Nano filtration - an effective way for textile effluent treatment
The 21st century has brought upon the worldwide material industry, the pressing need to lessen the water wastage, relating to the assembling procedure. This need has been further squeezed by the way that regulations on the release of emanating have been fixed the whole way across the globe.
Published on: Mar 3, 2016
Transcripts - Nano filtration - an effective way for textile effluent treatment
Nano-Filtration - An Effective Way For Textile Effluent
century has brought upon the global textile industry, the urgent need to reduce
the water wastage, pertaining to the manufacturing process. This need has been further
pressed by the fact that regulations on the discharge of effluent have been tightened all
across the globe. Textile as an industry expels humongous amounts of water as waste,
which makes it essential for it to find out some feasible production techniques, which in
turn helps the industry meet the regulatory standards.
Thankfully enough, membrane filtration, and specifically nano-filtration is coming up as a
potential solution for the long standing problems of this industry. Nano filtration not only
helps the manufacturers substantially reduce the amount of waste water but also creates
an extensive possibility of recovering dyes and colorants, in order for them to be reused.
This technique will thus aid in considerable cost cutting as well as decrease in the overall
ecological footprint of the industry.
While it may be new to the textile sector, membrane filtration has found application in
numerous other industries, wherein it is used to concentrate, separate and even
fractionate various liquids with remarkable efficiency, that too on a molecular level. This
technique has always been widely used in reverse osmosis for purification purposes of
potable water as well as the desalination of saltwater. In fact, membrane filtration also
allows the harvest of numerous valuable products of the like of whey protein. It also aids
the purification and reuse of liquids, as in the case of electro-coat paint in the automotive
segment. Nano-filtration is a technique that by far, seems to be the most fitting solution in
terms of processing of the waste water and recovery of raw materials. Nano-filtration is
nothing but reverse osmosis carried out at lower pressure, and is found to be extremely
cost efficient especially of conducted under a properly maintained set-up, with the
There are quite a few liquids that form a substantial percentage of the waste streams
expelled out by textile mills, and nano-filtration has been found to be helpful in the case of
all of these. The first one being PVA or polyvinyl alcohol, that is majorly used to smoothen
and strengthen the fibres. This chemical is innate to the production of modern textiles, but
sadly, is highly toxic. Hence, it’s recovery as aided by the nano-filtration membrane is
expedient, both economically as well as environmentally. The next product that goes as
waste is the dye. Again, nano-filtration has come to the rescue in this regard, by aiding the
recovery of the unused dyes as well as salts and sulphides from the wastewater. Not only
does this operation help in improving the quality of the expelled water, but also helps in
the reuse of dyes.
It can be thus concluded that the nano-filtration technique has a great potential in terms
of reducing the ecological footprint of the textile industry by allowing the reuse of
chemicals that are not only valuable in terms of money, but are also indispensable with
respect to the process of manufacturing!