Saline Groundwater from Coastal Aquifers As a Source for Desalination.
Saline Groundwater from Coastal Aquifers As a Source for Desalination.
复制标题
来自沿海含水层的咸水地下水作为海水淡化的来源。
DOI：
--
复制
发表时间：
2016
影响因子：
11.4
通讯作者：
R. Kasher
中科院分区：
文献类型：
--
作者：
Shaked Stein;A. Russak;O. Sivan;Y. Yechieli;E. Rahav;Y. Oren;R. Kasher
反渗透（RO）海水淡化是目前在干旱地区缩小饮用水供需之间差距的普遍手段。目前，RO操作的主要障碍之一是结垢，其阻碍膜性能并引起压力损失，从而降低系统效率。另一种水源是从渗透到淡水-海水界面之下的沿海含水层的海滩威尔斯井中抽取的含盐地下水，其盐度接近海水。在这项研究中，我们研究了潜在的使用沿海含水层的地下咸水作为给水淡化海水相比，使用现场工作和实验室的方法。对地下咸水的化学、微生物学和物理性质进行了表征，并与海水进行了比较。此外，反渗透脱盐实验中的交叉流系统进行，评估渗透通量，盐拒绝和污垢的不同类型的水的倾向。我们的研究结果表明，咸地下水是显着的青睐海水作为饲料来源的化学成分，微生物含量，泥沙密度，和污垢的潜力，并表现出更好的脱盐性能与较小的通量下降。含盐地下水可能是一个更好的水源，通过反渗透脱盐，由于较低的污染潜力，并减少预处理成本。
Reverse osmosis (RO) seawater desalination is currently a widespread means of closing the gap between supply and demand for potable water in arid regions. Currently, one of the main setbacks of RO operation is fouling, which hinders membrane performance and induces pressure loss, thereby reducing system efficiency. An alternative water source is saline groundwater with salinity close to seawater, pumped from beach wells in coastal aquifers which penetrate beneath the freshwater-seawater interface. In this research, we studied the potential use of saline groundwater of the coastal aquifer as feedwater for desalination in comparison to seawater using fieldwork and laboratory approaches. The chemistry, microbiology and physical properties of saline groundwater were characterized and compared with seawater. Additionally, reverse osmosis desalination experiments in a cross-flow system were performed, evaluating the permeate flux, salt rejection and fouling propensities of the different water types. Our results indicated that saline groundwater was significantly favored over seawater as a feed source in terms of chemical composition, microorganism content, silt density, and fouling potential, and exhibited better desalination performance with less flux decline. Saline groundwater may be a better water source for desalination by RO due to lower fouling potential, and reduced pretreatment costs.