A Pilot Study on the Volume Ratio of Anaerobic / Anoxic / Aerobic in A²/O Process Influence on Nitrogen and Phosphorus Removal

Abstract:

The volume ratio of anaerobic/anoxic/aerobic was an important factor for the removal of nitrogen and phosphorus in the A²/O process. A pilot plant of A²/O process was built in Xi’an to do the research about the influence on nitrogen and phosphorus removal when the volume ratio of anaerobic/anoxic/aerobic was changed. When the HRT was 10.1h and the volume rate of anaerobic/anoxic/aerobic was 1/1.7/2.4, the removal rate of COD didn’t raise substantially than that of normal volume ratio A²/O process, the removal rate average value of TN and phosphorus were 61.5% and 85.4% respectively. On this condition, the HRT in aerobic zone shorted to 4.7h, energy was saved about 33.8% in comparing with that of conventional volume ratio A²/O process.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 2980-2985
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.2980
• Online since: May 2012
• Authors: Qiong Wan, Qian Feng, Dang Cong Peng, Shi Ping Jing
• Keywords: A²/O Process, Nitrogen Removal, Phosphorus Removal, Pilot, Volume Ratio

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