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Notes on the electroplating wastewater decontamination chart
On the chart you can see the waste water decontamination station which# treats
wastewater from the processes of electroplating,
metal finishing, and printed circuits. Industrial waste water is collected in a
receptacle
and it may be contaminated with heavy metals, sulphates, pigments,
traces of oil, detergents, and lubricants. Waste water is collected in the
receptacle up to a determined to level.
All vessels have level sensors. Some of them have pH meters
Most of the valves are regulated by timers. The receptacle fill with
wastewater is dosed with concentrated waste solution,
acidic and alkaline, to avoid sudWden changes of concentration within the
process a decontamination.
Average wastewater is pumped to the reactor for decontamination.
The decontamination proceeds in such an order. Together with the wastewater, a
proper dose of FFH
is mixed on and other reagents are added as necessary.
When the reactor is full, the aeration is switched on to mix# the wastewater.
In the reactor heavy metal ions interact with ions of iron
with the valence of two and OH, forming insoluble oxyhydrates of
iron.
Influenced by oxygen dissolved in the water, they form ferrites.
Other metals from the wastewater are absorbed by the oxyhydrates.
The heavy magnetite formed is helpful for a quick settlementation.
Proper pH values are necessary for these reactions.
PH is regulated by reagents. All systems for preparation reagents are on the
first floor,
and from there the reagents are pumped to vessels above the reactor.
According to the signal of the pH meter,
valves of acid or alkali are opened and reagents are added into the reactor.
For the pneumo-valves the section# is equipped with pneumo-stand
The main reagent to waste water decontamination, FFH,
ferriferous hydrosol, is prepared in generators by means of electron losses.
Waste particles of iron flake a place in a special #Iknowdick compartment and
are dissolved.
For the improvement of the process's stability of colloidal nanoparticles,
special latitude# is used. In the solution,iron is oxidized,
and iron ions are formed and hydrolyzed. Prepared FFH
is pumped to the vessel above the reactor and from there it is
automatically metered
for each portion of wastewater. The reaction proceeds with constant mixing
with compressed air.
And after the reaction is over, aeration is switched off,
the process of sedimentation proceeds. The sludge from the bottom of the
reactor
is pumped to the sludge compactor, where it becomes thicker for transfer to the
filter press.
The sludge in the filter presse is dewatered and reduced in volume.
Water from the top of the compactors returned to the intermediate vessel from
which the same volume# of decontaminated water flows by gravity from the reactor.
The sedimentation timeI# and the reactor opens the valve for water draining.
When the lower level is reached, the sensor closes the valve.
Clearwater from the intermedium vessel is pumped to the filters to remove
possible
mechanical particles. Water may be reused in industrial processes,
in the water system of the factory, or drained to sewage.
In areas where allowable concentration limits are specially low,
water may require additional treatment, then it may be used in industrial
processes.
In industries with wastewater containing
high concentrations of copper, it is treated in special drums to separate the
pure copper.
It is possible to increase automation and to manage in observe the system in
three ways:
by wifi or CMS links that allow managing the work in the system
from various points and the waste water decontamination stations
or outside;
from the main terminal the place where all information comes in real time and
operations may be regulated in various modes;
in the main terminal there is a black box that manages operations
and emergency simulations.
It is possible to operate the station remotely and to receive descent
consulting
by specialist of INECO# in real time.
The station operates automatically. Algorithms are prepared on the basis of
functional volumes#
of industrial production and the level of waste water contamination.
Operations beforehand determine prophylactic requirements
and the necessity to replenish materials and other information.
This makes it possible for long-duration operations
without interruptions. On the diagrams hydraulic and other streams are specially
marked.
Detailed diagrams in 3d allow for quick
and precise assembly. Subtitles End: mo.dbxdb.com