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气隙式膜蒸馏处理垃圾渗滤液膜浓缩液

作者：杜永亮，李郑宇，刘博，宋阳，何少林，张光远，苑宏英

单位： 1. 天津城建大学环境与市政工程学院天津市水质科学与技术重点实验室，天津 300384； 2. 基础设施防护和环境绿色生物科技国际联合研究中心，天津 300384； 3. 中国石油规划总院，北京 100089

关键词：垃圾渗滤液; 气隙式膜蒸馏; 深度浓缩; 膜通量; 浓缩系数

DOI号： 10.16159/j.cnki.issn1007-8924.2025.06.014

分类号： TQ319

出版年,卷(期):页码： 2025,45(6):126-137

摘要：

采用反渗透技术处理垃圾渗滤液过程中会产生大量的垃圾渗滤液膜浓缩液（LLMC），其具有盐浓度高、难处理和环境风险大的特点。本研究采用气隙式膜蒸馏（AGMD）对采自某生活垃圾填埋场的LLMC进行浓缩处理，考察了AGMD的性能，并探究深度浓缩过程中其对污染物的截留能力。结果表明，料液温度升高可显著提升AGMD性能，当料液温度由40 ℃增加到60 ℃，使用0.45 μm疏水膜AGMD的通量和造水比分别提高112.04%和33.33%。膜组件结构和膜材料对AGMD性能也有重要影响，采用1 mm气隙宽度和0.45 μm疏水膜的AGMD性能最佳。在LLMC深度浓缩处理过程中，AGMD性能较为稳定，其对除氨氮外各污染物截留率均达到99%以上，当浓缩系数为5时未出现显著的膜污染和膜润湿现象。可见，AGMD技术能够应用于LLMC深度浓缩处理领域。

A large amount of landfill leachate membrane concentrate (LLMC) is generated during the treatment of landfill leachate using reverse osmosis technology, which is characterized by high salt concentration, poor treatability and high environmental risk. In this study, air gap membrane distillation (AGMD) was used to concentrate LLMC extracted from a domestic landfill plant, to investigate the performance of AGMD and the retention capacity of the pollutants in the deep concentration process. The results showed that increasing the feed temperature significantly enhanced the performance of AGMD, and when the feed temperature was increased from 40 ℃ to 60 ℃, the mass flux and gained output ratio of AGMD with 0.45 μm hydrophobic membrane increased by 112.04% and 33.33%, respectively. Membrane module structure and membrane material also had a significant impact on AGMD performance, with the best performance when using a hydrophobic membranes with 1 mm gap width and 0.45 μm pore size. During the LLMC deep concentration treatment process, the performance of AGMD was stable, and its rejection rate of all pollutants except ammonia nitrogen reached more than 99%, and there was no significant membrane contamination and membrane wetting when the concentration factor was 5. It can be seen that AGMD technology can be applied in the field of LLMC deep concentration treatment.

基金项目：

国家重点研发计划“政府间国际创新合作”专项项目（2019YFE0122400）；中国石油天然气股份有限公司规划总院管理决策支持项目[集团公司取用水管理技术支持（JH2025-010）]

作者简介：

杜永亮（1985-），男，山西吕梁人，博士，讲师，研究方向为污水污泥处理、固废资源化处置.

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