Abstract:  Batch studies on the nitrification process using biological porcelain granule under different alkalinity‚temperature and P／N ratio（in mass） were performed．The results show that increasing the alkalinity in certain range is favorable for ammonium oxidation and NO －2 -N accumulation．Moreover‚the appropriate mass ratio of NH ＋ 4 -N to NaH-CO 3 is1／12～1／16．Temperature has important influence on NO －2 -N accumulation．When temperature is below32℃‚NO －2 -N decreases markedly whereas NO － 3 -accumulates．The nitrosomonas and nitrobacteria will be inhibited and the rate of nitrification will decrease in38℃．The maximal accumulation of NO －2 -N could reach89．94％ of theNH ＋4 -N added at the beginning of the process in36℃‚this suggests that36℃ is the most favorable temperature for the accumulation of NO －2 -N．The nitrification process in three P／N ratios‚i．e．0‚1／10and1／5was studied．It shows that the average oxidation rate of ammonium‚the accumulation rat when P／N ratio increases．This implies that a negative correlativity is between them．Thus‚to make the nitrification process well perform‚P／N ratio should be controlled under1／10．

Key words:  fenton-type catalyst, hydrogen peroxide, catalytic wet oxidation, phenol