Wei Jia-Min, Jiang Zhi-Yun, Cheng Cheng, Zhu Lin, Liu Wen-Ru, Shen Yao-Liang
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Jiangsu Collaborative Innovation Center of Water Treatment Technology and Material, Suzhou 215009, China.
Huan Jing Ke Xue. 2019 Feb 8;40(2):808-815. doi: 10.13227/j.hjkx.201807181.
The nitrogen and phosphorus removal characteristics during the start-up and the long-term operational stability of an anaerobic/anoxic (A/A) ABR coupled aerobic MBR system treating low C/N domestic wastewater were investigated. The results showed that the denitrifying phosphorus bacteria (DPBs) were successfully enriched within 46 d by controlling the nitrate recycling ratio (increasing from 150% to 300%), with a temperature of 30℃±2℃, volume loading rate of 0.8 kg·(m·d) and sludge reflux ratio of 80% in the ABR, sludge retention time (SRT) in the denitrifying phosphorus removal functional area of 25 d, and the dissolved oxygen (DO) of 1-2 mg·L in the MBR. The net phosphorus release and phosphorus uptake of DPBs reached 20.56 mg·Land 27.74 mg·L, respectively. Batch tests demonstrated that about 84.8% of phosphorus-accumulating organisms (PAOs) could use NO-N as an electron acceptor for denitrifying phosphorus removal. After 50 d of stable operation after the successful system start-up, the average removal rates of COD, NH-N, TN, and PO-P were 91.8%, 99.0%, 71.5%, and 94.2%, respectively. The results also suggested that 0.83 mg·LNO-N was consumed per 1 mg·L PO-P removed during the denitrifying phosphorus removal, indicating that the simultaneous nitrogen and phosphorus removal was achieved in the ABR-MBR system.
研究了厌氧/缺氧（A/A）折流板反应器（ABR）耦合好氧膜生物反应器（MBR）系统处理低C/N生活污水启动过程中的氮磷去除特性及长期运行稳定性。结果表明，在30℃±2℃的温度、ABR中0.8 kg·(m·d)的容积负荷率、80%的污泥回流比、反硝化除磷功能区25 d的污泥停留时间（SRT）以及MBR中1-2 mg·L的溶解氧（DO）条件下，通过控制硝酸盐循环比（从150%提高到300%），46 d内成功富集了反硝化聚磷菌（DPB）。DPB的净磷释放量和磷吸收量分别达到20.56 mg·L和27.74 mg·L。批次试验表明，约84.8%的聚磷菌（PAO）可利用NO-N作为电子受体进行反硝化除磷。系统成功启动后稳定运行50 d，COD、NH-N、TN和PO-P的平均去除率分别为91.8%、99.0%、71.5%和94.2%。结果还表明，反硝化除磷过程中每去除1 mg·L PO-P消耗0.83 mg·L NO-N，表明ABR-MBR系统实现了同步脱氮除磷。
