School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China.
Institute of Applied Ecology, CAS, Shenyang 110016, China.
Bioresour Technol. 2018 Jan;247:157-164. doi: 10.1016/j.biortech.2017.09.084. Epub 2017 Sep 14.
Consisted of anaerobic (ANA), anoxic-1 (AN1), aerobic-1 (AE1), anoxic-2 (AN2), aerobic-2 (AE2) reactors and sediment tank, the two-staged A/O process was applied for depth treatment of electroplating tail wastewater with high electrical conductivity and large amounts of ammonia nitrogen. It was found that the NH-N and COD removal efficiencies reached 97.11% and 83.00%, respectively. Besides, the short-term salinity shock of the control, AE1 and AE2 indicated that AE1 and AE2 have better resistance to high salinity when the concentration of NaCl ranged from 1 to 10g/L. Meanwhile, it was found through high-throughput sequencing that bacteria genus Nitrosomonas, Nitrospira and Thauera, which are capable of nitrogen removal, were enriched in the two-staged A/O process. Moreover, both salt-tolerant bacteria and halophili bacteria were also found in the combined process. Therefore, microbial community within the two-staged A/O process could be acclimated to high electrical conductivity, and adapted for electroplating tail wastewater treatment.
采用两级 A/O 工艺（由厌氧（ANA）、缺氧-1（AN1）、好氧-1（AE1）、缺氧-2（AN2）和好氧-2（AE2）反应器和沉淀槽组成）对高电导率和大量氨氮的电镀尾水进行深度处理。结果表明，NH-N 和 COD 的去除效率分别达到 97.11%和 83.00%。此外，通过对对照组、AE1 和 AE2 的短期盐度冲击实验发现，当 NaCl 浓度在 1-10g/L 范围内时，AE1 和 AE2 对高盐度具有更好的抗性。同时，通过高通量测序发现，具有脱氮能力的细菌属硝化菌、亚硝化菌和陶厄氏菌在两级 A/O 工艺中得到了富集。此外，在组合工艺中还发现了耐盐菌和嗜盐菌。因此，两级 A/O 工艺中的微生物群落可以适应高电导率，并适应电镀尾水处理。
