Biodegradation characteristics of high-salinity complex dyes wastewater with high salinity by the bacterial consortium
LI Jin-jia, FAN Xiao-dan, ZHANG Dao-hong, YUAN Zheng-tong, ZHOU Jia-ying, WANG Xue-qi
Tianjin Key Laboratory of Water Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
Abstract：In this study, a bacterial consortium was isolated from municipal activated sludge from Tianjin, China. Identification via 16SrDNA sequencing showed that it was mainly consisted of Dokdonella (12.26%), Dyella (10.19%), Sacharibacteria genera (7.07%), Rhodobacter (5.80%), Pseudodoxanthomonas (3.61%), and Flavihumibacter (3.02%). The decolorization conditions of high-salinity complex dyes wastewater, such as co-metabolic substrates as well as various physical and chemical parameters, were studied. The results showed that the best co-metabolic substations for the decolorization of complex dyes wastewater were glucose and ammonium sulfate. The optimum decolorization conditions were 35℃, pH 9.0, and inoculum concentration of 1.2g/L. Under the condition of high salinity (50g/L), the decolorization efficiency of complex dyes wastewater reached (87±2.4) % within 72h. Methyl orange was degraded first, followed by disperse blue, while acid fuchsin had a slow degradation rate. The chromophore groups (-N=N-, -NH2, and -SO3) and the benzene rings of complex dyes were destroyed, as identified with by high performance liquid chromatography and Fourier transform infrared spectroscopy. Degradation metabolites included aniline, acetamide, and 2-amino-5-methylbenzoic acid as identified by gas chromatography mass spectrometry.
李进家, 范晓丹, 张道虹, 袁正通, 周佳滢, 王雪琦. 高盐度复杂染料废水脱色菌群的降解特性[J]. 中国环境科学, 2021, 41(6): 2631-2638.
LI Jin-jia, FAN Xiao-dan, ZHANG Dao-hong, YUAN Zheng-tong, ZHOU Jia-ying, WANG Xue-qi. Biodegradation characteristics of high-salinity complex dyes wastewater with high salinity by the bacterial consortium. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(6): 2631-2638.
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