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Effects of microbubble aeration on water quality and growth performance of Litopenaeus vannamei in biofloc system
Aquacultural Engineering ( IF 4 ) Pub Date : 2021-03-30 , DOI: 10.1016/j.aquaeng.2021.102159
Yan Shin Lim , P. Ganesan , M. Varman , F.A. Hamad , Sivakumar Krishnasamy

This study investigated the water quality and growth performance of white shrimps, Litopenaeus vannamei, for 70 days using microbubble (MB) aeration with biofloc culture. Similar investigations were conducted based on larger air bubbles produced by a conventional aquarium air stone. The water quality parameters, such as, dissolved oxygen (DO), temperature, pH, salinity, alkalinity, total ammonia nitrogen (TAN), nitrite-N, nitrate-N, suspended solids (SS) and total suspended solids (TSS) were recorded throughout the culture period. The growth of L. vannamei was compared between cultures using microbubble and macro-bubble aerations in terms of weight and length weekly throughout the 70-days. Although the microbubble aeration increased the water temperature by 2 , the increased rate of pH reduction and conversion of TAN to nitrate indicated that microbubble aeration enhanced the water quality. Based on the results, with a lower average food conversion ratio (FCR) value of 0.80, the shrimps cultured using the MB aeration yielded a higher mean weight (5.93 g ± 1.90) and length (9.80 cm ± 1.03) at the end of the culture period. However, large bubbles (LB) aeration yielded an FCR value of 1.41 to produce shrimps with a lower mean weight (2.77 g ± 0.66) and length (7.78 cm ± 0.57). In conclusion, this study revealed that the MB aeration could boost the growth of both biofloc and L. vannamei by reducing the FCR value.



中文翻译:

微泡曝气对生物絮凝系统中凡纳滨对虾水质和生长性能的影响

这项研究使用微絮团(MB)曝气与生物絮凝剂培养研究了白虾南美白对虾70天的水质和生长性能。基于常规水族馆气石产生的较大气泡进行了类似的研究。水质参数,例如溶解氧(DO),温度,pH,盐度,碱度,总氨氮(TAN),亚硝酸盐-N,硝酸盐-N,悬浮固体(SS)和总悬浮固体(TSS)为在整个文化时期记录下来。比较了使用微泡和大泡曝气的培养物中南美白对虾的生长情况,在整个70天中,每周的重量和长度均如此。尽管微气泡曝气将水温提高了2倍,pH降低速率增加以及TAN转化为硝酸盐表明微气泡曝气提高了水质。根据结果​​,在较低的平均食物转化率(FCR)值为0.80的情况下,使用MB曝气培养的虾在后期的平均重量(5.93 g±1.90)和长度(9.80 cm±1.03)较高。文化时期。但是,大气泡(LB)充气产生的FCR值为1.41,从而生产出的虾的平均重量(2.77 g±0.66)和长度(7.78 cm±0.57)较低。总之,这项研究表明,MB曝气可通过降低FCR值来促进生物絮凝物和南美白对虾的生长。

更新日期:2021-04-05
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