摘要：
研究了两级上流式厌氧污泥床(Up-flow Anaerobic Sludge Bed,UASB)反应器处理糖蜜酒精废水的效果.进水COD负荷为28 kg/(m3·d)时,污泥中微生物活性受到一定抑制,反应器运行效果变差,但仍能稳定运行.糖蜜酒精废水经稀释后进入一级UASB反应器,一级厌氧出水直接作为二级UASB反应器的进水.试验结果表明,经过两级厌氧消化,废水的COD和硫酸根总去除率分别稳定在65％和88％左右,二级厌氧出水COD浓度为9 000 mg/L左右,硫酸根浓度为300 mg/L.一级厌氧处理对COD和硫酸根的去除贡献较大,去除率分别为45％和70％左右,产气效果也较好,日产气量达到35 L左右,甲烷含量70％左右.出水硫化物浓度随进水硫酸根浓度增加而升高,最终一级厌氧出水达到568.8 mg/L,二级厌氧出水达到720mg/L.MPB电子流所占比重随进水COD负荷提升而增大,最大为85.8％.%The effect of molasses alcohol waste water treatment by two-stage upflow anaerobic sludge bed (UASB) reactor was investigated in this study.When the influent COD loading rate was 28 kg/(m3 · d),the activity of microorganisms in sewage sludge was inhibited,the performance of the reactor became poor still work stably.The diluted molasses alcohol waste water was entered into the first stage UASB reactor and the effluent was directly used as the influent for the second UASB reactor.The results showed that after two stages of anaerobic digestion,the total removal rates of COD and sulfate in waste water were kept at about 65％ and 88％,respectively.The effluent concentration of COD in second anaerobic digestion was about 9 000 mg/L,and the concentration of sulfate was about 300 mg/L.The contribution of the removal rate of sulfate and COD in the first anaerobic reactor was more than the second reactor,which were about 45％ and 70％,respectively.The biogas generation showed a good performance,the daily biogas yield reached about 35 L and methane content was about 70％.The effluent concentration of sulfide increased with the increase of influent concentration of sulfate.Finally,the effluent concentration of sulfide in the first reactor reached 568.8 mg/L,and the effluent concentration of sulfide in the second reactor was 720 mg/L.The proportion of MPB electron flow increased with the increase of COD loading rate,and the maximum value reached 85.8％.
