生物降解
微生物联合体
耐盐性
化学需氧量
流出物
无氧运动
盐度
拟杆菌
化学
生物修复
蛋白质细菌
环境化学
挥发性悬浮物
制浆造纸工业
废水
环境工程
环境科学
16S核糖体RNA
微生物
生态学
生物
细菌
污染
生物化学
遗传学
有机化学
生理学
工程类
基因
作者
Samson Tizazu,Getaneh Tesfaye,Berhanu Andualem,Aijie Wang,Awoke Guadie
标识
DOI:10.1016/j.jenvman.2022.116235
摘要
Wastewaters in textile industry are mainly characterized by higher pH, color, salt and chemical oxygen demand (COD) values, which are environmentally undesirable. Among these textile effluent characteristics, color removal is the most challenging task. In this study, the potential of Rift Valley halotolerant and thermo-alkaliphilic microbial consortia (collected from Shala hot spring located in Ethiopia) for azo dye biodegradation under anaerobic-aerobic conditions were evaluated. Optimization and microbial diversity analysis were done using Reactive Red 141. Under optimum conditions of pH (9), temperature (55 °C), salinity (0.5%), and nutrients, microbial consortia can remove >98% color and 92.7 ± 7.3% COD under anaerobic and aerobic conditions, respectively. In addition, the consortia was capable of decolorizing initial dye concentrations of 100-1000 mg/L, and various dye types including Everzol Blue LX, RY 84, RR 239, RB 198 and RY 700. The 16S rRNA gene sequence results showed that Bacteroidetes (25.3%) > Proteobacteria (21.0%) > Chloroflexi (18.5%) > Halobacterota (6.2%) dominant phyla. Based on the findings, non-color effluent adapted Rift Valley halotolerant and thermo-alkaliphilic bacterial consortia can be a potential candidate for bioremediation of textile and other industries characterized by higher salinity, temperature and pH.
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