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采用建立的“CSTRH-UASBMet”两相厌氧系统,以糖蜜废水为发酵底物,考察系统的产氢、产甲烷性能;为进一步去除有机物,同时建立好氧系统来处理两相厌氧系统出水;进水COD控制在4 000~10 000 mg/L。运行结果表明,CSTR产酸相最大产氢率为4.6m3/(m3·d),系统pH稳定在4.1~4.3;UASB产甲烷相最大产甲烷速率为10.5 m3/(m3·d),系统pH稳定在6.8~7.2。在最佳运行参数下,产氢反应体系经过混合酸型发酵、丁酸型发酵后,最终反应体系均达到稳定的乙醇型发酵。经好氧处理后,整个系统的COD去除率始终维持在95%以上。
Using the established “CSTRH-UASBMet” two-phase anaerobic system, using molasses wastewater as fermentation substrate, the hydrogen production and methanogenic performance of the system were investigated. In order to further remove organic compounds and establish an aerobic system to treat two-phase anaerobic System effluent; influent COD control 4 000 ~ 10 000 mg / L. The results show that the maximum hydrogen production rate of the acid phase of CSTR is 4.6m3 / (m3 · d), the pH of the system is between 4.1 and 4.3. The maximum methanogenic methane production rate of UASB is 10.5 m3 / (m3 · d) Stable at 6.8 ~ 7.2. Under the optimal operating parameters, the final hydrogenation reaction system reached a stable ethanol-type fermentation after mixed acid fermentation and butyric acid fermentation. After aerobic treatment, the entire system of COD removal rate has remained above 95%.