XN000022-1976-04-05 — Page 3

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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