| Title: | Simultaneous ammonium and water recovery from landfill leachate using an integrated two-stage membrane distillation |
| Author(s): | Yang H; Liu Q; Shu X; Yu H; Rong H; Qu F; Liang H; |
| Address: | "School of Civil Engineering, Guangzhou University, Guangzhou 510006, China. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China. Electronic address: huarongyu@gzhu.edu.cn. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou 510006, China. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China; Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou 510006, China. Electronic address: qufangshu@163.com. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China" |
| DOI: | 10.1016/j.watres.2023.120080 |
| ISSN/ISBN: | 1879-2448 (Electronic) 0043-1354 (Linking) |
| Abstract: | "Resources recovery from landfill leachate (LFL) has been attracting growing attention instead of merely purifying the wastewater. An integrated two-stage membrane distillation (ITMD) was proposed to simultaneously purify LFL and recover ammonia in this study. The results showed that organics could be always effectively rejected by the ITMD regardless of varying feed pH, with COD removal higher than 99%. With feed pH increased from 8.64 to 12, the ammonia migration (50-100%) and capture (36-75%) in LFL were considerably enhanced, boosting the separated ammonia enrichment to 1.3-1.7 times due to the improved ammonium diffusion. However, the corresponding membrane flux of the first MD stage decreased from 13.7 to 10.5 L/m(2).h. Elevating feed pH caused the deprotonation of NOM and its binding with inorganic ions, constituting a complex fouling layer on the membrane surface in the first MD stage. In contrast, the membrane permeability and fouling of the second MD were not affected by feed pH adjustment because only volatiles passed through the first MD. More importantly, it was estimated that ITMD could obtain high-quality water and recover high-purity ammonium from LFL with relatively low ammonium concentration at an input cost of $ 2-3/m(3), which was very competitive with existing techniques. These results demonstrated that the ITMD can be a valuable candidate strategy for simultaneous water purification and nutrient recovery from landfill leachate" |
| Keywords: | "*Ammonium Compounds Ammonia *Water Pollutants, Chemical Distillation Water *Water Purification/methods Membranes, Artificial Ammonium recovery Integrated two-stage membrane distillation (ITMD) Landfill leachate Membrane fouling;" |
| Notes: | "MedlineYang, Haiyang Liu, Qinsen Shu, Xinying Yu, Huarong Rong, Hongwei Qu, Fangshu Liang, Heng eng England 2023/06/01 Water Res. 2023 Jul 15; 240:120080. doi: 10.1016/j.watres.2023.120080. Epub 2023 May 17" |
