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Washing Chemicals in wash water reclamation systems-2
by wacle 2012-01-03 16:23:57
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   Washing Chemicals in Wash Water Reclamation Systems
               
Most people now realize that Wash Water Reclamation Systems require  the use of washing 
               chemicals that do not defeat the water cleaning process.

 Most chemical companies now offer “Quick Release” products to fulfill the need for a good 
               soap that is effective at removing grease and road film while 
being unstable enough to 
               breakdown in the reclaim process.

 

 The purpose of this communiqe is to offer a greater understanding of the complications a 
               rising from the use of an incorrect washing detergent and to
help in locating the “right” 
               detergent that allows for the proper operation of
your wash water recycling systems. 
               It is worth mentioning that all
systems discharging to sanitary sewers through oil/water 
               separators,
as well as recycling systems, would benefit form heeding the advice offered herein.

               The oil and grease deposited on the surface of a dirty vehicle must be Sufficiently emulsified 
               to the point that they will flow from the vehicle before
the emulsion breaksdown. 
               If an emulsion is too unstable, re-deposition of
the oil and greas is possible. 

Emulsification occurs when two normally immiscible liquids are successfully mixed.  One of the
               liquids (oil, in this case) forms tiny droplets that suspend
within the other liquid(water, in this 
               case) by means of agitation and a
detergent.  The resulting effluent is wash water containing
               oil that is
both mechanically and chemically emulsified.  The mechanically-emulsified oil will 
               separate from the water when the agitation stops and sufficient quiet
time elapses allowing 
               for the oil to surface. The water and chemically-
emulsified oil, on the other hand, will not 
               separate on their own unless
the detergent used is designed to allow it to happen.

 

Our days are numbered that we may continue to allow this permanently emulsified waste stream to go 
               unchecked out the door of the industrial sector.
For some, those days are already in the past. 
               The local multi-million-dollar
Sewer plant cannot handle the oil and greases being sent to them.
               
so it is rasonable to assume that a $30,000 on-site reclaim system cannot handle it either. 
               It’s simple; before the waste wash water can be reclaimed
by anyone or anything, the emulsion of oil 
               and water must be broken.

            
               Traditionally, users of detergents have discharged the effluent down the drain with no thought as to 
               what happened next. Once the user installs an oil/water
eparator or full recycling system, the 
               consequences of emulsification
are encountered.  Chemical emulsification defeats the oil separating

 capabilities of water cleaning systems,  returning to the pressure washer operator unimproved. In the 
       process, the filters and   carbon are fouled
rendering them ineffective. Remember, there is much to be 
       gained by
improving sewer discharges to avoid high.
       
       
SOPAS
      
Soap is a curious substance, designed to solve an intriguing problem. Most dirt that will not simply 
       wipe off or be shaken out is in fast some form of fat or
grease. In most households the most 
       common leaning agent is tap water.

The problem is that grease and water fall into two different and largely incompatible chemical groups. 
           Drop oil into water, and it will tend to
float or form discrete droplets. Pour water into oil and you will 
           see the same
effect. Additionally, substances such as salt and sugar that dissolve in water will not 
           dissolve in oil, whereas something like petrol will only float on water
but is quite capable of dissolving 
            oil.

         THE CHEMISTRY OF OILS

This difference in behavior is due to the nature of the molecules involved.

Water is largely polar, that is, water molecules tend to separate into fragments with opposite electrical 
           charges, one positive and one negative. Chemicals such
as table salt that happen to be made up of 
           collections of charged fragments, or
ions, find it easy to dissolve in water because the positive ions in 
            the salt
are attracted to the negative ions in the salt are attracted to the negative ions in the water, 
            and vice versa. Similary, the charged nature of water means
that water is a good conductor of electricity.                    

            Fats and oils, on the other hand, tend not to be polar. Their molecules have no particular electrical 
         charge, and so are not attracted to polar substances
such as salt.Instead, they prefer to bond with
         other non-polar substances.
Fats and oils tend to be electrical insulators.

 

        This, then, returns us to the washing-up. You have a greasy dish in a bowl of water, but the grease is 
         showing no inclination to dissolve in the water because
the water is polar and the grease is not.
         Attack the grease with a cloth and most
of what you achieve is to move it around on the plate,
         because it is trying to
flatten itself against the surface of the plate in a effort to get away from the

 water molecules.

 The soap molecule is a halfway house. It consists of a long strand with an ionic water-loving, 
            grease-repelling group on one end, and a non-polar
grease-loving, water-repelling group on the 
            other. If you drop soap 
into clean water, all the molecules gather on the surface with their water-
            loving (hydrophilic) ionic ends stuck in the water and their
fat-loving   (lipophilic) ends waving in the 
            air. Slide a dirty dish in, however,
and the lipophilic end of  each molecule sticks to the grease as it 
            slips past.

As the dish sinks, it takes the soap  molecules with it, attached by their heads to the grease but still
            waving their hydrophilic tails in the water
like microscopic tadpoles.

 

All you have to do now is bash at the dirt with a sponge or cloth, and it can be persuaded to 
            leave the plate, for as it lifts off the surface it becomes
insulated from the water as new soap
            molecules rush in and try to bury their
heads in it. The end result is a small blob of grease completely 
            surrounded 
by a layer of soap molecules, all with their lipophilic heads pointing inwards and their 
            hydrophilic tails pointing outwards  As far as the grease is concerned,
all it can see are lipophilic 
            molecules, and as far as the water is concerned,
all it can see is a rather large hydrophilic lump.

 

  Eventually, of course, all the soap molecules are used up, and you have to tip out the washing-up 
        water and start again. Pass the tea-towel.

Although olive plantations and olive oil production were known since earliest antiquity-tablets 
           from Ebla dated 2400 BC mention olives and olive
oil-the actual manufacture of soap from olive oil 
           seems to have been a more
recent development.

 

Soap is first mentioned as a medicinal lotion used in the treatment of certain conditions of the scalp 
            and skin. This early soap was produced from
animal and oils.

It is cited in early Sumerian and Assyrian tables, as well as in Egyptian papyri. The Roman historian 
        Pliny, writing in the 1st century AD, attributes the invention
of soap to the Gauls.

 

Whatever its origins, by the Early Middle Ages soap produced from olive had become a thriving 
           business all over the civilized world. Aleppo in
Northern Syria was particularly famous for the quality of 
           its soap produced
in the many small workshops concentrated in the Bab Qinnisrin area.

 

By the 16th century, the workshops had been transformed into large factories and specialized areas 
           (Hay Al-Masabin), Souks (Shari Al-Sabbana)and Khans
(Khan Al Saboun) came into being to cater for 
            the booming soap industry.
And they are still in existence to day.

 

Commercial soap Companies use salt in a soap mixture to separate the glycerin from the soap. Then 
            they siphon off the glycerin leaving only a
detergent soap(not real soap). It is  then sold at high cost 
            for
Shampoo’s, expensive soaps or used to make explosives.

 
 
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