Title :
Study on Biodegradation of Azo Dye by Thermophilic Anaerobic Process
Author :
Hu, Xiang ; Gao, Huan ; Zhang, Yao ; Zhou, Yue-xi ; Jiang, Jin-yuan
Author_Institution :
Dept. of Environ. Sci. & Eng., Beijing Univ. of Chem. Technol., Beijing, China
Abstract :
Biodegradation of Reactive Red 2(RR2) by anaerobic process UASB was investigated under thermophilic condition such as 55 plusmn 1degC. The quasi-steady state of the UASB reactor was achieved after 92 running days when the conditions were as follows: hydraulic retention time (HRT) 12 h, salinity 50000 mg/L, COD 1000 mg/L, RR2 100 mg /L. The removal efficiencies of COD and RR2 were about 20% and 92%, respectively. High performance liquid chromatography (HPLC) and gas chromatography-mass spectrometer (GC/MS) were used to inspect the products generating during the degradation process of RR2, and the mechanism of RR2 removal was also revealed. The reductive cleavage of the azo linkage, which resulted in dye decolourisation and production of aromatic amine was brought about by thermophilic salt-tolerant anaerobic granular sludge and then some aromatic amines degraded through hydrolysis or oxidation and released NH3.
Keywords :
biochemistry; biodegradable materials; chromatography; dyes; granular materials; mass spectroscopy; oxidation; sludge treatment; wastewater treatment; COD removal efficiency; aromatic amine; azo dye; azo linkage; biodegradation; dye decolourisation; gas chromatography; hydraulic retention time; hydrolysis; liquid chromatography; mass spectrometer; oxidation; reactive red 2; reductive cleavage; salinity; thermophilic anaerobic process; thermophilic salt-tolerant anaerobic granular sludge; time 12 h; time 92 day; upflow anaerobic sludge blanket reactor; Biodegradation; Chemical technology; Degradation; Effluents; Inductors; Microorganisms; Monitoring; Spectroscopy; Temperature; Wastewater treatment;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163461