Li Jie, Hou Deyin, Li Kuiling, Zhang Yong, Wang Jun, Zhang Xiwang
Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China E-mail:
State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Water Sci Technol. 2018 Mar;77(5-6):1514-1523. doi: 10.2166/wst.2018.031.
In this study, real domestic wastewater treatment by forward osmosis-membrane distillation (FO-MD) integrated system was investigated in laboratory scale. The integrated membrane system presented a good separation performance and the removal efficiency of most contaminants in the domestic wastewater was higher than 90%. High molecular weight contaminants were completely removed, while a few low molecular weight contaminants permeated through the membrane. The FO membrane fouling layer mainly consisted of organic substances like polysaccharides and proteins, and was very loose and could be effectively removed by rinsing the membrane surface with tap water. By comparison, the MD membrane fouling was mainly induced by inorganic salts and was not as severe as that of the FO membrane. During 120 h continuous operation, the FO-MD integrated system exhibited satisfying performance stability and maintained a high water yield and high product water quality. The results indicated the potential of the FO-MD integrated system for municipal wastewater treatment in coastal cities, water purification and desalination.
在本研究中，在实验室规模下对正向渗透-膜蒸馏（FO-MD）集成系统处理实际生活污水进行了研究。该集成膜系统表现出良好的分离性能，生活污水中大多数污染物的去除效率高于90%。高分子量污染物被完全去除，而一些低分子量污染物透过了膜。FO膜污染层主要由多糖和蛋白质等有机物质组成，非常疏松，用自来水冲洗膜表面即可有效去除。相比之下，MD膜污染主要由无机盐引起，不如FO膜污染严重。在120小时的连续运行中，FO-MD集成系统表现出令人满意的性能稳定性，保持了较高的产水量和较高的产水水质。结果表明，FO-MD集成系统在沿海城市生活污水处理、水净化和海水淡化方面具有潜力。
