Journal
BIORESOURCE TECHNOLOGY
Volume 269, Issue -, Pages 40-49Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.08.084
Keywords
Perchlorate; Step-feed; Sulfur-based; Oxidation-reduction potential; Microbial community structure; Principal component analysis
Funding
- National Natural Science Foundation of China [5167838751708389]
- Key project of Tianjin Natural Science Foundation [17JCZDJC39300]
- Science Research Program of High Level Talents in Hebei Universities (China) [GCC2014045]
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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(1/2)/L-1/2.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.
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