Evaluation of commercial cleaning agents for sea-water reverse osmosis membranes

Desalination ◽  
1994 ◽  
Vol 99 (1) ◽  
pp. 169-188 ◽  
Author(s):  
S. Ebrahim ◽  
H. El-Dessouky
2015 ◽  
Vol 804 ◽  
pp. 299-303
Author(s):  
Baturalp Yalcinkaya ◽  
Jiri Chaloupek

Water pollution comprises all of those compounds that change the quality of groundwater and surface water, therefore reducing the suitability of natural water for human use and other vital processes. These compounds result from human activities, especially those that are industrial, agricultural and domestic.The polyamide thin film composite reverse osmosis membranes become important in desalination of sea water and brackish water or waste water. However the polyamide reverse osmosis membranes tend to fouling due to their hydrophobic and rough surfaces. In this study flux and rejection of waste water from aluminum production industry were obtained during filtration process by using modified commercial composite membranes. Amount of fouling was evaluated with unmodified and modified membranes. Rejection of iron particles and PH of feed and permeate solutions were determined after filtration process. Results shows that modified membranes were performed higher metal ion rejection and antifouling performance than unmodified membranes.


Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 377
Author(s):  
Federico Leon ◽  
Alejandro Ramos-Martin ◽  
Sebastian Ovidio Perez-Baez

The water situation in the Canary Islands has been a historical problem that has been sought to be solved in various ways. After years of work, efforts have focused on desalination of seawater to provide safe water mainly to citizens, agriculture, and tourism. Due to the high demand in the Islands, the Canary Islands was a pioneering place in the world in desalination issues, allowing the improvement of the techniques and materials used. There are a wide variety of technologies for desalination water, but nowadays the most used is reverse osmosis. Desalination has a negative part, the energy costs of producing desalinated water are high. To this we add the peculiarities of the electricity generation system in the Canary Islands, which generates more emissions per unit of energy produced compared to the peninsular generation system. In this study we have selected a desalination plant located on the island of Tenerife, specifically in the municipality of Granadilla de Abona, and once its technical characteristics have been known, the ecological footprint has been calculated. To do this we have had to perform some calculations such as the capacity to fix carbon dioxide per hectare in the Canary Islands, as well as the total calculation of the emissions produced in the generation of energy to feed the desalination plant.


2006 ◽  
Vol 40 (23) ◽  
pp. 7343-7349 ◽  
Author(s):  
Chuyang Y. Tang ◽  
Q. Shiang Fu ◽  
A. P. Robertson ◽  
Craig S. Criddle ◽  
James O. Leckie

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