School of Environment Science and Spatial Informatics, China University of Mining and Technology, 221116 Xuzhou, China; School of Civil Engineering, Southwest Jiaotong University, 610031 Chengdu, China.
School of Environment Science and Spatial Informatics, China University of Mining and Technology, 221116 Xuzhou, China.
Bioresour Technol. 2019 Aug;286:121386. doi: 10.1016/j.biortech.2019.121386. Epub 2019 Apr 29.
The effect of dewatered activated sludge on aerobic granulation was investigated in a sequencing batch reactor (SBR) under short settling time. The results showed that dewatered sludge accelerated aerobic granulation and the granulation was completed within 5 days. On day 5, the aerobic granules were regular, compact, fast-settling and high granular strength and possessed excellent removal performance of carbon and nitrogen. The change trend of extracellular polymeric substances (EPS) was basically consistent with granular strength and granulation rate, indicating that EPS in granules played a vital function for granulation. Microbial community succession was investigated by pyrosequencing. In 5 days, microbial diversity was reduced and certain strains were rapidly enriched in the granules to become dominant species, serving on a crucial role in rapid granulation and pollutant removal as they could secrete excess EPS and possess the excellentability removing carbon and nitrogen pollutants.
脱水活性污泥对短沉降时间下序批式反应器（SBR）中好氧颗粒化的影响。结果表明，脱水污泥加速了好氧颗粒化，在 5 天内完成了颗粒化。在第 5 天，好氧颗粒规则、紧凑、快速沉降、高颗粒强度，具有优异的碳氮去除性能。胞外聚合物（EPS）的变化趋势基本与颗粒强度和颗粒化速率一致，表明颗粒中 EPS 对颗粒化起着至关重要的作用。通过焦磷酸测序研究了微生物群落的演替。在 5 天内，微生物多样性减少，某些菌株在颗粒中迅速富集并成为优势种，在快速颗粒化和污染物去除中起着至关重要的作用，因为它们可以分泌过量的 EPS，具有去除碳氮污染物的优异能力。
