期刊
DESALINATION
卷 286, 期 -, 页码 394-399出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2011.11.055
关键词
Textile wastewater treatment; Water reuse; Fenton treatment; SBR; Aerobic plus Fenton treatment; Escherichia coli removal
资金
- Ministry of Industry, Tourism and Trade [DEX-560510-2008-31]
- LEITAT Technological Center facilities in Terrassa (Catalonia, Spain)
Both Fenton oxidation and the combination of aerobic Sequencing Batch Reactor (SBR) + Fenton oxidation were investigated in a bench-scale study to degrade and reuse a real textile wastewater with a TOC = 465 mg L-1 C, COD = 2100 mg L-1 O-2 and Escherichia coli = 80,000 CFU mL(-1), according to RD 1620/2007 (Spanish Normative for wastewater reclamation and reuse). The independent variables considered for the optimization of the oxidative process were temperature, H2O2 and Fe (II) concentrations. Under the best stand-alone Fenton operating conditions: T = 25 degrees C, pH = 3; [H2O2] = 1650 mg L-1 and [Fe (II)]= 216 mg L-1, we achieved 64% TOC reduction and >99% E. coli removal. However, the best results were obtained when applying Fenton process with [H2O2] = 1518 mg L-1 and [Fe (II) = 66.5 mg L-1, as a biological polishing step. The aerobic biological treatment was conducted using a SBR with 1 day HRT. In this case 92% TOC and >99% E. coli removal were accomplished. The obtained results showed the feasibility of both processes to achieve suitable water qualities for internal reuse, according to RD 1620/2007. (C) 2011 Elsevier B.V. All rights reserved.
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