The operation performance of an improved self-agitated anaerobic baffled reactor with a fixed carrier was investigated by a continuous experiment of treating simulated food waste adjusted to a 5% total solid (TS) concentration. The objective of this study was to enhance methane fermentation and effluent water quality at 35 ℃. The effect of chemical oxygen demand measured by potassium dichromate (COD Cr ) loading rate on the treatment performance was evaluated by shortening the HRT from 50 days

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... o 10 days. As a result, the improved reactor was stably operated until the COD Cr loading rate increased to 9.56 kg m -3 d -1 . In addition, the improved reactor showed better organic removal efficiency and conversion ratio from the substrate than these the CSTR and self-agitated anaerobic baffled reactor without a fixed carrier.