A novel strategy for enhancing anaerobic biodegradation of an anthraquinone dye reactive blue 19 with resuscitation-promoting factors

Anaerobic process has been widely applied as a cost-effective method for textile wastewater treatment. However, many bacteria exhibit low metabolic activity in unfavorable conditions due to the entry into a viable but non-culturable (VBNC) state. Thus, in this study, a novel method of using resuscitationpromoting factors (Rpfs), which has been proven to resuscitate and stimulate the growth of VBNC bacteria, is explored to enhance the degradation of the anthraquinone dye reactive blue 19 (RB19) in the anaerobic process. The results show that Rpfs could efficiently prompt RB19 decolorization. Compared to the conventional anaerobic condition, RB19 decolorization efficiency was increased by more than 20% with the Rpf addition. UVevisible spectral and gas chromatograph-mass spectrometry analysis indicate that the aromatic amines structures of RB19 was cleaved. More importantly, the Rpf addition appeared to stimulate and/or enrich some dye-degrading species of the family Peptostreptococcaceae, thus leading to a higher RB19 decolorization efficiency. (C) 2020 Elsevier Ltd. All rights reserved.

Automated summary

The study explored a novel method of using resuscitation-promoting factors (Rpfs) to enhance the degradation efficiency of the dye RB19 in anaerobic processes. Results showed that Rpfs efficiently promoted RB19 decolorization, increasing decolorization efficiency by over 20%. Additionally, Rpfs appeared to stimulate and enrich dye-degrading species of the family Peptostreptococcaceae, leading to higher RB19 decolorization efficiency.