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Uranium extraction and regeneration of ion exchange resin generates concentrated nitrate effluents (typically 500 to 10,000 ppm NO3–N) that are highly alkaline in nature (pH 9.0 to 11.0). It is difficult to remove nitrate from such solutions using standard physiochemical and biological methods. This paper reports denitrification of such wastes using preadapted sludge (biomass), which was acclimatized...
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