The effect of temperature variations on the performance of mesophilic and thermophilic anaerobic filters treating a simulated papermill wastewater

摘要

A study was carried out to assess the effect of temperature variations, both decreasing and increasing, on the performance of a mesophilic (35 deg. C) and a thermophilic (55 deg. C) upflow anaerobic filter treating a simulated papermil wastewater. An organic loading rate of 1.95 kg COD per m~3 day was used throughout the study. The temperature of the mesophilic digester (MD) was lowered to room temperature (18-24 deg. C) for 11 days and then returned to 35 deg. C. The temperature of the thermophilic digester (TD) was lowered to 45 deg. C for the 11 days followed by a further decrease to 35 deg. C for 6 days.