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A Cascade of Anoxic and Oxic Fluidized Bed Biofilm Reactors for Treatment of Synthetic Municipal Wastewater

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In this study, a cascade of anoxic and oxic fluidized bed biofilm reactors system was carried out to treat synthetic municipal wastewater. The parameters of the influent flow rates and C/N ratios were discussed. System performance was acceptable for chemical oxygen demand (COD), ammonia, and total nitrogen removal. A decrease of ammonia and total nitrogen removal efficiencies, however, was observed when the influent flow rates increased to 5.04 and 6.12 l h−1. Total nitrogen removal decreased at the influent C/N ratio of 3:1. The measured ratios of COD reduction in the anoxic column to nitrogen removal through nitrification-denitrification were 3.7, 3.5, 3.3, and 3.1 g COD/g−1 N on average when the influent C/N ratios changed from 6:1 to 3:1. The observed sludge yield (Yobs ) was 0.169 g VSS g COD−1 because of perfect denitrification in the anoxic column and the relatively long solids retention time.
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Keywords: anoxic; fluidized bed biofilm reactor (FBBR); municipal wastewater; oxic; synthetic

Document Type: Research Article

Publication date: 2012-02-01

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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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