Abstract：
At present, the application of sewage treatment technologies is restricted by high sulfate concentrations. In the present work, the sulfate removal was biologically treated using an upflow anaerobic sludge blanket (UASB) in the absence/presence of light. First, the start-up of UASB for the sulfate removal was studied in terms of COD degradation, sulfate removal, and effluent pH. Second, the impacts of different operation parameters (i.e., COD/SO42- ratio, temperature and illumination time) on the UASB performance were explored. Third, the properties of sludge derived from the UASB at different time were analyzed. Results show that after 28 days of start-up, the COD removal efficiencies in both the photoreactor and non-photoreactor could reach a range of 85-90% while such reactors could achieve > 90% of sulfate being removed. Besides, higher illumination time could facilitate the removal of pollutants in the photoreactor. To sum up, the present study can provide technical support for the clean removal of sulfate from wastewater using photoreactors.
摘要：
目前,高硫酸盐浓度限制了污水处理技术的应用。在目前的工作中,在没有/存在光的情况下，使用上流式厌氧污泥层（UASB）对硫酸盐的去除进行生物处理。首先,从COD降解方面研究了UASB去除硫酸盐的启动，硫酸盐去除，和出水pH值。第二,不同运行参数的影响(即COD/SO42-比值,温度和光照时间)对UASB性能的影响进行了探索。第三，分析了不同时间UASB污泥的性质。结果显示，在启动28天后，光反应器和非光反应器中的COD去除效率可以达到85-90%的范围,而这样的反应器可以实现>90%的硫酸盐被去除。此外,较高的光照时间可以促进光反应器中污染物的去除。总而言之,本研究可为光反应器清洁去除废水中的硫酸盐提供技术支持。
