Studied on chloronitrobenzene manufacture wastewater treatment with sequential anaerobic-aerobic process: Characteristics of start-up process
氯代硝基苯类生产废水厌氧-好氧序列生物处理研究Ⅰ. 反应器起动过程的特性

The characteristics of start-up process of sequential anaerobic and a e robic bioreactors for treatment of chloronitrobenzene manufacture wastewater wer e studied in this paper The results showed that nitrobenzenes or anilines - d eg rading anaerobic and aerobic sludge with higher activity were acclimated and enr iched when a mixture of chloronitrobenzenes or manufacture wastewater and simula ted organic wastewater was employed as influent of sequential bioreactors, and c hloronitrobenzenes concentration was gradually improved Biotransformation and d egradation of nitrobenzenes and anilines were simultaneously observed in anaerob ic stage The sequential anaerobic - aerobic system was operated with influent C OD <600 mg/L and HRT 44h ( A 20-24 h, O22 h), COD, nitrobenzenes (NAC) and a nili nes (AAC) concentration in effluent met to secondary level discharge standard of GB 8978-1996, more than 68% of COD, 97% of anilines and 99 9% of nitrobenzene s were removed.GC-MS analytic results also indicated p -chloronitrobenzene and m - chloronitrobenzene were effectively transformed In conclusion, the sequential a naerobic - aerobic system was an efficient process for treatment of chloronitro benzene manufacture wastewater