A Pilot Study on Enhancing Nitrification by Bioaugmentation

Abstract:

Enhancing nitrification from municipal wastewater by bioaugmentation was investigated in a pilot plant operated in A²/O process. Reject water was used to cultivate nitrifier in O/A process (side stream), and the exceed sludge in side stream was used to bioaugmentation. The experimental results showed that bioaugmentation was very effective for enhancing nitrification. After nitrifier bioaugmentation, the NH₄⁺-N removal rate was improved more than 30% in main stream. And AUR and NUR of the activated sludge increased from 2.61 mgNH₄⁺-N /(gMLSS•h) and 2.38 mgNO₂^--N/(gMLSS•h) to 5.32 mgNH₄⁺-N /(gMLSS•h) and 3.81 mgNO₂^--N/(gMLSS•h), which was as 2.04 times and 1.60 times as those of before bioaugmentation in main stream respectively.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 569-574
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.569
• Online since: May 2012
• Authors: Qiong Wan, Lei Li, Dang Cong Peng
• Keywords: Bioaugmentation, Enhancing, Nitrification, Nitrifier, Pilot

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