School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China; State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing, 100048, China.
The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing, 100875, China.
J Environ Manage. 2022 Nov 1;321:115890. doi: 10.1016/j.jenvman.2022.115890. Epub 2022 Aug 12.
Compared with sequencing batch reactor, continuous flow dynamic reactors are more conducive to promotion and application. In this study, the ability of a three-dimensional (3D) electrode dynamic reactor to remove pollutants in the landfill leachate was investigated, in which landfill leachate entered through continuous flow. Either increased of current density or the decreased of flow rate was conducive to the removal of pollutants. The optimal process parameters for current density and flow rate were 16 mA cm and 0.75 L h, respectively. When the current density was constant at 16 mA cm and the flow rate was kept at 0.75 L h, 60.02% of total organic carbon (TOC), 96.50% of chroma, 64.98% of chemical oxygen demand (COD) and 99.46% of ammonia nitrogen (NH-N) were removed. The characteristic peaks of refractory organic pollutants were reduced by 97.95%. After the reaction, the biological oxygen demand (BOD)/COD was increased from 0.24 to 0.32. As one of the emerging trace organics in landfill leachate, 85.90% of ibuprofen (IBU) was removed. The results showed that the 3D electrode dynamic reactor constructed in this study could reduce the TOC, refractory trace organic pollutant, NH-N and chroma in the landfill leachate. The 3D electrode dynamic reactor constructed in this research has application potential in the field of landfill leachate treatment.
与序批式反应器相比，连续流动动态反应器更有利于推广和应用。本研究考察了三维（3D）电极动态反应器去除垃圾渗滤液中污染物的能力，其中垃圾渗滤液通过连续流动进入。无论是增加电流密度还是降低流速都有利于污染物的去除。电流密度和流速的最佳工艺参数分别为 16 mA cm 和 0.75 L h。当电流密度恒定时为 16 mA cm，流速保持在 0.75 L h 时，总有机碳（TOC）的去除率为 60.02%，色度的去除率为 96.50%，化学需氧量（COD）的去除率为 64.98%，氨氮（NH-N）的去除率为 99.46%。难生物降解有机污染物的特征峰减少了 97.95%。反应后，生物需氧量（BOD）/COD 从 0.24 增加到 0.32。作为垃圾渗滤液中新兴的痕量有机污染物之一，布洛芬（IBU）的去除率为 85.90%。结果表明，本研究构建的 3D 电极动态反应器可以降低垃圾渗滤液中的 TOC、难生物降解痕量有机污染物、NH-N 和色度。本研究构建的 3D 电极动态反应器在垃圾渗滤液处理领域具有应用潜力。
