TY - JOUR
T1 - Impact of blended tap water and desalinated seawater on biofilm stability
AU - Zhang, Jufang
AU - Liang, Juan
AU - Hu, Jiangyong
AU - Xie, Rongjing
AU - Gomez, Mylene
AU - Deng, Anqi
AU - Ong, Choon Nam
AU - Adin, Avner
N1 - Publisher Copyright:
© 2013, © 2013 Balaban Desalination Publications. All rights reserved.
PY - 2014/9
Y1 - 2014/9
N2 - Abstract: Seawater, converted by reverse osmosis (RO) membrane into desalinated water when introduced to drinking water distribution systems and mixed with tap water of natural source, may affect the stability of existing biofilms attached to the pipeline. A continuous flow system consisting of four identical, parallel 1 L CDC biofilm reactors was installed. The reactors were operated with dechlorinated tap water for 55 days. Thereafter, water made of 100% tap water, 100% RO desalinated seawater, and 70/30 and 30/70 mixed tap water/desalinated seawater were continuously applied. Analyses of the bulk water heterotrophic plate count (HPC), biofilm HPC, total carbohydrate content (TCC), and denaturing gradient gel electrophoresis (DGGE) was carried out. No obvious changes in HPC and TCC were observed in bulk water. But, continuous feed with 100% desalinated water resulted in higher bacterial count than the other treatments. The DGGE data showed that higher portion of the RO desalinated seawater resulted in less biodiversity.
AB - Abstract: Seawater, converted by reverse osmosis (RO) membrane into desalinated water when introduced to drinking water distribution systems and mixed with tap water of natural source, may affect the stability of existing biofilms attached to the pipeline. A continuous flow system consisting of four identical, parallel 1 L CDC biofilm reactors was installed. The reactors were operated with dechlorinated tap water for 55 days. Thereafter, water made of 100% tap water, 100% RO desalinated seawater, and 70/30 and 30/70 mixed tap water/desalinated seawater were continuously applied. Analyses of the bulk water heterotrophic plate count (HPC), biofilm HPC, total carbohydrate content (TCC), and denaturing gradient gel electrophoresis (DGGE) was carried out. No obvious changes in HPC and TCC were observed in bulk water. But, continuous feed with 100% desalinated water resulted in higher bacterial count than the other treatments. The DGGE data showed that higher portion of the RO desalinated seawater resulted in less biodiversity.
KW - Biofilm
KW - Desalinated water
KW - DGGE
KW - HPC
KW - TCC
UR - http://www.scopus.com/inward/record.url?scp=84907875314&partnerID=8YFLogxK
U2 - 10.1080/19443994.2013.816870
DO - 10.1080/19443994.2013.816870
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AN - SCOPUS:84907875314
SN - 1944-3994
VL - 52
SP - 5806
EP - 5811
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
IS - 31-33
ER -