There are several methods of water filtration and purification described in the document. Nanotechnology uses nanoparticles coated with silver ions to destroy contaminants in water. Membrane chemistry filters water through ultra-fine pores as small as 10-20 nanometers to purify it. Wastewater processing technologies are being developed to transform wastewater into resources like fertilizers or energy while reducing treatment costs. Seawater desalination also aims to desalinate water using minimal energy, such as by mimicking biological processes in mangrove plants and fish.

2. THERE ARE MANY WAYS OF WATER
FILTRATION SUCH AS:
• nanotechnology in
filtration
The technology removes bacteria,
microbes and
other diseases from water using
nanoparticles.
Nano particles release silver ions
which
destroy contaminants.
nanoparticle:
A microscopic
particle of matter
that is measured on
the nanoscale,usually
one that measures
less than 100
nanometers.
membrane chemistry
Membranes trough which water passes to
be filtered and purified, are integral to
modern water treatment processing. The
pores used in ultrafiltration can be just 10
or 20 nanometers across-3,000 times finer
than human air.
membrane:
The thin,
limiting
covering of a
cell or cell
part.

3. wastewater processing
New technologies are promising to transform
wastewater into a resource for energy
generation and a source of drinking
water.Modular hybrid activated sludge
digesters,for instance, are now removing
nutrients to be used as fertilizers an are, in
turn, driving down energy requiered for
treatment by up to half.
seawater desalination
Seawater desalination is extremely expensive.
It works by mimicking the biological process by
which mangrove plants and euryhaline fish
extract seawater using minimal energy.
Another new approach is to use biomimetic
membranes enhanced with aquaporin:
proteins embedded in cell membranes that
selectively shuttle water in and out of cells
while blocking out salts.
Euryhaline
fish:
fish that
can live in
fresh briny
or salt
water
Fertilizer:
Any substance
used to fertilize
the soil,especially
a comercial or
chemical manure.