摘要
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10.5m3/（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.
A two-phase anaerobic digestion ＂CSTRH-UASBMet＂-aerobic system was established to treat molasses wastewater.The performance of hydrogen-methane production was investigated,and aerobic reactor accomplished residual COD removal.When COD concentration was from 4 000 to 10 000 mg/L,the highest hydrogen production rate of 4.6 m3/（m3 · d） was obtained from molasses wastewater and methane was continuously produced from effluents of hydrogen fermentation with a production rate of 10.5 m3/（m3 · d）.Under the optimum operating parameters,the fermentation type of the simultaneous production of hydrogen was gradually butyrate-type fermentation,mixed acid fermentation and the reaction system set up stable ethanol-type fermentation finally.The effluent pH value of acidogenic phase and methanogenic phase were separately kept in 4.1-4.3 and 6.8-7.2.COD removal efficiency can be maintained above 95% at last.
出处
《安徽农业科学》
CAS
2013年第30期12118-12120,12124,共4页
Journal of Anhui Agricultural Sciences
基金
黑龙江省自然科学基金(E201354)
关键词
糖蜜废水
氢气
甲烷
COD去除率
Molasses wastewater
Hydrogen
Methane
COD removal efficiency
