Rapid of cultivation dissimilatory perchlorate reducing granular sludge and characterization of the granulation process
Rapid of cultivation dissimilatory perchlorate reducing granular sludge and characterization of the granulation process
复制标题
异化高氯酸盐颗粒污泥的快速培养及造粒过程表征
DOI：
10.1016/j.biortech.2018.12.070
复制
发表时间：
2019
影响因子：
11.4
通讯作者：
Ren Xiaoning
中科院分区：
文献类型：
--
作者：
Yin Pengna;Guo Jianbo;Xiao Shumin;Chen Zhi;Song Yuanyuan;Ren Xiaoning
为了去除高浓度高氯酸盐，首先培养异化高氯酸盐还原颗粒污泥（DPR-GS）。在不同的接种污泥和上升流速（RAS：活性污泥（AS）和恒定上升流速; RDGS：絮凝颗粒污泥（DGS）和恒定上升流速; RDGS-f：DGS和波动上升流速）下，设置了3个相同的UASB反应器。RAS中的AS在第117天完全颗粒化，而RDGS和RDGS-f中的DGS均将颗粒化时间缩短至99天。此外，波动的上升流速可以更好地保证DPR-GS的快速培养。三个反应器的ClO 4 −去除率均为7.20 kg/（m3·d）。胞外聚合物（EPS）组成分析结果表明，多糖（PS）促进了生物聚集体的形成，而蛋白质（PN）有利于污泥颗粒化。微生物群落分析表明，硫酸盐发光菌和不动杆菌是优势异化高氯酸盐还原菌。
To remove high-strength perchlorate, dissimilatory perchlorate reducing granular sludge (DPR-GS) was first cultivated. Three identical UASB reactors were set up under different seed sludge and up-flow velocities (RAS: active sludge (AS) and constant up-flow velocities; RDGS: denitrifying granular sludge (DGS) and constant up-flow velocities; RDGS-f: DGS and fluctuating up-flow velocities). The AS in the RASwas completely granulated by day 117, while the DGS in the RDGSand RDGS-fwere both shortened the granulation time to 99 days. In addition, the fluctuating up-flow velocity can better ensure rapid cultivation of DPR-GS. Removal of ClO4−loading rate with 7.20 kg/(m3·d) occurred in all three reactors. The results of extracellular polymeric substances (EPS) composition analysis indicated the polysaccharose (PS) promoted the formation of bio-aggregates, while the protein (PN) benefited the granulation of sludge. The analyses of the microbial communities indicated thatSulfurospirillumandAcinetobacterwere the dominant dissimilatory perchlorate reducing bacteria.