期刊
JOURNAL OF ENVIRONMENTAL MANAGEMENT
卷 121, 期 -, 页码 179-190出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2013.02.016
关键词
Pilot granular activated carbon sequencing; batch biofilm reactor (GAC-SBBR); Recycled paper wastewater treatment; Adsorbable organic halides (AOX); 2,4-dichlorophenol (2,4-DCP); Response surface methodology (RSM)
资金
- Swedish International Development Agency (SIDA-ARRPET II Programme)
- UKM [UKM-KK-02-FRGS 0003-2006, UKM-HEJIM-Industri-20-2010]
In this study, the potential of a pilot-scale granular activated carbon sequencing batch biofilm reactor (GAC-SBBR) for removing chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N) and 2,4-dichlorophenol (2,4-DCP) from recycled paper wastewater was assessed. For this purpose, the response surface methodology (RSM) was employed, using a central composite face-centred design (CCFD), to optimise three of the most important operating variables, i.e., hydraulic retention time (HRT), aeration rate (AR) and influent feed concentration (IFC), in the pilot-scale GAC-SBBR process for recycled paper waste-water treatment. Quadratic models were developed for the response variables, i.e., COD, NH3-N and 2,4-DCP removal, based on the high value (>0.9) of the coefficient of determination (R-2) obtained from the analysis of variance (ANOVA). The optimal conditions were established at 750 mg COD/L IFC, 3.2 m(3)/min AR and 1 day HRT, corresponding to predicted COD, NH3-N and 2,4-DCP removal percentages of 94.8, 100 and 80.9%, respectively. (C) 2013 Elsevier Ltd. All rights reserved.
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