Effect of hydraulic retention time and influent substrate concentration on nutrient removal and membrane fouling in an anoxic/anaerobic-aerobic MBR
نویسنده
چکیده
In this study, effects of organic loading rates on biological nutrient removal and in an MBR based nutrient removal system were investigated. Furthermore, trans-membrane pressure at different applied conditions was monitored to observe impact on membrane fouling Three different levels of CODinf and three HRTs (4, 5 & 8 hrs) were applied. An improved performance with 74 % & 89% of TN & TP removal respectively was observed when the SAM was fed with high CODinf. When the MBR based BNR process was operated at relatively higher influent COD and at short HRT, efficient TN and TP removal efficiencies were observed at stable TMP variation throughout the test. The membrane fouling was accelerated at short HRT but suppressed when concentration of CODinf was increased. The optimum specific organic loading rate was found to be 0.3 kg COD·kg -1 MLVSS·day for the MBR based BNR system.
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