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This digital document is a journal article from Desalination, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The mechanism of reducing fouling by means of ozone was investigated using wastewater from a wastewater treatment facility. Effects such as particle size increase from particle destabilization, organic degradation from high MW to low MW, and bio-fouling reduction from microbiological disinfection were studied. By means of ozone treatment, the permeate flux decline by fouling was improved, E. coli was disinfected completely, the thickness of the foulant layer was reduced by about 50%, and most of high molecular weight (MW) was degraded to low MW, respectively. However, the concentration of TOC in permeates increased by about 70%, and the amount of small particle size distribution (less than 5 @mm) was increased. From these results, the major membrane fouling reduction effect resulted from the degradation of organic compounds, from high MW to low MW, and microbiological The SEM images of the membrane cross-section revealed that the thickness of the foulant layer was about 1.4 @mm with ozone treatment. Without ozone treatment the cross-section image was about 3.2 @mm. This could be due to the fact that foulants degraded from high MW material to low MW and penetrated into the permeate. The increase of TOC concentration was another result of the degradation reaction. .
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This digital document is a journal article from Desalination, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Le stress hydrique que connait le monde, et la prospection de nouvelles ressources en eau, de nombreux scientifiques se penchent sur la question pour essayer de trouver des solutions pour depolluer l'eau et la rendre potable. Ajoutant au manque d'eau, la pollution de celui-ci tres divers necessitent a chaque fois des investigations nouvelles et la mise au point de procedes specifiques, afin de depolluer toutes sources d'eau a usage humain. Nous nous interessons, a la technique de filtration sur sable (de la region sud ouest de l'Algerie), comme etant une phase indispensable pour le pres traitement de l'eau, de tels procedes sont reconnus comme bien adaptes au milieu rural, puisqu'ils presentent, une bonne qualite de traitement, un fonctionnement simple et une maintenance relativement limitee. Sachant que la region de Bechar(1000 km de la capitale) est une region sableuse, comme travail preliminaire deux echantillons de sable on ete pris comme lit filtrant: celui de Taghit (90 km vers le sud) ainsi que de Kenadsa (18 km vers le sud-est). Le but est la valorisation de ce materiau abandon dans notre region, l'eau a filtre ete une eau brute du barrage qui alimente la ville ainsi qu'une eau provenant d'un forage de 53 m de profondeur. .
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