Biofilm Formation and Phosphorus Removal in Two Stage Biological Filters by Alternative Aeration

Abstract:

In order to improve the biological oxidation and phosphorous removal in BAF, compound inoculation method was introduced to start two stage biological filters by alternative aeration. The two stage biological filters were connected by serial way, and three phases "batch aeration phase, the phase of small flow water for gradually increasing in the load, the alternative aeration phase" were adopted as the start up procedure. The experimental results showed that: COD removal rate was 83.3% after the former two stages; Ammonia nitrogen removal rate was stable at 81.5% while the TP removal efficiency was 68.9% and COD removal rate reached above 80% at the end of the third phase. Totally, 25 days were necessary for the biofilm formation in two stages BAF.

• Periodical: Applied Mechanics and Materials (Volumes 675-677)
• Pages: 501-504
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.675-677.501
• Online since: October 2014
• Authors: Cheng Jiang Sun, Li Ping Qiu*, Li Xin Zhang
• Keywords: Alternative Aeration, Biological Aerated Filter (BAF), Film Formation, Phosphorus Removal

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