期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 89, 期 7, 页码 1044-1050出版社
WILEY
DOI: 10.1002/jctb.4199
关键词
fixed-structured bed; sulfate reduction; organic matter removal; COD/sulfate ratio; kinetic parameters
类别
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Brazil [2007/07.574-1, 2010/18.463-9, 2009/15.984-0]
BACKGROUND: The anaerobic treatment of wastewaters is usually applied to remove the organic matter, converting it into methane. The presence of sulfate in some wastewaters produces sulphide during anaerobic biological processing, which is known as an inhibitor of biological processes. In this study, a novel anaerobic bioreactor with a fixed structured bed (ABFSB) was subjected to simultaneous sulfate reduction and organic matter removal. RESULTS: Synthetic wastewater was used as organic substrate and the bioreactor performance was studied with different COD/[SO42-] ratios: 0.72, 1.7, 3.5 and 6.1. The highest COD and sulfate removal efficiencies were achieved at a COD/[SO42-] ratio of 1.7 (82 and 89%, respectively). Also, in this condition a greater overall kinetic apparent parameter (0.96 h(-1)) was observed. The kinetic parameters indicate that the sulfate reducing bacteria played an important role in the organic matter removal process over a range of COD/[SO42-] ratios from 6.1 to 1.7. CONCLUSIONS: Concerning the organic matter removal, the best synergy between sulfate reduction bacteria andmetanogenic archaea communities was achieved in COD/[SO42-] similar to 1.7. The ABSFB was suitable for the simultaneous organic matter and sulfate removal, especially when the COD/[SO42-] ratiowas1.7, but demonstrating a stable and efficient process in all conditions studied. (C) 2013 Society of Chemical Industry
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