| The composition of the penicillin wastewater is complicated, includes a great deal of matters that are hard to degrade by microbe or even repress the activities of the microbe. Since the conventional treatment processes need large investment, have low-efficiency and are difficult to steadily reach the discharge standards. In the paper, the process of "hydrolytic acidification - MBR" was put forward on the basis of the overall analysis of the penicillin wastewater quality, and a set of laboratory experiment equipments was built up.Through the hydrolytic acidification experiments on the penicillin wastewater, it could be found that the total organic acid rate is up to 10%, the CODcr removal rate is about 25%, and the biodegradability of this wastewater improve greatly (BOD5/CODcr increase from 0.31 to 0.40 or so), with different dilute proportion ,when the HRT is about 6 h～10 h.On the research of the treatment processes of the penicillin wastewater with MBR, the operation load of MBR reach 6 kg/m2.d～8 kg/m3.d, the removal rate of CODcr reach about 90%,the CODcr and total nitrogen removal rate of the whole system reach about 90% and 60%. The research has determined the optimized craft parameters of the MBR, among which the SRT is 20d, the HRT is 10 h～12 h, the MLSS is about 8g/L～12g～L.The conclusion of the research could supply related operational parameter and method for practicality application of the "hydrolytic acidification -MBR".
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