Seawater membrane distillation desalination for potable water provision on remote islands − A case study in Vietnam

Duong, Hung Cong; Tran, Lan Thi Thu; Truong, Hoa Thi; Nelemans, Bart

doi:10.1016/j.cscee.2021.100110

Cited by 18 publications

(5 citation statements)

References 15 publications

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“…Therefore, the STEC values are lower, which indicates higher internal thermal recovery. These results are in agreement with previous studies carried out with similar modules of the same manufacturer [20,[27][28][29]. With increasing salinity, the performance decreases in both modules because the lower water activity decreases the driving force for the same operating conditions [30].…”

Section: Resultssupporting

confidence: 92%

Influence of internal design on the performance of pilot vacuum-assisted air-gap membrane distillation modules for brine concentration with solar energy

Requena,

Andrés-Mañas,

Zaragoza

2024

Desalination

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Section: Resultssupporting

confidence: 92%

Influence of internal design on the performance of pilot vacuum-assisted air-gap membrane distillation modules for brine concentration with solar energy

Requena,

Andrés-Mañas,

Zaragoza

2024

Desalination

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“…Table 2 summarises the ranges of the different input variables (TEI, FFR, TCI, and S) used in the experiments. Temperature ranges are the most commonly reported in pilot-scale MD literature, taking into account that TEI of 80 • C is the maximum limit established to avoid damaging the membrane structure, the spacers and the condensation sheets [41][42][43]. Moreover, this temperature is in the optimal range of operation with low-grade heat sources that can be coupled to MD, such as solar or waste heat [30,44].…”

Section: Methodsmentioning

confidence: 99%

Application of Machine Learning to Characterize the Permeate Quality in Pilot-Scale Vacuum-Assisted Air Gap Membrane Distillation Operation

Requena,

Andrés-Mañas,

Gil

et al. 2023

Membranes

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Membrane distillation (MD) is a thermal desalination technique proposed for the valorization of residual brines that other operations such as reverse osmosis cannot treat. Previous studies have shown that vacuum-assisted air gap (V-AGMD) operation in commercial multi-envelope modules improves the performance of MD noticeably. However, the permeate quality at pilot scale has not been thoroughly characterized so far. The aim of this study is, therefore, to assess and model the effect of the main operating conditions (feed flow rate, inlet temperatures, and feed salinity) on the permeate quality. Results from different steady-state experiments allowed to estimate descriptive metrics such as the salt rejection factor (SRF) and the membrane leak ratio (MLR). Given their non-linear behavior, these metrics were subsequently modeled using artificial neural networks (ANN) to estimate the permeate quality in the whole scope of operating conditions. Acceptable SRF results with MLR values lower than 0.2% confirmed the validity of MD as an operation for the treatment of concentrated brines, although the salinity of the resulting permeate does not comply in all cases with that permitted for human consumption.

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“…Alternatives for low-cost freshwater resources such as rainwater (S2) or high-cost resources such as seawater treatment (S3) are well recognized by the top officials in Con Dao. However, these alternatives would require affordable and workable technologies (for seawater) [28][29][30] and raising awareness in local people's perceptions on saving freshwater (for rainwater and other facilities) [31][32][33]. While a considerable amount of finance and technical training to apply the new technologies is of concern, raising awareness is doable for local officials given their experience in campaigning and propaganda.…”

Section: The Roadmaps For Sustainable Water Management In Con Dao Islandmentioning

confidence: 99%

Enhancing Water Supply Resilience in a Tropical Island via a Socio-Hydrological Approach: A Case Study in Con Dao Island, Vietnam

Nguyen

Luu

et al. 2021

Water

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Socio-hydrological approaches are gaining momentum due to the importance of understanding the dynamics and co-evolution of water and human systems. Various socio-hydrological approaches have been developed to improve the adaptive capacity of local people to deal with water-related issues. In this study, a social-hydrological approach was developed to enhance the water supply resilience in Con Dao Island, Vietnam. We used a water-balance model, involving the Water Evaluation and Planning (WEAP) tool, to conduct a scenario-based evaluation of water demands. In doing so, we assessed the impacts of socio-economic development, such as population growth and climate change, on increasing water demand. The modelling results showed that the existing reservoirs—the main sources to recharge the groundwater (accounting for 56.92% in 2018 and 65.59% in 2030)—play a critical role in enhancing water supply resilience in the island, particularly during the dry season. In addition, future water shortages can be solved by investment in water supply infrastructures in combination with the use of alternative water sources, such as rainwater and desalinated seawater. The findings further indicate that while the local actors have a high awareness of the role of natural resources, they seem to neglect climate change. To meet the future water demands, we argue that upgrading and constructing new reservoirs, mobilizing resources for freshwater alternatives and investing in water supply facilities are among the most suitable roadmaps for the island. In addition, strengthening adaptive capacity, raising awareness and building professional capacity for both local people and officials are strongly recommended. The research concludes with a roadmap that envisages the integration of social capacity to address the complex interaction and co-evolution of the human–water system to foster water-supply resilience in the study area.

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Seawater membrane distillation desalination for potable water provision on remote islands − A case study in Vietnam

Cited by 18 publications

References 15 publications

Influence of internal design on the performance of pilot vacuum-assisted air-gap membrane distillation modules for brine concentration with solar energy

Influence of internal design on the performance of pilot vacuum-assisted air-gap membrane distillation modules for brine concentration with solar energy

Application of Machine Learning to Characterize the Permeate Quality in Pilot-Scale Vacuum-Assisted Air Gap Membrane Distillation Operation

Enhancing Water Supply Resilience in a Tropical Island via a Socio-Hydrological Approach: A Case Study in Con Dao Island, Vietnam

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