Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.
Bioresour Technol. 2019 Sep;288:121520. doi: 10.1016/j.biortech.2019.121520. Epub 2019 May 20.
For advanced phosphorus and nitrogen removal, denitrifying phosphorus removal (DPR) was used to treat secondary effluent of sewage plants based on alternating anoxic/anaerobic process within single-stage biofilter. Under the hydraulic load of 3 m/(m·h), average removal rates of TP and TN in the system were 61.05% and 90.54%. 82.7% of the NO-N removal occurred in the upper of the packing layer. TP removal occurred in upper and lower of the packing layer, accounting for 42.02% and 57.98% of the total removal, respectively. Biomass and bioactivity decreased proportional to the height incensement of packing layer. Nitrogen and phosphorus removal rates increased with anaerobic time while decreased with hydraulic load. 16S rDNA sequencing results showed dominant DNPAOs in the system included Acinetobacter and Dechloromonas, while dominant denitrifying bacteria included Flavobacterium, Comamonadaceae, Hydrogenophaga, Thauera and Azospira. The study further provided an effective and feasible way for advanced wastewater treatment.
为实现深度除磷脱氮，采用反硝化除磷（DPR）工艺，在单级生物滤池内基于交替缺氧/厌氧过程处理污水厂二级出水。在水力负荷为 3 m/（m·h）的条件下，系统对 TP 和 TN 的平均去除率分别为 61.05%和 90.54%。82.7%的 NO-N 去除发生在上部填料层。TP 的去除发生在上部和下部填料层，分别占总去除量的 42.02%和 57.98%。生物量和生物活性随填料层高度的增加而呈比例下降。氮磷去除率随厌氧时间的增加而增加，随水力负荷的增加而降低。16S rDNA 测序结果表明，系统中优势 DNPAOs 包括不动杆菌属和脱氯单胞菌属，而优势脱氮菌包括黄杆菌属、贪噬菌科、噬氢菌属、陶厄氏菌属和固氮螺菌属。该研究为深度处理污水提供了一种有效可行的方法。
