to maintain the turbidity. An improper backwash method could result in a short term but significantly high TSS peak in the system immediately after the backwash event. Testing over an extended filtration period with a prolonged backwash interval showed that the 155 in the system remained stable up to 150 h post backwash, at which time it increased rapidly. The TSS accumulation in the system with a bubble-wash bead filter that was not backwashed was greater than that in a parallel system without a bubble-wash bead filter. No significant mortality increase was found in the system without a bubble-wash bead filter for 34 days, which provides a possible alternative in order to lower the rearing cost. Nevertheless, there are benefits of using a bead filter, and these are discussed in the paper
机译：三角洲的冶炼厂在加州大学戴维斯分校的鱼类保护和养殖实验室（FCCL）进行养殖，以进行研究。所使用的养殖系统基于再循环技术，以确保鱼类在每个生命阶段均具有最佳的水质。幼虫培养是在循环系统中用绿水进行的，在绿水中添加了Nannochloropsis藻类浓缩物以保持大约9 NTU的浊度。气泡洗珠过滤器用于从再循环系统中去除总悬浮固体（TSS）。通过在以相同方式运行的两个并行系统中测试TSS和粒径分布，可以评估气泡洗珠过滤器的性能。还评估了泡沫洗珠过滤器反冲洗的必要性以及反洗方法的影响。结果表明，泡沫洗珠过滤器去除了大量的TSS，包括为维持浊度而添加的藻类。不正确的反冲洗方法可能会在反冲洗事件发生后立即在系统中产生短期但明显较高的TSS峰值。在延长的过滤时间内进行的测试以及延长的反冲洗间隔表明，系统中的155在反冲洗后长达150小时内保持稳定，这时它迅速增加。在不进行反冲洗的情况下，带有气泡洗净过滤器的系统中的TSS累积要比没有气泡洗净器的并行系统中的TSS累积要大。在无气泡洗涤珠粒过滤器的情况下，连续34天没有发现死亡率显着增加的情况，这为降低饲养成本提供了可能的替代方法。尽管如此，使用磁珠过滤器还是有好处的，本文对此进行了讨论。

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