Acrobic night-soil treatment effluent containing high concentration of ammonia nitrogen was treated to remove nitrogen using Bardenpho process with Methanol addition. The objective of this study was to investigate the feasibility of complete nitrogen removal at three different HRTs such as 6.25d, 5d, and 3.75d, respectively. At each HRT, the nitrogen removal efficiencies are 92%,99% and 97% and the required amount of methanol are 3.05gMeOH/gN, 2.75GMeOH/gN, and 3.38gMeOH/gN, respectively. Specific nitrification rates are decreased proportional to HRT and are 0.022 gNH4+-N/g MLVSS · day, 0.0332 gNH4+-N/g MLVS · day and 0.051 gNH4+-N/g MLVSS · day and specific denitification rate are decreased propor-tional to HRT and are 0.0210g N/gMLVSS · day, 0.0330g N/gMLVSS · day dan 0.0525g N/gMLVSS · day, respectively.