共查询到16条相似文献,搜索用时 484 毫秒
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海水淡化是解决淡水危机的重要途径,新工艺、新型膜材料及新能源的利用,有望进一步降低海水淡化成本。介绍了多效蒸发、多级闪蒸、压气蒸馏、反渗透等海水淡化工艺以及基于膜技术的海水淡化集成工艺的最新进展,分析了利用风能、太阳能、核能和化学热能等可替代能源进行海水淡化的可能性,在此基础上,提出了海水淡化未来的发展方向。 相似文献
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Suzuki Y Hanagasaki N Furukawa T Yoshida T 《Journal of Bioscience and Bioengineering》2008,105(4):383-388
The removal of bacteria from rearing water and washing water in aquaculture systems, aquariums and fishing port facilities is the most important means of diminishing the risk of fish diseases, improving public health and ensuring high food quality. However, there are few methods of bacterial elimination, e.g., disinfection. Thus, it is necessary to develop a technology for bacterial removal from coastal seawater. In this study, the removal efficiency for several groups of bacteria by foam separation using dispersed bubbles and surface-active substances was determined using both batch equipment and a continuous-flow unit. By batch processing with only 1 mg/l milk casein added as a surface-active substance and by supplying bubbles, viable bacteria, enterococci, Vibrio, and Salmonella-like bacteria were removed effectively at removal efficiencies of 80% or greater. In addition, suspended solids were also removed from coastal seawater. However, fecal coliforms were difficult to remove by foam separation. The removal efficiency for viable bacteria was greater than 70% using a continuous system. Bacteria were concentrated in a very small amount of generated foam and removed from the water. The foam separation using dispersed bubbles and surface-active substances is a feasible convenient technology for seawater purification as a treatment prior to membrane filtration or ultraviolet irradiation. 相似文献
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朱维韬 《皮革制作与环保科技》2022,3(2):16-18
当前,在社会的发展过程中,作为严重缺水的国家,我国对水资源利用情况的关注度不断上升,本文介绍了低放射性废水处理现状、膜蒸馏技术以及用膜蒸馏技术处理低放射性废水的具体情况,以期通过对地方性废水进行膜蒸馏处理的方式,提升水资源利用率,希望能够给读者带来启发。 相似文献