渔业现代化

渔业现代化 ›› 2023, Vol. 50 ›› Issue (6): 9-.

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不同碳氮比对生物絮凝技术（BFT）养殖水体中土腥味物质积累量的影响

  1. （1上海海洋大学上海水产养殖工程技术研究中心, 上海 201306；
    2 江西省水产科学研究所，江西南昌 330039；
    3上海市水产动物良种创制与绿色养殖协同创新中心, 上海 201306；
    4上海海洋大学水产科学国家级实验教学示范中心, 上海201306）
  • 出版日期:2023-12-20 发布日期:2024-01-05
  • 作者简介:崔佳勤(1997—)，女，硕士研究生, 研究方向: 水产养殖水环境调控及养殖用水重复利用。E-mail: 2523694857@qq.com
  • 基金资助:
    上海市科学技术委员地方院校能力提升项目“凡纳滨对虾陆基循环水高效养殖工艺研究与示范（23010502300）”

Effects of different carbon to nitrogen ratios on off flavor in BFT

  1. （1 Shanghai Engineering Research Center of Aquaculture，Shanghai Ocean University，Shanghai 201306，China; 
    2  Jiangxi fisheries Research Institute，Nanchang， 330039，Jiangxi, China；
    3  Shanghai Collaborative Innovation Center for Cultivating Elite Breeds and Green-culture of Aquaculture Animals, Shanghai, 201306;
    4  Key Laboratory of Freshwater Aquatic Germplasm Resources，Ministry of Agriculture and Rural Affairs，Shanghai Ocean University，Shanghai, 201306）

  • Online:2023-12-20 Published:2024-01-05

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摘要： 为探究生物絮凝技术（Biofloc technology, BFT）中不同碳氮比对水体中土腥味物质积累量的影响，以养虾排放的生物絮团为研究对象，设置了不同的初始溶解性有机碳（Dissolved Organic Carbon, DOC）/溶解性无机氮（Dissolved Inorganic Nitrogen，DIN）梯度，分别为A组（不添加葡萄糖组，C/N为6）、B组（C/N为10）和C组（C/N为20），进行为期7 d的试验，每日进行一次水质监测，试验开始和结束时检测BFT水体中土臭素（Geosmin, GSM）和二甲基异莰醇（2-Methylisoborneol, 2-MIB）的含量，取生物絮团进行营养指标检测。结果显示：B组的GSM和2-MIB积累量分别为22.41 ng/L和 -0.19 ng/L， 显著低于A组（76.4 ng/L和4.43 ng/L）C组（50.98 ng/L和3.52 ng/L，P<0.05）；试验期间，各组水体中总氨氮和亚硝酸盐氮质量浓度均处于较低水平，分别低于0.10 mg/L和0.15 mg/L；B组生物絮团的粗蛋白含量最高，为31.64%±0.22%。研究表明，添加葡萄糖能有效减少GSM和2-MIB的生成积累量，调控BFT水体中的C/N为10时，减少GSM和2-MIB生成积累量的效果最明显，同时有水质改良效果。


关键词: 生物絮凝技术, 碳氮比, 土臭素, 二甲基异莰醇, 循环水养殖

Abstract: To investigate the effect of different C/N on the accumulation of off flavor in biofloc reactor, different initial DOC/DIN(Dissolved organic carbon, DOC: Dissolved inorganic nitrogen, DIN)  gradients were set up for group A (no glucose added, C/N of 6), group B (C/N of 10) and group C (C/N of 20) by adding glucose to the bioflocs released from shrimp farming and a 7-day experiment was conducted.Water quality monitoring was carried out everyday. The concentrations of Geosmin (GSM) and 2-Methylisoborneol (2-MIB) in the BFT water were detected at the beginning and end of the experiment and the flocs were taken for nutrient index detection.The results showed that the accumulation of Geosmin (GSM) and 2-Methylisoborneol (2-MIB) was 22.41 ng/L and -0.19 ng/L at C/N of 10, which were significantly lower than those in the C/N of 6 group (76.4 ng/L and 4.43 ng/L) and C/N of 20 group (50.98 ng/L and 3.52 ng/L), respectively; the total ammonia nitrogen and nitrite nitrogen concentrations were lower than 0.10 mg/L and 0.15 mg/L, respectively, in all groups during the experiment; the crude protein content of bioflocs was highest at 31.64 %±0.22 % at C/N of 10. It was shown that the addition of glucose can effectively reduce the accumulation of GSM and 2-MIB production, and the most effective of reducing the accumulation of GSM and 2-MIB production was achieved when the C/N in the biofloc reactor was 10, as well as having water quality improvement effect.


Key words: biofloc technology, carbon to nitrogen ratio, Geosmin, 2-Methylisoborneol, Recirculating aquaculture system