Effect of Parameters on Anaerobic Digestion EGSB Reactor for Producing Biogas

Abstract

The effect of hydraulic and organic loading rate on the anaerobic digest EGSB (Expanded Granular Sludge Blanket) reactor for producing methane gas from starch wastewater was studied. The results show that, when the hydraulic loading rate of reactor is in the range of 1 - 4m/h and the influent concentration of CODCr is in the range of 5000 - 10000mg/L, the EGSB reactor can operate stably. Under the volumetric organic loading rate of 30 kg/ (m3•d), the removal rate of COD is over 80%. The granular sludge in the reactor has good settleability, the proportion of granular sludge in the bottom of reactor with particle diameter larger than 1.5mm accounted for more than 75%.