生物钯强化反硝化及群体感应调控

作者：Liu Xun; Bi Sijing; Chen Yuancai^*; Hu Yongyou

来源：Chinese Journal of Environmental Engineering, 2023, 17(1): 299-306.

DOI：10.12030/j.cjee.202208022

• biosynthetic palladium
• denitrification
• microbial community structure
• quorum sensing

Nitrogen pollution in waterbody posed a serious threat to eco-environment and human health. Therefore, to explore efficient denitrification methods has become a focus in the field of water treatment. In this study, zero-valent palladium (Bio-Pd0) was in-situ synthesized by anaerobic sludge, and the effect of palladium loading on denitrification was investigated. The results showed that an appropriate amount of palladium loading could accelerate the electron utilization efficiency, reduce the accumulation of nitrite and N2O, and increase the nitrate removal rate by 38.54%, while denitrification was inhibited with excessive palladium. The mechanism was analyzed from the aspects of microbial metabolism and quorum sensing. The results showed that an appropriate amount of palladium loading could promote the metabolic capacity of microorganisms and increase the organic utilization rate. Moreover, the addition of 0.2 g·L?1 group sensing inhibitor (QSI) porcine kidney acylase could further enhance the biological denitrification effect. The results of this study have an important reference for improving the denitrification effect of sewage. ? 2023 Science Press.