Millions from WasteTalbot, Frederick Arthur Ambrose
Philosophy
Millions from Waste
Talbot, Frederick Arthur Ambrose
Salvage (Waste, etc.); Waste products
When the idea was first taken in hand it was maintained that the
withdrawal of the oil would imperil the feeding qualities of the meal
residue. This being conclusively disproved it was then argued that the
employment of benzine for the purpose would depreciate its cattle-food
value, the idea doubtless being entertained that it must be associated
with a certain benzine flavour from coming into contact with the
solvent. But here again practice did not coincide with precept, because
horses will devour the meal, freshly drawn from the extractor, with
avidity, and look round for more, proving very convincingly that
the benzine is completely exhausted from the extractor after having
fulfilled its designed function. Experience has shown that meal made
from the de-oiled maize germ is every whit as good and as nourishing
as, if not actually superior to, that which has not been subjected to
the oil-recovery process.
The solvent extraction process has proved to be of incalculable value
to the firms specializing in the dry-cleaning of clothes, fabrics,
and textiles in general. When the articles are likely to be charged
with appreciable quantities of dirt, such as carpets, they are first
subjected to a dusting treatment which removes the superfluous or free
dirt. Wearing apparel, except in a few instances, does not require
submission to this preliminary operation and so is passed into the
washing machine, which contains only benzine, together with a slight
proportion of ammoniacal liquor. The garments are passed through
several successive washings and rinsings in various machines, to be
submitted finally to the hydro-extractor, where practically the whole
of the benzine is recovered, the goods being delivered practically dry.
But to be positive upon this point they are hung for three or four
hours in a drying room. The articles are then examined for any stains,
such as blood and grease marks, which have resisted elimination in the
mechanical cleaning process. These are removed by hand--“hand-spotting”
as it is called, either with water, or with benzine and a little
soluble soap and a brush.
The dirt and other deleterious matter removed by the benzine in the
washing and rinsing machines is separated from the solvent, which
undergoes a simple treatment, bringing about its complete purification,
when it is returned to the service-tanks for further use. The process
is one of continuous distillation, the benzine, as previously
mentioned, being used over and over again, it only being necessary to
add certain quantities from time to time to remedy the unavoidable
losses incurred. The wastage of benzine averages about 15 per cent.
of the weight of the goods treated. Seeing that about 4,500 gallons
may pass hourly through the machines and the circuit, the loss is
relatively low. The quantity of dirt removed, despite the thoroughness
of the process, is comparatively trifling.
Public-domain text, read in full here on John Shaqi.
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