抄録
The purpose of this study is to improve the removal efficiency of phenol and ammonium nitrogen simultaneously and to improve stability of effluent quality by the addition of support media with and without adsorption capacity into the aeration tank of activated sludge system and by the fixed-bed system. Granular activated carbon (GAC) and granulated slug (GS) with particle size from 0.2 to 0.4mm were added into the aeration tank of activated sludge system. The support medium used in the fixed-bed reactor was ceramics with a size of 30mm. An activated sludge system with no support medium was operated as a control system. The fixed-bed system could remove phenol and NH4-N simultaneously since the activity of nitrification in the biofilm was high. Also, effluent phenol concentration during shock loading was kept low. In the activated sludge system added with GAC, effluent phenol concentration during shock loading was significantly smaller than those in the system added with GS and the control. The addition of GAC into the aeration tank enhanced phenol degradation activity. Adsorption of phenol on GAC might have contributed to the stable phenol removal during shock loading.
