Abstract
ABSTRACT In this study, the anaerobic treatment and microbial characteristics of high-concentration corn alcohol wastewater were studied by using a self-designed anaerobic expanded granular sludge bed (EGSB) reactor at different conditions which is 30°C, 35°C and ambiance temperature. The anaerobic reactor was started and operated for 215 days. At a temperature of 35°C and an organic loading rateof 14.8 kg/(m3·day), the chemical oxygen demand removal rate reached 95.8%, the hydraulic retention time (HRT) was 1.4 days, the volumetric gas production rate reached 10.72 (m3/m3·day), and the average methane volume fraction reached 60.39%. After the experiment was completed, sludge granulation can be achieved in the anaerobic reactor, and the particle size reaches 2 mm to 4 mm. For the microbial community in the anaerobic reactor, Methanosaeta was the major archaea in the reactor granular sludge. EGSB is a highly efficient anaerobic reactor suitable for treating high-concentration corn alcohol wastewater.
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