| Abstract |
| This study was performed to investigate the influence of influent organic loading rate (OLR) and filtration velocity CR`) on biofilter and bioreactor performance as well as biofilm growth and granule formation of sludge. Influent concentration were in the range of <700 mg COD/L, <35 mg T-N/L. and <3.7mgT-P/L. Biofilter was packed with ceramic ball (CB) and polyethylene cube (PC) as filter media. Applied filtration velocity and HRT for biofilter and bioreactor was <400 m/d and < 3h. The substrate residual ratio of the biofilter and the bioreactor increased linearly and exponentionally with increasing R/ and HRT. The substrate reduction of the biof liter decreased considerably at FV >l00m/d. At the OLR of 0.038 kg COD/m3.d, 2.90gTN/m3.d, and 0.536 QTP/m3.d, the substrate residual ratio of the biofilter and the bioreactor increased logarithmically and linearly with increasing OLR. The substrate residual ratio of <0.4 in the biofilter and the bioreactor were achieved at about <0.03 and <0.015 kg/m3.d for COD, <2.5 and <1.0 g/m3.d for T-N, and <0.3 and <0.1 g/m3.d for T-P, respectively. The bioreactor using granular sludge is more appropriate for the treatment of the wastewater with high organic concentration compared to the biofilter. |
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| Key Words |
| Biofilter, bioreactor, biofilm, granular sludge, filtration velocity, HRT, substrate removal, influent organic load |
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