渔业现代化2023，Vol.50Issue(6)：9-16,8.DOI:10.3969/j.issn.1007-9580.2023.06.002
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
Effects of different carbon to nitrogen ratios on off flavor in BFT
摘要
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.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Key words
biofloc technology/carbon to nitrogen ratio/Geosmin/2-Methylisoborneol/Recirculating aquaculture system分类
农业科技引用本文复制引用
崔佳勤,章海鑫,罗国芝,谭洪新..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[J].渔业现代化,2023,50(6):9-16,8.基金项目
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)" （23010502300）
