Analysis on Mass Balance and Optimization of Operating Performance in Anaerobic-Anoxic-Aerobic Oxidation Ditch Process

Abstract:

The equations of COD, nitrogen and phosphate mass balance is established and the results show that the COD, nitrogen and phosphorus balance ratios are 98.3%, 73.1%, 98.4%. COD removal is achieved by the discharge of aerobic oxidation and excess sludge, accounting for 86.3% of the total. The loss of nitrogen balance is due to the existing of SND. Nitrogen removal is mainly achieved by the discharge of denitrification process, including anoxic denitrification process (33.6%) and SND process (23.3%). In order to solve the problem of large energy consumption, some optimized control measures are proposed and the test results indicate that TN removal rate has increased from 89.2% to 93.1%, tons of water at power consumption has dropped from 0.35 to 0.26kW•h/m³.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 4864-4867
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.4864
• Online since: May 2011
• Authors: Zhi Zhang, Bo Lin Li, Chi Zhang, Hua Chai
• Keywords: Anaerobic-Anoxic-Aerobic, Chemical Oxygen Demand (COD), Mass Balance, Nitrogen, Phosphorus, Simultaneous Nitrification and Denitrification (SND)

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