Two-stage anaerobic process treating high concentration methanol wastewater and
نویسندگان
چکیده
In our study, two-stage anaerobic system was employed to treat high concentration methanol wastewater. The results showed the COD removal efficiency was over 90% at the volume loading of 26.8kgCOD/(m.d) and two-stage anaerobic digestion of methanol wastewater was more efficient and stabler than one stage. The pH of the two UASBs was always lower than 6.0, which wasn’t the suitable condition that common methanogenic bacteria could exert its degradability. Obviously, the methanogenic bacteria of the system had some acid resistance. Static experiments were conducted to investigate it. It was found that methanogenic bacteria, viz. Methanosarcina barkeri, could still live and degraded organic matter at pH5.0. If trained further, their acid resistance would be improved somewhat.
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