Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China.
Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing 210098, China.
Bioresour Technol. 2021 Feb;321:124469. doi: 10.1016/j.biortech.2020.124469. Epub 2020 Dec 1.
The impacts of WWTPs effluents on nutrients removal and epiphytic microbial community in constructed wetlands dominated by submersed macrophytes remain to be fully illustrated. In this study, compared to M. Spicatum, artificial submersed macrophytes (control) generally had higher NH-N (78.35% vs 80.52%) and TN (73.35% vs 90.25%) removal rates and similar COD (70.64% vs 70.80%) and TP (59.86% vs 60.82%) removal rates in wetlands receiving simulated effluents of WWTPs (GB18918-2002). Microbial population richness was higher in epiphytic biofilms on M. Spicatum than artificial ones, and substrates played the most decisive role in determining the microbial diversities. Network analysis revealed that there were more complex interactions among environmental parameters, bacteria and eukaryotes in M. Spicatum systems than in artificial ones. Nutrients in effluents could cause damage to M. Spicatum. The results highlight that artificial plants have better performance on effluents deep treatments than submerged plants.
污水处理厂出水对沉水植物为主的人工湿地中营养物质去除和附生微生物群落的影响仍需充分说明。本研究中，与菹草相比，人工沉水植物（对照）在接受模拟污水处理厂出水（GB18918-2002）时，对 NH-N（78.35%比 80.52%）和 TN（73.35%比 90.25%）的去除率更高，对 COD（70.64%比 70.80%）和 TP（59.86%比 60.82%）的去除率相似。菹草附生生物膜中的微生物种群丰富度高于人工生物膜，基质对微生物多样性的决定作用最大。网络分析表明，在菹草系统中，环境参数、细菌和真核生物之间的相互作用比人工系统更为复杂。废水中的营养物质可能会对菹草造成损害。研究结果表明，人工植物在深度处理污水方面比沉水植物具有更好的性能。
