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首页> 外文会议>2011 Membrane technology conference amp; exposition. >Cost of Desalinating Seawater Based on LBWD's Prototype Facility Testing
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Cost of Desalinating Seawater Based on LBWD's Prototype Facility Testing

机译：基于LBWD原型设施测试的海水淡化成本

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The Long Beach Water Department (LBWD) has performed extensive seawater desalination research using a 300,000 gpd Prototype plant. LBWD patented two pass nanofiltration (NF2) was compared against traditional seawater reverse osmosis (RO) side by side. The primary purpose of the Prototype testing was to generate data to better accurately estimate the cost for a full-scale production of desalinated seawater. This cost analysis was performed using the NF~2 cost model (ADC, 2009) provided by US Bureau of Reclamation (Reclamation) and data generated from the Prototype tests were used whenever possible.rnResults from the cost analysis demonstrated the comparable efficiency and reliability of the NF~2 process against RO for seawater desalination. Based on the model, and incorporating the Prototype operational data, the cost of product water from the NF~2 processes ranges from $4.07 to $4.24/kgal for a 50 mgd plant, and for a two-pass RO process (necessary to produce equivalent water quality), the cost ranges from $4.46 to $5.02/kgal. The cost analysis also confirmed the established cost breakdown for desalinated water: energy and capital cost each contributes to about 40% of the overall cost.rnIn addition, various sensitivity analyses, including varying project life, finance rates, membrane life, energy, and plant size, were conducted to ensure that sufficient information are available for project planning purposes. The impact of reducing the size of the plant was significant: the average cost of product water for a 5 mgd facility was 53 to 78 percent more than a 50 mgd facility, depending on the process selected. Besides the plant size, the energy cost and finance rate also significantly impacted the overall product water cost. Other factors, including plant life cycle and membrane life cycle yielded minimal impacts on the product water costs. Cost analyses were conducted with inflation, and showed that the cost of product water at the end of the 30 year project life was twice as much as the beginning of the project. Regardless of the type of analyses, it was shown that the NF2 process resulted in the lowest cost of product water meeting the drinking water regulations and goals.
机译：长滩水务局（LBWD）已使用300,000 gpd的原型工厂进行了广泛的海水淡化研究。并排比较了LBWD获得专利的两次通过纳滤（NF2）与传统海水反渗透（RO）。原型测试的主要目的是生成数据，以更好地准确估算大规模生产淡化海水的成本。这项成本分析是使用美国填海局（Reclamation）提供的NF〜2成本模型（ADC，2009）进行的，并尽可能使用原型测试产生的数据。成本分析的结果表明，该模型具有可比的效率和可靠性。用于海水淡化的NF〜2反渗透工艺。基于该模型并结合了Prototype操作数据，对于50 mgd的工厂和两次通过的RO工艺（生产等效水所必需的），NF〜2工艺产生的产品水成本范围为$ 4.07至$ 4.24 / kgal。质量），成本从4.46美元到5.02美元/千克之间不等。成本分析还证实了淡化水的既定成本细分：能源和资本成本各占总成本的40％。此外，各种敏感性分析，包括项目寿命，融资率，膜寿命，能源和工厂的变化，进行规模分析，以确保有足够的信息可用于项目规划。减少工厂规模的影响是巨大的：5毫克/天设施的生产用水的平均成本比50毫克/天设施的生产水的平均成本高53％至78％，具体取决于所选的过程。除了工厂规模之外，能源成本和融资率也显着影响了总产品水成本。其他因素（包括工厂生命周期和膜生命周期）对产品水成本的影响最小。在通货膨胀的基础上进行了成本分析，结果表明，在30年项目生命周期结束时的产品水成本是项目开始时的两倍。不管分析的类型如何，都表明NF2工艺可实现满足饮用水法规和目标的最低产水成本。

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