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The aim of this project is to study mass balance of TP, TN and TCOD in enhanced biological phosphorous removal (EBPR). Anaerobic-anoxic-aerobic conditions were combined in the EBPR. This study used acetic acid as carbon source for synthetic wastewater through 20 days SRT with 1.20, 1.16 and 23.88 g/d of TP, TN and TCOD, respectively. The amount of TP, TN and TCOD in effluent were reduced to be 0.49, 8.10 x 10-2 and 0.59 g/d, respectively. Generally, the EBPR resulted TP, TN and TCOD removal as much as 53.26±14.13, 98.67±1.04 and 99.20±1.02 %, respectively. Nevertheless, phosphorus removal efficiency was low. This may be due to low SRT period. Furthermore, control of phosphorus accumulating organisms (PAOs) plays an important role in the system because the amount of PAOs affects the efficiency of phosphorus removal. However, this result can be used as a guide to customize nutrient flow into EBPR system and into municipal wastewater treatment system.
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