TY - JOUR
T1 - An Autopsy of Nanofiltration Membrane Used for Landfill Leachate Treatment
AU - Demir, Ibrahim
AU - Koyuncu, Ismail
AU - Guclu, Serkan
AU - Yildiz, Senol
AU - Balahorli, Vahit
AU - Caglar, Suphi
AU - Turken, Turker
AU - Pasaoglu, Mehmet E.
AU - Kaya, Recep
AU - Sengur-Tasdemir, Reyhan
N1 - Publisher Copyright:
© 2015 Ibrahim Demir et al.
PY - 2015
Y1 - 2015
N2 - Komurcuoda leachate treatment plant, Istanbul, which consists of membrane bioreactor (MBR) and nanofiltration (NF) system, faced rapid flux decline in membranes after 3-year successful operation. To compensate rapid flux decline in membranes, the fouled membranes were renewed but replacement of the membranes did not solve the problem. To find the reasons and make a comprehensive analysis, membrane autopsy was performed. Visual and physical inspection of the modules and some instrumental analysis were conducted for membrane autopsy. Membranes were found severely fouled with organic and inorganic foulants. Main foulant was iron which was deposited on surface. The main reason was found to be the changing of aerator type of MBR. When surface aerators were exchanged with bottom diffusers which led to increasing of dissolved oxygen (DO) level of the basin, iron particles were oxidized and they converted into particulate insoluble form. It was thought that probably this insoluble form of the iron particles was the main cause of decreased membrane performance. After the diagnosis, a new pretreatment alternative including a new iron antiscalant was suggested and system performance has been recovered.
AB - Komurcuoda leachate treatment plant, Istanbul, which consists of membrane bioreactor (MBR) and nanofiltration (NF) system, faced rapid flux decline in membranes after 3-year successful operation. To compensate rapid flux decline in membranes, the fouled membranes were renewed but replacement of the membranes did not solve the problem. To find the reasons and make a comprehensive analysis, membrane autopsy was performed. Visual and physical inspection of the modules and some instrumental analysis were conducted for membrane autopsy. Membranes were found severely fouled with organic and inorganic foulants. Main foulant was iron which was deposited on surface. The main reason was found to be the changing of aerator type of MBR. When surface aerators were exchanged with bottom diffusers which led to increasing of dissolved oxygen (DO) level of the basin, iron particles were oxidized and they converted into particulate insoluble form. It was thought that probably this insoluble form of the iron particles was the main cause of decreased membrane performance. After the diagnosis, a new pretreatment alternative including a new iron antiscalant was suggested and system performance has been recovered.
UR - http://www.scopus.com/inward/record.url?scp=84934924745&partnerID=8YFLogxK
U2 - 10.1155/2015/850530
DO - 10.1155/2015/850530
M3 - Article
AN - SCOPUS:84934924745
SN - 2356-6140
VL - 2015
JO - The Scientific World Journal
JF - The Scientific World Journal
M1 - 850530
ER -