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首页> 外文期刊>Desalination: The International Journal on the Science and Technology of Desalting and Water Purification >Lab scale assessment of power generation using pressure retarded osmosis from wastewater treatment plants in the state of Kuwait
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Lab scale assessment of power generation using pressure retarded osmosis from wastewater treatment plants in the state of Kuwait

机译：使用科威特州污水处理厂的减压渗透技术进行发电的实验室规模评估

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Discharge from the desalination plants of Kuwait returns brines of high salinity to the Gulf that contain other contaminants, such as chlorine or chromium, impacting the environment of the coastal region. Conversely, wastewater discharges to the Gulf have low salinity but may drive eutrophication of coastal waters. Pressure retarded osmosis (PRO) is a promising source of renewable energy and an emerging membrane-based technology for recovering energy from concentration differences between water streams. The proposed work examines the feasibility of using PRO to generate energy from wastewater and desalination plants in Kuwait by calculating the power density using a PRO zero-dimensional model. The model accounts for concentration polarization (CP) and salt leakage (B') effects to produce realistic results. The effects of CP and (B')on the power density at varying applied pressures and varying concentration differences between the feed and draw solutions are studied. Case studies on the potential re-use of treated wastewater effluent (TWE) and brine reject streams from three wastewater treatment plants (WWTPs) in Kuwait are discussed and compared to determine the maximum power generated from each of the WWTPs. The power densities generated from wastewater treatment (WWT) plants in Al-Jahra city, Urn Al-Haiman city and Al-Riqqa were studied. The power density from Al-Haiman WWTP (18.73 W/m(2)) is the highest compared to those of the other two WWTPs. The limits of the zero-dimensional model are also presented in this study. The PRO power density (W) was studied as a function of hydraulic pressure (Delta P) at different feed and draw solution concentrations. At higher draw solution concentrations (85 g/L NaCl), the power densities were higher. This increase in power density values was attributed to the higher driving forces acting in the system. Concentration polarization (CP) and salt leakage (B') reduce the driving forces across the membrane. The power density values (W) were smallest in the presence of both CP and(B'). The effects of CP and (B') vary depending on the concentrations of the draw and feed solutions. (C) 2016 Elsevier B.V. All rights reserved.
机译：科威特海水淡化厂的废水将高盐度的盐水返回海湾，其中含有氯或铬等其他污染物，影响了沿海地区的环境。相反，排入海湾的废水盐度低，但可能导致沿海水域富营养化。压力渗透（PRO）是一种有前途的可再生能源，并且是一种基于膜的新兴技术，可以从水流之间的浓度差异中回收能量。拟议的工作通过使用PRO零维模型计算功率密度，检验了使用PRO从科威特的废水和海水淡化厂发电的可行性。该模型考虑了浓度极化（CP）和盐泄漏（B'）的影响，以产生真实的结果。研究了CP和（B'）在变化的施加压力下以及进料和汲取溶液之间的浓度差异变化对功率密度的影响。讨论了有关科威特三个污水处理厂（WWTP）的处理后废水和盐水废液潜在再利用的案例研究，并进行了比较，以确定每个污水处理厂产生的最大功率。研究了Al-Jahra市，Urn Al-Haiman市和Al-Riqqa市污水处理厂（WWT）产生的功率密度。与其他两个污水处理厂相比，Al-Haiman污水处理厂的功率密度最高（18.73 W / m（2））。零维模型的局限性也在本研究中提出。在不同进料和抽取溶液浓度下，研究了PRO功率密度（W）与液压（Delta P）的关系。在较高的汲取溶液浓度（85 g / L NaCl）下，功率密度较高。功率密度值的增加归因于系统中更高的驱动力。浓差极化（CP）和盐分泄漏（B'）会降低跨膜的驱动力。在CP和（B'）均存在的情况下，功率密度值（W）最小。 CP和（B'）的影响取决于汲取溶液和进料溶液的浓度。 （C）2016 Elsevier B.V.保留所有权利。

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