High boiling point organic solvents (HBOS) are integral to various industrial applications due to their versatile properties. However, the disposal of these solvents raises significant environmental concerns and incurs substantial costs. In this research, an osmotically assisted reverse osmosis (OARO) strategy was utilized to effectively concentrate and treat HBOS (N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), N,N-dimethylacetamide (DMAc), and N-methyl-2-pyrrolidone (NMP)) wastewater for recycling of the solvents. The influence of several operational parameters, comprising flow rate, applied pressure, number of membrane modules, and their connection mode, was systematically investigated. Specifically, enhancing the operating pressure and reducing flow rates will both lead to higher concentrations of DMF. Furthermore, we developed a simulation model that can reproduce and predict the OARO process well. Investigating long-term operational stability revealed that the OARO process can sustain stable operations for approximately 18 months. Finally, real DMF wastewater containing 1.0 wt.% DMF from an RO membrane company was treated using the OARO technique, resulting in a successful concentration of approximately 42 times. The findings of this research underscore the significant practical applicability of the OARO strategy for HBOS wastewater recovery, recycling, and reuse.

中文翻译：

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渗透辅助反渗透浓缩高沸点有机溶剂

高沸点有机溶剂 （HBOS） 具有多种特性，是各种工业应用不可或缺的一部分。然而，这些溶剂的处置会引起严重的环境问题，并产生大量成本。在这项研究中，采用渗透辅助反渗透 （OARO） 策略有效浓缩和处理 HBOS （N，N-二甲基甲酰胺 （DMF）、二甲基亚砜 （DMSO）、N，N- 二甲基乙酰胺 （DMAc） 和 N-甲基-2-吡咯烷酮 （NMP）） 废水，以回收溶剂。系统研究了几个作参数的影响，包括流速、施加的压力、膜组件的数量及其连接模式。具体来说，提高工作压力和降低流速都会导致 DMF 浓度升高。此外，我们开发了一个仿真模型，可以很好地再现和预测 OARO 过程。对长期运行稳定性的调查表明，OARO 流程可以维持大约 18 个月的稳定运行。最后，使用 OARO 技术处理来自一家 RO 膜公司含有 1.0 wt.% DMF 的真实 DMF 废水，成功实现了约 42 倍的浓缩。这项研究的结果强调了 OARO 策略对 HBOS 废水回收、回收和再利用的重要实际适用性。