Emerging investigator series: onsite recycling of saline–alkaline soil washing water by forward osmosis: techno-economic evaluation and implication,Environmental Science: Water Research & Technology

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Emerging investigator series: onsite recycling of saline–alkaline soil washing water by forward osmosis: techno-economic evaluation and implication
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-08-08 , DOI: 10.1039/d0ew00490a
Zhicheng Xu _{1,

2,

3,

4,

5} , Ming Xie _{6,

7,

8,

9} , Jung Eun Kim _{6,

7,

8,

9} , Nazmul Huda _{10,

11,

12,

13,

14} , Zideng Gao _{1,

2,

3,

4,

5} , Guoxue Li _{1,

2,

3,

4,

5} , Wenhai Luo _{1,

2,

3,

4,

5}

Affiliation

This study investigated the techno-economic feasibility of forward osmosis (FO) for onsite recycling of saline–alkaline soil washing water with an all-purpose liquid fertiliser as a draw solution. Commercially available polyamide thin-film composite and aquaporin FO membranes (denoted HTI and AQP membranes, respectively) were compared under different operating conditions. Results showed that the incorporation of aquaporin vesicles offered the AQP membrane better transport properties (i.e. higher water permeability and lower salt permeability) than the HTI membrane. Thus, the AQP membrane exhibited a much higher water flux and lower reverse solute flux than the HTI membrane in response to either an increase in operating temperature or draw solution concentration. In particular, the water flux of the AQP membrane enhanced from 20.2 to 42.4 L m⁻² h⁻¹ with a temperature increase from 25 to 40 °C. Although over 85% water recovery with effective retention of dissolved inorganic salts could be achieved by both FO membranes in concentration of saline–alkaline soil washing water, the AQP membrane was more techno-economically feasible in practice, mainly due to its higher water flux and lower capital and operational expenses. Nevertheless, the economic favourability of the AQP membrane (i.e. the total water cost) over the HTI membrane was largely determined by its membrane element cost.

中文翻译：

新兴的研究人员系列：通过正向渗透技术对盐碱土壤洗涤水进行现场回收：技术经济评价和意义

这项研究调查了正渗透（FO）在以通用液体肥料为汲取溶液的情况下对盐水-碱性土壤洗涤水进行现场回收的技术经济可行性。在不同的操作条件下比较了市售的聚酰胺薄膜复合材料和水通道蛋白FO膜（分别表示为HTI和AQP膜）。结果表明，水通道蛋白囊泡的掺入为AQP膜提供了更好的转运特性（即较高的水渗透性和较低的盐渗透性）。因此，响应于操作温度的升高或汲取溶液浓度的提高，AQP膜比HTI膜表现出更高的水通量和更低的逆溶质通量。特别地，AQP膜的水通量从20.2升至42.4L m ^-2 h ^-1温度从25上升到40°C。尽管两个FO膜在盐水-碱性土壤冲洗水中的浓度均可实现超过85％的水回收率并有效保留溶解的无机盐，但AQP膜在实践中在技术上经济上更为可行，这主要是由于其较高的水通量和降低资本和运营费用。然而，AQP膜在HTI膜上的经济可行性（即总水成本）在很大程度上取决于其膜元件成本。

更新日期：2020-10-02

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