Role of pressure-retarded osmosis (PRO) in the mega-ton water project
Role of pressure-retarded osmosis (PRO) in the mega-ton water project
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DOI：
10.1080/19443994.2016.1168582
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发表时间：
2016-11-01
影响因子：
1.1
通讯作者：
Tomioka, Hiroki
中科院分区：
文献类型：
--
作者：
Kurihara, Masaru;Sakai, Hideyuki;Tomioka, Hiroki
反渗透(RO)膜已广泛应用于海水淡化和废水回用，自2000年以来已经建成了许多大型反渗透工厂(>；10万m(3)/d)。能源效率对于大型工厂来说是不可或缺的，特别是未来百万吨级的海水反渗透(SWRO)工厂(100万m(3)/d)。为了降低反渗透运行中的能源需求，在百万吨级水系工程中，研究了高效低压反渗透膜、能量回收装置(ERD)和从淡水和浓盐水的盐度梯度中回收电能的减压渗透(PRO)。研制了中空纤维膜组件，并在样机上进行了一年的连续运行试验。在我们的PRO原型工厂，使用10英寸组件的膜功率密度最大为13.5W/m(2)。结果表明，采用高效低压反渗透膜和ERD，不仅可以节能20%，而且PRO系统还可以进一步节能10%。
Reverse osmosis (RO) membranes have been widely applied to seawater desalination and wastewater reclamation, and many large RO plants (>100,000m(3)/d) have been constructed since 2000. Energy efficiency is indispensable for large plants, especially for future mega-ton scale seawater reverse osmosis (SWRO) plant (1,000,000 m(3)/d). In order to reduce energy demand in RO operation, high-efficient low-pressure RO membrane, energy recovery device (ERD), and pressure-retarded osmosis (PRO) which would recover power from salinity gradient between freshwater and concentrated brine were studied in the Mega-ton Water System project. A PRO hollow fiber membrane module was newly developed, and a practical continuous operation has been examined at a prototype plant for oneyear. The maximum 13.5W/m(2) of membrane power density using 10-inch module was established at our prototype PRO plant. As the results of the plant cost estimation and the financial impacts on the energy saving operation at the mega-ton scale SWRO plants, not only 20% energy reduction by the high-efficient low-pressure RO membrane and the ERD but also further 10% energy saving was possible by using the PRO system.