Heterotrophic combiningsulfur-based autotrophic process reduction of high concentration perchlorate using ananaerobic baffle reactor
LI Kun, LI Hai-bo, LI Yao-feng, LIN Xin-yi, LI Bao-xin, SONG Yuan-yuan, GUO Jian-bo
Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
A novel heterotrophic combining sulfur-based autotrophic ABR reactor was constructed to treatthe high concentration of perchlorate (ClO4-) wastewater.The ClO4- removal, the sulfate (SO42-) production, the biomass and EPS changes under different ClO4- concentrationswereexplored. The results showed that the ClO4- removalefficiency reached to 99.60% at HRT of 12h and the influent ClO4- concentration of 300mg/L, the effluent SO42- concentration was approximately stabilized at 150mg/L.The influent pH was approximately 7.8~8.0. With ClO4- concentration increasing, the effluent pH of the heterotrophic unit was increased to 8.0~8.3, while the effluent pH of the autotrophic unit was decreased to 6.6~6.9.Therefore, the combined heterotrophic and sulfur-based autotrophic process can achieve an acid-base balance.Moreover, the more EPScontent wasproduced by microorganism when influent perchlorate concentration increased gradually in the process.And the contentof EPS in the first compartment of the heterotrophic unit was maximum, which reachedto 102.46mg/(g·vss). The secretion of EPS can not only form a protective layer to resist external pressure, but also play a role in the reserve of carbon sources and energy.
李昆, 李海波, 李瑶峰, 林心仪, 李宝鑫, 宋圆圆, 郭建博. 异养协同硫自养ABR系统还原高浓度高氯酸盐[J]. 中国环境科学, 2018, 38(11): 4153-4158.
LI Kun, LI Hai-bo, LI Yao-feng, LIN Xin-yi, LI Bao-xin, SONG Yuan-yuan, GUO Jian-bo. Heterotrophic combiningsulfur-based autotrophic process reduction of high concentration perchlorate using ananaerobic baffle reactor. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(11): 4153-4158.
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