College of Environmental Science and Engineering, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Donghua University, Shanghai 201620, PR China.
Bioresour Technol. 2023 Sep;384:129270. doi: 10.1016/j.biortech.2023.129270. Epub 2023 Jun 7.
Integrating sponge iron (SI) and microelectrolysis individually into constructed wetlands (CWs) to enhance nitrogen and phosphorus removal are challenged by ammonia (NH-N) accumulation and limited total phosphorus (TP) removal efficiency, respectively. In this study, a microelectrolysis-assisted CW using SI as filler surrounding the cathode (e-SICW) was successfully established. Results indicated that e-SICW reduced NH-N accumulation and intensified nitrate (NO-N), the total nitrogen (TN) and TP removal. The concentration of NH-N in the effluent from e-SICW was lower than that from SICW in the whole process with 39.2-53.2 % decrease, and as the influent NO-N concentration of 15 mg/L and COD/N ratio of 3, the removal efficiencies of NO-N, TN and TP in e-SICW achieved 95.7 ± 1.9 %, 79.8 ± 2.5 % and 98.0 ± 1.3 %, respectively. Microbial community analysis revealed that hydrogen autotrophic denitrifying bacteria of Hydrogenophaga was highly enriched in e-SICW.
将海绵铁 (SI) 和微电解分别集成到人工湿地 (CW) 中以增强氮和磷的去除效果，分别受到氨 (NH-N) 积累和有限的总磷 (TP) 去除效率的挑战。本研究成功建立了一种使用 SI 作为阴极周围填料的微电解辅助 CW (e-SICW)。结果表明，e-SICW 减少了 NH-N 的积累并强化了硝酸盐 (NO-N)、总氮 (TN) 和 TP 的去除。e-SICW 出水的 NH-N 浓度在整个过程中比 SICW 低 39.2-53.2%，当进水 NO-N 浓度为 15mg/L 和 COD/N 比为 3 时，e-SICW 对 NO-N、TN 和 TP 的去除效率分别达到 95.7±1.9%、79.8±2.5%和 98.0±1.3%。微生物群落分析表明，氢自养反硝化细菌 Hydrogenophaga 在 e-SICW 中高度富集。
