Studies on Anoxic Aerobic Alternate Frequency of Oxidation Ditch for Removing Nitrogen and Phosphorus

Abstract:

Biological removal of nitrogen and phosphorus species from an artificial wastewater was investigated in a sequencing batch reactor ( SBR) by changing operating mode which simulation oxidation ditch aeration realization of point and achieved alternate anoxic/aerobic, The results show that: the total control for 6 h reaction time, including aeration 3 h, stop aeration 3 h, four conditions under the condition of 30 min, 10 min, 5 min, 3 min anoxic/ aerobic alternate of COD, ammonia nitrogen removal not too big effect, TN, TP influence is bigger. COD removal efficiency is above 89% for four modes and effluent COD is lower than 35mg/L.Ammonia nitrogen average removal efficiency is above 90% for four modes and effluent ammonia is less than 5mg/L.Total nitrogen removal rates was 68.71%, 67.70%, 60.36%, 37.27% respectively for four modes. In instantaneous influent, anoxic and aerobic alternating time should not be less than 5min for TN removal. Mode Ⅰto Ⅳ removal efficiency of TP was 23.05%, -2.17%, 1.19%, 43.61% respectively.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 1573-1578
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.1573
• Online since: December 2012
• Authors: Yu Hong Zhou*
• Keywords: Alternating Anoxic/ Aerobic, Biological Removal of Nitrogen and Phosphorus, Oxidation Ditch

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