The construction of coupling degradation system low temperature plasma and microbiological denitrification:...

The degradation of antibiotic wastewater by low-temperature plasma and the removal of excess nitrogen by biological denitrification with Pseudomonas stutzeri (P. stutzeri) reducing secondary pollution has rarely been reported. In this study, iron and phenolic resin doped carbon-based porous nanofiber membranes are prepared (named RFe₂-CNF) by electrostatic spinning technique, where the optimization of structure and composition endows low-temperature plasma system better catalyst performance than that of without catalyst (a 58% increase). Microbiological treatment experiments show that the plasma-degraded solution inhibits the denitrification of the P. stutzeri, but overall shows a strong denitrification effect (93.1%). In the coupling process of advanced oxidation technology and microbial denitrification technology, the possible interfacial reaction process, synergistic degradation mechanism, and products toxicity analysis are studied in detail. In addition, LC-MS and DFT are used to derive possible degradation pathways of pollutants. This work provides a new strategy to improve the degradation performance meanwhile reducing secondary pollution by low-temperature plasma-coupled microbiological treatment.