School of Civil Engineering, Guangzhou University, Guangzhou, China.
School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, China.
Bioresour Technol. 2019 Nov;291:121871. doi: 10.1016/j.biortech.2019.121871. Epub 2019 Jul 24.
Denitrifying Sulfur conversion-associated Enhanced Biological Phosphorus Removal (DS-EBPR) bioprocess has been recently developed for saline sewage treatment. This study investigated the applicability of granulation technology in DS-EBPR by long-term operation (272 days) of a lab-scale reactor to cultivate sludge granules, then analyzed important physicochemical and biological properties. The findings of this research showed that the net P removal and denitrification efficiencies in DS-EBPR were 80% and 98%, respectively. The average particle size was about 100 μm, and the ratio of SVI and SVI was <1.3, indicating the activated sludge was well aggregated as micro-granules. The dry density was between 32 and 56 mg/mL, and the specific surface area was 28 m/g, demonstrating good microporous structure. FISH reveals absence of PAOs, but enriched with SRB (predominant) and denitrifying bacteria in the DS-EBPR granular sludge. Overall, this study provided essential characterization information of DS-EBPR granular sludge which can be used for future development.
反硝化硫转化相关的增强生物除磷（DS-EBPR）生物工艺最近已被开发用于处理含盐污水。本研究通过长期（272 天）运行实验室规模的反应器来培养污泥颗粒，考察了颗粒化技术在 DS-EBPR 中的适用性，然后分析了重要的物理化学和生物特性。研究结果表明，DS-EBPR 中的净磷去除率和脱氮效率分别为 80%和 98%。平均粒径约为 100μm，SVI 和 SVI 的比值<1.3，表明活性污泥作为微颗粒良好地聚集。干密度在 32 到 56mg/mL 之间，比表面积为 28m/g，表明具有良好的微孔结构。FISH 显示不存在 PAOs，但在 DS-EBPR 颗粒污泥中富集了大量的 SRB（主要）和脱氮菌。总的来说，本研究为 DS-EBPR 颗粒污泥的未来发展提供了必要的特性描述信息。
