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Effect of carbon source and nitrate concentration on denitrification of high-nitrate wastewater

Horová Dorota, Bezucha Petr, Růžičková Iveta

Environment Protection Engineering

2020

Vol. 46, nr 1

73--89

The aim of the present work was to study the applicability of the activated sludge from a municipal wastewater treatment plant for high strength nitrate denitrification process. A sequenced batch reactor operated at initial nitrate concentration in the range from 750 to 8500 mg NO−3 -N/dm3 .The effectiveness of various carbon sources on denitrification rate and nitrite accumulation was studied. The average specific denitrification rate was in the range from 58 to 62 mg NO−3 -N /(g VSS·h) for ethanol, glycerol, molasses and whey. The denitrification with methanol was not effective.