The present research employs a pilot-scale selective electrodialysis system to treat liquid digestate, fractionating nutrient ions and exploring fertilizer creation via ammonia stripping and phosphorus precipitation, while studying pharmaceutical transport behavior and examining membrane fouling. The influence of diverse potentials was studied in simulated and real digestate, with 30 V application proven more efficient overall. Applying consecutive runs resulted in products that were 7.9, 7.4, 1.7, 5.3, and 6 times more concentrated compared to the feed solution for NH4+, K+, PO43-, Ca2+, and Mg2+, respectively. Pharmaceuticals analysis showed that ciprofloxacin was completely retained in the liquid digestate, while ibuprofen was detected in the anionic product. Diclofenac was initially present in the digestate but was undetectable in the final products, suggesting it adhered to the membrane. Membranes showed inorganic and organic fouling. The monovalent cation exchange membrane had severe salt scaling, showing calcium and magnesium deposits, and fewer functional groups.

中文翻译：

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用于液体沼渣中营养回收和药物去除的选择性电渗析：中试规模研究和潜在的肥料生产


本研究采用中试规模的选择性电渗析系统来处理液体沼渣，分馏营养离子并通过氨剥离和磷沉淀探索肥料制造，同时研究药物运输行为和检查膜污染。在模拟和真实沼渣中研究了不同电位的影响，事实证明 30 V 应用总体上更有效。与进料溶液相比，连续运行得到的产物浓度分别高出 7.9、7.4、1.7、5.3 和 6 倍 NH4+、K+、PO43-、Ca2+ 和 Mg2+。药物分析表明，环丙沙星完全保留在液体沼渣中，而在阴离子产物中检测到布洛芬。双氯芬酸最初存在于沼渣中，但在最终产物中检测不到，表明它粘附在膜上。膜显示无机和有机污垢。单价阳离子交换膜有严重的盐垢，显示钙和镁沉积，官能团较少。