Advantages of an anaerobic reactor for TMP wastewater with separated acidogenic and methanogenic stages

Abstract

The results of the anaerobic treatment of thermomechanical pulp (TMP) wastewater in one‐stage and two‐stage anaerobic processes are presented. The main content of the effluent are products from cellulose and hemicellulose hydrolysis. It was concluded that, for this kind of wastewater, the two‐stage process provides higher stability, greater COD removal and shorter start‐up time than the one‐stage process. In the two stage system loads about 11 KgCODm^‐3d^‐1 were reached with HRT of 21 hours and COD removal of 90%.

Keywords:

• Anaerobic treatment
• stage separation
• TMP wastewater
• UASB