强化厌氧细胞内碳储存以处理低碳氮比（C/N）废水在同步硝化-反硝化除磷（SNDPR）系统中。
Treating low carbon/nitrogen (C/N) wastewater in simultaneous nitrification-endogenous denitrification and phosphorous removal (SNDPR) systems by strengthening anaerobic intracellular carbon storage.
机构信息
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China.
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing, 100124, PR China; Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT, 06269, USA.
出版信息
Water Res. 2015 Jun 15;77:191-200. doi: 10.1016/j.watres.2015.03.019. Epub 2015 Mar 28.
A novel simultaneous nitrification denitrification and phosphorous removal-sequencing batch reactor (SNDPR-SBR) enriched with PAOs (phosphorus accumulating organisms), DPAOs (denitrifying PAOs), and GAOs (glycogen accumulating organisms) at the ratio of 2:1:1 was developed to achieve the simultaneous nutrient and carbon removal treating domestic wastewater with low carbon/nitrogen ratio (≤3.5). The SNDPR system was operated for 120 days at extended anaerobic stage (3 h) and short aerobic stage at low oxygen concentration (2.5 h) with short sludge retention time (SRT) of 10.9 d and hydraulic retention time (HRT) of 14.6 h. The results showed that at the stable operating stage, the average effluent chemical oxygen demand (COD) and PO4(3-)-P concentrations were 47.2 and 0.2 mg L(-1), respectively, the total nitrogen (TN) removal efficiency was 77.7%, and the SND efficiency reached 49.3%. Extended anaerobic stage strengthened the intracellular carbon (mainly poly-β-hydroxybutyrate, PHB) storage, efficiently utilized the organic substances in wastewater, and provided sufficient carbon sources for denitrification and phosphorus uptake without external carbon addition. Short aerobic stage at low oxygen concentration (dissolved oxygen (DO): 1 ± 0.3 mg L(-1)) achieved a concurrence of nitrification, endogenous denitrification, denitrifying and aerobic phosphorus uptake, and saved about 65% energy consumption for aeration. Microbial community analysis demonstrated that P removal was mainly performed by aerobic PAOs while N removal was mainly carried out by denitrifying GAOs (DGAOs), even though DPAOs were also participated in both N and P removal.
一种新型的同时硝化反硝化除磷序批式反应器（SNDPR-SBR），其中富含聚磷菌（PAOs）、反硝化聚磷菌（DPAOs）和聚糖菌（GAOs），比例为 2:1:1，用于处理低碳氮比（≤3.5）的生活污水，实现同时去除营养物质和碳。该 SNDPR 系统在延长的厌氧阶段（3 h）和低氧浓度（2.5 h）的短好氧阶段运行 120 天，具有 10.9 d 的短污泥停留时间（SRT）和 14.6 h 的水力停留时间（HRT）。结果表明，在稳定运行阶段，出水化学需氧量（COD）和 PO4(3-)-P 的平均浓度分别为 47.2 和 0.2 mg L(-1)，总氮（TN）去除率为 77.7%，SND 效率达到 49.3%。延长的厌氧阶段增强了细胞内碳（主要是聚-β-羟基丁酸酯，PHB）的储存，有效地利用了废水中的有机物，无需外加碳源即可为反硝化和磷吸收提供充足的碳源。低氧浓度（溶解氧（DO）：1 ± 0.3 mg L(-1)) 的短好氧阶段实现了硝化、内源反硝化、反硝化和好氧吸磷的同时进行，节省了约 65%的曝气能耗。微生物群落分析表明，好氧 PAOs 主要进行磷的去除，而 DGAOs（反硝化 GAOs）主要进行氮的去除，尽管 DPAOs 也参与氮和磷的去除。
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