期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 17, 页码 7692-7699出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.05.065
关键词
Membrane sequencing batch reactor; Hydraulic retention time; Petroleum refinery wastewater; Membrane fouling; Removal efficiency
资金
- National Iranian Oil Refining and Distribution Company
The use of membrane sequencing batch reactors, operated at HRT of 8, 16 and 24 h, was considered for the treatment of a synthetic petroleum wastewater. Increase in HRT resulted in statistically significant decrease in MISS. Removal efficiencies higher than 97% were found for the three model hydrocarbon pollutants at all HRTs, with air stripping making a small contribution to overall removal. Particle size distribution (PSD) and microscopic analysis showed reduction in the protozoan populations in the activated sludge with decreasing HRT. PSD analysis also showed a higher proportion of larger and smaller sized particles at the lowest HRT. The rate of membrane fouling was found to increase with decreasing HRT; SMP, especially carbohydrate SMP, and mixed liquor apparent viscosity also showed a pronounced increase with decreasing HRT, whereas the concentration of EPS and its components decreased. FTIR analysis identified organic compounds as the main component of membrane pore fouling. (C) 2011 Elsevier Ltd. All rights reserved.
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