Cover screening, degritting, and flow measuring facilities
Primary sedimentation tanks
Cover the tanks and install deodourising units
Biotrickling filters deodourising units
Odour compound decomposed by micro-organisms
Activated carbon deodourising units
Odour compound adsorbed by activated carbon
Nearby Estate / Village
||Horizontal Distance from Ventilation Shaft (about)
|Kam Tai Court
|A Kung Kok Fishermen Village
|Tai Shui Hang Village
|Mui Tsz Lam Village
Caverns as natural barriers are highly conducive to effective odour control. We will furthermore enclose all odour sources and provide de-odourisation facilities inside the caverns. The location of the cavern ventilation shaft has also been further optimized and shifted to a more remote spot.
Through the multi-barrier control measures, detailed EIA analysis indicates that the arrangement will not cause any perceivable odour. The maximum predicted odour level at any of the nearby residential areas / development (Chevalier Garden, Kam Tai Court, Mui Tsz Lam Village, A Kung Kok Fishermen Village, Tai Shui Hang Village, Shing Mun Springs, the Castello, Sha Tin Hospital, etc) will be less than one Odour Unit. This is far lower than the five Odour Unit limit stipulated in the Environmental Impact Assessment Ordinance.
The outlet of the ventilation shaft will be inconspicuous and landscaped to blend in with the surroundings of Nui Po Shan.
Caverns as natural barriers
We will conduct odour impact assessment for the relocated Sha Tin Sewage Treatment Works. The assessment will recommend effective odour control measures and identify suitable ventilation shaft locations so as to mitigate the odour impact to the nearby community to meet the requirement of relevant standards.