EGSB反应器处理高温木薯乙醇废水的性能

Performance of expanded granular anaerobic reactor in treating high temperature cassava ethanol wastewater

为研究厌氧膨胀颗粒污泥反应器在不同容积负荷下对高温木薯乙醇废水的处理效果,考察了有机物去除性能、产气性能、挥发性有机酸等参数的变化,并对微生物菌群进行分析。结果表明:综合考虑化学需氧量COD去除率和甲烷产生速率,COD容积负荷10.7 kg/(m^(3)·d)为最佳运行条件,在最佳容积负荷下,EGSB反应器的COD去除率和甲烷产生速率分别为(90.7±0.9)%和(3.02±0.12)L/(L·d);在高容积负荷19.3 kg/(m^(3)·d)条件下,产甲烷菌群相对丰富度的降低导致系统运行性能下降。EGSB反应器处理高温木薯乙醇废水是可行的。

This paper is aimed at investigating the treatment efficiency of high-temperature cassava ethanol wastewater using expanded granular anaerobic reactor under various organic loading rate.The investigation is performed into the changes in organic matter removal performance,gas production performance,volatile organic acid,and the microbial flora.The results reveal that,considering COD removal rate and methane production rate,COD volume loading of 10.7 kg/(m^(3)·d)is the optimum operation condition;under the optimal volume loading,EGSB reactor enables the COD removal rate and methane yield of(90.7±0.9)%and(3.02±0.12)L/(L·d),respectively;and under high OLR of 19.3 kg/(m^(3)·d),the decrease of relative abundance of methanogens is responsible for the decrease of system performance.