Life cycle assessment of salinity gradient energy recovery using reverse electrodialysis

2020 ◽  
Author(s):  
Katelyn E. Mueller ◽  
Jeffrey T. Thomas ◽  
Jeremiah X. Johnson ◽  
Joseph F. DeCarolis ◽  
Douglas F. Call
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Recovery ◽  
Salinity Gradient ◽  
Reverse Electrodialysis ◽  
Gradient Energy

scholarly journals Life cycle assessment of salinity gradient energy recovery by reverse electrodialysis in a seawater reverse osmosis desalination plant

2020 ◽  
Vol 4 (8) ◽  
pp. 4273-4284 ◽  
Author(s):  
Carolina Tristán ◽  
Marta Rumayor ◽  
Antonio Dominguez-Ramos ◽  
Marcos Fallanza ◽  
Raquel Ibáñez ◽  
...  
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Recovery ◽  
Large Scale ◽  
Salinity Gradient ◽  
Reverse Electrodialysis ◽  
Desalination Plant ◽  
Gradient Energy ◽  
Seawater Reverse Osmosis ◽  
Reverse Osmosis Desalination

LCA of lab-scale and large-scale stand-alone RED stacks and an up-scaled RED system co-located with a SWRO desalination plant.

scholarly journals Reverse Electrodialysis: Potential Reduction in Energy and Emissions of Desalination

2020 ◽  
Vol 10 (20) ◽  
pp. 7317
Author(s):  
Carolina Tristán ◽  
Marcos Fallanza ◽  
Raquel Ibáñez ◽  
Inmaculada Ortiz
Keyword(s):  
Energy Supply ◽  
Energy Demand ◽  
Energy Recovery ◽  
Salinity Gradient ◽  
Potential Reduction ◽  
Reverse Electrodialysis ◽  
Current State ◽  
Gradient Energy ◽  
Seawater Reverse Osmosis ◽  
Desalination Plants

Salinity gradient energy harvesting by reverse electrodialysis (RED) is a promising renewable source to decarbonize desalination. This work surveys the potential reduction in energy consumption and carbon emissions gained from RED integration in 20 medium-to-large-sized seawater reverse osmosis (SWRO) desalination plants spread worldwide. Using the validated RED system’s model from our research group, we quantified the grid mix share of the SWRO plant’s total energy demand and total emissions RED would abate (i) in its current state of development and (ii) if captured all salinity gradient exergy (SGE). Results indicate that more saline and warmer SWRO brines enhance RED’s net power density, yet source availability may restrain specific energy supply. If all SGE were harnessed, RED could supply ~40% of total desalination plants’ energy demand almost in all locations, yet energy conversion irreversibility and untapped SGE decline it to ~10%. RED integration in the most emission-intensive SWRO plants could relieve up to 1.95 kg CO2-eq m−3. Findings reveal that RED energy recovery from SWRO concentrate effluents could bring desalination sector sizeable energy and emissions savings provided future advancements bring RED technology closer to its thermodynamic limit.

Reverse electrodialysis in bilayer nanochannels: salinity gradient-driven power generation

2018 ◽  
Vol 20 (10) ◽  
pp. 7295-7302 ◽  
Author(s):  
Rui Long ◽  
Zhengfei Kuang ◽  
Zhichun Liu ◽  
Wei Liu
Keyword(s):  
Power Generation ◽  
Energy Harvesting ◽  
Salinity Gradient ◽  
Reverse Electrodialysis ◽  
Gradient Energy ◽  
Ion Transportation

To evaluate the possibility of nano-fluidic reverse electrodialysis (RED) for salinity gradient energy harvesting, we consider the behavior of ion transportation in a bilayer cylindrical nanochannel with different sized nanopores connecting two reservoirs at different NaCl concentrations.

scholarly journals Chemical and Energy Recovery Alternatives in SWRO Desalination through Electro-Membrane Technologies

2021 ◽  
Vol 11 (17) ◽  
pp. 8100
Author(s):  
Marta Herrero-Gonzalez ◽  
Raquel Ibañez
Keyword(s):  
Renewable Energy ◽  
Salinity Gradient ◽  
Raw Material ◽  
Reverse Electrodialysis ◽  
Bipolar Membranes ◽  
Impact Reduction ◽  
Acid And Base ◽  
Readiness Level ◽  
Gradient Energy ◽  
Membrane Technologies

Electro-membrane technologies are versatile processes that could contribute towards more sustainable seawater reverse osmosis (SWRO) desalination in both freshwater production and brine management, facilitating the recovery of materials and energy and driving the introduction of the circular economy paradigm in the desalination industry. Besides the potential possibilities, the implementation of electro-membrane technologies remains a challenge. The aim of this work is to present and evaluate different alternatives for harvesting renewable energy and the recovery of chemicals on an SWRO facility by means of electro-membrane technology. Acid and base self-supply by means of electrodialysis with bipolar membranes is considered, together with salinity gradient energy harvesting by means of reverse electrodialysis and pH gradient energy by means of reverse electrodialysis with bipolar membranes. The potential benefits of the proposed alternatives rely on environmental impact reduction is three-fold: (a) water bodies protection, as direct brine discharge is avoided, (b) improvements in the climate change indicator, as the recovery of renewable energy reduces the indirect emissions related to energy production, and (c) reduction of raw material consumption, as the main chemicals used in the facility are produced in-situ. Moreover, further development towards an increase in their technology readiness level (TRL) and cost reduction are the main challenges to face.

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