XN000022-1975-07-29 — Page 2

TUESDAY, JULY 29, 1975

BIOLOGICAL TREATMENT PROCESSES PROVE SUITABLE FOR H K SEWAGE

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EXPERIMENTS CARRIED OUT BY THE PILOT SEWAGE TREATMENT PLANT AT SHEK WU HUI NEAR FANLING HAVE PRODUCED SATISFACTORY RESULTS.

THE FOUR TYPES OF BIOLOGICAL TREATMENT PROCESSES ADOPTED BY THE PLANT HAVE PROVED TO BE SUITABLE FOR THE SEWAGE PREVAILING IN HONG KONG.

ANNOUNCING THIS, A SPOKESMAN FOR THE PUBLIC WORKS DEPARTMENT'S CIVIL ENGINEERING OFFICE, WHICH IS RESPONSIBLE FOR THE PROJECT, SAID THAT EACH OF THE PROCESSES HAS BEEN ABLE TO REMOVE 90 PER CENT OF THE POLLUTANTS IN THE SEWAGE.

HE ADDED THAT THE FINAL EFFLUENT FROM THE TREATMENT PLANT IS NOW WELL WITHIN THE DESIGNED STANDARD SET FOR IT..

THE FOUR TYPES OF BIOLOGICAL PROCESSES ARE DIFFUSED AIR AERATION, DIRECT OXYGENATION, HIGH RATE BIOLOGICAL FILTRATION AND OXIDATION PONDS. THEIR MAIN FUNCTION IS TO UTILISE MICRO-ORGANISM TO ASSIMILATE THE POLLUTANTS IN THE SEWAGE,

THE SPOKESMAN SAID THAT SINCE ITS OPENING IN JUNE LAST YEAR, THIS $13.5 MILLION PLANT HAD PROVIDED NOT ONLY FULL TREATMENT FACILITIES TO THE SEWAGE FROM THE POPULATION IN SHEK WU HUI BUT ALSO PROVIDED THE WORKS STAFF WITH ADEQUATE TRAINING OPPORTUNITIES FOR MODERN TECHNIQUES IN SEWAGE TREATMENT.

IT IS ALSO USED AS AN EXPERIMENTAL CENTRE FOR SUCH TECHNIQUES, HE ADDED.

THE EXPERIMENTAL OPERATIONS AT THE PLANT WILL CONTINUE FOR ANOTHER 18 MONTHS DURING WHICH FULL-SCALE TESTS OF THE PROCESSES AT VARYING LOADING AND SEASONAL CONDITIONS WILL BE CONDUCTED, HE SAID.

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