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Treatment of Heavy Oil Wastewater with Two Stages DAF Combined with ASP and I-BF Process - A Field Pilot Test

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Abstract:

A field pilot test was constructed on a two stage Dissolved Air Floatation (DAF) combined with Activated Sludge Process (ASP) and Immobilized microorganism biological filter (I-BF) has been constructed in Liaohe oilfield, China to treat heavy oil wastewater with large amounts of dissolved recalcitrant organic compounds and low nutrient of nitrogen and phosphorus. By operating the system for 185 days, chemical oxygen demand (COD) removal rates were 67.9 % and 88.4 % in DAF and I-BF effluents, respectively. Environment Scanning electron microscope (ESEM) showed that large quantity of filamentous microorganisms was immobilized on carriers without causing foaming or bulking. This integrated system appeared to be a useful option for the treatment of heavy oil wastewater in Liaohe oil field.

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Periodical:

Advanced Materials Research (Volumes 518-523)

Pages:

2950-2955

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.518-523.2950

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Online since:

May 2012

Authors:

Kun Tong, Yi He Zhang, Jia Cai Xie, Qi Hui Song

Keywords:

ASP, DAF, ESEM, Heavy Oil Wastewater, I-BF

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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