Water and energy are closely linked natural resources-the transportation, treatment, and distribution of water depends on low-cost energy;while power generation requires large volumes of water. Seawater desalination is a mature technology for increasing freshwater supply, but it is essentially a trade of energy for freshwater and is not a viable solution for regions where both water and energy are in short supply. This paper discusses the development and application of a renewable-energy-driven reverse osmosis (RO) system for water desalination and the treatment and reuse of aquaculture wastewater. The system consists of (1) a wind-driven pumping subsystem, (2) a pressure-driven RO membrane desalination subsystem, and (3) a solar-driven feedback control module. The results of the pilot experiments indicated that the system, operated under wind speeds of 3 m s-1 or higher, can be used for brackish water desalination by reducing the salinity of feedwater with total dissolved solids (TDS) of over 3 000 mg L-1 to product water or permeate with a TDS of 200 mg L-1 or less. Results of the pilot experiments also indicated that the system can remove up to 97%of the nitrogenous wastes from the fish pond effluent and can recover and reuse up to 56%of the freshwater supply for fish pond operation.
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机译:水和能源是紧密相连的自然资源,水的运输,处理和分配取决于低成本的能源;而发电则需要大量的水。海水淡化是增加淡水供应量的一项成熟技术,但本质上是淡水能源的交易,对于水和能源都短缺的地区而言,这不是可行的解决方案。本文讨论了可再生能源驱动的反渗透(RO)系统用于海水淡化以及水产养殖废水的处理和回用的开发和应用。该系统由(1)风力驱动的抽气子系统,(2)压力驱动的RO膜淡化子系统和(3)太阳能驱动的反馈控制模块组成。中试实验的结果表明,该系统在3 m s-1或更高的风速下运行,可通过降低总溶解固体(TDS)超过3000 mg L的给水的盐度来用于微咸水淡化。 -1以产生水或透过200 mg L-1或更小的TDS渗透。中试实验的结果还表明,该系统可以从鱼塘废水中去除多达97%的含氮废物,并且可以回收和再利用多达56%的淡水用于鱼塘运营。
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