Electrodialysis Can Lower the Environmental Impact of Hemodialysis

The hemodialysis technique, used worldwide for patients with chronic kidney disease, is considered as a treatment with a high economic and ecological impact, especially for water consumption. Getting ultrapure water for the preparation of the dialysate to clean patient's blood from toxins leads...

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Bibliographic Details
Published in:Membranes (Basel) 2022-01, Vol.12 (1), p.45
Main Authors: Abarkan, Ahmed, Grimi, Nabil, Métayer, Hubert, Sqalli Houssaïni, Tarik, Legallais, Cécile
Format: Article
Language:English
Subjects:
Bioengineering
Brackish water
Chemical and Process Engineering
Chlorine
Conductivity
Demineralization
demineralization rate
Demineralizing
Desalination
Dialysis
Dissolved salts
Electrodes
Electrodialysis
Energy consumption
Engineering Sciences
Environment and Society
Environmental impact
Environmental Sciences
Experiments
Flow velocity
Hemodialysis
Impact analysis
Irrigation water
Kidney diseases
Laboratories
Life Sciences
Membranes
Patients
Rehabilitation
Reverse osmosis
reverse osmosis rejects
Salts
Sewage
Sodium
Sodium chloride
specific energy consumption
Sterilization
Swimming pools
Toxins
Water conservation
Water consumption
Water quality
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Summary:The hemodialysis technique, used worldwide for patients with chronic kidney disease, is considered as a treatment with a high economic and ecological impact, especially for water consumption. Getting ultrapure water for the preparation of the dialysate to clean patient's blood from toxins leads to high volumes of salt-enriched water that directly goes to sewage. The aim of this work is to propose operating conditions for electrodialysis to allow the reuse of reverse osmosis (RO) rejects. We first performed a parametric study to evaluate the influence of different parameters, such as flow rates, initial concentration, and applied voltage on the demineralization rate (DR) and specific energy consumption (SPC) with a NaCl model solution. The optimal conditions for desalination (i.e., a potential of 12 V, and flow rate of 20 L·h ) were then successfully applied to real samples collected from a dialysis center with total dissolved salts concentration of about 1.4 g/L (conductivity of 2.0 mS·cm ). We demonstrated that the choice of adequate conductivity targets allowed meeting the physico-chemical requirements to obtain water re-usable for either rehabilitation swimming pool, manual or machine washing of instruments before sterilization or irrigation. Saving this water could contribute in the reduction of the environmental impact of hemodialysis.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12010045