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Monday, April 5, 127
The sewage treatment plant, to be located on a 17-hectare (42-cre)
site of reclaimed land at Tide Cove ne. the Sha Tin racecourse, would
probably begin initial operation in the second half of 1979.
Mr. ong said the treatment works would be able to treat more then
300,000 cubic metres of raw sewage per day.
"The maximum sewage flow to the plant for full treatment will be
a tremendous increase in treatment capacity
3.6 cubic metres per second
over our existing plants."
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At present, sewage at Sha Ting is being treated by a temporary plant
at To Tan which has a treatment capacity for only about 30,000 people.
An interim treatment plant is about to be built next to it by the
Civil Engineering Office of the Public works Department. This will triple
the sewage treatment facilities at Sha Tin New Town and ensure that Tolo
Harbour is not polluted before the large permanent sewage treatment works
comes on stream.
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The interim plant is due to come into operation in April 1977 but
it will have a relatively short life span as it will be phased out, together
with the existing temporary plant, when the permenent treatment works is
completed.
"When they have outlived their use at Sha Tin, the equipment in
these two temporary plants will be removed and probably put to other use
elsewhere," said Mr, Wong.
He explained that the treatment system of the permanent plant would
involve a series of complex processes which could roughly be divided into
three stages.
The first etage involves a process known as sedimentation whereby
the screened sewage is passed through tanks where all the gross solids are
removed, thus reducing the amount of pollutants by roughly 60 per cent.
The second