Open AccessEVALUATION OF A COUPLED SYSTEM USING A NANOMATERIAL Fe-DOPED TiO2 AND A SEQUENTIAL BATCH REACTOR (SBR) TO DEGRADE AZO DYES
Author(s) -
X. M. VARGAS,
J. M. MARIN,
G. RESTREPO
Publication year - 2016
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 23
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2016.331
Subject(s) - titanium dioxide , degradation (telecommunications) , photocatalysis , mineralization (soil science) , biodegradation , catalysis , bioreactor , sequencing batch reactor , batch reactor , doping , nuclear chemistry , chemistry , materials science , chemical engineering , waste management , organic chemistry , nitrogen , wastewater , composite material , optoelectronics , telecommunications , computer science , engineering
A coupled system comprising a photoreactor combined with a sequential batch bioreactor (SBR) was evaluated for the degradation of a Cibacron Yellow LS-R commercial dye. The photoreactor was evaluated by comparing synthesized 0.1% Fedoped TiO2 with titanium dioxide P-25. The photoreactor demonstrated satisfactory performance in color and DOC removal of 94.5% and 37.6%, respectively. These results were only slightly inferior to those obtained using the commercially available catalyst TiO2 P-25 over six hours of operation. The photoreactor increased the dye biodegradability from 0.1 to 0.47 over four hours of phototreatment with the synthesized 0.1% Fe-doped TiO2 photocatalyst. The coupled system completed the dye degradation in 34 hours, reaching a mineralization level of 70%, measured as COD. These results are remarkable, considering that the biological process as a single treatment did not lead to dye removal.