Abstract
Based on a self-regulating mesophilic anaerobic reactor, we did a mesophilic anaerobic ferment test on rehmannia residue. This experiment systematically investigated the amount change of the methane production as the anaerobic reaction time changes. We concluded the proliferation regularity of beneficial anaerobic bacteria flora through accumulative methane production during the zero-order reaction period of anaerobic ferment. The results show that based on the mesophilic reaction temperature which is 37±1°C, when the feeding cycle is 7 days, after the 56 days continuous operation, the