| Abstract |
| The objective of this research was to investigate the configuration condition and the characteristics of the filter media packed into biological-film(biofi1m) reactor on an advanced wastewater treatment to remove nitrogen and phosphorus. For this research, the experiment of pilot-scale plant was carried out at real wastewater treatment plant and used the effluent of preliminary clarifier as raw wastewater. Used packed media into the biofilm reactor were global ceramic, honeycomb panel, fibrous panel, and rotating disc. The biofilm process consists of anaerobic and aerobic zones. Based on the results of this research, at volumetric loadings of 0.060-0.420 kgCOD/㎥·d, 0.080-0.141kg T-N/㎥·d, and 0.015-0.022kg T-P/㎥·d, the substrate residual ratio(C/Co) of the global ceramic media biofilm were 0.28-0.26 of COD, 0.38-0.34 of T-N, and 0.30-0.29 of T-P, the C/Co of the fibrous panel media biofilm 0.24-0.23 of COD, 0.55-0.50 of T-N, and 0.37-0.35 of T-P, the C/Co of the honeycomb panel media biofilm 0.73-0.68 of T-N, 0.48-0.52 of T-P, and the C/Co of the rotating disc media biofilm 0.30-0.28 of COD, 0.59-0.57 of T-N, and 0.43-0.41 of T-P, respectively. The C/Co of the global ceramic media biofilm were lower than that of other media, which was resulted in attaching more much biomass on the surface of the media having more wide specific area than the other media. The backwashing frequency of the ceramic media biofilm bed was 5 times shorter than that of the other biofilm beds with 5-6 days/backwash of the fibrous media and 10-15 days/backwash of the honeycomb media. Compared to the C/Co of global media biofilm, the one of the panel media biofilm were higher that indicate to have to improve the contacting efficiency of substrate and the biomas attached on the surface of the media. |
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| Key Words |
| biofilm, filter media, volumetric loadings, substrate residual ratio(C/Co), specific area, backwashing frequency |
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