非生物腐殖化的微生物生理效应和产物转化OA北大核心CSTPCD

The transformation behavior of dissolved organic matter in tannery wastewater is still unclear in biological treatment systems.Herein,tannic acid,glycine and glucose were used as raw materials to simulate the abiotic humification of wastewater.By combining with multivariate spectroscopy,we investigated the characteristics of the abiotic humus products,the transformation and the effects on the metabolic activity of microorganisms in both pure and mixed culture systems.Results showed that tannic acid promoted the abiotic humification process,while the fluorescence intensity of the amino acid-like region was enhanced at 48 h-1 000 mg/L in the pure culture after the microorganisms were exposed to the abiotic humification system.The fluorescence intensity was the strongest in the humic acid-like region at 96 h-2 000 mg/L in the mixed culture,and the fluorescence region of the solubilized microbial by-product-like products was added.Analysis of SUVA254,a measure of the degree of humification,showed that the mixed culture was three times higher than the pure culture,indicating a significant increase in the aromaticity of the transformed abiotic humic products compared to the mixed culture.This work revealed that abiotic humification and its biotransformation products were important control factors governing the standardized treatment of tannery wastewater.