Effects of carbon source, nitrogen source, and natural algal powder-derived carbon source on biodegradation of tetracycline (TEC)
Effects of carbon source, nitrogen source, and natural algal powder-derived carbon source on biodegradation of tetracycline (TEC)
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DOI：
10.1016/j.biortech.2019.121567
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发表时间：
2019-09-01
影响因子：
11.4
通讯作者：
Chen, Yuancai
中科院分区：
文献类型：
--
作者：
Shao, Sicheng;Hu, Yongyou;Chen, Yuancai
本研究旨在研究好氧条件下克雷伯氏菌（Klebsiella sp. sqy5）介导的四环素（TEC）降解、氮(N)转化及其在不同碳氮源影响下的机制。结果表明，在对NH4+-N和NO3——N去除率分别为0.97 mg. l -1 h（-1）和1.97 mg. l -1 h（-1）的条件下，TEC的去除率为34.71%。探讨了水产养殖废水中天然藻粉粉作为TEC降解和反硝化碳源的研究。结果表明，在72 ~ 108 h内，以0.11 mg.L-1.h（-1）和1.34 mg.L-1.h（-1）的还原和反硝化速率，TEC和NO3——N的去除率分别为49.95%和60.45%。还提出了TEC降解和N转化过程的机制，分析表明特定的功能基因在这一过程中起重要作用。
The present study aimed to investigate Klebsiella sp. SQY5-mediated tetracycline (TEC) degradation, nitrogen (N) conversion, and mechanisms underlying this process as influenced by various carbon and N sources under aerobic conditions. Effects of additional organic carbon sources on TEC degradation and N conversion processes were explored, and we found that 34.71% of TEC was degraded at removal rates of 0.97 mg.L-1.h (-1) for NH4+-N and 1.97 mg.L-1.h(-1) for NO3--N. A study examining powder natural algal powder in aquaculture wastewater as a carbon source for TEC degradation and denitrification process was also discussed. It suggested that 49.95% of TEC and 60.45% of NO3--N were removed with a reduction and denitrification rate of 0.11 mg.L-1.h(-1) and 1.34 mg.L-1.h(-1), respectively, within 72-108 h. Mechanisms underlying TEC degradation and N conversion processes were also proposed, and analysis indicated that specific functional genes played an important role in this process.