New direction in biological nitrogen removal from industrial nitrate wastewater via anammox

Applied Microbiology and Biotechnology
Shenbin Cao, Yan Zhou

Abstract

Anaerobic ammonium oxidation (anammox) is an important scientific discovery in the field of wastewater treatment. This process is a sustainable option in nitrogen removal due to its energy-efficient and cost-effective advantage. Great effort has been made recently to remove ammonium from industrial and municipal wastewater via the anammox process with a preceding partial nitrification (PN) converting part of NH4+ to NO2-. Anammox process is seldom involved in the nitrate removal. Nitrate (NO3-), one of the main nitrogen compounds produced from various industries, is typically converted to nitrogen gas via denitrification process where a large amount of carbon source is consumed. Within this context, we reviewed the current technologies for high-strength nitrate wastewater treatment. It is found that nitrite accumulation often occurs during nitrate reduction, and its accumulating level would be increased at certain conditions (i.e., low C/N ratio and high pH). Hence, this provides a great opportunity to employ the anammox process to further convert nitrite in a more sustainable way. In this review, we highlight a new approach for industrial nitrate wastewater treatment via partial denitrification coupled with anammox process (PD...Continue Reading

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Citations

Dec 29, 2020·The Science of the Total Environment·Shan ZhaoLeimin Yang

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Methods Mentioned

BETA
chemical treatment

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