Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China; School of Environment Science and Engineering, Tianjin University, Tianjin 300350, PR China.
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Jinjing Road 26#, Tianjin 300384, PR China.
Bioresour Technol. 2018 Dec;269:40-49. doi: 10.1016/j.biortech.2018.08.084. Epub 2018 Aug 21.
Excess sulfate production and low concentration of perchlorate removal are the main problems for sulfur-based perchlorate reduction reactor. In this study, the problems were firstly solved by step-feeding under mixotrophic conditions. The performances of step-feed sulfur-based reactor (SFSBR) and up-flow sulfur-based reactor (UFSBR) are compared. At perchlorate of 194 mg/L, acetate of 28.8 mg/L and hydraulic retention time of 0.9 h, the Half-order reaction rate constant and the sulfate production of SFSBR were 29.7 mg/L·h and 171 mg/L, respectively, which were superior to those of UFSBR. The oxidation-reduction potential values of SFSBR were lower than that of UFSBR. Meanwhile, the biodiversity along the height of the reactor was decreased by step-feeding. Principal component analysis showed significant interrelations existed among the bacterial community composition and the operational/environmental conditions in each treatment zone. Consequently, the SFSBR provides an effectively alteration for the removal of high perchlorate concentration and control sulfate.
硫酸盐的过量产生和高浓度的高氯酸盐去除是基于硫的高氯酸盐还原反应器的主要问题。在本研究中，通过混养条件下的分步进料首先解决了这些问题。比较了分步进料硫基反应器 (SFSBR) 和上流硫基反应器 (UFSBR) 的性能。在高氯酸盐为 194mg/L、乙酸盐为 28.8mg/L、水力停留时间为 0.9h 的条件下，SFSBR 的半阶反应速率常数和硫酸盐生成量分别为 29.7mg/L·h 和 171mg/L，优于 UFSBR。SFSBR 的氧化还原电位值低于 UFSBR。同时，分步进料降低了沿反应器高度的生物多样性。主成分分析表明，各处理区的细菌群落组成与操作/环境条件之间存在显著的相互关系。因此，SFSBR 为去除高浓度高氯酸盐和控制硫酸盐提供了一种有效的改变方式。
