Treatment of Refinery Wastewater with Isolated Biological Aerated Filters: A Pilot-Scale Study

Abstract:

A pilot scale biochemical treatment system containing three isolated biological aerated filters, one oil-separation pool and one secondary sedimentation tank was set up and used for high concentration organic waste water treatment. Effect of different operating conditions on Chemical Oxygen Demand (CODCr), sulphides, hydroxybenzene and oil degradation was investigated. And the ways of sulphides removal were also explored. While CODCr, the concentrations of sulphides, hydroxybenzene and oil in the waste water are no more than 1500 mg/L, 800 mg/L, 15 mg/L and 150mg/L, respectively, the system can run stably and the total removal of these pollutants is 88.8%, 98.8%, 96.8% and 91.0% accordingly though hydraulic retention time (HRT) varies from 7.95 hr to 15.90 hr and the air/water volume ratio (AWVR) varies from 12 to 8. Most of the sulphides are removed by Biodegradation with Isolated Biological Aerated Filters. Most of the pollutants are removed in the 1st BAF and about 96.5% by mean value of sulphides transforme into elemental sulfur and only about 2.7% by mean value of sulphides transforme into sulphates.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 2332-2341
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.2332
• Online since: December 2012
• Authors: Jian Guang Huang, Li Zhong, Wen Yu Xie
• Keywords: Biochemical Treatment, Biological Aerated Filter (BAF), Refinery Wastewater

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