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Process Kinetics of Upflow Anaerobic Sludge Bed Reactors Treating Inhibitory Substrate

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A kinetic model that accounts for the distributed fraction of methanogens (f) and granule-size distribution of upflow anaerobic sludge bed (UASB) reactors is proposed. In addition, the anaerobic degradation of phenol in four UASB reactors with various superficial flow velocity (us = 0.5, 1.0, 2.0, and 4.0 m/h) was performed to generate experimental data. When using the proposed kinetic model, the calculated residual concentrations of phenol, volatile fatty acids, and chemical oxygen demand are in fairly good agreement with the experimental data. With an increase in either us or volumetric loading, the granule size of the UASB reactor increases. The experimental f values decrease with an increase in volumetric loading; the f values in the lower and middle part of the sludge bed tend to be larger than those in the upper part of the sludge bed.
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Document Type: Research Article

Publication date: 01 January 2003

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    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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