Department of Environmental Engineering, Marmara University, 34722 Goztepe, Istanbul, Turkey.
Department of Environmental Engineering, Marmara University, 34722 Goztepe, Istanbul, Turkey.
Waste Manag. 2019 Feb 15;85:186-194. doi: 10.1016/j.wasman.2018.12.033. Epub 2018 Dec 31.
Ammonia removal from synthetic ammonia solutions and chicken manure digestate via vapor pressure membrane contactor through Polytetrafluoroethylene (PTFE) membrane was investigated. The highest ammonia mass flux, separation factor, and removal efficiencies of 28.6 ± 0.2 g N/m h, 53.9 ± 10.7, and 97.6 ± 0.7% were observed for synthetic solutions, respectively. Ammonia removal efficiency of 93.6 ± 1.9% through membrane contactor was observed for chicken manure digestate decreasing the total ammonia concentration from 3643.5 ± 67.2 to 230.9 ± 46.2 mg N/L. Phytoremediation via Lemna minor species was used as a polishing step to remove remaining ammonia from the membrane contactor effluent. Total ammonia concentration was then decreased below 2 mg N/L through evaporation, nitrification, and plant uptake processes occurring in the phytoremediation containers. This study reveals that ammonia can be successfully removed via VPMC and phytoremediation systems and the process is implementable as it can be coupled to anaerobic digestion processes to recover ammonia and to prevent ammonia inhibition.
采用聚四氟乙烯（PTFE）膜通过汽相膜接触器从合成氨溶液和鸡粪消化液中去除氨。在合成溶液中，氨的最高质量通量、分离因子和去除效率分别为 28.6±0.2gN/mh、53.9±10.7 和 97.6±0.7%。通过膜接触器观察到鸡粪消化液的氨去除效率为 93.6±1.9%，将总氨浓度从 3643.5±67.2mgN/L 降低至 230.9±46.2mgN/L。通过浮萍属植物进行植物修复作为抛光步骤，从膜接触器流出物中去除残留的氨。通过在植物修复容器中发生的蒸发、硝化和植物吸收过程，总氨浓度随后降低至 2mgN/L 以下。本研究表明，氨可以通过 VPMC 和植物修复系统成功去除，并且该过程是可行的，因为它可以与厌氧消化过程耦合，以回收氨并防止氨抑制。
