| ENVIRONMENTAL
CONSIDERATIONS |
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| 6.1 |
STP should be regarded as potential source of nuisance
to the resident and the public, and therefore due consideration
should be given to the minimization of odour, noise and
safety problems. |
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| 6.2 |
STP should be sited with good buffering distance from
houses, or enclosed to minimize adverse impact. Open STP
should be fenced off to keep away trespassers. |
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| 6.3 |
Due consideration should be given to odour problem from
STP. Ventilation exhaust pipes should be taken to roof
level, or else odour treatment or masking facilities may
be required (e.g. activated carbon, peat filters etc.). |
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| 6.4
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To
minimize noise problem from STP, the designer should consider
the use of silencers, sound barriers, anti-vibration mounting
and blowers with motors of low r.p.m. (not exceeding 1
000 r.p.m.). Provision of an air blower is discouraged.
Alternatively, use of submersible ejectors should be considered
which would result in quieter operation. The intake and
exhaust grills of the ventilation system should also be
designed properly to reduce the whistling noise and should
not point towards nearby buildings. Reference should be
made to 'A Practical Guide for the Reduction of Industrial
Noise' published by this Department. |
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| 6.5 |
STP should be designed to minimize visual impact. Landscaping
with bushes and trees is encouraged, but not in places
where the leaves may fall into the tanks. |
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