Mineralization of reactive azo dyes present in simulated textile waste water using down flow microaerophilic fixed film bioreactor

作者：Balapure Kshama; Bhatt Nikhil; Madamwar Datta^*

来源：Bioresource Technology, 2015, 175: 1-7.

DOI：10.1016/j.biortech.2014.10.040

• Simulated textile wastewater
• Microaerophilic fixed film reactor
• Decolorization
• Organic loading rate
• Mineralization

The present research emphasizes on degradation of azo dyes from simulated textile wastewater using down flow microaerophilic fixed film reactor. Degradation of simulated textile wastewater (COD 7200 mg/L and dye concentration 300 mg/L) was studied in a microaerophilic fixed film reactor using pumice stone as a support material under varying hydraulic retention time (HRT) and organic loading rate (OLR). The intense metabolic activity of the inoculated bacterial consortium in the reactor led to 97.5% COD reduction and 99.5% decolorization of simulated wastewater operated under OLR of 7.2 kg COD m(3)/d and 24 h of HRT. FTIR, H-1 NMR and GC-MS studies revealed the formation of lower molecular weight aliphatic compounds under 24 h of HRT, leading to complete mineralization of simulated wastewater. The detection of oxido-reductive enzyme activities suggested the enzymatic reduction of azo bonds prior to mineralization. Toxicity studies indicated that microbial treatment favors detoxification of simulated wastewater.

• 出版日期2015-1