中文摘要：

针对微生物烟气脱硫工艺的工业应用问题,设计了升流式厌氧污泥床和内循环生物流化床串联反应器并用于烟气碱吸收预处理废水的生物转化,考察了进水负荷波动、设备应急停运等非稳态工况对反应器性能的影响,研究了脱硫产物的特性。结果表明：串联反应器连续稳定运行30天,系统负荷达5.8 kgCOD m3d1和1.8 kgSO42-m3d1,平均SO42去除效率、有机物去除效率和最高单质硫产率分别为92%、90%和76%;串联体系具有良好的抗负荷冲击能力;系统停运26天,8天内恢复性能。说明系统能满足实际运行中间歇操作和负荷适当波动情况。脱硫产物主要由单质硫组成,还含有少量蛋白质、SO42、Cl、S2、SO32和Na＋等水溶性组分,是一种不同于普通硫磺的生物硫磺。

英文摘要：

Targeting the problems with the application of biological flue gas desulfurization process, an up-flow anaerobic sludge blanket （UASB） reactor and an internal circulating bio-fluidized bed （ICBFB） reactor were designed and connected in series to conduct the bioconversion of wastewater from flue gas alkali-absorption pre-treatment. The effects of changeable loading rate of influent wastewater and emergency shutdown on bioreactors performance were discussed. The characteristics of desulfurization product were researched. The reactors operated continuously and stably for 30 days. The loading rate reached over 5.8 kgCOD.m-3.d-1 and 1.8 kgSO_4^2-.m-3.d-1. The average removal efticiencies of sulfate and organics were about 92% and 90% respectively while the maximum yield of sulfur was 76%. The series system performed well against the unsteady-state conditions. After a shutdown of 26 days, the reactors were recovered within 8 days. The results indicate that the process can meet the demand of intermittent operation and fluctuating concentration of influent wastewater. The product is mainly composed of elemental sulfur and a small amount of soluble substances such as protein, SO_4^2-, CI-, S2-, SO32-, Na＋ and so on. The ＇bio-sulfur＇ is different from common sulfur.