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Heterotrophic nitrogen removal by Acinetobacter sp. Y1 isolated from coke plant wastewater by YuXiang Liu; Tingting Hu; Yujie Song; Hongping Chen; YongKang Lv is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Heterotrophic nitrogen removal by Acinetobacter sp. Y1 isolated from coke plant wastewater about?

A strain of Acinetobacter sp. Y1, which exhibited an amazing ability to remove ammonium, nitrite and nitrate, was isolated from the activated sludge of a coking wastewater treatment plant. The aim of this work was to study the ability, influence factors and possible pathway of nitrogen removal by Acinetobacter sp. Y1. Results showed that maximum removal rate of NH 4 D -N by the strain was 10.28 mg-N/L/h. Carbon source had significant influence on the growth and ammonium removal efficiencies of strain Y1. Pyruvate, citrate and acetate were favourable carbon sources for the strain. Temperature, pH value and shaking speed could affect the growth and nitrogen removal ability. Nitrate or nitrite could be used as a sole nitrogen source for the growth and removed efficiently by the strain. N 2 levels increased to 53.74%, 50.21% and 55.13% within 36 h when 100 mg/L NH 4 L -N was used as sole nitrogen source in the gas detection experiment. The activities of hydroxylamine oxidoreductase (HAO), nitrate reductase (NR) and nitrite reductase (NiR), which are key enzymes in heterotrophic nitrification and aerobic denitrification, were all detectable in the strain. Consequently, a possible pathwa

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Author

YuXiang Liu; Tingting Hu; Yujie Song; Hongping Chen; YongKang Lv

Publisher

Elsevier BV

Published

2015

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)