A study of the integrated EHBR system was conducted to investigate the performance of the system for treatment of pharmaceutical wastewater over 3 years. After 3 years of operation, the integrated EHBR system presented excellent ability of COD removal and notable impact resistance. The hydrolysis/acidification process could remove 7.2% of COD, 38.6% of TN and 9.5% of TP. And the removal efficiencies of COD, NH_4~+-N, TN, TP and SS in EHBR process were 85.5%, 96.2%, 71.1%, 72.5% and 81.1% respectively. After post-processingwith activated carbon adsorption, the effluent of integrated treatment EHBR system kept stable with COD below 200 mg/L, NH_4~+-N below 5 mg/L and TP below 3 mg/L.The integrated EHBR system could effectively and stably treat the high-loading mixed pharmaceutical wastewater from the high-tech pharmaceutical R&D building in Tianjincity of China, and the effluent quality could meet the wastewater discharge standard.
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