AI Article Synopsis
- * The study tested the use of anthraquinone-2-sulfonate (AQS) immobilized on biochar in two different reactors, leading to high decolorization rates of azo dyes after 175 days of operation.
- * Reactor 1, using the novel carrier, showed better stability and more favorable microbial interactions compared to Reactor 2, highlighting a promising approach for enhancing azo dye biotransformation in wastewater treatment.
Article Abstract
Azo dyes are significant organic pollutants known for their adverse effects on humans and aquatic life. In this study, anthraquinone-2-sulfonate (AQS) immobilized on biochar (BC) was employed as a novel carrier in up-flow anaerobic fixed-bed reactors to induce specific biofilm formation and promote the biotransformation efficiency of azo dyes. Novel carrier-packed reactor 1 (R1) and BC-packed reactor 2 (R2) were used to treat red reactive 2 (RR2) under continuous operation for 175 days. The decolorization rates of R1 and R2 were 96-83% and 91-73%, respectively. The physicochemical characteristics and extracellular polymeric substances (EPS) of the biofilm revealed a more stable structure in R1. Furthermore, the microbial community in R1 interacted more closely with each other and contained more keystone genera. Overall, this study provides a feasible method for improving the biotransformation of azo dyes, thus providing support for practical applications in wastewater treatment projects.
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| http://dx.doi.org/10.1016/j.biortech.2023.129013 | DOI Listing |
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