Bao Hongxu, Liu Min, Li Xianhui, Ren Nanqi, Li Jianzheng
School of Environment, Liaoning University, Shenyang, People's Republic of China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, People's Republic of China.
Environ Technol. 2023 Feb;44(5):579-590. doi: 10.1080/09593330.2021.1979107.
A packed-bed anaerobic-aerobic reactor (PBAOR) with two anaerobic and two aerobic compartments was constructed to treat manure-free piggery wastewater which was characterized by high ammonium (NH4-N) and low ratio of chemical oxygen demand (COD) to total nitrogen (TN). Performed for 60 days at the normal atmospheric temperature of 25 °C with a constant hydraulic retention time of 32 h and reflux ratio of 2.0, a stable state in pollutants removal was obtained in the PBAOR. Within the next routine operation process, the removal of COD, NH4-N and TN was above 85.7%, 98.2% and 85.8%, with a residual less than 81.7, 7.2 and 39.9 mg L in effluent, respectively. Twelve veterinary antibiotics classified into tetracyclines (TCs), sulphonamides (SAs) and fluoroquinolones (FQs) were detected from the piggery wastewater. The PBAOR was effective in removing TCs and SAs with an average removal of 74.8% and 93.3%, respectively, but presented a negative removal for FQs. Most COD in the piggery wastewater was mainly removed in the first two anaerobic compartments along with an obvious removal of TCs and SAs, while the TN were mainly removed in the last two aerobic compartments with the negative removal of FQs.
构建了一个具有两个厌氧隔室和两个好氧隔室的填充床厌氧-好氧反应器（PBAOR），用于处理无粪便的养猪场废水，该废水的特点是铵含量高（NH4-N）且化学需氧量（COD）与总氮（TN）的比值低。在25 °C的常温下运行60天，水力停留时间恒定为32 h，回流比为2.0，PBAOR在污染物去除方面达到了稳定状态。在接下来的常规运行过程中，COD、NH4-N和TN的去除率分别高于85.7%、98.2%和85.8%，出水残留量分别低于81.7、7.2和39.9 mg/L。从养猪场废水中检测出了12种兽用抗生素，分为四环素类（TCs）、磺胺类（SAs）和氟喹诺酮类（FQs）。PBAOR对TCs和SAs的去除效果良好，平均去除率分别为74.8%和93.3%，但对FQs的去除率为负。养猪场废水中的大部分COD主要在前两个厌氧隔室中被去除，同时TCs和SAs也有明显去除，而TN主要在后两个好氧隔室中被去除，FQs的去除率为负。
