Water & Wastewater Asia November/December 2020
Water & Wastewater Asia is an expert source of industry information, cementing its position as an indispensable tool for trade professionals in the water and wastewater industry. As the most reliable publication in the region, industry experts turn this premium journal for credible journalism and exclusive insight provided by fellow industry professionals. Water & Wastewater Asia incorporates the official newsletter of the Singapore Water Association (SWA).
Water & Wastewater Asia is an expert source of industry information, cementing its position as an indispensable tool for trade professionals in the water and wastewater industry. As the most reliable publication in the region, industry experts turn this premium journal for credible journalism and exclusive insight provided by fellow industry professionals. Water & Wastewater Asia incorporates the official newsletter of the Singapore Water Association (SWA).
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IN THE FIELD 17<br />
How the FG module works<br />
TMP range for CIP recorded during the operation<br />
EXPERIMENT RESULTS<br />
Tests conducted using surface water<br />
from the Da river showed that the colour,<br />
turbidity, iron, and aluminium from raw<br />
river water did not meet Vietnamese<br />
drinking water quality standards, but water<br />
samples collected from the UF membrane<br />
filtrate met the same standard across all<br />
parameters. The team concluded that<br />
a combination of coagulation and UF<br />
membrane filtration with disinfection as<br />
a post-treatment would be applicable for<br />
drinking water production.<br />
CONCLUSIONS DRAWN<br />
The tests conducted to test the<br />
effectiveness of UF membrane filtration<br />
for river water were carried out with and<br />
without coagulation as a pre-treatment<br />
test – the tests that used the UF membrane<br />
were found to produce water that met<br />
Vietnamese drinking water quality<br />
standards.<br />
This indicated to the team that this method of<br />
water treatment could be used to avoid coagulation<br />
and/or sedimentation as pre-treatment steps.<br />
In addition to this finding, the filtration flux of<br />
the tests conducted also found that the flux<br />
was higher than reported reference values,<br />
indicating that the number of modules required<br />
for water treatment plants could be reduced<br />
with the usage of Kuraray’s FG modules.<br />
For the Lo river, the team found that<br />
samples taken from the river contained<br />
colours and levels of turbidity, iron,<br />
aluminium, and arsenic that did not<br />
meet Vietnamese drinking water quality<br />
standards. With the UF membrane, all<br />
samples were found to be well below<br />
restrictions implemented by Vietnamese<br />
drinking water quality standards, with the<br />
exception of colour (which was close to the<br />
standard value of 15 TCU).<br />
The colour could be removed through<br />
a combination of coagulation and UF<br />
membrane filtration, which were found to<br />
effectively remove humic substances in the<br />
river water.<br />
Tests were conducted on the Lo and Da rivers in Vietnam using Kuraray’s FG modules<br />
<strong>November</strong> / <strong>December</strong> <strong>2020</strong> • waterwastewaterasia.com
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