利用农杆菌 SUTS 1 和假单胞菌 SUTS 2 对电镀废水中的金属氰化物络合物进行生物修复,以便长期应用。

IF 2.6 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
3 Biotech Pub Date : 2024-11-01 Epub Date: 2024-10-29 DOI:10.1007/s13205-024-04122-3
Nootjalee Supromin, Siraporn Potivichayanon
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引用次数: 0

摘要

本研究的目的是调查长期运行生物反应器系统的最佳条件,包括好氧和缺氧条件,以便利用农杆菌 SUTS 1 和假单胞菌 SUTS 2 降低含有金属氰化物的工业电镀废水的毒性。 初步结果显示,细菌在好氧条件下的表现优于缺氧条件。随后,在最佳操作条件下进行了为期 30 天的长期研究,建立了一个好氧生物反应器系统。在研究的前 7 天,混合培养细菌和本地细菌都促进了氰化物和金属的高效处理。当系统具有高去除率时,氰化物的去除率高于锌、铜、镍和铬(CN- > Zn > Cu > Ni > Cr),去除率分别为 96.67%、93.93%、74.17%、63.43% 和 44.65%,残留浓度分别为 0.15 ± 0.01、0.24 ± 0.005、0.03 ± 0.002、18.41 ± 0.06 和 14.26 ± 0.15 mg/L。生物反应器中的细胞浓度在 30 天内从混合培养和本地接种的初始细胞浓度分别为 6.15 × 105 CFU/mL 和 1.05 × 103 CFU/mL,增加到约 107 CFU/mL。这些结果表明,细菌对重金属毒性具有抗性。在生物反应器中加入适当的碳源和充分的通气可提高氰化物的降解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bioremediation of metal cyanide complexes from electroplating wastewater for long-term application using Agrobacterium tumefaciens SUTS 1 and Pseudomonas monteilii SUTS 2.

The purpose of this study was to investigate the optimum conditions, including aerobic and anoxic conditions, for operating a long-term bioreactor system to decrease the toxicity of industrial electroplating wastewater effluents containing metal cyanide using Agrobacterium tumefaciens SUTS 1 and Pseudomonas monteilii SUTS 2. The initial results revealed that bacteria performed better under aerobic conditions than under anoxic conditions. An aerobic bioreactor system was subsequently set up in a long-term study lasting 30 days under optimum operating conditions. Both mixed-culture bacteria and indigenous bacteria promoted the high-efficiency treatment of cyanide and metals in the first 7 days of the study. When the system had high removal rates, cyanide removal was greater than that of zinc, copper, nickel, and chromium (CN- > Zn > Cu > Ni > Cr), with removal efficiencies of 96.67%, 93.93%, 74.17%, 63.43%, and 44.65%, respectively, with residual concentrations of 0.15 ± 0.01, 0.24 ± 0.005, 0.03 ± 0.002, 18.41 ± 0.06 and 14.26 ± 0.15 mg/L, respectively. The cell concentration in the bioreactor increased to approximately 107 CFU/mL over 30 days from initial cell concentrations of 6.15 × 105 CFU/mL and 1.05 × 103 CFU/mL for the mixed culture and indigenous inoculation, respectively. These results implied that the bacteria were resistant to heavy metal toxicity. The addition of an appropriate carbon source with sufficient aeration to a bioreactor resulted in increased cyanide degradation.

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来源期刊
3 Biotech
3 Biotech Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
6.00
自引率
0.00%
发文量
314
期刊介绍: 3 Biotech publishes the results of the latest research related to the study and application of biotechnology to: - Medicine and Biomedical Sciences - Agriculture - The Environment The focus on these three technology sectors recognizes that complete Biotechnology applications often require a combination of techniques. 3 Biotech not only presents the latest developments in biotechnology but also addresses the problems and benefits of integrating a variety of techniques for a particular application. 3 Biotech will appeal to scientists and engineers in both academia and industry focused on the safe and efficient application of Biotechnology to Medicine, Agriculture and the Environment.
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