Liu Suo, Li He, Wang Yizhuo
School of Civil Engineering, Southeast University 2# Southeast University Road, Jiangning District Nanjing China
Key Lab of Jiangsu Provincial Environmental Engineering, Jiangsu Provincial Academy of Environmental Science #176 Jiangdong North Road, Gulou District Nanjing China.
RSC Adv. 2023 Jun 1;13(24):16471-16479. doi: 10.1039/d3ra00048f. eCollection 2023 May 30.
This study characterized the effect of different magnetic field (MF) intensities (10-40 mT) on the degradation of dye wastewater by activated sludge and the diversity of the microbial community at a low temperature (5 °C). The examined MF range promoted the degradation of dye wastewater by the microorganisms in the activated sludge at a low temperature. It was found that the optimal degradation performance was achieved at 30 mT. Additionally, the maximum degradation efficiency of COD and chromaticity (66.30% and 60.87%, respectively) were also achieved at 30 mT and the peak TTC-dehydrogenase activity (TTC-DHA) was 9.44 mg TF g SS. Furthermore, it was revealed that MF enhancement increased the richness and diversity of activated sludge microorganisms, thus promoting the growth and reproduction of activated sludge microorganisms at low temperatures. Bacterial taxa known to effectively participate in the degradation of pollutants by activated sludge were enriched at 30 mT. The dominant bacteria under 30 mT were , , , , , , and .
本研究表征了不同磁场（MF）强度（10 - 40 mT）对低温（5℃）下活性污泥降解染料废水的影响以及微生物群落的多样性。所考察的MF范围促进了低温下活性污泥中微生物对染料废水的降解。结果发现，在30 mT时实现了最佳降解性能。此外，在30 mT时也实现了COD和色度的最大降解效率（分别为66.30%和60.87%），且TTC脱氢酶活性（TTC - DHA）峰值为9.44 mg TF g SS。此外，研究表明MF增强增加了活性污泥微生物的丰富度和多样性，从而促进了低温下活性污泥微生物的生长和繁殖。已知能有效参与活性污泥降解污染物的细菌类群在30 mT时得到富集。30 mT下的优势细菌为 ， ， ， ， ， ，以及 。
