More than 30% energy saving seawater desalination system by combining with sewage reclamation

Takabatake, Hiroo; Noto, Kazuhiko; Uemura, T.; Ueda, Shinjiro

doi:10.1080/19443994.2012.699257

Cited by 6 publications

(6 citation statements)

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“…However, those initial studies did not account for some drawbacks and challenges of the hybrid that need to be considered as well [ 67 ] in order to have a fair assessment of FO-RO hybrids compared to SWRO: Implementation of FO will require investment costs Energy consumption in RO is getting close to the thermodynamic limit and additional energy savings may become marginal [ 70 ]. The FO-RO hybrid also has to demonstrate advantages in comparison with two independent and established water treatment streams (i.e., water reuse and/or desalination) or simple mixing of these streams before treatment [ 71 ]. …”

Section: Combining Desalination and Water Reuse Through Fo-ro Hybrmentioning

confidence: 99%

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Efficiently Combining Water Reuse and Desalination through Forward Osmosis—Reverse Osmosis (FO-RO) Hybrids: A Critical Review

et al. 2016

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Forward osmosis (FO) is a promising membrane technology to combine seawater desalination and water reuse. More specifically, in a FO-reverse osmosis (RO) hybrid process, high quality water recovered from the wastewater stream is used to dilute seawater before RO treatment. As such, lower desalination energy needs and/or water augmentation can be obtained while delivering safe water for direct potable reuse thanks to the double dense membrane barrier protection. Typically, FO-RO hybrid can be a credible alternative to new desalination facilities or to implementation of stand-alone water reuse schemes. However, apart from the societal (public perception of water reuse for potable application) and water management challenges (proximity of wastewater and desalination plants), FO-RO hybrid has to overcome technical limitation such as low FO permeation flux to become economically attractive. Recent developments (i.e., improved FO membranes, use of pressure assisted osmosis, PAO) demonstrated significant improvement in water flux. However, flux improvement is associated with drawbacks, such as increased fouling behaviour, lower rejection of trace organic compounds (TrOCs) in PAO operation, and limitation in FO membrane mechanical resistance, which need to be better considered. To support successful implementation of FO-RO hybrid in the industry, further work is required regarding up-scaling to apprehend full-scale challenges in term of mass transfer limitation, pressure drop, fouling and cleaning strategies on a module scale. In addition, refined economics assessment is expected to integrate fouling and other maintenance costs/savings of the FO/PAO-RO hybrid systems, as well as cost savings from any treatment step avoided in the water recycling.

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Section: Combining Desalination and Water Reuse Through Fo-ro Hybrmentioning

confidence: 99%

“…The FO-RO hybrid also has to demonstrate advantages in comparison with two independent and established water treatment streams (i.e., water reuse and/or desalination) or simple mixing of these streams before treatment [ 71 ].…”

Section: Combining Desalination and Water Reuse Through Fo-ro Hybrmentioning

confidence: 99%

Efficiently Combining Water Reuse and Desalination through Forward Osmosis—Reverse Osmosis (FO-RO) Hybrids: A Critical Review

et al. 2016

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“…Today, the integrated system is being used widely in single pass and single stage, and multi-pass and multi-stage, which have been described above, and specific systems with high efficiency aiming to achieve further energy saving and cost reduction are currently being investigated. For example, in a system that integrates seawater desalination and sewage reclamation, RO brine water discharged from the sewage reclamation process dilutes seawater to reduce the osmotic pressure and reduce the energy consumption of SWRO treatment [ 78 , 79 , 80 ]. The authors’ group constructed a facility named “Water Plaza” in Kitakyushu, Japan, including a demonstration plant of 1400 m 3 /day of product water as shown in Figure 8 .…”

Section: Ro Processmentioning

confidence: 99%

“…The biofouling potential, measured through mBFR as described above, of the mixed water was much higher than that of UF pre-treated seawater and BWRO brine, but the optimal biocide dosage succeeded in suppressing the biofouling and stable operation was achieved. The product water was supplied to an electric power plant and used as boiler water, and it is estimated that it achieved more than 30% energy saving in seawater desalination [ 79 , 80 ]. According to the above mentioned result, Hitachi and New Energy and Industrial Technology Development Organization (NEDO) are currently progressing with a business demonstration at 6250 m 3 /day of product water in South Africa.…”

Section: Ro Processmentioning

confidence: 99%

Advanced Technologies for Stabilization and High Performance of Seawater RO Membrane Desalination Plants

2021

Self Cite

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Seawater desalination plants that use reverse osmosis (RO) membranes have become a core part of social infrastructure, and should be designed to meet the needs of product water quality and production capacity, while considering various environmental factors such as the seawater quality, temperature and geographical features. Furthermore, stable operation while overcoming various problems should be achieved alongside the increasing demands for energy saving and cost reduction. As no universal plant apparatus and operation technology meets these various requirements, the plants need to be customized for individual solutions. This paper reviews and summarizes the proven technologies, including their advantages/disadvantages, and points to cutting-edge technologies related to the design and operation maintenance of seawater intake, pre-treatment and the RO desalination process.

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“…The small-scale database contained SEC data of desalination processes reported in peer-reviewed literature published since 2000 [16,[19][20][21][22]27,35,36,41,42,[52][53][54][55][56][57][58][59][60][61], including information for the raw water flow rate q rw (m 3 /day), product water flow rate q pw (m 3 /day), recovery R (unitless), year YR, raw water TDS c rw (mg/L), product water TDS c pw (mg/L), operating (feed) pressure P (bar), energy recovery ER (binary variable, unitless), and temperature T ( • C). These desalination factors, summarized in Table 2, represented the explanatory variables in our multiple linear regression model for small-scale desalination facilities, referred to here as the small-scale model.…”

Section: Methodsmentioning

confidence: 99%

Predicting the Specific Energy Consumption of Reverse Osmosis Desalination

Stillwell

Webber

2016

Water

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Desalination is often considered an approach for mitigating water stress. Despite the abundance of saline water worldwide, additional energy consumption and increased costs present barriers to widespread deployment of desalination as a municipal water supply. Specific energy consumption (SEC) is a common measure of the energy use in desalination processes, and depends on many operational and water quality factors. We completed multiple linear regression and relative importance statistical analyses of factors affecting SEC using both small-scale meta-data and municipal-scale empirical data to predict the energy consumption of desalination. Statistically significant results show water quality and initial year of operations to be significant and important factors in estimating SEC, explaining over 80% of the variation in SEC. More recent initial year of operations, lower salinity raw water, and higher salinity product water accurately predict lower values of SEC. Economic analysis revealed a weak statistical relationship between SEC and cost of water production. Analysis of associated greenhouse gas (GHG) emissions revealed important considerations of both electricity source and SEC in estimating the GHG-related sustainability of desalination. Results of our statistical analyses can aid decision-makers by predicting the SEC of desalination to a reasonable degree of accuracy with limited data.

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More than 30% energy saving seawater desalination system by combining with sewage reclamation

Cited by 6 publications

References 0 publications

Efficiently Combining Water Reuse and Desalination through Forward Osmosis—Reverse Osmosis (FO-RO) Hybrids: A Critical Review

Efficiently Combining Water Reuse and Desalination through Forward Osmosis—Reverse Osmosis (FO-RO) Hybrids: A Critical Review

Advanced Technologies for Stabilization and High Performance of Seawater RO Membrane Desalination Plants

Predicting the Specific Energy Consumption of Reverse Osmosis Desalination

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