Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
576152 | Journal of Hazardous Materials | 2015 | 9 Pages |
Abstract
The removal of organic compounds and nitrogen in an anaerobic-anoxic-aerobic membrane bioreactor process (A2O-MBR) for treatment of textile auxiliaries (TA) wastewater was investigated. The results show that the average effluent concentrations of chemical oxygen demand (COD), ammonium nitrogen (NH4+-N) and total nitrogen (TN) were about 119, 3 and 48Â mg/L under an internal recycle ratio of 1.5. The average removal efficiency of COD, NH4+-N and TN were 87%, 96% and 55%, respectively. Gas chromatograph-mass spectrometer analysis indicated that, although as much as 121 different types of organic compounds were present in the TA wastewater, only 20 kinds of refractory organic compounds were found in the MBR effluent, which could be used as indicators of effluents from this kind of industrial wastewater. Scanning electron microscopy analysis revealed that bacterial foulants were significant contributors to membrane fouling. An examination of foulants components by wavelength dispersive X-ray fluorescence showed that the combination of organic foulants and inorganic compounds enhanced the formation of gel layer and thus caused membrane fouling. The results will provide valuable information for optimizing the design and operation of wastewater treatment system in the textile industry.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Faqian Sun, Bin Sun, Jian Hu, Yangyang He, Weixiang Wu,