将一体式固定生物膜活性污泥（IFAS）系统升级为分体式双污泥脱氮除磷系统：营养物去除和微生物结构。
Upgrading integrated fixed-biofilm activated sludge (IFAS) system into separated two-sludge denitrifying phosphorus removal system: Nutrient removal and microbial structure.
机构信息
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China; School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, PR China.
School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266033, PR China.
出版信息
Chemosphere. 2022 Nov;307(Pt 3):135918. doi: 10.1016/j.chemosphere.2022.135918. Epub 2022 Aug 5.
An integrated fixed-biofilm activated sludge (IFAS) system was upgraded into a separated two-sludge denitrifying phosphorus removal system to treat domestic sewage with a low carbon/nitrogen ratio (C/N = 3.6). The system was operated in IFAS mode for 135 days and then converted to the separated two-sludge mode to perform denitrifying phosphorus removal for 110 days. With denitrification and phosphorus removal conducted using "single carbon source", the experimental results show that the total inorganic nitrogen (TIN) and phosphorus (P) removal efficiencies were improved by 13.4% and 36.5%, respectively. As the activated sludge unit and biofilm unit were separated, Dechloromonas (4.10%) and Candidatus Accumulibacter (1.56%) were enriched in activated sludge system, while the nitrifiers Nitrospira and Nitrosomonas occupied the biofilm with proportions of 19.6% and 5.68%, respectively. The separated two-sludge denitrifying phosphorus removal system was characterized by higher nutrient removal and functional bacteria enrichment.
采用一体式固定生物膜活性污泥（IFAS）系统改造为分置式两段生物脱氮除磷系统，以处理低碳氮比（C/N=3.6）的生活污水。系统先在 IFAS 模式下运行 135 天，然后转换为分置式两段工艺，进行反硝化除磷 110 天。通过“单一碳源”进行反硝化和除磷，实验结果表明，总无机氮（TIN）和磷（P）的去除效率分别提高了 13.4%和 36.5%。由于活性污泥单元和生物膜单元被分离，活性污泥系统中富集了脱氯菌（4.10%）和聚磷菌（1.56%），而硝化菌 Nitrospira 和 Nitrosomonas 分别占据生物膜的 19.6%和 5.68%。分置式两段生物脱氮除磷系统具有更高的营养物质去除率和功能菌富集度。
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