Molasses wastewater treatment with an internal circulation(IC)reactor
内循环(IC)厌氧反应器处理糖蜜酒精废水的研究

The difficulty in treating molasses wastewater is due to the high COD concentration of the wastewater which contains a large amount of sulfates. This paper mainly focuses on the practical performance of the IC reactor treating molasses wastewater. The removal of COD and sulfate and the production of biogas were studied in the experiment. The result shows that IC reactor presents a good performance of treating medium/high COD concentration wastewater(5000 to 10 000 mg/L). When the COD concentration goes up to 20 000 mg/L, or even higher to 30 000 mg/L, the IC reactor could still keep the COD removal efficiency above 90% when operated for one or two HRT. The maximum volume loading adopted in this trail is increased to around 40 kg COD/m3·d. The concentration of sulfate in the adopted molasses alcohol slops, around 61.9 COD/SO2-4, there is no obvious influence on the performance of the reactor caused by sulfate.